Zincophilic Electrode Interphase with Appended Proton Reservoir Ability Stabilizes Zn Metal Anodes

作者：Zhenyue Xing, Yanyan Sun, Xuesong Xie, Yan Tang, Guofu Xu, Junwei Han, Bingan Lu, Shuquan Liang, Gen Chen, Jiang Zhou · 发表于：Angewandte Chemie International Edition · 年份：2022 · DOI：10.1002/anie.202215324 · 被引用次数：245 · 研究领域：Advanced battery technologies research、Advanced Battery Technologies Research、Advanced Battery Materials and Technologies

Abstract The rampant dendrites and hydrogen evolution reaction (HER) resulting from the turbulent interfacial evolution at the anode/electrolyte are the main culprits of short lifespan and low Coulombic efficiency of Zn metal batteries. In this work, a versatile protective coating with excellent zincophilic and amphoteric features is constructed on the surface of Zn metal (ZP@Zn) as dendrite‐free anodes. This kind of protective coating possesses the advantages of reversible proton storage and rapid desolvation kinetics, thereby mitigating the HER and facilitating homogeneous nucleation concomitantly. Furthermore, the space charge polarization effect promotes charge redistribution to achieve uniform Zn deposition. Accordingly, the ZP@Zn symmetric cell manifests excellent reversibility at an ultrahigh cumulative plating capacity of 4700 mAh cm −2 and stable cycling at 80 % depth of discharge (DOD). The ZP@Zn//V 6 O 13 pouch cell also reveals superior cycling stability with a high capacity of 326.6 mAh g −1 .