Zinc-Ferricyanide Flow Batteries Operating Stably under -10 °C.

Autor: Zhi L; Division of Energy Storage, Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.; University of Chinese Academy of Sciences, Beijing, 100049, China., Liao C; Laboratory of Molecular Modeling and Design, State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical Physics, Chinese Academy of Science, 457 Zhongshan Road, Dalian, 116023, China., Xu P; Division of Energy Storage, Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.; Key Laboratory of Long-Duration and Large-Scale Energy Storage, Chinese Academy of Sciences, Dalian, 116023, China., Li G; Laboratory of Molecular Modeling and Design, State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical Physics, Chinese Academy of Science, 457 Zhongshan Road, Dalian, 116023, China., Yuan Z; Division of Energy Storage, Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.; Key Laboratory of Long-Duration and Large-Scale Energy Storage, Chinese Academy of Sciences, Dalian, 116023, China., Li X; Division of Energy Storage, Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2024 Dec 16; Vol. 63 (51), pp. e202412559. Date of Electronic Publication: 2024 Oct 24.
DOI: 10.1002/anie.202412559
Abstrakt: Alkaline ferri/ferro-cyanide-based flow batteries are well suited for energy storage because of their features of high electrochemical activity, good kinetics and low material cost. However, they suffer from low energy density and poor temperature adaptability. The ferri/ferro-cyanide catholyte exhibits low solubility (~0.4 M at 25 °C) in NaOH- or KOH-based supporting electrolyte and can easily form precipitates below room temperature. Here we report a lithium-based supporting electrolyte that significantly enhances the solubility of ferrocyanide. The use of LiOH intensifies the ion-dipole interaction between water molecules and solutes and cripples polarization among ferrocyanide ions. Thus, we have achieved a ferrocyanide-based catholyte of 1.7 M at 25 °C and of 0.8 M at -10 °C. A zinc-ferricyanide flow battery based on the lithium-based supporting electrolyte demonstrates a steady charge energy of ~72 Wh L -1 catholyte at 25 °C, and maintains stable for ~4200 cycles (~4200 hours). Furthermore, it remains stable for ~800 cycles (~800 hours) at -10 °C.
(© 2024 Wiley-VCH GmbH.)
Databáze: MEDLINE
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