Reconstruction of zinc-metal battery solvation structures operating from −50 ~ +100 °C

Lingbo Yao, Jiahe Liu, Feifan Zhang, Bo Wen, Xiaowei Chi () and Yu Liu ()
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Lingbo Yao: Chinese Academy of Sciences
Jiahe Liu: Chinese Academy of Sciences
Feifan Zhang: Chinese Academy of Sciences
Bo Wen: Chinese Academy of Sciences
Xiaowei Chi: Chinese Academy of Sciences
Yu Liu: Chinese Academy of Sciences

Nature Communications, 2024, vol. 15, issue 1, 1-14

Abstract: Abstract Serious solvation effect of zinc ions has been considered as the cause of the severe side reactions (hydrogen evolution, passivation, dendrites, and etc.) of aqueous zinc metal batteries. Even though the regulation of cationic solvation structure has been widely studied, effects of the anionic solvation structures on the zinc metal were rarely examined. Herein, co-reconstruction of anionic and cationic solvation structures was realized through constructing a new multi-component electrolyte (Zn(BF4)2-glycerol-boric acid-chitosan-polyacrylamide, simplified as ZGBCP), which incorporates double crosslinking network via the esterification, protonation and polymerization reactions, thereby combining multiple advantages of ‘liquid-like’ high conductivity, ‘gel-like’ robust interface, and ‘solid-like’ high Zn2+ transfer number. Based on the ZGBCP electrolyte, the Zn anodes achieve record-low polarization and stable cycling. Furthermore, the ZGBCP electrolyte renders the AZMBs ultrawide working temperature (−50 °C ~ +100 °C) and ultralong cycle life (30000 cycles), which further validates the feasibility of the dual solvation structure strategy and provides a innovative perspective for the development of high-performance AZMBs.

Date: 2024
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DOI: 10.1038/s41467-024-50219-x

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