Zinc‐Bismuth Binary Alloy Enabling High‐Performance Aqueous Zinc Ion Batteries

作者：Yingxiao Du, Feng Yang, Ruotong Li, Zhi Peng, Xinyue Yao, Siying Duan, Shude Liu, Seong Chan Jun, Jing Zhu, Lei Dai, Qi Yang, Ling Wang, Zhangxing He · 发表于：Small · 年份：2023 · DOI：10.1002/smll.202307848 · 被引用次数：131 · 研究领域：Advanced battery technologies research、Advanced Battery Materials and Technologies、Advanced Battery Technologies Research

Abstract Reconfiguration of zinc anodes efficiently mitigates dendrite formation and undesirable side reactions, thus favoring the long‐term cycling performance of aqueous zinc ion batteries (AZIBs). This study synthesizes a Zn@Bi alloy anode (Zn@Bi) using the fusion method, and find that the anode surfaces synthesized using this method have an extremely high percentage of Zn(002) crystalline surfaces. Experimental results indicate that the addition of bismuth inhibits the hydrogen evolution reaction and corrosion of zinc anodes. The finite‐element simulation results indicate that Zn@Bi can effectively achieve a uniform anodic electric field, thereby regulating the homogeneous depositions of zinc ions and reducing the production of Zn dendrite. Theoretical calculations reveal that the incorporation of Bi favors the anode structure stabilization and higher adsorption energy of Zn@Bi corresponds to better Zn deposition kinetics. The Zn@Bi//Zn@Bi symmetric cell demonstrates an extended cycle life of 1000 h. Furthermore, when pairing Zn@Bi with an α‐MnO2 cathode to construct a Zn@Bi//MnO2 cell, a specific capacity of 119.3 mAh g−1 is maintained even after 1700 cycles at 1.2 A g−1. This study sheds light on the development of dendrite‐free anodes for advanced AZIBs.