锌
电解质
电化学
溶剂化
化学
位阻效应
化学工程
阳极
水溶液
无机化学
电偶阳极
材料科学
溶剂
阴极保护
电极
有机化学
物理化学
工程类
作者
Die Luo,Xinyu Ma,Pan Du,Chen Zuo,Qiurui Lin,Yuhan Liu,Ben Niu,Xianru He,Xin Wang
标识
DOI:10.1002/anie.202401163
摘要
Aqueous zinc‐metal batteries are prospective energy storge devices due to their intrinsically high safety and cost effectiveness. Yet, uneven deposition of zinc ions in electrochemical reduction and side reactions at the anode interface significantly hinder their development and application. Here, we propose a solvation‐interface attenuation strategy enabled by a frustrated tertiary amine amphiphilic dipolymer electrolyte additive. The configuration of superhydrophilic segments with covalently bonded lipophilic spacers enables coupled steric hindrance/coordination, which establishes a balanced push‐pull dynamic of dipolymer‐H2O‐Zn2+. Such interplay reconstructs the solvation structure of Zn2+ and allows the formation of a stable dipolymer‐inorganic hybrid solid electrolyte interface (SEI) layer. This SEI layer effectively shields the zinc‐metal anode from water and anions, significantly reducing side reactions. In addition, the dipolymer adsorbed at the zinc‐metal anode interface regulates the interfacial electrochemical reduction kinetics and ensures uniform zinc deposition. As a result, the Zn‐Zn symmetric cells with dipolymer‐containing electrolyte exhibit remarkable cycling stability exceeding 5800 h (242 days). The Zn‐NVO batteries and Zn‐AC hybrid ion supercapacitors also deliver stable cycling for up to 1440 h (60 days) with high‐capacity retention over 80%. This research demonstrates the potential to facilitate the development and commercialization of zinc‐based energy storage devices.
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