On-site building of a Zn2＋-conductive interfacial layer via short-circuit energization for stable Zn anode

• 作者: Ping Xiao Lanlan Xue Yanpeng Guo Lintong Hu Can Cui Huiqiao Li Tianyou Zhai
• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: ARTICLES
• 页码范围: 545-552
• 页数: 8页
• 语种: 英文

摘要

Aqueous zinc ion batteries(ZIBs)show great potential in large-scale energy storage systems for their advantages of high safety,low cost,high capacity,and environmental friendliness.However,the poor performance of Zn metal anode seriously hinders the application of ZIBs.Herein,we use the zinc-ion intercalatable V2O5 nH2O(VO)as the interface modification material,for the first time,to on-site build a Zn2+-conductive ZnxV2O5.nH2O(ZnVO)interfacial layer via the spontaneous short-circuit reaction between the pre-fabricated VO film and Zn metal foil.Compared with the bare Zn,the ZnVO-coated Zn anode exhibits better electrochemical performances with dendrite-free Zn deposits,lower polarization,higher coulombic efficiency over 99％after long cycles and 10 times higher cycle life,which is confirmed by constructing Zn symmetrical cell and Zn|ZnSO4+Li2SO4|LiFePO4 full cell.