Journal articles on the topic 'Capacitor storage'
To see the other types of publications on this topic, follow the link: Capacitor storage.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Capacitor storage.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Raman, Sekhar Raghu, Ka-Wai (Eric) Cheng, Xiang-Dang Xue, Yat-Chi Fong, and Simon Cheung. "Hybrid Energy Storage System with Vehicle Body Integrated Super-Capacitor and Li-Ion Battery: Model, Design and Implementation, for Distributed Energy Storage." Energies 14, no. 20 (October 12, 2021): 6553. http://dx.doi.org/10.3390/en14206553.
Full textAbstract:
In this paper, a distributed energy storage design within an electric vehicle for smarter mobility applications is introduced. Idea of body integrated super-capacitor technology, design concept and its implementation is proposed in the paper. Individual super-capacitor cells are connected in series or parallel to form a string connection of super-capacitors with the associated management unit to form a panel. These super-capacitor panels are shaped to fit the alternative concept of vehicle design, and it solves the design issues and prepares for configurable electric vehicles. Body integration of super-capacitors enhances the acceleration, and regenerative braking performances of the electric vehicle increases the operating life of the Li-ion battery and improves space utilization by giving more area for the main energy source, the Li-ion battery. Integrating super-capacitor into the car body involves special packaging technology to minimize space and promotes distributed energy storage within a vehicle. This pioneering design encourages future configurable electric vehicles. Model of both the Li-ion battery and the super-capacitor employed is studied with its series internal resistance determined at various C-rates. Loss and the efficiency analysis of the bi-directional converter, traits of body integrated super-capacitors system and control of the interleaved bi-directional converter to regulate the power-sharing in the hybrid energy storage system is presented.
2
Ineneji, Collins, Olusola Bamisile, and Mehmet Kuşaf. "Super-Capacitors as an Alternative for Renewable Energy Unstable Supply." Academic Perspective Procedia 1, no. 1 (November 9, 2018): 11–20. http://dx.doi.org/10.33793/acperpro.01.01.3.
Full textAbstract:
In this article a Lithium battery and super-capacitors performance for energy storage in renewable is compared. A photo-voltaic system is considered with Lithium-ion (Li-ion) battery, then with a super-capacitor compared as the storage device. The super-capacitor consists of 10 capacitors connected in series and one in parallel. The comparison is made based on the state of charge and the output voltage of the two storage devices. Matlab/Simulink model is developed to make the analysis of the two systems. Li-ion battery displayed a uniform voltage of 0.9 V while the super-capacitor accumulated 250 V; when the simulation was done within a specific time frame. The Hybrid system however, drew a lower voltage of 15 V but a more stable supply is achieved over time. While the state of charge of the battery is constant over the time of simulation, the super-capacitor increases with time. The details of the simulation are presented in the full paper.
3
Wijono, Wijono, Zainul Abidin, Waru Djuriatno, Eka Maulana, and Nola Ribath. "Design of 4-stage Marx generator using gas discharge tube." Bulletin of Electrical Engineering and Informatics 10, no. 1 (February 1, 2021): 55–61. http://dx.doi.org/10.11591/eei.v10i1.1949.
Full textAbstract:
In this paper, a Marx generator voltage multiplier as an impulse generator made of multi-stage resistors and capacitors to generate a high voltage is proposed. In order to generate a high voltage pulse, a number of capacitors are connected in parallel to charge up during on time and then in series to generate higher voltage during off period. In this research, a 6kV Marx generator voltage multiplier is designed using gas discharge tube (GDT) as an electronic switch to breakdown voltage. The Marx generator circuit is designed to charge the storage capacitor for high impulse voltage and current generator applications. According to IEC 61000-4-5 class 4 standards, the storage capacitor must be charged up to 4 kV. The results show that the proposed Marx generator can produce voltages up to 6.8 kV. However, the storage capacitor could be charged up to 1 kV, instead of 4 kV in the standard. That is because the output impulse voltage has narrow time period.
4
Li, Yuke, Jibo Xu, Zhiyu Xu, Yahui Yu, Yuanhao Zhang, Lingzhi Lu, Weijie Zheng, et al. "Enhanced energy storage properties in relaxor Pb(Mg1/3Nb2/3)O3-PbTiO3 thin-film capacitors by incorporating buffer layers." Applied Physics Letters 120, no. 25 (June 20, 2022): 252901. http://dx.doi.org/10.1063/5.0094247.
Full textAbstract:
Recently, relaxor ferroelectric thin-film capacitors have attracted considerable attention for energy storage applications since their slim-type polarization–electric field hysteresis loops can yield large recoverable energy density ( Wrec) and high efficiency ( η). In this work, we study the effects of buffer layers on energy storage properties of 0.93Pb(Mg1/3Nb2/3)O3-0.07PbTiO3 (PMN-PT) thin-film capacitors with a 5 nm-thick SrTiO3 (STO) and LaAlO3 (LAO) films. The energy storage properties of Pt/PMN-PT/SrRuO3 (SRO) capacitors are found to be significantly changed by incorporating the STO or LAO buffer layer at the top Pt/PMN-PT interface, while inserting the buffer layer at bottom PMN-PT/SRO interface shows negligible effects on the electrical properties. Specifically, with the STO buffering, the breakdown field is dramatically increased in the Pt/STO/PMN-PT/SRO capacitor due to the existence of an internal field in the STO, which prevents the growth of electrical trees from the bottom SRO to the top Pt electrode, and a large Wrec of ∼48.91 J/cm3, more than three times of that of the PMN-PT capacitor, is achieved. However, buffered by the LAO, the Pt/LAO/PMN-PT/SRO capacitor exhibits a reduced relaxor character, which may be ascribed to a pinning effect of nanodomains associated with the charged LAO/PMN-PT interface. As a result, both Wrec and η are significantly lowered, compared to the non-buffered PMN-PT capacitor. These results provide physical insights into the modulation of relaxor and dielectric behaviors by designing the characteristics of buffer layers, demonstrating a way for enhancing energy storage properties in thin-film capacitors.
5
Steiks, Ingars, and Leonids Ribickis. "Voltage Monitoring on Capacitor of Modular Multilevel Converter." Scientific Journal of Riga Technical University. Power and Electrical Engineering 25, no. 25 (January 1, 2009): 145–50. http://dx.doi.org/10.2478/v10144-009-0031-1.
Full textAbstract:
Voltage Monitoring on Capacitor of Modular Multilevel ConverterA modular multilevel converter is an attractive solution for power conversion without transformers. As modular multilevel converter consists of cascade connections and floating dc capacitors, it requires continuous voltage monitoring. This paper represents voltage measurement circuit of a DC-storage capacitor including power supply with results of experiments.
6
G. Rajakumar. "Recent Advancements in Supercapacitor Technologies." December 2022 4, no. 4 (January 4, 2023): 256–67. http://dx.doi.org/10.36548/jucct.2022.4.004.
Full textAbstract:
Supercapacitors (SCs) are a form of energy storage that fills the vacuum left by traditional capacitors and batteries. They have greater energy storage capacity than capacitors and can deliver electricity at higher rates than batteries. Both the capacitor and supercapacitor have two electrodes (plates) separated by a dielectric, however super capacitors have electrodes with a larger surface area and thinner dielectrics, allowing for higher energy densities. Super capacitors are extensively employed in portable electronic devices due to its high storage capacity. The design, properties, and uses of supercapacitors are briefly discussed in this article.
7
Wang, Wenwen, Jin Qian, Chaohui Geng, Mengjia Fan, Changhong Yang, Lingchao Lu, and Zhenxiang Cheng. "Flexible Lead-Free Ba0.5Sr0.5TiO3/0.4BiFeO3-0.6SrTiO3 Dielectric Film Capacitor with High Energy Storage Performance." Nanomaterials 11, no. 11 (November 14, 2021): 3065. http://dx.doi.org/10.3390/nano11113065.
Full textAbstract:
Ferroelectric thin film capacitors have triggered great interest in pulsed power systems because of their high-power density and ultrafast charge–discharge speed, but less attention has been paid to the realization of flexible capacitors for wearable electronics and power systems. In this work, a flexible Ba0.5Sr0.5TiO3/0.4BiFeO3-0.6SrTiO3 thin film capacitor is synthesized on mica substrate. It possesses an energy storage density of Wrec ~ 62 J cm−3, combined with an efficiency of η ~ 74% due to the moderate breakdown strength (3000 kV cm−1) and the strong relaxor behavior. The energy storage performances for the film capacitor are also very stable over a broad temperature range (−50–200 °C) and frequency range (500 Hz–20 kHz). Moreover, the Wrec and η are stabilized after 108 fatigue cycles. Additionally, the superior energy storage capability can be well maintained under a small bending radius (r = 2 mm), or after 104 mechanical bending cycles. These results reveal that the Ba0.5Sr0.5TiO3/0.4BiFeO3-0.6SrTiO3 film capacitors in this work have great potential for use in flexible microenergy storage systems.
8
Pattipaka, Srinivas, Yeseul Lim, Yong Hoon Son, Young Min Bae, Mahesh Peddigari, and Geon-Tae Hwang. "Ceramic-Based Dielectric Materials for Energy Storage Capacitor Applications." Materials 17, no. 10 (May 11, 2024): 2277. http://dx.doi.org/10.3390/ma17102277.
Full textAbstract:
Materials offering high energy density are currently desired to meet the increasing demand for energy storage applications, such as pulsed power devices, electric vehicles, high-frequency inverters, and so on. Particularly, ceramic-based dielectric materials have received significant attention for energy storage capacitor applications due to their outstanding properties of high power density, fast charge–discharge capabilities, and excellent temperature stability relative to batteries, electrochemical capacitors, and dielectric polymers. In this paper, we present fundamental concepts for energy storage in dielectrics, key parameters, and influence factors to enhance the energy storage performance, and we also summarize the recent progress of dielectrics, such as bulk ceramics (linear dielectrics, ferroelectrics, relaxor ferroelectrics, and anti-ferroelectrics), ceramic films, and multilayer ceramic capacitors. In addition, various strategies, such as chemical modification, grain refinement/microstructure, defect engineering, phase, local structure, domain evolution, layer thickness, stability, and electrical homogeneity, are focused on the structure–property relationship on the multiscale, which has been thoroughly addressed. Moreover, this review addresses the challenges and opportunities for future dielectric materials in energy storage capacitor applications. Overall, this review provides readers with a deeper understanding of the chemical composition, physical properties, and energy storage performance in this field of energy storage ceramic materials.
9
Amar, Nissim, Aviv Ziv, Pavel Strajnikov, Alon Kuperman, and Ilan Aharon. "Topological Overview of Auxiliary Source Circuits for Grid-Tied Converters." Machines 11, no. 2 (January 27, 2023): 171. http://dx.doi.org/10.3390/machines11020171.
Full textAbstract:
This paper reviews different types of capacitors and auxiliary source circuit topologies and presents an introduction to control strategies used for circuit applications reducing DC-BUS capacitance. The paper argues in favor of replacing bulky electrolytic capacitors in capacitor-supported power electronic systems with auxiliary source circuits. DC-BUS capacitors are widely used in grid-tied power converters (rectifiers) and utilized for power balance, voltage ripple limitation, and short-term energy storage. The electrolyte capacitor is the Achilles heel of any rectifier and power converter due to its higher rate of failure than other circuitry components. Auxiliary source circuits are key components to qualitatively improve the reliability of the DC links, where they divert the instantaneous pulsating power into extra reliable storage components. Unlike previous work, this review serves to provide a clear picture of an auxiliary source circuit design, in favor of optimal solution selection according to the specific application. Therefore, energy storage components (capacitors), topologies, and control strategies of auxiliary source circuits are comprehensively reviewed in this paper. Additionally, detailed explanations, comparisons, and discussions of auxiliary source circuits are offered.
10
Wu, Tian Hao, Xin Ye Li, and Le Li. "Research Review of Composite Electrode Materials for Super Capacitor." Applied Mechanics and Materials 851 (August 2016): 37–41. http://dx.doi.org/10.4028/www.scientific.net/amm.851.37.
Full textAbstract:
Super capacitor, as a new type of power storage device, has been applied to various fields. This paper divides composite electrode materials of super capacitor into three main types. For each type, this paper analyses its performance, advantages and prospect. At last, a conclusion is drawn that it is a tendency to apply composite electrode materials to use for better performance capacitors.
11
Jones, Robert E., and Seshu B. Desu. "Process Integration for Nonvolatile Ferroelectric Memory Fabrication." MRS Bulletin 21, no. 6 (June 1996): 55–58. http://dx.doi.org/10.1557/s0883769400046091.
Full textAbstract:
The remanent-polarization states of ferroelectric capacitors have long been of interest for nonvolatile storage of digital data. A simple memory array can be formed by perpendicular rows and columns of conductors with a ferroelectric capacitor at each crosspoint. In the simplest geometry, these conductors also are the capacitor electrodes on either side of a ferroelectric layer. Each capacitor represents one bit of digital data. If a voltage of V0 is required to write a capacitor, then data can be written to a specific bit by applying V0/2 and –V0/2 to the appropriate row and column. Such ferroelectric memory arrays were constructed as early as the 1950s. However, due to the breath of the ferroelectric transition, they were not successful because during the write of a specific capacitor, the V0/2 voltage signals disturb the polarization in other capacitors. This is in contrast to the successful use of the analogous ferromagnetic crosspoint arrays, which are familiar as the core memories of early computer technology.
12
Wang, Rui Lan. "The Design of On-Board Supercapacitor Energy Storage System of Electric-Car." Advanced Materials Research 548 (July 2012): 591–94. http://dx.doi.org/10.4028/www.scientific.net/amr.548.591.
Full textAbstract:
Electric energy is the most convenient and clean energy sources, and it is used far and wide. While there are many problems of power quality which imperil greatly electronic loads. Modern times, high quality power supply is required by modern manufacturers, and a quick and efficient energy storage technology is now starved for in order to improve and solve the transitory power quality.As a new kind of energy storage component, super capacitors have fast response, high charge-discharge efficiency. This paper focuses on the application background that the super capacitor DC energy storage unit can improve the quality of electric energy, establish a mathematical model of the storage unit, analysis and design the control scheme of super capacitor DC storage energy system, to achieve rapid compensation of the instantaneous power of the system, effectively improving the power quality and stability of the system.
13
Biletsky, Oleh, Vitalii Kotovskyi, Nikolaj Višniakov, and Andžela Šešok. "Investigation of the Energy Characteristics of a Circuit under the Charge of a Supercapacitor and an Equivalent Linear Capacitor." Applied Sciences 12, no. 18 (September 13, 2022): 9182. http://dx.doi.org/10.3390/app12189182.
Full textAbstract:
In this paper, the energy characteristics of the charge circuits of a supercapacitor (nonlinear capacitor) and an equivalent linear capacitor from a DC voltage source, which is a lithium-ion battery for such energy storage devices, are analyzed. It is established under what conditions the losses of electricity in the charge circuits of linear and equivalent nonlinear capacitors from the DC voltage source are reduced. The influence of final and initial voltages on similar terminals and capacitance terminals on similar energy losses is analyzed. The regularities of increasing the energy transfer coefficient in the circuits of the aperiodic charge of supercapacitors and equivalent linear capacitors from a DC voltage source (battery) with increasing initial voltages at the capacitor terminals are determined.
14
Rodríguez-Benítez, Omar, Mario Ponce-Silva, Juan Antonio Aqui-Tapia, Óscar Miguel Rodríguez-Benítez, Ricardo Eliú Lozoya-Ponce, and Heriberto Adamas-Pérez. "Active Power-Decoupling Methods for Photovoltaic-Connected Applications: An Overview." Processes 11, no. 6 (June 14, 2023): 1808. http://dx.doi.org/10.3390/pr11061808.
Full textAbstract:
This study compares ripple port, stacked switched capacitor, and capacitive energy storage architectures for active power decoupling, comparing the number of components, performance, energy density, DC-link capacitor reduction, efficiency, and frequency operation to highlight their main benefits and drawbacks for single-phase grid-connected applications. The overview reveals equivalent effective energy density without electrolytic capacitors, as well as enhanced simplicity, performance, and durability, thereby providing stacked switched capacitors as an attractive power-decoupling alternative for multi-stage connected applications, based on the principle that its individual buffer capacitors absorb and deliver energy without tightly constraining their individual terminal voltages, while maintaining a narrow range voltage at the buffer DC port.
15
ŞAHİN DEMİREL, Ayça Nur, Fatmagül BAGI, Bünyamin YILDIRIM, and Serkan DEMİREL. "Lavanta İçin Yeni Bir Teknolojik Uygulama Alanı ve Tarımsal Üreticiler İçin Ekonomik Kar Analizi." Journal of the Institute of Science and Technology 13, no. 3 (May 12, 2023): 2185–94. http://dx.doi.org/10.21597/jist.1274733.
Full textAbstract:
Nowadays, the energy and agriculture sectors are united for financial efficiency, and it brought the question to minds “can be stored the electrical energy that used in agriculture with an agricultural product?”. In this study, lavender essential oil, it obtained from Lavandula angustifolia, was used as a part of energy storage system. The essential oil was produced by distillation method. To energy storage performance analysis, the simple electrochemical capacitor was formed with platin foils and lavender essential oil. The capacitor application performances showed that the lavender essential oil can energy storage up to 4 Voltages (V). A capacity of 92 milli-Farad per cm2 (mF/cm2) was obtained with Lavender essential oil in the range of 0-4 V, and this value showed that lavender essential oil can be used in capacitors, as an electrolyte material. The results when evaluated in terms of agricultural economics, 1 million capacitors with a size of 1 cm2 can be produced with 1 ton lavender crops production per decare. Moreover, with lavender capacitors, the amount of energy required for a farm of 1000 hectares can be stored with 1000 capacitors of 10 cm2. Also, the stored energy is more than the farm's annual energy consumption, saving the farm ~534 USD annually on energy costs. In the case that all farm energy is produced with renewable energy sources, the annual profit is calculated as ~23697 USD. Also, the exploring of electrochemical capacitor electrolyte property of lavender essential oil could create an alternative sales pitch for agricultural producers.
16
Sajjad, Muhammad, Fang Cheng, and Wen Lu. "Research progress in transition metal chalcogenide based anodes for K-ion hybrid capacitor applications: a mini-review." RSC Advances 11, no. 41 (2021): 25450–60. http://dx.doi.org/10.1039/d1ra02445k.
Full textAbstract:
Metal ion capacitors have gained a lot of interest as a new kind of capacitor-battery hybrid energy storage system because of their high power density while maintaining energy density and a long lifetime.
17
Choi, Woo Young, Gyuhan Yoon, Woo Young Chung, Younghoon Cho, Seongun Shin, and Kwang Ho Ahn. "A Technology-Computer-Aided-Design-Based Reliability Prediction Model for DRAM Storage Capacitors." Micromachines 10, no. 4 (April 17, 2019): 256. http://dx.doi.org/10.3390/mi10040256.
Full textAbstract:
A full three-dimensional technology-computer-aided-design-based reliability prediction model was proposed for dynamic random-access memory (DRAM) storage capacitors. The model can be used to predict the time-dependent dielectric breakdown as well as leakage current of a state-of-the-art DRAM storage capacitor with a complex three-dimensional structure.
18
Dudic, Duško. "Perspectives of Electricity Storage in Polymer Capacitors." Journal of Research Updates in Polymer Science 10 (December 30, 2021): 101–5. http://dx.doi.org/10.6000/1929-5995.2021.10.12.
Full textAbstract:
The price and environmental aspects of electricity storage significantly affect the application of green technologies. The electrochemical batteries are currently the best choice for storing electricity for most industrial needs and products. Polymer capacitors show very low energy density compared to conventional batteries and therefore cannot be widely used for electricity disposal. At the same time, all other features of polymer capacitors that characterize battery systems are ideal. After a brief comparison of the basic properties of electrochemical and physical batteries, this paper presents the influence of electron trapping on the energy density of a polyethylene capacitor. The presented results indicate that the phenomenon of electron trapping in polymers can increase the energy deposit of polymer capacitors.
19
Farhami, Nabieh, and Majid Monajjemi. "Investigation about electrostatic three-wall carbon nanotubes (MWCNT), including doping with BN: a model for the nano capacitor." Revista de la Universidad del Zulia 11, no. 29 (February 6, 2020): 79–97. http://dx.doi.org/10.46925//rdluz.29.06.
Full textAbstract:
Three-walled boron & nitride nanotubes are used for a theoretical study of a cylindrical molecular capacitor, including an inner cylinder with a positive charge distribution and an outer cylinder with a negative charge distribution. Due to the semiconductor characteristic and dielectric functionality of SWBNTs, DWBNTs and TW (B&C) NTs can be used as a capacitor. Although the SWBNTs @ SWCNTs behave like Nano cylindrical capacitors, we have shown in this study that a dopant of BN in the inner cylinder reduces the energy gap and yields a better capacitance. The dopant of BN in the outer cylinder results in an inverse charge distribution (outer is positive and inner is negative). Therefore under these circumstances, the term capacitor would be meaningless, thought, the gap and the interaction energy decreases compared to the non-dopant form of those capacitors. Density functional theory (DFT) calculations have performed for the structure and stability of three wall carbon Nano tubes (TW (BN&C) NTs). In this work, it was calculated the geometrical structure, and stability to predict NMR and thermodynamics parameters. A mixing of SWBNNTs @ DWCNTs has been modeled and calculated for the suitable structures to storage the H2 molecules for increasing the dielectric. We have found these kinds of Nano-structures are useful for maximum storages of charges compare to other cylindrical capacitor.
20
Hachlowski, Jakub, and Robert Stala. "Novel Converter for Voltage Balance in Series-Connected Capacitors and Batteries." Power Electronics and Drives 3, no. 1 (December 1, 2018): 65–74. http://dx.doi.org/10.2478/pead-2018-0011.
Full textAbstract:
Abstract This paper presents a novel concept of a circuit for voltage balance of three series-connected capacitors or batteries, as well as the research results. The problem is related to the control of voltage sharing on series capacitors, supercapacitors or battery banks in energy storage systems or direct current (DC)-link of four-level neutral-point-clamped inverters. The proposed circuit is a switched-capacitor (SC) resonant converter composed of a single capacitor and seven transistor switches. Control of the converter makes it possible to transfer energy between any capacitors, by switching selected transistors. This paper presents the basic concept of the converter, an analysis of control strategies and the simulation results for various cases of voltage balancing.
21
Nugroho, Sri, Luthfi Muhammad Mauludin, Togar Sirait, Mujiman Mujiman, Ahmad Sofyan, and Toto Tohir. "Design of Hybrid Energy System for Railway Application (Case Study of People Mover System in Doha, Qatar)." Current Journal: International Journal Applied Technology Research 4, no. 1 (April 3, 2023): 1–7. http://dx.doi.org/10.35313/ijatr.v4i1.112.
Full textAbstract:
This paper presents the conceptual design of hybrid energy system used in railway application. The hybrid system with batteries and energy storage double-layer capacitor is a new technology that is used under extreme climatic conditions, especially in daytime temperature up to 50°C, high relative humidity, dust and heavy rain. It is a combination of double-layer capacitors and traction batteries. It draws power both externally and from braking energy. In order to reduce CO2 emissions to the environment, energy-saving drives and energy storage are used. Also, in public transportation, Sitras Hybrid Energy System (HES), hybrid energy storage system for trams, has been developed which combines a double-layer capacitor with a nickel-metal hydride battery. The storage not only allows driving without overhead lines, it also enables braking energy to be recovered. A reliable cooling system is required to ensure that the performance of the battery and the capacitor storage is maintained for as long as possible. The results of finite element model showed the robustness for railway application. The computational model refers to proof of static and dynamic strength in accordance with EN12663. A cooling system for a tram using this innovative technology was designed and qualified for the "Qatar Education City People Mover System (PMS)" project.
22
Cui, Shuhui, Saleem Riaz, and Kai Wang. "Study on Lifetime Decline Prediction of Lithium-Ion Capacitors." Energies 16, no. 22 (November 13, 2023): 7557. http://dx.doi.org/10.3390/en16227557.
Full textAbstract:
With their high-energy density, high-power density, long life, and low self-discharge, lithium-ion capacitors are a novel form of electrochemical energy storage devices which are extensively utilized in electric vehicles, energy storage systems, and portable electronic gadgets. Li-ion capacitor aging mechanisms and life prediction techniques, however, continue to be active research areas. This paper examines the aging process for Li-ion batteries, covering the alterations in cell composition, the effect of the electrode charge state, temperature effects, and electrolyte deterioration. Additionally, this research offers approaches for predicting the lifespan of lithium-ion batteries, including those based on physical models, machine learning, and artificial intelligence. In this work, cycle life testing techniques are also discussed, including accelerated aging experiments for lithium-ion capacitors. The paper concludes by discussing future directions for the creation of aging mechanisms and lithium-ion capacitor life prediction techniques.
23
Zhang, Li Wei, Wei Bo Huang, and Xian Jin Huang. "The Energetic Macroscopic Representation Modeling of Super Capacitor Storage System and Capacity Configuration Research." Applied Mechanics and Materials 614 (September 2014): 155–59. http://dx.doi.org/10.4028/www.scientific.net/amm.614.155.
Full textAbstract:
Super capacitor bank operating characteristics have an important impact on the energy conversion efficiency and the construction cost of the hybrid energy storage system. To research the parameters and control properties of super capacitor in energy storage system, to establish a practical mathematical model and to propose the optimal design is important to improve the overall performance of the hybrid energy storage system. This paper presents the mathematical modeling of battery super capacitor hybrid energy storage system, studies the target parameters setting of hybrid energy storage system and the capacity configurations of super capacitor, and proposes an optimized design of the super capacitor bank. Finally, based on EMR verifies the theory.
24
Barbulescu, Corneliu, and Toma-Leonida Dragomir. "Parameter estimation for a simplified model of an electrolytic capacitor in transient regimes." Journal of Physics: Conference Series 2090, no. 1 (November 1, 2021): 012143. http://dx.doi.org/10.1088/1742-6596/2090/1/012143.
Full textAbstract:
Abstract The real capacitors’ behaviour in electric circuits modelled by a single capacity deviates from the ideal one. In order to find better compromises between precision and simplicity, different C-R-L models are used. In these models, C, R, L are called equivalent parameters and take constant values. Under these assumptions, the capacitors are modelled as lumped parameter subsystems although it is well known that the real capacitors are essentially distributed parameter systems. As highlighted in this paper, the capacitors are also time-variant subsystems. To prove this, we use two types of experimental data: data measured during the capacitor’s discharge process and data obtained from frequency characteristics. The article proposes two estimation methods of equivalent values for the model parameters C and R based on their time variance highlighted by the experimental data. The estimation methods use a system of equations associated with the discharging of capacitors, respectively, with the frequency characteristics via polynomial regression. The experiments were carried out with an electrolytic polymer capacitor rated 220 μF, 25 V, 2.5 A rms, 85 °C, designed mainly for energy storage and filtering, the results being confirmed by experiments performed on other similar capacitors.
25
Bolufawi, Omonayo, Annadanesh Shellikeri, and Jim P. Zheng. "Lithium-Ion Capacitor Safety Testing for Commercial Application." Batteries 5, no. 4 (December 7, 2019): 74. http://dx.doi.org/10.3390/batteries5040074.
Full textAbstract:
The lithium-ion capacitor (LIC) is a recent innovation in the area of electrochemical energy storage that hybridizes lithium-ion battery anode material and an electrochemical double layer capacitor cathode material as its electrodes. The high power compared to batteries and higher energy compared to capacitors has made it a promising energy-storage device for powering hand-held and portable electronic systems/consumer electronics, hybrid electric vehicles, and electric vehicles. The swelling and gassing of the LIC when subjected to abuse conditions is still a critical issue concerning the safe application in power electronics and commercial devices. However, it is imperative to carry out a thorough investigation that characterizes the safe operation of LICs. We investigated and studied the safety of LIC for commercial applications, by conducting a comprehensive abuse tests on LIC 200 F pouch cells with voltage range from 3.8 V to 2.2 V manufactured by General Capacitors LLC. The abuse tests include overcharge, external short circuit, crush (flat metal plate and blunt indentation), nail penetration test, and external heat test.
26
Burke, Andrew F., and Jingyuan Zhao. "Development, Performance, and Vehicle Applications of High Energy Density Electrochemical Capacitors." Applied Sciences 12, no. 3 (February 8, 2022): 1726. http://dx.doi.org/10.3390/app12031726.
Full textAbstract:
This paper is concerned with the development and performance of high-energy density electrochemical supercapacitors (ECCs) and their application in HEVs, PHEVs, and HFCVs. Detailed test data are shown for the Skeleton Technology 5000 F carbon/carbon EDLC device and the Aowei 9000 F hybrid (4 V) supercapacitor (HSC). The EDLC device had an energy density of 8.4 Wh/kg and the hybrid SC had an energy density between 30 and 65, depending on its rated voltage and the power of the discharge. These energy densities are significantly higher than previous ECCs tested. They indicate that good progress is being made in increasing the energy density of commercial ECCs. Vehicle applications of the advanced ECCs were evaluated based on Advisor simulations on city and highway driving cycles. Simulations were made for six vehicle types ranging from compact passenger cars to Class 8 long haul trucks. The fuel economy was calculated for each vehicle type using a lithium battery, the EDLC Skeleton Technology capacitor and the two Aowei hybrid capacitors as energy storage in the powertrain. The 4.1 V hybrid capacitor in all cases was lighter and smaller than the lithium battery. The fuel economies of the HEVs on the FUDS cycle were significantly higher (30–50%) than that of the corresponding ICE vehicle, except for the long haul truck, for which the fuel economy improvement was 20%. In almost all cases, the fuel economy improvement was highest when using the 4.1 V hybrid capacitor. Simulations were also run for fuel cell-powered vehicles. For the fuel cell vehicles, the fuel economies using the three energy storage technologies varied only slightly. For all the fuel cell vehicles simulated, the 4.1 V hybrid capacitor was the lightest and smallest of the energy storage options, and produced the best fuel economy. As in the case of HEVs, the hybrid capacitors appeared to be the best option for energy storage in fuel cell vehicle applications.
27
Gizatullin, Farit A., Zulfiya G. Gabidullina, and Andrey V. Lobanov. "RESONANCE PHENOMENA IN AIRCRAFT ENGINE IGNITION SYSTEMS." ELECTRICAL AND DATA PROCESSING FACILITIES AND SYSTEMS 19, no. 2 (2023): 7–15. http://dx.doi.org/10.17122/1999-5458-2023-19-2-7-15.
Full textAbstract:
The relevance An analysis of scientific and technical literature in the field of development and research of aircraft engine ignition systems shows that the manifestations of resonant processes in nonlinear discharge circuits of capacitive ignition systems in the presence of two energy storage devices - a storage capacitor and an inductor coil have not been studied with the issuance of recommendations for matching the parameters of energy storage devices. This problem is of significant practical interest from the point of view of optimizing the parameters of the discharge circuits, increasing the energy efficiency and igniting ability of ignition systems. Aim of research Revealing the possibilities of increasing the efficiency of capacitive ignition systems based on the use of the manifestation of resonant processes in nonlinear discharge circuits containing two energy storage devices. Research methods Studies have been carried out involving a theoretical description of the processes during the discharge of the former charged capacitor to the R-L circuit, followed by experimental confirmation of the assumptions of the alleged states, described with the alleged resonance of occurrence in the discharge circuit using a similar falling current-voltage characteristic. Results The manifestations of resonant phenomena in a capacitive ignition system during the discharge of a capacitor on a non-linear circuit R-L are investigated. It is theoretically substantiated and experimentally proved that the dependences of the voltage in the spark discharge, the current and the energy of the discharges on the capacitance of the storage capacitor at a fixed inductance of the discharge circuit are uneven with inflection points corresponding to the equality of the inductive and capacitive resistances. It is shown that the energy efficiency of the discharge circuit can remain practically unchanged with a more than 1.5-fold decrease in the capacitance of the storage capacitor in the region of manifestation of resonant processes. The results obtained make it possible to coordinate the parameters of capacitive ignition systems, to determine the optimal values of the inductance of the discharge circuits for a given value of the capacitance of storage capacitors to ensure maximum energy efficiency and igniting capacity.
28
Tang, Enling, Li Wang, Ruizhi Wang, Yafei Han, Xiaochu Lin, Guowen Gao, Liping He, Shenghai Xiang, and Meng Wang. "Influence of the Storage Energy Capacitance on Their Electrical Output Characteristics of Piezoelectric Ceramic during the Process of High-Velocity Impact." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 36, no. 5 (October 2018): 949–54. http://dx.doi.org/10.1051/jnwpu/20183650949.
Full textAbstract:
In order to reveal influence of external capacitance on the voltage input and input energy provided by the PZT-5H piezoelectric ceramic composite structure under high-speed impact loading, experiments have been performed by using one-stage light gas gun loading system combining with a power supplier circuit and power output testing system, which the aspect ratio of 1:1 column projectile impact monolithic and multi-piece piezoelectric ceramic composite structure at the near impact velocity and different storage capacity. The experimental results show that the more larger storage capacitance is, the smaller the piezoelectric ceramic output voltage is. However, the smaller of the capacitor voltage is, the smaller the value of energy storage is; with the energy storage capacitance increasing, the piezoelectric capacitance ratio and the energy conversion rate of piezoelectric ceramics decreases; In addition, the storage energy capacitor increases with the increasing of the piezoelectric ceramic layers; the relationships of storage energy capacitor and piezoelectric ceramic capacitor has a great influence on the input voltage and storage energy for storage energy capacitor.
29
Mendoza, Miguel, Md Ashiqur Rahaman Khan, Mohammad Arif Ishtiaque Shuvo, Alberto Guerrero, and Yirong Lin. "Development of Lead-Free Nanowire Composites for Energy Storage Applications." ISRN Nanomaterials 2012 (October 23, 2012): 1–8. http://dx.doi.org/10.5402/2012/151748.
Full textAbstract:
There is an increasing demand to improve the energy density of dielectric capacitors for satisfying the next generation material systems. One effective approach is to embed high dielectric constant inclusions such as lead zirconia titanate in polymer matrix. However, with the increasing concerns on environmental safety and biocompatibility, the need to expel lead (Pb) from modern electronics has been receiving more attention. Using high aspect ratio dielectric inclusions such as nanowires could lead to further enhancement of energy density. Therefore, this paper focuses on the development of a lead-free nanowire reinforced polymer matrix capacitor for energy storage application. Lead-free sodium niobate nanowires (NaNbO3) were synthesized using hydrothermal method, followed by mixing them with polyvinylidene fluoride (PVDF) matrix using a solution-casting method for nanocomposites fabrication. Capacitance and breakdown strength of the samples were measured to determine the energy density. The energy density of NaNbO3/PVDF composites was also compared with that of lead-containing (PbTiO3/PVDF) nanocomposites and previously developed Pb()O3/PVDF composites to show the feasibility of replacing lead-containing materials. The energy density of NaNbO3/PVDF capacitor is comparable to those of lead-containing ones, indicating the possibility of expelling lead from high-energy density dielectric capacitors.
30
Jiya, Immanuel Ninma, Nicoloy Gurusinghe, and Rupert Gouws. "Hybridisation of battery, supercapacitor and hybrid capacitor for load applications with high crest factors: a case study of electric vehicles." Indonesian Journal of Electrical Engineering and Computer Science 16, no. 2 (November 1, 2019): 614. http://dx.doi.org/10.11591/ijeecs.v16.i2.pp614-622.
Full textAbstract:
This paper proposes a novel topology of hybridizing battery, supercapacitor and hybrid capacitor for optimum utilization of energy in electric vehicles. Hybridization of energy storage has been the theme of much research in the field of power electronics as it is an effective economic solution towards improving the utilization of energy. Batteries have fallen short in comparison to both supercapacitors and hybrid capacitors because of their low power density and limited charge-discharge cycle. Most of the previous research in this field focuses on hybridizing either supercapacitor or hybrid capacitor with the battery but not both. This paper deals with the combination of both supercapacitor and hybrid capacitor with the battery thus addressing the problem of the lack of autonomy between two recharge points in supercapacitors, three hybridization techniques are considered and the balance point of the supercapacitor and hybrid capacitor banks is presented. The prospects of using a multiple-input DC-DC converter is also analyzed. An experimental electric vehicle profile was used to verify the proposed topology and the results are presented. The application of the novel hybridization of the three energy storage devices can be extended to other applications having a load profile with high crest factors.
31
Sharma, Pardeep Kumar, Cherry Bhargava, and Ketan Kotecha. "Sustainability Analysis of a ZnO-NaCl-Based Capacitor Using Accelerated Life Testing and an Intelligent Modeling Approach." Sustainability 13, no. 19 (September 27, 2021): 10736. http://dx.doi.org/10.3390/su131910736.
Full textAbstract:
From small toys to satellites, capacitors play a vital role as an energy storage element, filtering or controlling other critical tasks. This research paper focuses on estimating the remaining useful life of a nanocomposite-based fabricated capacitor using various experimental and artificial intelligence techniques. Accelerated life testing is used to explore the sustainability and remaining useful life of the fabricated capacitor. The acceleration factors affecting the health of capacitors are investigated, and experiments are designed using Taguchi’s approach. The remaining useful lifetime of the fabricated capacitor is calculated using a statistical technique, i.e., regression analysis using Minitab 18.1 software. An expert model is designed using artificial neural networks (ANN), which warns the user of any upcoming faults and failures. The average remaining useful life of the fabricated capacitor, using accelerated life testing, regression, and artificial neural network, is reported as 13,724.3 h, 14,515.9 h, and 14,247.1 h, respectively. A comparison analysis is conducted, and performance metrics are analyzed to opt for the most efficient technique for the prediction of the remaining useful life of the fabricated capacitor, which confirms 93.83% accuracy using the statistical method and 95.82% accuracy using artificial neural networks. The root mean square error (RMSE) of regression and artificial neural networks is found to be 0.102 and 0.167, respectively, which validates the consistency of the reliability methods.
32
Guo, Yong Feng, Ji Cheng Bai, Li Qing Li, and Cheng Jun Li. "Study on Surface Performance of Carbon-Aluminum-Carbon Electrode of Super-Capacitor in Dry WEDM." Key Engineering Materials 375-376 (March 2008): 401–5. http://dx.doi.org/10.4028/www.scientific.net/kem.375-376.401.
Full textAbstract:
Super-capacitors are new equipments for energy storage，and they have wide application in practice. At present, blanking is used to machining the electrodes of super-capacitor; however, the disadvantages of the method are burrs, electrode collapse. A new method processing electrode of super-capacitor, wire electrical discharge machining in gas (dry WEDM), were presented in this paper, and the electrode surface morphologies were studied utilizing scan electron microscope (SEM). First, the surface morphologies comparison studies of super-capacitor electrodes processed with different method, such as shearing, blanking and dry WEDM etc., were performed, and research results show that the super-capacitor electrode surfaces machined by dry WEDM achieve flat machining surface, and electrode edges do not collapse. Further surface morphology analysis was carried out based on different pulse durations and air pressure, and analysis results indicate that better machining surface can be achieved when suitable pulse duration and gas pressure are selected. Finally, surface energy spectrum analysis of the super-capacitor electrode processed by dry WEDM is performed, and the analysis result show that alumina are formed on the middle of electrode, aluminum foil, which is favored to the performance of super-capacitor.
33
Guo, Yun Bo, and Deng Chao Feng. "The Application of Super Capacitor in Scenery Generator Energy Storage System." Advanced Materials Research 608-609 (December 2012): 1062–65. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.1062.
Full textAbstract:
Based on the comparison of battery energy storage system, super capacitor energy storage system, superconducting storage system, flywheel energy storage system, hybrid energy storage system composed by battery and super capacitor is proposed. By Analysis the performance of the system, it can be know that the system has characteristics of high specific power and high specific energy, and the battery and super capacitor device can be flexibly configured, which make energy storage system performance greatly improved. This template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.
34
Al-Wesabi, Ibrahim, Zhijian Fang, Zhiguo Wei, and Hanlin Dong. "Direct Sliding Mode Control for Dynamic Instabilities in DC-Link Voltage of Standalone Photovoltaic Systems with a Small Capacitor." Electronics 11, no. 1 (January 1, 2022): 133. http://dx.doi.org/10.3390/electronics11010133.
Full textAbstract:
Large electrolytic capacitors used in grid-connected and stand-alone photovoltaic (PV) applications for power decoupling purposes are unreliable because of their short lifetime. Film capacitors can be used instead of electrolytic capacitors if the energy storage requirement of the power conditioning units (PCUs) is reduced, since they offer better reliability and have a longer lifetime. Film capacitors have a lower capacitance than electrolytic capacitors, causing enormous frequency ripples on the DC-link voltage and affecting the standalone photovoltaic system’s dynamic performance. This research provided novel direct sliding mode controllers (DSMCs) for minimizing DC-link capacitor, regulating various components of the PV/BES system that assists to manage the DC-link voltage with a small capacitor. DSMCs were combined with the perturb and observe (P&O) method for DC boost converters to increase the photovoltaic system’s dynamic performance, and regulate the battery’s bidirectional converter (BDC) to overcome the DC-link voltage instabilities caused via a lower DC-link capacitor. The system is intended to power both AC and DC loads in places without grid connection. The system’s functions are divided into four modes, dependent on energy supply and demand, and the battery’s state of charge. The findings illustrate the controllers’ durability and the system’s outstanding performance. The testing was carried out on the MT real-time control platform NI PXIE-1071 utilizing Hardware-In-The-Loop experiments and MATLAB/Simulink.
35
Jongprateep, Oratai, Tunchanoke Khongnakhon, and Jednupong Palomas. "Composition-Microstructure-Property Relationships in BaTiO3 with Mg Addition." Key Engineering Materials 659 (August 2015): 58–63. http://dx.doi.org/10.4028/www.scientific.net/kem.659.58.
Full textAbstract:
Rising worldwide demands for energy encourages development of high-efficiency energy storage and capacitor components. Main requirements for dielectric materials employed in fabrication of high energy density capacitors include high dielectric constant, high dielectric breakdown strength, and low dielectric loss. Owing to its high dielectric constant and low dielectric loss [1], barium titanate is among common capacitor materials. Tailoring of dielectric properties of barium titanate can be achieved through controlled chemical composition, microstructure, and crystal structure. Synthesis and processing techniques, as well as doping of barium titanate, can be key factors to control the composition and structure, which consequently contribute to enhancement of dielectric constant in the material.
36
El Khlifi, Younes, Abdelmounime El Magri, Adil Mansouri, and Rachid Lajouad. "Enhanced low voltage ride-through control of multilevel flying capacitor inverter based wind generation." Indonesian Journal of Electrical Engineering and Computer Science 33, no. 2 (February 1, 2024): 854. http://dx.doi.org/10.11591/ijeecs.v33.i2.pp854-861.
Full textAbstract:
This paper introduces a cost-effective control method to enhance the low voltage ride-through (LVRT) capability and smooth the output power of a three-phase multilevel flying capacitor inverter (FCI) in wind turbine-based permanent magnet synchronous generator (PMSG). The proposed approach utilizes the energy storage capability of flying capacitors to mitigate wind power fluctuations and address short-duration outages and deep voltage sags. Additionally, a nonlinear controller based Lyapunov theory is developed to regulate capacitor voltages, improve power factors, and balance DC-link voltage. Numerical simulations are conducted in MATLAB/SimPower systems environment to validate the effectiveness of this comprehensive control strategy across different grid operation scenarios.
37
Munir, Bilal, and Vladimir Dyo. "On the Impact of Mobility on Battery-Less RF Energy Harvesting System Performance." Sensors 18, no. 11 (October 23, 2018): 3597. http://dx.doi.org/10.3390/s18113597.
Full textAbstract:
The future of Internet of Things (IoT) envisions billions of sensors integrated with the physical environment. At the same time, recharging and replacing batteries on this infrastructure could result not only in high maintenance costs, but also large amounts of toxic waste due to the need to dispose of old batteries. Recently, battery-free sensor platforms have been developed that use supercapacitors as energy storage, promising maintenance-free and perpetual sensor operation. While prior work focused on supercapacitor characterization, modelling and supercapacitor-aware scheduling, the impact of mobility on capacitor charging and overall sensor application performance has been largely ignored. We show that supercapacitor size is critical for mobile system performance and that selecting an optimal value is not trivial: small capacitors charge quickly and enable the node to operate in low energy environments, but cannot support intensive tasks such as communication or reprogramming; increasing the capacitor size, on the other hand, enables the support for energy-intensive tasks, but may prevent the node from booting at all if the node navigates in a low energy area. The paper investigates this problem and proposes a hybrid storage solution that uses an adaptive learning algorithm to predict the amount of available ambient energy and dynamically switch between two capacitors depending on the environment. The evaluation based on extensive simulations and prototype measurements showed up to 40% and 80% improvement compared to a fixed-capacitor approach in terms of the amount of harvested energy and sensor coverage.
38
He, Yuli, Guang Zheng, Bao Zhu, Xiaohan Wu, Wen-Jun Liu, David Wei Zhang, and Shi-Jin Ding. "High Performance On-Chip Energy Storage Capacitors with Plasma-Enhanced Atomic Layer-Deposited Hf0.5Zr0.5O2/Al-Doped Hf0.25Zr0.75O2 Nanofilms as Dielectrics." Nanomaterials 13, no. 11 (May 30, 2023): 1765. http://dx.doi.org/10.3390/nano13111765.
Full textAbstract:
Concurrently achieving high energy storage density (ESD) and efficiency has always been a big challenge for electrostatic energy storage capacitors. In this study, we successfully fabricate high-performance energy storage capacitors by using antiferroelectric (AFE) Al-doped Hf0.25Zr0.75O2 (HfZrO:Al) dielectrics together with an ultrathin (1 nm) Hf0.5Zr0.5O2 underlying layer. By optimizing the Al concentration in the AFE layer with the help of accurate controllability of the atomic layer deposition technique, an ultrahigh ESD of 81.4 J cm−3 and a perfect energy storage efficiency (ESE) of 82.9% are simultaneously achieved for the first time in the case of the Al/(Hf + Zr) ratio of 1/16. Meanwhile, both the ESD and ESE exhibit excellent electric field cycling endurance within 109 cycles under 5~5.5 MV cm−1, and robust thermal stability up to 200 °C. Thus, the fabricated capacitor is very promising for on-chip energy storage applications due to favorable integratability with the standard complementary metal–oxide–semiconductor (CMOS) process.
39
Huang, Zhaodong, Rong Zhang, Shaoce Zhang, Pei Li, Chuan Li, and Chunyi Zhi. "Recent advances and future perspectives for aqueous zinc-ion capacitors." Materials Futures 1, no. 2 (February 24, 2022): 022101. http://dx.doi.org/10.1088/2752-5724/ac4263.
Full textAbstract:
Abstract Ion-hybrid capacitors are expected to combine the high specific energy of battery-type materials and the superior specific power of capacitor-type materials and are considered as a promising energy storage technique. In particular, aqueous zinc-ion capacitors (ZIC), possessing the merits of high safety, cost-efficiency and eco-friendliness, have been widely explored with various electrode materials and electrolytes to obtain excellent electrochemical performance. In this review, we first summarize the research progress on enhancing the specific capacitance of capacitor-type materials and review the research on improving the cycling capability of battery-type materials under high current densities. Then, we look back on the effects of electrolyte engineering on the electrochemical performance of ZIC. Finally, we propose research challenges and development directions for ZIC. This review provides guidance for the design and construction of high-performance ZIC.
40
Thirumal, Vediyappan, Palanisamy Rajkumar, Kisoo Yoo, and Jinho Kim. "Hydrothermal Synthesis of Boron-Doped Graphene for High-Performance Zinc-Ion Hybrid Capacitor Using Aloe Vera Gel Electrolyte." Inorganics 11, no. 7 (June 29, 2023): 280. http://dx.doi.org/10.3390/inorganics11070280.
Full textAbstract:
The great interest in developing emerging zinc-ion capacitors (ZIC) for energy storage applications is due to their inexpensiveness and the future necessity for hybrid electrical energy storage devices. The Zn-ion hybrid capacitor device was assembled using boron (B)-doped reduced graphene oxide (B-RGO) material, which acts as the cathode, and pure zinc metal as an anode. This research work aims to study the influence of B-doped reduced graphene oxide (B-RGO) with Aloe vera gel as an electrolyte. The reduced graphene oxide (RGO) and B-RGO electrode active materials were confirmed through X-ray diffraction (XRD), RAMAN, Fourier transformation infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM) and field emission-transmission electron microscopy (FE-TEM) analysis. The surface morphological images reveal that a few-layered nanostructure B-RGO was used in the Zn-ion hybrid capacitor device. The electrochemical performance of the Zn-ion hybrid capacitor was evaluated through cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) measurements, with a wide active potential range of 0–2 V versus Zn/Zn+. The mixture composition of Aloe vera extract and 1M ZnSO4 electrolyte generated a stable voltage and exhibited good capacitive behavior. The fabricated ZIC coin cell device with the Aloe vera gel semi-gel electrolyte containing ZnSO4 demonstrated improved Zn+ ionic exchange and storage efficiency. Moreover, the B-RGO electrode active material exhibited excellent cycle stability. The simple one-step electrochemical technique is the most suitable process for boron doping into graphene nanosheets for future energy storage applications.
41
Lee, Jong-Kyu, and Jung-Rag Yoon. "Effect of Electric Properties according to Volume Ratio of Supercapacitor and Battery Capacitor in Hybrid Energy Storage System." Coatings 13, no. 8 (July 27, 2023): 1316. http://dx.doi.org/10.3390/coatings13081316.
Full textAbstract:
The development of technology that combines supercapacitors and lithium-ion batteries by externally connecting them in parallel is ongoing. This study examines the correlation between the volume ratio and electrical characteristics of a cell made by internally connecting a battery capacitor with Li4Ti5O12 as the anode active material and a supercapacitor in parallel. It was found that increasing the volume occupied by the battery capacitor in the cell led to increased cell energy and resistance, resulting in decreased output characteristics. Conversely, increasing the volume occupied by the supercapacitor in the cell led to a decrease in the IR drop during discharge and the cell temperature when evaluating cycle characteristics with a current of 20C. This study also examined the behavior of the current distributed during the charging and discharging process based on the volume ratio of the supercapacitor and the battery capacitor. Analyzing the correlation between the volume ratio and electrical characteristics of supercapacitors and battery capacitors could potentially lead to the development of a new type of energy storage device.
42
Vaidya, P., and V. K. Chandrakar. "Exploring the Enhanced Performance of a Static Synchronous Compensator with a Super-Capacitor in Power Networks." Engineering, Technology & Applied Science Research 12, no. 6 (December 15, 2022): 9703–8. http://dx.doi.org/10.48084/etasr.5317.
Full textAbstract:
The use of a super-capacitor as a storage device integrated with a Voltage source converter-based shunt-connected Static Synchronous Compensator (STATCOM) is proposed for improving the STATCOM performance during sudden large disturbances in a power network. The super-capacitor was applied across the STATCOM capacitor during the disturbance condition. MATLAB simulations were carried out for the verification of a secondary function of the STATCOM like oscillation damping, transient stability improvement, and security of the power network with the storage device. The validation of the proposed super-capacitor was carried out in MATLAB.
43
Nikitin, Victor V., Gennady E. Sereda, Eugene G. Sereda, and Alexander G. Sereda. "Experimental studies of charge of non-superconductive magnetic energy storage." Transportation systems and technology 2, no. 1 (December 15, 2016): 126–35. http://dx.doi.org/10.17816/transsyst201621126-135.
Full textAbstract:
One of the urgent tasks of railway transport development connected with the problem of power saving according to “The strategic directions of scientific and technical development of OAO RZD for the period of up to 2015” is a wide use of power-intensive energy storages in the main technological processes of power consumption and energy generation. Owing to the progress in the field of manufacturing high temperature superconductors of the second generation, the use of superconducting magnetic energy storages (SMES) is the most promising. A feature of induction coils, which are inductive energy storage as receivers and sources, according to the laws of commutation is inability to change current quickly through induction. This makes difficult to connect superconducting magnet directly to energy sources and receivers of traditional performance. This means that SMES require special charging circuits. The most viable is to charge coil via intermediate capacitor (capacitance storage (CS)). In this case, coil charge will be on phased basis, taking character of pulse pump of energy. The advantages of this modification are that energy source released from handling large, slowly varying currents, resulting in possibility to flexibly adjust magnitude and duration of coil charge depending on the required charging mode. To verify that the scheme of charging inductive energy storage via intermediate capacitor non-superconductive magnetic energy storage which, unlike superconductive has a finite resistance, has been used. The authors confirmed working capacity of charging scheme for inductive energy storage via intermediate capacitor on phased basis. It is noted that maximum current value during charge of CS increases with capacitance value of the intermediate storage and with decreasing series included with CS inductance.
44
Ma, Tao, Junyong Lu, Xiao Zhang, Bofeng Zhu, Wenxuan Wu, and Xinlin Long. "Modeling and Design Optimization of Energy Transfer Rate for Hybrid Energy Storage System in Electromagnetic Launch." Energies 15, no. 3 (January 18, 2022): 695. http://dx.doi.org/10.3390/en15030695.
Full textAbstract:
The battery-pulse capacitor-based hybrid energy storage system has the advantage of high-energy density and high-power density. However, to achieve a higher firing rate of the electromagnetic launch, a shorter charging time of the pulse capacitor from the battery is needed. A new optimization model by formulating the charging time problem as a constrained optimization problem is presented. Unlike existing algorithms, the proposed model can find the globally optimal solution. The circuit parameters are optimized through the Enumeration algorithm to minimize the total charging time of the pulse capacitors from batteries. The simulation results show that the charging time of the proposed algorithm is shorter than the compared methods. Furthermore, a better solution could be obtained by canceling the constraint on the first peak of the charging current of the compared methods, which makes the circuit design more flexible for the hybrid energy storage system in the electromagnetic launch.
45
Kubendran, V., Y. Mohamed Shuaib, and J. Preetha Roselyn. "Modelling of Vehicle Dynamics and Determination of Energy Demand for Electric Vehicle." Journal of Physics: Conference Series 2335, no. 1 (September 1, 2022): 012049. http://dx.doi.org/10.1088/1742-6596/2335/1/012049.
Full textAbstract:
Abstract The WLTP Class 3 driving cycle is used in this article for the design of a battery and super-capacitor for electric vehicles. The energy demand for electric vehicle is calculated using WLTP drive cycle and the total power required for electric vehicle is calculated by calculating tractive force. A hybrid energy storage system (HESS) overcomes numerous shortcomings of a battery energy storage system (BESS), including reduced battery life, limited power density, etc. In a proposed system, a Li-Ion battery is coupled with a super-capacitor/Ultra-capacitor as a bidirectional converter, where the Li-Ion battery is the primary energy source, while the Super Capacitor/Ultra-capacitor is an auxiliary energy source. The range of battery and Super Capacitor/ultra-capacitor sizes for Tata Nixon 2020 are calculated and simulated using the MATLAB/SIMULINK environment to verify the efficiency and effectiveness of the proposed model.
46
Chen, Ming Xuan, Yong Feng Ren, He Bu, Zhi Qiang Gao, and Shao Hua Xu. "Research on Control Strategy of Triple Bi-Directional DC/DC Converter." Applied Mechanics and Materials 457-458 (October 2013): 806–10. http://dx.doi.org/10.4028/www.scientific.net/amm.457-458.806.
Full textAbstract:
The bidirectional DC/DC converter is an important part for the power energy storage system,this paper adopts a triple bidirectional DC/DC converter in view of the features on super capacitor energy storage wide output voltage range. Establish the switch average model of bidirectional DC/DC equivalent model, put forward a double close-loop control strategy in view of charge and discharge conditions of the super capacitor, the triple bidirectional DC/DC simulation model based on super capacitor is built. The simulation results show that, the triple bidirectional DC/DC converter can effectively reduce the inductive current and current stress demand of the switch devices, improve the converter power grade. The control strategy can effectively control the super capacitor charge and discharge and it is suitable for application in the power energy storage system.
47
Zhao, Kuo, Yi Bin Zhang, and Bo Yu. "The Series and Parallel Energy Storage System Based on Super Capacitors." Advanced Materials Research 989-994 (July 2014): 2820–24. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.2820.
Full textAbstract:
The series and parallel energy storage system based on super capacitors can quickly adjust a wide range of active and reactive power in two directions, which is a new way to improve the stability and power quality of new energy power generation system. In this paper, double converters structure is used to achieve the series and parallel compensation effect and their control strategies according to Instantaneous Power Theory. It is simulated in PSCAD that series and parallel energy storage system of super capacitor contribute to the impact on wind turbines power as environment conditions change. Simulation results show that the energy storage system can greatly improve the stability and power quality of grid-connected wind turbines.
48
Misto, Siswanto, Tri Mulyono, Sutisna, and Dela Dwi Alawiyah. "Booster Circuit for Harvesting Renewable Energy Based on Bioelectric Microbial Fuel Cells Whose Power Can Be Adjusted." BIO Web of Conferences 101 (2024): 01006. http://dx.doi.org/10.1051/bioconf/202410101006.
Full textAbstract:
Microbial fuel cells (MFCs) represent a promising technology that converts organic waste into electrical energy through bacterial activity. The process involves capturing a low voltage of approximately 0.4 V generated by the MFC using a small capacitor, which is then stored and transferred to a larger capacitor to increase the capacity. In order for this energy to be used for general AC-powered devices, an inverter is essential to convert the DC output to AC. This system, consisting of a series of capacitors and inverters, along with voltage dampers and rectifiers, forms a circuit that can potentially function as an efficient low-power generator. The effectiveness of this arrangement remains to be tested, which will determine its viability as a renewable energy storage solution.
49
Ibrahim, Tarek, Tamas Kerekes, Dezso Sera, Shahrzad S. Mohammadshahi, and Daniel-Ioan Stroe. "Sizing of Hybrid Supercapacitors and Lithium-Ion Batteries for Green Hydrogen Production from PV in the Australian Climate." Energies 16, no. 5 (February 22, 2023): 2122. http://dx.doi.org/10.3390/en16052122.
Full textAbstract:
Instead of storing the energy produced by photovoltaic panels in batteries for later use to power electric loads, green hydrogen can also be produced and used in transportation, heating, and as a natural gas alternative. Green hydrogen is produced in a process called electrolysis. Generally, the electrolyser can generate hydrogen from a fluctuating power supply such as renewables. However, due to the startup time of the electrolyser and electrolyser degradation accelerated by multiple shutdowns, an idle mode is required. When in idle mode, the electrolyser uses 10% of the rated electrolyser load. An energy management system (EMS) shall be applied, where a storage technology such as a lithium-ion capacitor or lithium-ion battery is used. This paper uses a state-machine EMS of PV microgrid for green hydrogen production and energy storage to manage the hydrogen production during the morning from solar power and in the night using the stored energy in the energy storage, which is sized for different scenarios using a lithium-ion capacitor and lithium-ion battery. The mission profile and life expectancy of the lithium-ion capacitor and lithium-ion battery are evaluated considering the system’s local irradiance and temperature conditions in the Australian climate. A tradeoff between storage size and cutoffs of hydrogen production as variables of the cost function is evaluated for different scenarios. The lithium-ion capacitor and lithium-ion battery are compared for each tested scenario for an optimum lifetime. It was found that a lithium-ion battery on average is 140% oversized compared to a lithium-ion capacitor, but a lithium-ion capacitor has a smaller remaining capacity of 80.2% after ten years of operation due to its higher calendar aging, while LiB has 86%. It was also noticed that LiB is more affected by cycling aging while LiC is affected by calendar aging. However, the average internal resistance after 10 years for the lithium-ion capacitor is 264% of the initial internal resistance, while for lithium-ion battery is 346%, making lithium-ion capacitor a better candidate for energy storage if it is used for grid regulation, as it requires maintaining a lower internal resistance over the lifetime of the storage.
50
Li, Junda, Zhenbin Zhang, and Xinliang Yang. "A novel model predictive control strategy of D-PMSG wind turbine systems for LVRT based on two-state unloading resistance and super capacitor." Journal of Physics: Conference Series 2418, no. 1 (February 1, 2023): 012048. http://dx.doi.org/10.1088/1742-6596/2418/1/012048.
Full textAbstract:
Abstract For low voltage ride through (LVRT) of the wind power generation system, rotor energy storage and super capacitor are promising options. When the rotor energy storage cooperates with the super capacitor for LVRT, the DC voltage will undulate violently due to the speed fluctuation. To solve this problem, a crowbar circuit topology and its control strategy including unloading resistance and super capacitor are proposed in this paper. During the process of LVRT, the super capacitor and resistor absorb energies together. In doing so, the DC bus voltage fluctuation will be suppressed by changing the value of the unloading resistance. The proposed method can effectively reduce the power of the unloading resistor and the capacity of super capacitor, and further decrease the hardware cost. By adding the penalty term of the current change rate to the cost function using the model predictive control method (MPC), the DC bus voltage fluctuation is reduced with the realization of rotor energy storage. The control performances of the proposed LVRT strategy are validated through simulation results.