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Journal articles on the topic 'Cobalt sulfide-graphene composites'

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Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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1

Ramachandran, R., Grace A. Nirmala, and Chittur K. Subramaniam. "Cobalt Sulfide-Graphene (CoSG) Composite based Electrochemical Double Layer Capacitors." MRS Proceedings 1786 (2015): 19–30. http://dx.doi.org/10.1557/opl.2015.784.

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ABSTRACTElectrochemical Double Layer Capacitors, EDLC, using Cobalt sulfide- Graphene (CoSG) composite electrodes, were fabricated and the storage process was studied. CoSG composite was prepared by a simple chemical route. X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA) and Field Emission Scanning Electron microscopy (FESEM) were used to characterized the as prepared composites which indicated formation of Co S phase. Solutions of perfluorosulfonic acid and Polyvinylidene Fluoride (PVDF) were used as electrode binding material. The storage capacitance of the composites were studied in 1M KCl and 6M KOH electrolytes using standard electrochemical techniques like cyclic voltammetry, CV, electrochemical impedance spectroscopy, EIS, and discharge profiles. The capacitance was estimated for various binder concentrations for both the electrolytes. The concentration of perflurosulfonic acid binder of 0.8 wt% and PVDF of 0.04 wt% showed optimized specific capacitances of 657.8 F/gm and 1418.8 F/g, respectively. Some of the problems in storage density in activated carbon, like varying micro or meso pores, poor ion mobility due to varying pore distribution, low electrical conductivity, can be overcome by using Graphene and composites of Graphene. Graphene in various structural nomenclatures have been used by different groups for charge storage. Optimization of the electrode structure in terms of blend percentage, binder content and interface character in the frequency and time domain provides insights to the double layer interface structure.
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2

Dai, Kai, Dongpei Li, Luhua Lu, Qi Liu, Jiali Lv, and Guangping Zhu. "Facile synthesis of a reduced graphene oxide/cobalt sulfide hybrid and its electrochemical capacitance performance." RSC Adv. 4, no. 55 (2014): 29216–22. http://dx.doi.org/10.1039/c4ra04103h.

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Reduced graphene oxide (RGO) in situ composites with cobalt sulfide (CoS) are achieved through a facile hydrothermal approach, and RGO/CoS presents a high specific capacitance of 1130 F g−1.
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3

Thanh Tam, Le Thi, Doan Thanh Tung, Ha Minh Nguyet, Nguyen Thi Ngoc Linh, Ngo Thanh Dung, Nguyen Van Quynh, Nguyen Van Dang, et al. "High electrochemical performance of ink solution based on manganese cobalt sulfide/reduced graphene oxide nano-composites for supercapacitor electrode materials." RSC Advances 12, no. 31 (2022): 20182–90. http://dx.doi.org/10.1039/d2ra02818b.

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Large scale supercapacitor electrodes were prepared by 3D-printing directly on a graphite paper substrate from ink solution containing manganese cobalt sulfide/reduced graphene oxide (MCS/rGO) nanocomposites.
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4

Zhao, Shi Huai, Wen Wen Xu, Xiao Ming Zhao, and Zi Bo Yang. "Preparation and Capacitance Properties of Nickel-Cobalt Sulfide/Graphene Composites." Materials Science Forum 956 (June 2019): 35–45. http://dx.doi.org/10.4028/www.scientific.net/msf.956.35.

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In order to explore the supercapacitor electrode material with high energy density, a composite material that nickel-cobalt sulfide loaded in graphene (NiCo2S4@rGO) with core-shell structure was successfully prepared by hydrothermal, room temperature vulcanization and annealing. The core-shell structure of the material greatly increased the contact area between the material and the electrolyte and improved the electrochemical performance. In addition, the energy density has been significantly improved. NiCo2S4@rGO was characterized by field emission scanning electron microscopy (SEM), high-resolution transmission electron microscope (HRTEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and Raman spectrometer. The electrochemical properties of the material were evaluated by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). The results show that the capacitance can reach 1100 F/g at the current density of 0.5 A/g. Furthermore, the NiCo2S4@rGO as positive electrode and reduced graphene oxide (rGO) as negative electrode were assembled into an asymmetric supercapacitor (ASC). The device exhibits a high energy density of 74.78 Wh/Kg at a power density of 400 W/Kg, as well as excellent cycling stability of 88.9% after 3 000 cycles, which reflects the excellent electrochemical performance of the material.
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5

Tiwari, Santosh K., Anukul K. Thakur, Amrita De Adhikari, Yanqiu Zhu, and Nannan Wang. "Current Research of Graphene-Based Nanocomposites and Their Application for Supercapacitors." Nanomaterials 10, no. 10 (October 16, 2020): 2046. http://dx.doi.org/10.3390/nano10102046.

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This review acmes the latest developments of composites of metal oxides/sulfide comprising of graphene and its analogues as electrode materials in the construction of the next generation of supercapacitors (SCs). SCs have become an indispensable device of energy-storage modes. A prompt increase in the number of scientific accomplishments in this field, including publications, patents, and device fabrication, has evidenced the immense attention they have attracted from scientific communities. These efforts have resulted in rapid advancements in the field of SCs, focusing on the development of electrode materials with features of high performance, economic viability, and robustness. It has been demonstrated that carbon-based electrode materials mixed with metal oxides and sulfoxides can perform extremely well in terms of energy density, durability, and exceptional cyclic stability. Herein, the state-of-the-art technologies relevant to the fabrication, characterization, and property assessment of graphene-based SCs are discussed in detail, especially for the composite forms when mixing with metal sulfide, metal oxides, metal foams, and nanohybrids. Effective synthetic methodologies for the nanocomposite fabrications via intercalation, coating, wrapping, and covalent interactions will be reviewed. We will first introduce some fundamental aspects of SCs, and briefly highlight the impact of graphene-based nanostructures on the basic principle of SCs, and then the recent progress in graphene-based electrodes, electrolytes, and all-solid-state SCs will be covered. The important surface properties of the metal oxides/sulfides electrode materials (nickel oxide, nickel sulfide, molybdenum oxide, ruthenium oxides, stannous oxide, nickel-cobalt sulfide manganese oxides, multiferroic materials like BaMnF, core-shell materials, etc.) will be described in each section as per requirement. Finally, we will show that composites of graphene-based electrodes are promising for the construction of the next generation of high performance, robust SCs that hold the prospects for practical applications.
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6

Wang, Yang, Jing Tang, Biao Kong, Dingsi Jia, Yuhang Wang, Tiance An, Lijuan Zhang, and Gengfeng Zheng. "Freestanding 3D graphene/cobalt sulfide composites for supercapacitors and hydrogen evolution reaction." RSC Advances 5, no. 9 (2015): 6886–91. http://dx.doi.org/10.1039/c4ra15912h.

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7

Hazarika, Ankita, Biplab K. Deka, DoYoung Kim, Hyung Doh Roh, Young-Bin Park, and Hyung Wook Park. "Fabrication and Synthesis of Highly Ordered Nickel Cobalt Sulfide Nanowire-Grown Woven Kevlar Fiber/Reduced Graphene Oxide/Polyester Composites." ACS Applied Materials & Interfaces 9, no. 41 (October 6, 2017): 36311–19. http://dx.doi.org/10.1021/acsami.7b11712.

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8

Wang, Nan, Ligui Li, Dengke Zhao, Xiongwu Kang, Zhenghua Tang, and Shaowei Chen. "Graphene Composites with Cobalt Sulfide: Efficient Trifunctional Electrocatalysts for Oxygen Reversible Catalysis and Hydrogen Production in the Same Electrolyte." Small 13, no. 33 (July 10, 2017): 1701025. http://dx.doi.org/10.1002/smll.201701025.

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9

Huang, Jing, Xuekun Tang, Zishun Li, and Kun Liu. "Metal organic frameworks derived cobalt sulfide/reduced graphene oxide composites with fast reaction kinetic and excellent structural stability for sodium storage." Journal of Colloid and Interface Science 532 (December 2018): 407–15. http://dx.doi.org/10.1016/j.jcis.2018.08.002.

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10

Yu, Kaifeng, Jinyang Wang, Xiaofeng Wang, Yi Li, and Ce Liang. "Zinc–cobalt bimetallic sulfide anchored on the surface of reduced graphene oxide used as anode for lithium ion battery." Journal of Solid State Chemistry 290 (October 2020): 121619. http://dx.doi.org/10.1016/j.jssc.2020.121619.

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11

Cui, Yuhan, Chunyan Zhao, Lijie Zhao, Xiaohong Zhang, and Jianxin Wang. "Preparation of porous layered cobalt-zinc sulfide nanostructures based on graphene oxide supported ZIF-8 template for high-performance supercapacitors." Journal of Solid State Chemistry 316 (December 2022): 123581. http://dx.doi.org/10.1016/j.jssc.2022.123581.

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12

Jana, Milan, Pranab Samanta, Naresh Chandra Murmu, Nam Hoon Kim, Tapas Kuila, and Joong Hee Lee. "Development of Cobalt Sulfide-graphene Composite for Supercapacitor Applications." Composites Research 29, no. 4 (August 31, 2016): 167–72. http://dx.doi.org/10.7234/composres.2016.29.4.167.

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13

Meng, Xiaoqian, Huan Sun, Junwu Zhu, Huiping Bi, Qiaofeng Han, Xiaoheng Liu, and Xin Wang. "Graphene-based cobalt sulfide composite hydrogel with enhanced electrochemical properties for supercapacitors." New Journal of Chemistry 40, no. 3 (2016): 2843–49. http://dx.doi.org/10.1039/c5nj03423j.

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14

Heydari, Hamid, and Mohammad Bagher Gholivand. "Polyaniline/reduced graphene oxide–cobalt sulfide ternary composite for high-performance supercapacitors." Journal of Materials Science: Materials in Electronics 28, no. 4 (November 8, 2016): 3607–15. http://dx.doi.org/10.1007/s10854-016-5962-7.

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15

Ghosh, Souvik, Aparna Paul, Prakas Samanta, Bhau Landge, Sanjib Kumar Mandal, Sangam Sinha, Gour Gopal Dutta, Naresh Chandra Murmu, and Tapas Kuila. "Influence of Transition Metals (Cu and Co) on the Carbon-Coated Nickel Sulfide Used as Positive Electrode Material in Hybrid Supercapacitor Device." Journal of Composites Science 5, no. 7 (July 8, 2021): 180. http://dx.doi.org/10.3390/jcs5070180.

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Herein, a facile, environment-friendly and cost-effective approach was followed for the preparation of metal sulfide-based supercapacitor electrodes. The effect of transition metal interrogation on the morphology and electrochemical performance of carbon-coated nickel sulfide composite electrode was investigated. Physicochemical characterization showed that the enhancement in electrical conductivity and electrochemical reaction sites with the introduction of copper (Cu) and cobalt (Co) was due to the variation in morphology. Fast ionic transformation and improvement in the number of redox active sites might improve the supercapacitor performance. The electrochemical experiment showed that the NCoSC electrode exhibited the highest capacitance value of ~760 F g−1 at 2 A g−1 current density as compared to the NCuSC and NSC electrodes. Therefore, a hybrid supercapacitor (HSC) device was fabricated by using NCoSC as the positive electrode and thermally reduced graphene oxide (TRGO) as the negative electrode. The fabricated device demonstrated maximum energy density of ~38.8 Wh Kg−1 and power density of 9.8 kW Kg−1. The HSC device also showed ~89.5% retention in specific capacitance after 10,000 charge–discharge cycles at 12 A g−1 current density. So, the tuning of electronic and physical properties by the introduction of Cu and Co on nickel sulfide improved the supercapacitor performance.
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16

Qu, Baihua, Yuejiao Chen, Ming Zhang, Lingling Hu, Danni Lei, Bingan Lu, Qiuhong Li, Yanguo Wang, Libao Chen, and Taihong Wang. "β-Cobalt sulfide nanoparticles decorated graphene composite electrodes for high capacity and power supercapacitors." Nanoscale 4, no. 24 (2012): 7810. http://dx.doi.org/10.1039/c2nr31902k.

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17

Li, Zhangpeng, Wenyue Li, Hongtao Xue, Wenpei Kang, Xia Yang, Mingliang Sun, Yongbing Tang, and Chun-Sing Lee. "Facile fabrication and electrochemical properties of high-quality reduced graphene oxide/cobalt sulfide composite as anode material for lithium-ion batteries." RSC Adv. 4, no. 70 (2014): 37180–86. http://dx.doi.org/10.1039/c4ra06067a.

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18

Wu, Ping, Hai-Yan Hu, Ning Xie, Chen Wang, Fan Wu, Ming Pan, Hua-Fei Li, et al. "A N-doped graphene–cobalt nickel sulfide aerogel as a sulfur host for lithium–sulfur batteries." RSC Advances 9, no. 55 (2019): 32247–57. http://dx.doi.org/10.1039/c9ra05202j.

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Herein, three-dimensional (3D) N-doped reduced graphene oxide (N-rGO) nanosheets were decorated with a uniform distribution of Co–Ni–S (CNS) nanoparticles to form the CNS/N-rGO composite as a sulfur host material for lithium–sulfur batteries.
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19

Zhou, Qian, Li Liu, Guoxiong Guo, Zichao Yan, Jinli Tan, Zhifeng Huang, Xiaoying Chen, and Xianyou Wang. "Sandwich-like cobalt sulfide–graphene composite – an anode material with excellent electrochemical performance for sodium ion batteries." RSC Advances 5, no. 88 (2015): 71644–51. http://dx.doi.org/10.1039/c5ra12478f.

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20

Xu, Liang, and Yun Lu. "One-step synthesis of a cobalt sulfide/reduced graphene oxide composite used as an electrode material for supercapacitors." RSC Advances 5, no. 83 (2015): 67518–23. http://dx.doi.org/10.1039/c5ra11711a.

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21

Deng, Laicong, Zhuxian Yang, Rong Li, Binling Chen, Quanli Jia, Yanqiu Zhu, and Yongde Xia. "Graphene-reinforced metal-organic frameworks derived cobalt sulfide/carbon nanocomposites as efficient multifunctional electrocatalysts." Frontiers of Chemical Science and Engineering 15, no. 6 (October 1, 2021): 1487–99. http://dx.doi.org/10.1007/s11705-021-2085-3.

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AbstractDeveloping cost-effective electrocatalysts for oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is vital in energy conversion and storage applications. Herein, we report a simple method for the synthesis of graphene-reinforced CoS/C nanocomposites and the evaluation of their electrocatalytic performance for typical electrocatalytic reactions. Nanocomposites of CoS embedded in N, S co-doped porous carbon and graphene (CoS@C/Graphene) were generated via simultaneous sulfurization and carbonization of one-pot synthesized graphite oxide-ZIF-67 precursors. The obtained CoS@C/Graphene nanocomposites were characterized by X-ray diffraction, Raman spectroscopy, thermogravimetric analysis-mass spectroscopy, scanning electronic microscopy, transmission electronic microscopy, X-ray photoelectron spectroscopy and gas sorption. It is found that CoS nanoparticles homogenously dispersed in the in situ formed N, S co-doped porous carbon/graphene matrix. The CoS@C/10Graphene composite not only shows excellent electrocatalytic activity toward ORR with high onset potential of 0.89 V, four-electron pathway and superior durability of maintaining 98% of current after continuously running for around 5 h, but also exhibits good performance for OER and HER, due to the improved electrical conductivity, increased catalytic active sites and connectivity between the electrocatalytic active CoS and the carbon matrix. This work offers a new approach for the development of novel multifunctional nanocomposites for the next generation of energy conversion and storage applications.
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22

Zhang, Ying, Pingwei Li, Xuying Yin, Ya Yan, Ke Zhan, Junhe Yang, and Bin Zhao. "Cobalt sulfide supported on nitrogen and sulfur dual-doped reduced graphene oxide for highly active oxygen reduction reaction." RSC Adv. 7, no. 79 (2017): 50246–53. http://dx.doi.org/10.1039/c7ra09231h.

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An efficient composite catalyst of Co–S/NS-rGO has been successfully prepared by a facile one-step annealing approach, which demonstrates excellent catalytic activity and good durability in alkaline solution.
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23

Daniyal, Wan Mohd Ebtisyam Mustaqim Mohd, Yap Wing Fen, Silvan Saleviter, Narong Chanlek, Hideki Nakajima, Jaafar Abdullah, and Nor Azah Yusof. "X-ray Photoelectron Spectroscopy Analysis of Chitosan–Graphene Oxide-Based Composite Thin Films for Potential Optical Sensing Applications." Polymers 13, no. 3 (February 2, 2021): 478. http://dx.doi.org/10.3390/polym13030478.

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In this study, X-ray photoelectron spectroscopy (XPS) was used to study chitosan–graphene oxide (chitosan–GO) incorporated with 4-(2-pyridylazo)resorcinol (PAR) and cadmium sulfide quantum dot (CdS QD) composite thin films for the potential optical sensing of cobalt ions (Co2+). From the XPS results, it was confirmed that carbon, oxygen, and nitrogen elements existed on the PAR–chitosan–GO thin film, while for CdS QD–chitosan–GO, the existence of carbon, oxygen, cadmium, nitrogen, and sulfur were confirmed. Further deconvolution of each element using the Gaussian–Lorentzian curve fitting program revealed the sub-peak component of each element and hence the corresponding functional group was identified. Next, investigation using surface plasmon resonance (SPR) optical sensor proved that both chitosan–GO-based thin films were able to detect Co2+ as low as 0.01 ppm for both composite thin films, while the PAR had the higher binding affinity. The interaction of the Co2+ with the thin films was characterized again using XPS to confirm the functional group involved during the reaction. The XPS results proved that primary amino in the PAR–chitosan–GO thin film contributed more important role for the reaction with Co2+, as in agreement with the SPR results.
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24

Sun, Lijuan, Yuan Li, Yongping Dan, Xiangyang Lu, Xiaoquan Li, Fengge Wang, Xixi Han, and Ying Zhang. "Self-assembled composite thin film counter electrode of cobalt sulfide/functionalized graphene for dye-sensitized solar cells." Thin Solid Films 679 (June 2019): 8–14. http://dx.doi.org/10.1016/j.tsf.2019.04.012.

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25

Chihava, Ruvimbo, Daniel Apath, Mambo Moyo, Munyaradzi Shumba, Vitalis Chitsa, and Piwai Tshuma. "One-Pot Synthesized Nickel-Cobalt Sulfide-Decorated Graphene Quantum Dot Composite for Simultaneous Electrochemical Determination of Antiretroviral Drugs: Lamivudine and Tenofovir Disoproxil Fumarate." Journal of Sensors 2020 (July 2, 2020): 1–13. http://dx.doi.org/10.1155/2020/3124102.

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In the present study, simultaneous electrochemical behavior of tenofovir disoproxil fumarate (TDF) and lamivudine (LAM) on a glassy carbon electrode (GCE) modified with a novel nanocomposite, nickel-cobalt sulfide-decorated graphene quantum dots (Ni-CoS/GQDs) was investigated. Characterization of different components used for modifications was achieved using UV-Vis and transmission electron microscopy (TEM). The electrochemistry of TDF and LAM at the modified electrode was examined using cyclic voltammetry (CV), linear sweep voltammetry (LSV), chronoamperometry, differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS). A substantial (+39 mV TDF; +20 mV LAM) decrease in potential on oxidation reaction in 0.1 M PBS (pH 8.0) was achieved due to synergy between Ni-CoS and GQDs. Using optimized voltammetric parameters and pH, DPV gave a linear calibration over the range 5-18 μM for TDF and LAM. The detection limits were calculated as 2.42×10−8 mM (LAM) and 1.21×10−8 mM (TDF). The estimated values for Gibbs free energy revealed adsorption of TDF and LAM on Ni-CoS/GQDs/GCE as a spontaneous and favorable process. The voltammetric method was applied for determination of LAM and TDF in a pharmaceutical formulation giving average recovery of 99.65%.
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26

Kubendhiran, Subbiramaniyan, Balamurugan Thirumalraj, Shen-Ming Chen, and Chelladurai Karuppiah. "Electrochemical co-preparation of cobalt sulfide/reduced graphene oxide composite for electrocatalytic activity and determination of H2O2 in biological samples." Journal of Colloid and Interface Science 509 (January 2018): 153–62. http://dx.doi.org/10.1016/j.jcis.2017.08.087.

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27

Wang, Guiqiang, Juan Zhang, Shuai Kuang, Shaomin Liu, and Shuping Zhuo. "The production of cobalt sulfide/graphene composite for use as a low-cost counter-electrode material in dye-sensitized solar cells." Journal of Power Sources 269 (December 2014): 473–78. http://dx.doi.org/10.1016/j.jpowsour.2014.07.018.

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28

Peng, Shengjie, Xiaopeng Han, Linlin Li, Zhiqiang Zhu, Fangyi Cheng, Madhavi Srinivansan, Stefan Adams, and Seeram Ramakrishna. "Unique Cobalt Sulfide/Reduced Graphene Oxide Composite as an Anode for Sodium-Ion Batteries with Superior Rate Capability and Long Cycling Stability." Small 12, no. 10 (January 13, 2016): 1359–68. http://dx.doi.org/10.1002/smll.201502788.

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29

Chang, Jiuli, Shiqi Zang, Wenfang Liang, Dapeng Wu, Zhaoxun Lian, Fang Xu, Kai Jiang, and Zhiyong Gao. "Enhanced faradic activity by construction of p-n junction within reduced graphene oxide@cobalt nickel sulfide@nickle cobalt layered double hydroxide composite electrode for charge storage in hybrid supercapacitor." Journal of Colloid and Interface Science 590 (May 2021): 114–24. http://dx.doi.org/10.1016/j.jcis.2021.01.035.

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30

Meng, Alan, Liying Sheng, Kun Zhao, and Zhenjiang Li. "A controllable honeycomb-like amorphous cobalt sulfide architecture directly grown on the reduced graphene oxide–poly(3,4-ethylenedioxythiophene) composite through electrodeposition for non-enzyme glucose sensing." Journal of Materials Chemistry B 5, no. 45 (2017): 8934–43. http://dx.doi.org/10.1039/c7tb02482g.

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A facile, controllable two-step electrodeposition route was developed, whereby a honeycomb-like amorphous CoxSy architecture was obtained via direct growth on rGO–PEDOT/GCE as an electrode for glucose detection.
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31

Zhang, Li, Pengcheng Zhao, Chenxi Wang, Yilin Wang, Yaqi Yang, Yixi Xie, and Junjie Fei. "Ultrasensitive luteolin electrochemical sensor based on glass carbon electrodemodified using multi-walled carbon nanotube supported hollow cobalt sulfide (CoSx) polyhedrons / graphene quantum dots composites." Analyst, 2022. http://dx.doi.org/10.1039/d2an00345g.

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Luteolin (LU) belongs to the group of flavonoids with rich biological activities, has been attracted much attention. Herein, a novel ultrasensitive LU electrochemical sensor was proposed based on hollow cobalt...
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32

Wang, Nan, Ligui Li, Dengke Zhao, Xiongwu Kang, Zhenghua Tang, and Shaowei Chen. "Trifunctional Electrocatalysts: Graphene Composites with Cobalt Sulfide: Efficient Trifunctional Electrocatalysts for Oxygen Reversible Catalysis and Hydrogen Production in the Same Electrolyte (Small 33/2017)." Small 13, no. 33 (September 2017). http://dx.doi.org/10.1002/smll.201770178.

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33

Meng, Xiaoqian, Jin Deng, Junwu Zhu, Huiping Bi, Erjun Kan, and Xin Wang. "Cobalt Sulfide/Graphene Composite Hydrogel as Electrode for High-Performance Pseudocapacitors." Scientific Reports 6, no. 1 (February 16, 2016). http://dx.doi.org/10.1038/srep21717.

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34

Ding, Meijie, ZhiQiang Wei, ShangPan Huang, Chao Li, and Qiang Lu. "Electrochemical Properties of NiCo2S4/rGO Nanocomposites Synthesized by Hydrothermal Method." Current Nanoscience 17 (August 26, 2021). http://dx.doi.org/10.2174/1573413717666210826115543.

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Background: Transition metal sulfide, especially Nickel cobalt sulfide (NiCo2S4 ), has been widely studied as electrode material based on its excellent electrochemical properties. It is found that increasing the conductivity and stability of the electrode material can greatly improve the performance of the supercapacitor. Method: Three-dimensional (3D) NiCo2S4 and NiCo2S4/rGO composite material are synthesized via two-step hydrothermal method for high-performance supercapacitor electrode material. Besides, the electrochemical properties of NiCo2S4/rGO have been analyzed by many characterization methods. Results: The experiment shows that pure NiCo2S4 samples exhibit a cubic spinel structure, and their morphologies are 3D flower-like structures. The ultra-pasteurized Nio2S4 nanospheres have been successfully inserted into the surface of graphene through a hydrothermal method. A large specific surface of NiCo2S4/rGO has been observed from morphology and structure analysis. The specific electric capacity of the NiCo2S4/rGO electrode has reached 1002.9 F/g, when the current density is 1 A/g. It has been found that the capacitance retention rate of NiCo2S4/rGO composite electrode material has increased from 59.6% to 88.5% compared to NiCo2S4 after 2000 cycles at 5 A/g. Moreover, experiments denote that NiCo2S4/rGO electrode material has a larger ion diffusion rate and lesser solution resistance from the electrochemical independence spectrum (EIS).
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35

"Novel Cobalt Sulfide/Reduced Graphene Oxides Composite As Advanced Anode for Sodium-Ion Batteries." ECS Meeting Abstracts, 2016. http://dx.doi.org/10.1149/ma2016-01/1/66.

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