Releasing Plating Induced Stress for Highly Reversible Aqueous Zn Metal Anodes

作者：Jian-Yu Chen, X. Qiao, Xuran Han, Jinghao Zhang, Hanbo Wu, Qian He, Zibo Chen, Lina Shi, Yizhou Wang, Yannan Xie, Yanwen Ma, Jin Zhao · 发表于：Social Science Research Network · 年份：2022 · DOI：10.2139/ssrn.4169721 · 被引用次数：45

Rechargeable aqueous zinc-ion batteries (ZIBs) have become one of the most potential technology for grid-scale energy storage. But their commercialization has been severely plagued by the uncontrollable dendrite growth and side reactions on planar-structured anodes. Hence developing efficient methods to stabilize Zn anodes is of vital importance. Herein, we reveal that the Zn dendrite growth is strongly associated with the internal stress accumulation during Zn plating. We demonstrate that the patterned micro-grooves on planar Zn metal can effectively release the plating-induced stress and inhibit the dendrite growth. By coupling with Nafion film coating to depress the side reaction, the groove-patterned Zn anodes present ultra-stable cycling over 1200 h at a high current density of 10 mA cm -2 , a low electrochemical polarization for the rate performance range from 1 to 20 mA cm -2 , and stable voltage hysteresis in deep discharge/charge performance at 10 mA cm -2 and 10 mAh cm -2 . The feasibility of our strategy was further exhibited in the Zn | MnO 2 flexible cell, which delivers an impressive capacity of 186 mAh