Stable zinc metal anodes achieved by dynamic counteracting tip effect and interfacial ion redistribution  

作　　者：Leilei Sun Yang Wang Kun Zhang Bin Luo Guosheng Duan Sinan Zheng Zhean Bao Jingyun Huang Zhizhen Ye 

机构地区：[1]State Key Laboratory of Silicon and Advanced Semiconductor Materials,School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China [2]Institute of Wenzhou,Zhejiang University,Wenzhou 325006,Zhejiang,China [3]Institute of Thermal Science and Power Systems,Zhejiang University,Hangzhou 310027,Zhejiang,China

出　　处：《Journal of Energy Chemistry》2024年第12期172-181,共10页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China (52172159);the Postdoctoral Fellowship Program of CPSF (GZB20230631)。

摘　　要：Aqueous zinc metal batteries (AZMBs) are hindered by uncontrolled dendrites and side reactions during commercialization,despite their advantages of safety and high capacity density.Herein,we propose the electrical feedback strategy to restrain the Zn dendrites resulting from the"tip effect"and optimize interfacial Zn^(2+)distribution to accelerate electrodeposition kinetics by using the lithium niobate (LNO) layer.Specifically,at the bumps of the zinc anode,the ferroelectric LNO is polarized by the locally strong electric field,which in turn counteracts the"tip effect".In this way,the dynamic polarization of LNO can repair the uneven tip electric field to achieve uniform and flat zinc deposition.In addition,owing to the interaction between Nb and Zn^(2+),a higher concentration of Zn^(2+)near the zincophilic LNO@Zn surface is obtained for the rapid electrochemical reaction kinetics of plating.Considering the aforementioned advantages,the LNO@Zn anode harvests stable cycling over 1200 h at 10 mA cm^(-2)with a superior cumulative capacity of 5800 mAh cm^(-2).Assembled with the a-MnO_(2) cathode,the full cell using LNO@Zn anode exhibits the slower capacity decay (0.054%per cycle) during 1000 cycles.This strategy provides a perspective for stabilizing zinc metal anodes through dynamic electrical response and interfacial ion redistribution effect.

关 键 词：Zinc dendrite Tip effect Electrical feedback Ion distribution Anode optimization 

分 类 号：TM912[电气工程—电力电子与电力传动] O646.542[理学—物理化学]