电解质
材料科学
化学工程
聚乙烯醇
乙二醇
离子电导率
阳极
聚合物
电导率
功率密度
电极
复合材料
化学
功率(物理)
物理化学
物理
量子力学
工程类
作者
Yafen Zheng,Dongling Wu,Tao Wang,Qian Liu,Dianzeng Jia
标识
DOI:10.1002/anie.202418223
摘要
Despite ongoing challenges, achieving further breakthroughs in the development of gel polymer electrolytes with a wide temperature range, excellent liquid retention capability and enhanced anode compatibility in flexible zinc‐air batteries (FZABs) remains a significant objective. This study presents a significant advancement in the development of choline chloride/ethylene glycol‐polyvinyl alcohol (ChCl/EG‐PVA) eutectogel electrolyte, tailored for high‐performance operation across a wide temperature range. Systematic in‐situ and ex‐situ characterizations and theoretical simulations confirm the formation of robust hydrogen bonding and denser polymer cross‐linked networks within the prepared eutectogel, leading to enhanced liquid retention ability (93.7% after 96 h exposure to air) and the ion transport capacity (ionic conductivity of 171.3 mS cm‐1). Additionally, the zincophilicity nature of the choline cation in eutectogel effectively suppresses dendrites growth. The assembled FZAB utilizing this eutectogel electrolyte achieves a peak power density of 109.3 mW cm‐2 and a cycle life of 90 h. Notably, the power density of FZAB is maintained as high as 38.2 mW cm‐2 at ‐40 oC and 63.2 mW cm‐2 at 50 oC, demonstrating its prominent suitability for applications in extreme temperature conditions. The design of eutectogel provides a novel way to achieve the high‐performance FZAB.
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