Stable Zinc Anodes Enabled by Zincophilic Cu Nanowire Networks

• 作者: Shiyin Xie Yang Li Xu Li Yujun Zhou Ziqi Dang Jianhua Rong Liubing Dong
• 来源期刊: 纳微快报（英文版）
• 年，卷（期）: 2022,（2）
• 页码范围: 311-323
• 页数: 13页
• 语种: 英文

摘要

Zn-based electrochemical energy storage (EES) sys-tems have received tremendous attention in recent years,but their zinc anodes are seriously plagued by the issues of zinc dendrite and side reactions (e.g.,corrosion and hydrogen evolution).Herein,we report a novel strategy of employing zincophilic Cu nanowire networks to stabilize zinc anodes from multiple aspects.According to experimen-tal results,COMSOL simulation and density functional theory cal-culations,the Cu nanowire networks covering on zinc anode surface not only homogenize the surface electric field and Zn2+ concentration field,but also inhibit side reactions through their hydrophobic feature.Meanwhile,facets and edge sites of the Cu nanowires,especially the latter ones,are revealed to be highly zincophilic to induce uniform zinc nucleation/deposition.Consequently,the Cu nanowire networks-protected zinc anodes exhibit an ultralong cycle life of over 2800 h and also can continuously operate for hundreds of hours even at very large charge/discharge currents and areal capacities (e.g.,10 mA cm-2 and 5 mAh cm-2),remarkably superior to bare zinc anodes and most of currently reported zinc anodes,thereby enabling Zn-based EES devices to possess high capacity,16,000-cycle lifespan and rapid charge/discharge ability.This work provides new thoughts to realize long-life and high-rate zinc anodes.