电解质
材料科学
接口(物质)
电极
锌
化学工程
工程物理
复合材料
化学
冶金
物理化学
毛细管作用
毛细管数
工程类
作者
Zefang Yang,Qi Zhang,Tingqing Wu,Qinke Li,Jiameng Shi,Jinqiu Gan,Shaoe Xiang,Hao Wang,Chao Hu,Yougen Tang,Haiyan Wang
标识
DOI:10.1002/anie.202317457
摘要
Quasi-solid zinc-ion batteries using hydrogel electrolytes show great potential in energy storage devices owing to their intrinsic safety, fewer side reactions and wide electrochemical windows. However, the dendrite issues on the zinc anodes cannot be fundamentally eliminated and the intrinsic anode-electrolyte interfacial interspace is rarely investigated. Here, we design a dynamically healable gelatin-based hydrogel electrolyte with a highly reversible sol-gel transition, which can construct a conformal electrode-electrolyte interface and further evolve into a stable solid-solid interface by in situ solidification. The unique helical gelatin chain structure provides a uniform channel for zinc ion transport by the bridging effect of sulfate groups. As a consequence, the dynamically healable interface enables dendrite-free zinc anodes and repeatedly repairs the anode-electrolyte interfacial interspaces by the reversible sol-gel transition of gelatin electrolyte to retain long-lasting protection for sustainable zinc-ion batteries.
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