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Articles de revues sur le sujet « Batteria a flusso »

Auteur : Grafiati
Publié le 9 mars 2023
Mis à jour le 10 mars 2023

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1

Kosyrczyk, Ludwik, Slawomir Stelmach, Krzysztof Gaska, Agnieszka Generowicz, Natalia Iwaszczuk et Dariusz Kardaś. « Optimization of Thermal Parameters of the Coke Oven Battery by Modified Methodology of Temperature Measurement in Heating Flues as the Management Tool in the Cokemaking Industry ». Energies 14, no 4 (9 février 2021) : 904. http://dx.doi.org/10.3390/en14040904.

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Coke production is still of great economic importance due to its crucial role in the steel production process. The reliability of the operation of coke oven batteries depends on the maintenance of good technical condition of their ceramic massif, which in turn requires ensuring proper operation of the heating system and maintaining temperature stability in the heating flues. Regularly performed temperature measurements in heating flues due to the size of the battery and the dynamics of accompanying processes do not reflect the actual thermal state of the object at a given time. Corrections commonly introduced to the results of temperature measurements in heating flues, taking into account so-called reversion, significantly improve the accuracy of the obtained measurement results. However, still the interpretation of the results of temperature measurements in the coke oven battery heating flues does not take into account its changes during the coking cycle, even though they reach up to 60 K. The article discusses the usability of the introduction of a new, additional correction to the temperature measured in the heating flues enabling a more precise assessment of the current thermal state of the coke oven battery. The use of the method will allow for reduction of the fuel gas consumption and limitation of emissions resulting from its combustion and can be used as an effective tool for decision making.
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Düerkop, Dennis, Hartmut Widdecke, Carsten Schilde, Ulrich Kunz et Achim Schmiemann. « Polymer Membranes for All-Vanadium Redox Flow Batteries : A Review ». Membranes 11, no 3 (18 mars 2021) : 214. http://dx.doi.org/10.3390/membranes11030214.

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Redox flow batteries such as the all-vanadium redox flow battery (VRFB) are a technical solution for storing fluctuating renewable energies on a large scale. The optimization of cells regarding performance, cycle stability as well as cost reduction are the main areas of research which aim to enable more environmentally friendly energy conversion, especially for stationary applications. As a critical component of the electrochemical cell, the membrane influences battery performance, cycle stability, initial investment and maintenance costs. This review provides an overview about flow-battery targeted membranes in the past years (1995–2020). More than 200 membrane samples are sorted into fluoro-carbons, hydro-carbons or N-heterocycles according to the basic polymer used. Furthermore, the common description in membrane technology regarding the membrane structure is applied, whereby the samples are categorized as dense homogeneous, dense heterogeneous, symmetrical or asymmetrically porous. Moreover, these properties as well as the efficiencies achieved from VRFB cycling tests are discussed, e.g., membrane samples of fluoro-carbons, hydro-carbons and N-heterocycles as a function of current density. Membrane properties taken into consideration include membrane thickness, ion-exchange capacity, water uptake and vanadium-ion diffusion. The data on cycle stability and costs of commercial membranes, as well as membrane developments, are compared. Overall, this investigation shows that dense anion-exchange membranes (AEM) and N-heterocycle-based membranes, especially poly(benzimidazole) (PBI) membranes, are suitable for VRFB requiring low self-discharge. Symmetric and asymmetric porous membranes, as well as cation-exchange membranes (CEM) enable VRFB operation at high current densities. Amphoteric ion-exchange membranes (AIEM) and dense heterogeneous CEM are the choice for operation mode with the highest energy efficiency.
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Ranom, Rahifa, Risna Syakinah Bacho et Saidatul Nur Aisyahtun Sakinah Ahmad Jamal. « The effect of electrolyte parameter variation upon the performance of lithium iron phosphate (LiFePO4) ». Indonesian Journal of Electrical Engineering and Computer Science 28, no 1 (1 octobre 2022) : 58. http://dx.doi.org/10.11591/ijeecs.v28.i1.pp58-66.

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This study focuses on the effect of electrolyte parameter variation upon the performance of lithium iron phosphate (LiFePO4) due to high demand of the electronic devices among consumers and industrial sectors that require efficicent LiFePO4 batteries. Hence, it is essential to improve its performance by optimizing the electrolyte parameter of the cell. The mathematical models of lithium-ion batteries based on the drift-diffusion model consists of the electrolyte and lithium transport equations in the electrode particles which incorporated the geometry of cell microstructure to the coefficients in the macroscopic model was solved numerically using the method of lines (MOL) technique. The effect of electrolyte parameter variation on the discharge curve of LiFePO4 using lithium hexa-fluoro-phosphate (LiPF6 ) as the base electrolyte is examined by varying the electrolyte parameters: initial concentration of lithium ions (c0), the effective diffusivity of lithium ions (D) and the effective ionic conductivity (𝜅). The simulations show that higher diffusivity of lithium ions produces large discharge curve and higher ionic conductivity increase the mobility of the ion in the cell. Meanwhile, higher initial concentration of lithium ions produced high battery performance compared to lower initial concentration of lithium ion resulting more discharge time before electrolyte depletion occurs.
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Gao, Haining, Kosuke Yoshinaga, Timothy M. Swager et Betar M. Gallant. « Perfluoroalkylated Catholyte Harnessing Multiple Fluoride Bond Breaking for Lithium Primary Batteries ». ECS Meeting Abstracts MA2022-02, no 7 (9 octobre 2022) : 2491. http://dx.doi.org/10.1149/ma2022-0272491mtgabs.

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Lithium primary batteries, with theoretical energy densities 3x higher than the rechargeable systems, are critical for applications where recharging is impossible or impractical, such as medical implants, unmanned vehicles, and remote monitoring. The current energy leader among commercial primaries is the Li−carbon monofluoride (CFx) battery, which has the highest theoretical energy density (2180 Wh/kgCFx) and up to 800 Wh/kg achieved in packaged cells. The solid CFx (0 < x ≤ 1.3) particles enable excellent safety and shelf stability, but also result in limited rate capability due to low electronic conductivity. Unfortunately, despite the increasing demand for high-energy Li primaries, the field is maturing with few fundamental innovations in cell chemistries in the past 40 years. To design battery chemistries that can surpass the energy of Li−CFx cell, herein, we examined the possibility to conduct multi-electron carbon reduction in high F content perfluoroalkyl groups (RF = −CnF2n+1, with F/C ratios of x>2) using liquid phase reactants. First, using liquid perfluoroalkyl iodides (CFI) as a model system, we investigated the governing factors for C−F bond redox, including supporting solvent viscosity, CFI chain length and concentration, discharge rate, and temperature. Up to 8 e− transfer per CFI (>1.3 e− per C, or 8/13 available F) is achievable with low reactant concentrations (0.1 M) and rates (20 μA/cm2). CFI catholyte sees challenges at high reactant concentrations and/or rates, as premature cell termination caused by deactivation of intermediates was observed. Therefore, to address this issue, we examined multiple handles in molecular structure to further tune the C−F bond activity. By replacing the I-ligand in CFI with an aromatic structure, the obtained fluoro-aromatics demonstrate close-to-full defluorination of RF group, yielding up to 15 e− (out of 17 available F) transfer per molecule, and attractive gravimetric energies of up to 1785 Wh/kgfluoro-aromatic, at high potentials (up to 2.6 V vs. Li/Li+) and concentrations (up to 1 M). Additionally, the voltage compatibility of the fluoro-aromatics with CFx enabled the hybridization of the catholyte and solid cathode in one cell. The hybrid cells provide opportunity to maximize the active material loading at cell-level, showing strong potential to further improve the energy densities over existing battery systems.
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Gelman, D., B. Shvartsev et Y. Ein-Eli. « Aluminum–air battery based on an ionic liquid electrolyte ». J. Mater. Chem. A 2, no 47 (2014) : 20237–42. http://dx.doi.org/10.1039/c4ta04721d.

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This study presents a novel non-aqueous Al–air battery utilizing 1-ethyl-3-methylimidazolium oligo-fluoro-hydrogenate room temperature ionic liquid. The Al–air-RTIL system can sustain current densities up to 1.5 mA cm−2, producing capacities above 140 mA h cm−2, thus utilizing above 70% of the theoretical Al capacity.
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Sun, Xiao-Guang, Shun Wan, Hong Yu Guang, Youxing Fang, Kimberly Shawn Reeves, Miaofang Chi et Sheng Dai. « New promising lithium malonatoborate salts for high voltage lithium ion batteries ». Journal of Materials Chemistry A 5, no 3 (2017) : 1233–41. http://dx.doi.org/10.1039/c6ta07757a.

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Three new lithium salts, lithium difluoro-2-methyl-2-fluoromalonaoborate, lithium difluoro-2-ethyl-2-fluoromalonaoborate, and lithium difluoro-2-propyl-2-fluoro malonaoborate exhibit good cycling stability with high coulombic efficiencies in LiNi0.5Mn1.5O4 and graphite based half-cells and full cells.
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Rajagopalan, Ranjusha, Zhenguo Wu, Yumei Liu, Shaymaa Al-Rubaye, Enhui Wang, Chunjin Wu, Wei Xiang et al. « A novel high voltage battery cathodes of Fe 2+ /Fe 3+ sodium fluoro sulfate lined with carbon nanotubes for stable sodium batteries ». Journal of Power Sources 398 (septembre 2018) : 175–82. http://dx.doi.org/10.1016/j.jpowsour.2018.07.066.

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Menzel, Jennifer, Hannah Schultz, Vadim Kraft, Juan Pablo Badillo, Martin Winter et Sascha Nowak. « Quantification of ionic organo(fluoro)phosphates in decomposed lithium battery electrolytes ». RSC Advances 7, no 62 (2017) : 39314–24. http://dx.doi.org/10.1039/c7ra07486g.

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Wang, De-Gao, Nuo Li, Yiming Hu, Shun Wan, Min Song, Guipeng Yu, Yinghua Jin et al. « Highly Fluoro-Substituted Covalent Organic Framework and Its Application in Lithium–Sulfur Batteries ». ACS Applied Materials & ; Interfaces 10, no 49 (15 novembre 2018) : 42233–40. http://dx.doi.org/10.1021/acsami.8b14213.

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Lipunov, P. V., Ch Bhattacharya, S. Mashyal et V. Chouurasia. « Cleaning the inclined flues in coke batteries with bottom heating-gas supply ». Coke and Chemistry 59, no 10 (octobre 2016) : 380–83. http://dx.doi.org/10.3103/s1068364x16100045.

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Stenzel, Yannick Philipp, Jonas Henschel, Martin Winter et Sascha Nowak. « A new HILIC-ICP-SF-MS method for the quantification of organo(fluoro)phosphates as decomposition products of lithium ion battery electrolytes ». RSC Advances 9, no 20 (2019) : 11413–19. http://dx.doi.org/10.1039/c9ra01291e.

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Kristiyono, Roedy, Budi Nugroho et Bambang Supriyanto. « AUTOMATIC CHARGING BATTERY LITHIUM UNTUK KENDARAAN LISTRIK ». Teknika 7, no 4 (31 octobre 2022) : 236–42. http://dx.doi.org/10.52561/teknika.v7i4.195.

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Lithium dan senyawanya memiliki beberapa aplikasi industri termasuk kaca dan keramik tahan panas, pelumas gemuk lithium, aditif fluks untuk produksi besi, baja dan alumunium, baterai logam lithium dan baterai lithium-ion. Penelitian ini berusaha untuk membuat dan menggunakan sistem pengisian dan monitor pada baterai lithium untuk kendaraan listrik. Sistem dirancang sesedehana mungkin dan praktis. Peralatan yang demikian ini dimungkinkan mudah untuk dibawa kemana-mana secara portabel serta membutuhkan energi listrik yang relatif kecil pada proses pengisiannya. Sistem dibangun dengan dengan mode otomatis dalam pengisiannya secara paralel pada level tegangan 4.2 volt, setelah terisi penuh maka sistem akan melanjutkan pengisian level tegangan 8.4 volt dan jika sudajh penuh, maka akan melakukan lanjutan di level tegangan 12.6 volt, dan sistem pengisian akan terhenti disaat level tegangan tersebut tercapai dengan maksimal arus pengisian 2 ampere. Pengujian pemgisian berhasil dengan baik dengan tegangan sebesar 12,3 volt dan arus tersimpan mencapai 10A pada battery lithium terpasang dalam pengujian dalam waktu 270 menit. Jika kebutuhan kelipatan tegangan 12 volt, seperti 48 volt, 64 volt dan 76 volt, maka baterry lithium hanya butuh dipararel lagi, Dan sistem charging akan tetap bekerja dengan baik.
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García Limón, B. Y. « PREPARATION AND CHARACTERIZATION OF PVDF/PES/NAFION® 117 MEMBRANES WITH POTENTIAL APPLICATION IN VANADIUM FLOW BATTERIES ». Revista Mexicana de Ingeniería Química 18, no 2 (27 mai 2019) : 477–86. http://dx.doi.org/10.24275/uam/izt/dcbi/revmexingquim/2019v18n2/garcia.

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Montalbano, Michele, Daniele Callegari, Umberto Anselmi Tamburini et Cristina Tealdi. « Design of Perovskite-Type Fluorides Cathodes for Na-ion Batteries : Correlation between Structure and Transport ». Batteries 8, no 9 (13 septembre 2022) : 126. http://dx.doi.org/10.3390/batteries8090126.

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Transition metal-based sodium fluoro-perovskite of general formula NaMF3 (M = Fe, Mn, and Co) were investigated as cathode materials for rechargeable Na-ion batteries. Preliminary results indicated Na-ion reversible intercalation but highlighted the need to find optimization strategies to improve conductivity and to modulate the operating voltages within experimentally accessible electrolytes’ stability windows, in order to fully exploit their potential as high-voltage cathodes. In this study, we combined experimental and computational techniques to investigate structures, defects, and intercalation properties of the NaFe1-xMnxF3 and NaCo1-xMnxF3 systems. Through the use of a simple solvothermal synthesis, we demonstrated the possibility to modulate the sample’s morphology in order to obtain fine and dispersed powder samples. The structural results indicated the formations of two solid solutions with a perovskite structure over the entire compositional range investigated. Atomistic simulations suggested that Na-ion diffusion in these systems was characterized by relatively high migration barriers and it was likely to follow three-dimensional paths, thus limiting the effect of anti-site defects. The correlation between structural and computational data highlighted the possibility to modulate both ionic and electronic conductivity as a function of the composition.
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Xue, Zhao-Ming, Ben-Hao Zhao et Chun-Hua Chen. « A new lithium salt with 3-fluoro-1,2-benzenediolato and lithium tetrafluoroborate for lithium battery electrolytes ». Journal of Power Sources 196, no 15 (août 2011) : 6478–82. http://dx.doi.org/10.1016/j.jpowsour.2011.04.011.

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Xue, Zhao-Ming, Chun-Qin Ji, Wei Zhou et Chun-Hua Chen. « A new lithium salt with 3-fluoro-1,2-benzenediolato and oxalato complexes of boron for lithium battery electrolytes ». Journal of Power Sources 195, no 11 (1 juin 2010) : 3689–92. http://dx.doi.org/10.1016/j.jpowsour.2009.12.049.

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Liao, Junbin, Youqun Chu, Qi Zhang, Kai Wu, Jun Tang, Meizhen Lu et Jianli Wang. « Fluoro-methyl sulfonated poly(arylene ether ketone-co-benzimidazole) amphoteric ion-exchange membranes for vanadium redox flow battery ». Electrochimica Acta 258 (décembre 2017) : 360–70. http://dx.doi.org/10.1016/j.electacta.2017.11.063.

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Majewski, Lukasz, Filip Maciąg, Pawel M. Boguszewski et Jacek Kuznicki. « Transgenic Mice Overexpressing Human STIM2 and ORAI1 in Neurons Exhibit Changes in Behavior and Calcium Homeostasis but Show No Signs of Neurodegeneration ». International Journal of Molecular Sciences 21, no 3 (28 janvier 2020) : 842. http://dx.doi.org/10.3390/ijms21030842.

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The maintenance of proper cytosolic Ca2+ level is crucial for neuronal survival, and dysregulation of Ca2+ homeostasis is found in a variety of neurological disorders, including Alzheimer’s disease. According to the “Ca2+ hypothesis of aging”, Ca2+ disturbances precede the onset of AD symptoms and lead to neurodegeneration. STIM and ORAI proteins are involved in neuronal physiological and pathological processes as essential components of the store-operated Ca2+ entry. Our previous data suggested that overexpression of STIM2 and ORAI1 might increase basal neuronal cytosolic Ca2+ level. We generated double transgenic mice overexpressing these two genes in neurons, expecting that the increased basal Ca2+ concentration will lead to premature neurodegeneration. We observed changes in Ca2+ homeostasis and electrophysiological properties in acute brain slices of STIM2/ORAI1 neurons. However, we did not observe any augmentation of neurodegenerative processes, as tested by Fluoro-Jade® C staining and assessment of amyloidogenesis. The battery of behavioral tests did not show any signs of accelerated aging. We conclude that changes of calcium homeostasis induced by overexpression of STIM2 and ORAI1 had no substantial adverse effects on neurons and did not lead to early neurodegeneration.
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Suvire, Gaston Orlando, Leonardo Javier Ontiveros et Pedro Enrique Mercado. « Combined control of a flywheel energy storage system and a vanadium redox flow battery for wind energy applications in microgrids ». DYNA 84, no 202 (1 juillet 2017) : 230–38. http://dx.doi.org/10.15446/dyna.v84n202.64705.

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La incorporación de potencia eólica en microredes está creciendo progresivamente. Esta integración puede introducir problemas en la dinámica y calidad de potencia del sistema eléctrico debido a fluctuaciones del viento. Este trabajo propone un controlador compuesto por un sistema de acondicionamiento de potencia (PCS), un almacenador flywheel (FESS) y una batería de flujo redox de vanadio (VRFB) para mitigar problemas introducidos por la generación eólica en microredes. Se presenta un modelo del PCS/FESS-VRFB y se propone un método para controlar la potencia intercambiada entre el controlador y la red eléctrica. El método tiene dos modos: nivelación de potencia y control de frecuencia. A través de simulaciones, se estudia el desempeño del PCS/FESS-VRFB cuando opera con generación eólica en microredes. Los resultados demuestran un adecuado desempeño del método propuesto y una alta efectividad para nivelar las fluctuaciones de potencia eólica y proveer soporte para el control de frecuencia de la microred.
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Kösters, Kristina, Jonas Henschel, Constantin Lürenbaum, Marcel Diehl, Laura Nowak, Martin Winter et Sascha Nowak. « Fast sample preparation for organo(fluoro)phosphate quantification approaches in lithium ion battery electrolytes by means of gas chromatographic techniques ». Journal of Chromatography A 1624 (août 2020) : 461258. http://dx.doi.org/10.1016/j.chroma.2020.461258.

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Stenzel, Yannick Philipp, Simon Wiemers-Meyer, Jan Edel, Martin Winter et Sascha Nowak. « Analysis of acidic organo(fluoro)phosphates as decomposition product of lithium ion battery electrolytes via derivatization gas chromatography-mass spectrometry ». Journal of Chromatography A 1592 (mai 2019) : 188–91. http://dx.doi.org/10.1016/j.chroma.2019.02.022.

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Kho, A. Ra, Dae Ki Hong, Beom Seok Kang, Woo-Jung Park, Kyung Chan Choi, Kyoung-Ha Park et Sang Won Suh. « The Effects of Atorvastatin on Global Cerebral Ischemia-Induced Neuronal Death ». International Journal of Molecular Sciences 22, no 9 (22 avril 2021) : 4385. http://dx.doi.org/10.3390/ijms22094385.

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(1) Background and Purpose: Global cerebral ischemia-induced severe hypoxic brain damage is one of the main causes of mortality and long-term neurologic disability even after receiving early blood reperfusion. This study aimed to test the hypothesis that atorvastatin potentially has neuroprotective effects in global cerebral ischemia (GCI). (2) Methods: We performed two sets of experiments, analyzing acute (1-week) and chronic (4-week) treatments. For the vehicle (Veh) and statin treatments, 1 mL of 0.9% saline and 5 mg/kg of atorvastatin (ATOR) were administered orally. For histological analysis, we used the following staining protocols: Fluoro-Jade B and NeuN, 4-hydroxynonenal, CD11b and GFAP, IgG, SMI71, and vWF. Finally, we evaluated the cognitive function with a battery of behavioral tests. (3) Results: The GCI-ATOR group showed significantly reduced neuronal death, oxidative stress, inflammation, and BBB disruption compared with the GCI-Veh group. Moreover, the GCI-ATOR group showed decreased endothelial damage and VV proliferation and had significantly improved cognitive function compared with the GCI-Veh group in both models. (4) Conclusions: ATOR has neuroprotective effects and helps recover the cognitive function after GCI in rats. Therefore, administration of atorvastatin may be a therapeutic option in managing GCI after CA.
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Nanbu, Noritoshi, Koji Tsuchiya, Takatsugu Shibazaki et Yukio Sasaki. « Lithium Tris[3-fluoro-1,2-benzenediolato(2-)-O,O[sup ʹ]]phosphate as a Novel Lithium Salt for Lithium Battery Electrolytes ». Electrochemical and Solid-State Letters 5, no 9 (2002) : A202. http://dx.doi.org/10.1149/1.1496535.

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Lohani, Harshita, Ajit Kumar, Pratima Kumari, Aakash Ahuja, Manoj Gautam, Abhinanda Sengupta et Sagar Mitra. « Artificial Organo-Fluoro-Rich Anode Electrolyte Interface and Partially Sodiated Hard Carbon Anode for Improved Cycle Life and Practical Sodium-Ion Batteries ». ACS Applied Materials & ; Interfaces 14, no 33 (15 août 2022) : 37793–803. http://dx.doi.org/10.1021/acsami.2c09985.

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Michel, Caroline, Laurence Dricot, Renaud Lhommel, Cécile Grandin, Adrian Ivanoiu, Agnesa Pillon et Dana Samson. « Extensive Left Temporal Pole Damage Does Not Impact on Theory of Mind Abilities ». Journal of Cognitive Neuroscience 25, no 12 (décembre 2013) : 2025–46. http://dx.doi.org/10.1162/jocn_a_00488.

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The temporal poles (TPs) are among the brain regions that are often considered as the brain network sustaining our ability to understand other people's mental states or “Theory of Mind” (ToM). However, so far the functional role of the left and right TPs in ToM is still debated, and it is even not clear yet whether these regions are necessary for ToM. In this study, we tested whether the left TP is necessary for ToM by assessing the mentalizing abilities of a patient (C.M.) diagnosed with semantic dementia. Converging evidence from detailed MRI and 18F-fluoro-2-deoxy-d-glucose PET examinations showed a massive atrophy of the left TP with the right TP being relatively unaffected. Furthermore, C.M.'s atrophy encompassed most regions of the left TP usually activated in neuroimaging studies investigating ToM. Given C.M.'s language impairments, we used a battery of entirely nonverbal ToM tasks. Across five tasks encompassing 100 trials, which probed the patient's ability to attribute various mental states (intentions, knowledge, and beliefs), C.M. showed a totally spared performance. This finding suggests that, despite its consistently observed activation in neuroimaging studies involving ToM tasks, the left TP is not necessary for ToM reasoning, at least in nonverbal conditions and as long as its right counterpart is preserved. Implications for understanding the social abilities of patients with semantic dementia are discussed.
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Zhang, Yong, Lizhen Wang, Aiqin Zhang, Cuifen Zhang et Peng Zhang. « Application of 2-chloro-1,4-dimethoxybenzene and 4-fluoro-1,2-dimethoxybenzene additives in electrolyte for liquid state Al-plastic film lithium-ion batteries ». Ionics 17, no 5 (12 février 2011) : 421–27. http://dx.doi.org/10.1007/s11581-011-0520-z.

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Johnsi, M., et S. Austin Suthanthiraraj. « Preparation, zinc ion transport properties, and battery application based on poly(vinilydene fluoride-co-hexa fluoro propylene) polymer electrolyte system containing titanium dioxide nanofiller ». High Performance Polymers 27, no 7 (9 janvier 2015) : 877–85. http://dx.doi.org/10.1177/0954008314565397.

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Ahmed, Faiz, Inhwan Choi, Md Mahbubur Rahman, Hohyoun Jang, Taewook Ryu, Sujin Yoon, Lei Jin, Yongcheng Jin et Whangi Kim. « Remarkable Conductivity of a Self-Healing Single-Ion Conducting Polymer Electrolyte, Poly(ethylene-co-acrylic lithium (fluoro sulfonyl)imide), for All-Solid-State Li-Ion Batteries ». ACS Applied Materials & ; Interfaces 11, no 38 (30 août 2019) : 34930–38. http://dx.doi.org/10.1021/acsami.9b10474.

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Paramio Leiva, Alberto, Paloma Gil-Olarte Márquez, Cristina Guerrero Rodríguez, José M. Mestre Navas et Rocío Guil Bozal. « EJERCICIO FÍSICO Y CALIDAD DE VIDA EN ESTUDIANTES UNIVERSITARIOS ». International Journal of Developmental and Educational Psychology. Revista INFAD de Psicología. 2, no 1 (22 octobre 2017) : 437. http://dx.doi.org/10.17060/ijodaep.2017.n1.v2.956.

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Abstract.PHYSICAL EXERCISE AND QUALITY OF LIFE IN UNIVERSITY STUDENTSThe recommendation of physical exercise as a strategy for prevention and promotion of health has been established in both the health and psychological areas. Despite the increased flow of research in recent years, the need to increase the empirical support of the relationships between physical activity and quality of life is well known. In favor of this need, this study aims to: 1. Clarify if there are different typologies between those who perform physical exercise and those who do not. 2. Delimit more specific typologies according to the frequency of realization from a gender perspective. To do this, a battery of questionnaires focused on quality of life indicators: depression, state anxiety (A-State), trait anxiety (A-Trait), personal satisfaction and satisfaction with life were administered to a sample of 153 university students. By means of the biphasic cluster analysis, we obtain 2 typologies among the students that perform some physical activity and those students who do not perform any physical exercise, the first responding to a better score in the previously mentioned indicators. Deepening the frequency, and taking into account the gender of individuals who exercise; we have differentiated 4 typologies, 2 composed mainly by men who behave as expected, responding to a better quality of life the category that performs a higher frequency of exercise a week; and 2 others composed of women who present differences that are not defined so pronounced and some variables are not related according to expectations. This fact underscores the need for more thorough investigation. We encourage research to develop physical activity programs aimed at improving the quality of life in different populations.Key words: Physical exercise, quality of life, students. depression, anxiety, personal satisfaction, satisfaction with life.Resumen.La recomendación del ejercicio físico como estrategia de prevención y promoción de la salud se ha establecido tanto en el ámbito sanitario como en el psicológico. A pesar del aumento del flujo de investigación en los últimos años, se es consciente de la necesidad de incrementar el respaldo empírico de las relaciones entre la actividad física y la calidad de vida. En favor de esta necesidad, este estudio se plantea como objetivos: 1. Clarificar si existen diferentes tipologías entre quienes realizan ejercicio físico y los que no. 2. Delimitar tipologías más específicas atendiendo a la frecuencia de realización desde una perspectiva de género. Para ello, se administró una batería de cuestionarios centrados los indicadores de calidad de vida: depresión, ansiedad estado, ansiedad rasgo, satisfacción personal y satisfacción con la vida a una muestra de 153 estudiantes universitarios. Mediante el análisis clúster biétapico, obtenemos 2 conglomerados entre los estudiantes que realizan alguna actividad física y aquellos estudiantes que no realizan ningún ejercicio físico, respondiendo los primeros a unas mejores puntuaciones en los indicadores anteriormente nombrados. Profundizando en la frecuencia, y teniendo en cuenta el género de los individuos que practican ejercicio, hemos diferenciado 4 conglomerados, 2 compuestos principalmente por hombres que se comportan como cabría esperar, respondiendo a una mejor calidad de vida el conglomerado que realiza una mayor frecuencia de ejercicio a la semana; y otras 2 compuestos por mujeres las cuales presentan diferencias que no se definen de forma tan pronunciada y algunas variables no se relacionan conforme a las expectativas. Este hecho remarca la necesidad de una investigación más exhaustiva. Animamos la labor de investigación en busca de elaborar programas de actividad física orientados a mejorar la calidad de vida en las distintas poblaciones.Palabras clave: Ejercicio físico, calidad de vida, estudiantes, depresión, ansiedad, satisfacción personal, satisfacción con la vida.
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Gao, Haining, Alejandro R. Sevilla, Gustavo M. Hobold, Aaron M. Melemed, Rui Guo, Simon C. Jones et Betar M. Gallant. « Fluoro-organosulfur catholytes to boost lithium primary battery energy ». Proceedings of the National Academy of Sciences 119, no 45 (3 novembre 2022). http://dx.doi.org/10.1073/pnas.2121440119.

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Discovery of new electrochemical redox motifs is essential to expand the design landscape for energy-dense batteries. We report a family of fluorinated reactants based on pentafluorosulfanyl arenes ( R-Ph-SF 5 ) that allow for high electron-transfer numbers (up to 8-e − /reactant) by exploiting multiple coupled redox processes, including extensive S–F bond breaking, yielding capacities of 861 mAh·g reactant −1 and voltages up to ∼2.9 V when used as catholytes in primary Li cells. At a cell level, gravimetric energies of 1,085 Wh·kg −1 are attained at 5 W·kg −1 and moderate temperatures of 50 °C, with 853 Wh·kg −1 delivered at >100 W·kg −1 , exceeding all leading primary batteries based on electrode + electrolyte (substack) mass. Voltage compatibility of R-Ph-SF 5 reactants and carbon monofluoride (CF x ) conversion cathodes further enabled investigation of a hybrid battery containing both fluorinated catholyte and cathode. The hybrid cells reach extraordinarily high cell active mass loading (∼80%) and energy (1,195 Wh·kg −1 ), allowing for significant boosting of substack gravimetric energy of Li−CF x cells by at least 20% while exhibiting good shelf life and safety characteristics.
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« A Novel Fluoro-Polyanionic Cathode LiV0.5Fe0.5PO4f for Lithium Ion Batteries ». ECS Meeting Abstracts, 2013. http://dx.doi.org/10.1149/ma2013-02/12/858.

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Sevilla, Alejandro R., Haining Gao, Katherine J. Steinberg et Betar M. Gallant. « Elucidating Concentration-Dependent Energy Limitations in Li Primary Battery Fluoro-organosulfur Catholytes ». Journal of Physical Chemistry C, 23 janvier 2023. http://dx.doi.org/10.1021/acs.jpcc.2c07659.

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« Lithium Metal Fluoro/Oxy-Phosphate as Positive Electrode Materials for Lithium-Ion Batteries ». ECS Meeting Abstracts, 2012. http://dx.doi.org/10.1149/ma2012-01/6/172.

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« Earth Abundant Iron-Based Fluoro(hydroxy)Phosphate As Cathode Materials for Aqueous Batteries ». ECS Meeting Abstracts, 2019. http://dx.doi.org/10.1149/ma2019-02/6/546.

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Silva, Agnaldo Plácido da, Eloá Jessica Mendes dos Santos Plácido et Walber Breno de Souza Moraes. « Gli impatti della zanzara transgenica sull’uomo e sull’ambiente ». Revista Científica Multidisciplinar Núcleo do Conhecimento, 15 novembre 2020, 158–76. http://dx.doi.org/10.32749/nucleodoconhecimento.com.br/biologia-it/zanzara-transgenica.

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Una delle maggiori sfide attualmente per la salute pubblica in Brasile e nel mondo sono le malattie trasmesse da vettori e le attuali misure di controllo sono inefficienti. Le zanzare sono tra i vettori di varie malattie, perché sono ematofagi, le femmine richiedono sangue nel periodo di ovulazione per la riproduzione e una volta contaminate, la zanzara può contenere batteri, protozoi e virus che vengono assegnati nelle loro ghiandole salivari, infettando così l’individuo direttamente nel flusso sanguigno. Aedes aegypti è responsabile delle malattie: dengue, zika, chikungunya e febbre gialla. Le forme di controllo per le zanzare vettoriali finora sono inefficaci, e con questo diverse tecnologie sono state sviluppate come alternative nel controllo e nel combattimento della zanzara Aedes aegypti. Con le recenti approvazioni per l’emissione di insetti geneticamente modificati, sono necessari studi più dettagliati per valutarne il potenziale ecologico e gli effetti evolutivi. Questi effetti possono verificarsi in due fasi: una fase transitoria quando la popolazione focale cambia in densità e una fase di stato stazionario quando raggiunge una densità nuova e costante. Con le innovazioni nel controllo vettoriale attraverso insetti geneticamente modificati ci danno una nuova prospettiva in relazione alla manipolazione genetica. Questo studio mira a valutare i potenziali effetti di un rapido cambiamento nella densità della zanzara Aedes aegypti correlata al controllo biologico attraverso la zanzara geneticamente modificata. Ci chiediamo quindi se la biotecnologia possa essere una soluzione ai problemi di salute pubblica nel caso della zanzara Aedes aegypti o un problema? Poiché la trasformazione o le modifiche di questi esseri viventi nei laboratori sono nuove tecniche che finora è impossibile sapere quali saranno le conseguenze a lungo termine.
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Vebber, Mario C., Nicole A. Rice, Jaclyn L. Brusso et Benoît H. Lessard. « Variance-resistant PTB7 and axially-substituted silicon phthalocyanines as active materials for high-Voc organic photovoltaics ». Scientific Reports 11, no 1 (28 juillet 2021). http://dx.doi.org/10.1038/s41598-021-94704-5.

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AbstractWhile the efficiency of organic photovoltaics (OPVs) has improved drastically in the past decade, such devices rely on exorbitantly expensive materials that are unfeasible for commercial applications. Moreover, examples of high voltage single-junction devices, which are necessary for several applications, particularly low-power electronics and rechargeable batteries, are lacking in literature. Alternatively, silicon phthalocyanines (R2-SiPc) are inexpensive, industrially scalable organic semiconductors, having a minimal synthetic complexity (SC) index, and are capable of producing high voltages when used as acceptors in OPVs. In the present work, we have developed high voltage OPVs composed of poly({4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl}{3-fluoro-2-[(2-ethylhexyl)carbonyl] thieno [3,4 b]thiophenediyl}) (PTB7) and an SiPc derivative ((3BS)2-SiPc). While changes to the solvent system had a strong effect on performance, interestingly, the PTB7:(3BS)2-SiPc active layer were robust to spin speed, annealing and components ratio. This invariance is a desirable characteristic for industrial production. All PTB7:(3BS)2-SiPc devices produced high open circuit voltages between 1.0 and 1.07 V, while maintaining 80% of the overall efficiency, when compared to their fullerene-based counterpart.
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Cepeda, Jaime, et Santiago Chamba. « Determinación del Modelo Estocástico del Estado de Carga de Baterías para el cómputo de Flujo de Potencia Probabilístico de Microrredes ». Revista Técnica "Energía" 16, no 1 (1 janvier 2019). http://dx.doi.org/10.37116/revistaenergia.v16.n1.2019.334.

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Este documento propone una novedosa metodología para la estimación probabilística del modelo estocástico del estado de carga (SOC por su nombre en inglés “State of Charge”) de los sistemas de almacenamiento de energía mediante baterías (BESS por su nombre en inglés “Battery Energy Storage Systems”). La estimación apropiada del SOC es uno de los parámetros más importantes en la planificación de la expansión y operación de las microrredes. Para ello, se estructura una herramienta computacional que enlaza los programas de DIgSILENT PowerFactory y Python. Este aplicativo permite, de forma probabilística, evaluar la operación de la microrred considerando la disponibilidad del recurso primario intermitente de las fuentes de energía renovables y la variabilidad de la demanda eléctrica. Como resultado se determinan los modelos estocásticos del SOC del BESS para cada período de tiempo. La metodología propuesta se aplica a una microrred de prueba que se conecta a la “Barra 6” del sistema de prueba WSCC de tres máquinas y nueve barras, obteniéndose resultados prometedores.
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Mastache-Mastache, Jorge Edmundo, César León Ramírez-Chávez, Jesús Adan Lovera-Garcia et José Ángel De La Garza-Macedo. « Sistema de recuperación de energía basado en emular el movimiento del flujo de agua en tuberías ». Revista de Ingeniería Tecnológica, 30 juin 2020, 1–8. http://dx.doi.org/10.35429/jten.2020.13.4.1.8.

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Energy production is an important factor for the development of productive activities, transformation and services in the country, whose generation and consumption increases year by year, which leads to the use of clean energy more and more. Hydropower as a portable application option contributes little to energy production in industries or homes, so this situation presents an opportunity for the development of adaptive power generation systems that take advantage of the movement of water. In the present work, a test bench based on an energy recovery system was developed, which consists of simulating the flow of water that exists in the pipes in order to generate electrical energy through mechanical movement by coupling a permanent magnet generator, where the behavior of a turbine interconnected to a pipeline was emulated, through a DC motor whose speed is controlled through a power chopper. A storage and power conversion was developed, integrating a rectifier module with filter which converted the signal from alternating to direct, which would later be the input of a Buck reducing CD-CD converter, which has high efficiency and allows to reduce the voltage stabilized at 5V. To complete the storage system at different loads, a Boost power converter module was used which raises and converts the signal from CD to CD, obtaining a voltage output greater than its input, this energy can be stored in batteries and in the same way be used to power any CD device, thus allowing us to save a part of the energy that is consumed when transporting water in a pipe.
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« Structural and Electrochemical Insights into Iron-Based Fluoro(hydroxy)Phosphate axFePO4y (A= Na, Li ; Y= F, OH) As Cathode Materials for Aqueous Batteries ». ECS Meeting Abstracts, 2019. http://dx.doi.org/10.1149/ma2019-01/2/381.

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Guillot, Jordan, et Adolfo Viloria. « Estudio Sobre el Abastecimiento Constante de Energía Eólica ». Investigacion e Innovación en Ingenierias 3, no 2 (1 juillet 2015). http://dx.doi.org/10.17081/invinno.3.2.2028.

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Los generadores eólicos son sistemas de producción de energía renovable, que adquieren su energía de la circulación del aire que pasa a través de sus aspas. Estos sistemas son muy usados a nivel mundial para la generación de energía, convirtiéndose en los más usados. Pero ellos como todos los sistemas de generación de energía renovable, poseen inconvenientes, como es la producción de energía cuando no hay flujo de viento, o como evitar el daño en las baterías por la carga y descarga en los sistemas autónomos. La figura de investigación teórica de laboratorio arrojo que todas estas interrogantes tienen una solución bastante sencilla que es la utilización de un sistema hibrido, el diseño de un sistema de elevación con poca energía para el transporte de la energía suministrada por aerogenerador y la creación de un controlador de carga hibrido especial con un control robusto al momento del suministro de energía. AbstractWind generators are systems of renewable energy production, which get their energy from the flow of air that passes through its blades. These systems are used worldwide to power generation, becoming the most used. But they and all systems of renewable energy generation, have drawbacks, such as energy production when there is no wind flow, or prevent damage to batteries by charging and discharging in autonomous systems. Figure theoretical research laboratory throw all these questions have a rather simple solution is to use a hybrid system, the design of a lifting system with low energy to transport the energy supplied by the wind turbine and the creation of a special hybrid charge controller with a robust control at the time of power supply.
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Pancha, J., V. Rojas, V. Romero et J. Néjer. « Implementation of an Electric Motor for Light River Transportation Units ». ESPOCH Congresses : The Ecuadorian Journal of S.T.E.A.M., 26 août 2021. http://dx.doi.org/10.18502/espoch.v1i1.9559.

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The fluvial transport is the way that allows the development of the communities in post of improve the communication, but its use with combustion engines causes an environmental impact and damage to the ecosystem by emitions, noise pollution or oil spill. In fact, to finding other alternatives to improve operating conditions and reduce environmental impact, the application of electric motors being a new alternative for river transport. In this design, two direct current motors will applied, such as the propulsion of an environmentally friendly light boat coupled with a set of energy accumulators that supply the propulsion system. The applied motors and the type of battery used indicate in the design characteristics. This analysis shows the results obtained in the simulations and designs of the boat in relation to the resistance generated by the displacement in the water and the aerodynamic flow conditions. Keywords: river propulsion, electric. Resumen El transporte en lugares fluviales es un medio importante que permite el desarrollo de las poblaciones impulsando la comunicación entre comunidades, pero su uso con motores de combustión interna provoca un impacto ambiental y daños al ecosistema por emisiones, contaminación acústica o derrame de derivados del petróleo. Esto conlleva a encontrar otras alternativas para mejorar las condiciones de operación y reducir el impacto ambiental siendo la aplicación de motores eléctricos una nueva alternativa para el transporte fluvial. En este diseño aplica dos motores de corriente continua como propulsión de una embarcación ligera amigable con el medio ambiente acoplado con un conjunto de acumuladores de energía que abastecen al sistema de propulsión. Se indica además en las características de diseño los motores aplicados y del tipo de batería usada. En este análisis se muestran los resultados obtenidos en las simulaciones y diseños de la embarcación en relación a la resistencia generada por el desplazamiento en el agua y además las condiciones del flujo aerodinámico. Palabras clave: propulsión fluvial, motor eléctrico, embarcación.
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