Iron-Vanadium Redox Flow Batteries Electrolytes: Performance Enhancement of Aqueous Deep Eutectic Solvent Electrolytes via Water-Tuning

Electrochimica Acta, Journal Year: 2024, Volume and Issue: 504, P. 144926 - 144926

Published: Aug. 23, 2024

Language: Английский

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Enhancing vanadium flow battery performance via trapezoidal channel design: An experimental validation and parametric investigation

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 119, P. 116346 - 116346

Published: March 23, 2025

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Electrolyte Optimization for Anthraquinone-Based Slurry Batteries

Processes, Journal Year: 2025, Volume and Issue: 13(5), P. 1403 - 1403

Published: May 4, 2025

AQ suspensions show strong potential as organic anodes for Li-ion slurry batteries. However, the influence of electrolyte composition on electrochemical behavior lacks systematic investigation. We explored effects different lithium salts and solvents in redox material electrode. An (1 M LiTFSI dissolved DME: DOL with a volume ratio 1:1) optimized batteries exhibits stable 2.3 V charge/discharge platform delivering discharge specific capacity 246.2 mAh g−1 at 1.25 A (approaching theoretical value) reactor operation over 47 h. This work establishes structure-property relationship between formulation electrode performance, offering design principle selection slurry-based battery systems.

Language: Английский

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Spectroelectrochemical study of carbon structural and functionality characteristics on vanadium redox reactions for flow batteries

Materials Advances, Journal Year: 2024, Volume and Issue: 5(18), P. 7170 - 7198

Published: Jan. 1, 2024

Vanadium redox flow batteries have applications for large-scale electricity storage. This paper reports the influence of carbon structural characteristics sustainable walnut shell-derived carbons in carbon/polyvinylidene fluoride composite electrodes on vanadium reactions. Pyrolysis, gasification, and chemical treatment procedures were used to modify carbons. Carbon functional groups modified by with HNO

Language: Английский

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Sensitivity of Capacity Fade in Vanadium Redox Flow Battery to Electrolyte Impurity Content

ChemPlusChem, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 21, 2024

Abstract The gradual capacity decrease of vanadium redox flow battery (VRFB) over long‐term charge‐discharge cycling is determined by electrolyte degradation. While it was initially believed that this degradation solely caused crossover, recent research suggests oxidative imbalance induced hydrogen evolution reaction (HER) also plays a significant role. In work using pentoxides with different impurities content, we prepared three grades electrolyte. By measuring electrochemical properties on carbon felt electrode in three‐electrode cell and VRFB membrane‐electrode assembly evaluate the influence impurity content polarization rate side reactions which indicated increase average oxidation state ( AOS ) during tests varies from 0.061 to 0.027 day −1 for electrolytes made 99.1 99.9 wt % V 2 O 5 . We found correlates open‐circuit voltage discharged ranging 9.6 14.9 mV highest lowest purity levels, respectively. significant, does not determine fade. It demonstrated presence crossover decreases fade, i. e. levels contribution drop.

Language: Английский

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Preparation of V4+electrolyte by nanofluid-based electrocatalytic reduction of V2O5 for vanadium redox flow batteries

Electrochimica Acta, Journal Year: 2024, Volume and Issue: unknown, P. 145532 - 145532

Published: Dec. 1, 2024

Language: Английский

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Blending deep-learning and observers for improved state of charge estimation in vanadium flow batteries

ISA Transactions, Journal Year: 2024, Volume and Issue: 157, P. 620 - 630

Published: Dec. 19, 2024

Language: Английский

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