AgxZny Protective Coatings with Selective Zn2+/H+ Binding Enable Reversible Zn Anodes

作者：Jiaxian Zheng, Xin Liu, Yu‐Guo Zheng, Appala Naidu Gandi, Xiaoxiao Kuai, Zhoucheng Wang, Yunpei Zhu, Zechao Zhuang, Hanfeng Liang · 发表于：Nano Letters · 年份：2023 · DOI：10.1021/acs.nanolett.3c01706 · 被引用次数：110 · 研究领域：Advanced battery technologies research、Electrocatalysts for Energy Conversion、Perovskite Materials and Applications

Zinc (Zn) metal anodes suffer from the dendrite growth and hydrogen evolution reaction (HER) in classical aqueous electrolytes, which severely limit their lifespan. We propose a rational design of Ag x Zn y protective coatings with selective binding to Zn 2+ against H + to simultaneously regulate the Zn growth pattern and the HER kinetics. We further demonstrate that by tuning the composition of the Ag x Zn y coating the Zn deposition behavior can be readily tuned from the conventional plating/stripping (on Zn-AgZn 3 coating) to alloying/dealloying (on Ag-AgZn coating), resulting in precise control of the Zn growth pattern. Moreover, the synergy of Ag and Zn further suppresses the competitive HER. As a result, the modified Zn anodes possess a significantly enhanced lifespan. This work provides a new strategy for enhancing the stability of Zn and potentially other metal anodes by precisely manipulating the binding strength of protons and metal charge carriers in aqueous batteries.