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A New Fe/V Redox Flow Battery Using a Sulfuric/Chloric Mixed‐Acid Supporting Electrolyte
Author(s) -
Wang Wei,
Nie Zimin,
Chen Baowei,
Chen Feng,
Luo Qingtao,
Wei Xiaoliang,
Xia GuanGuang,
SkyllasKazacos Maria,
Li Liyu,
Yang Zhenguo
Publication year - 2012
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201100527
Subject(s) - flow battery , redox , electrolyte , materials science , separator (oil production) , electrochemistry , energy storage , sulfuric acid , battery (electricity) , inorganic chemistry , microporous material , chemical engineering , electrode , analytical chemistry (journal) , chemistry , thermodynamics , composite material , chromatography , metallurgy , power (physics) , physics , engineering
A redox flow battery using Fe 2+ /Fe 3+ and V 2+ /V 3+ redox couples in chloric/sulfuric mixed‐acid supporting electrolyte is investigated for potential stationary energy storage applications. The Fe/V redox flow cell using mixed reactant solutions operates within a voltage window of 0.5–1.35 V with a nearly 100% utilization ratio and demonstrates stable cycling over 100 cycles with energy efficiency >80% and no capacity fading at room temperature. A 25% improvement in the discharge energy density of the Fe/V cell is achieved compared with a previously reported Fe/V cell using a pure chloride acid supporting electrolyte. Stable performance is achieved in the temperature range between 0 and 50 °C as well as when using a microporous separator as the membrane. The improved electrochemical performance makes the Fe/V redox flow battery a promising option as a stationary energy storage device to enable renewable integration and stabilization of the electric grid.