Enabling a stable and dendrite-suppressed Zn anode via facile surface roughness engineering

作     者：Jinghao Li Kehan Le Wei Wei Jinghao Li;Kehan Le;Wei Wei

作者机构：State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第102卷第7期

页      面：272-277页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China (51904216) the National Innovation and Entrepreneurship Training Program for College Students (202010497002, 202010497004) 

主　　题：Surface roughness Zn metal anode Surface engineering Aqueous zinc-ion batteries 

摘      要：The safety and cycle lifespan of zinc metal-based aqueous batteries are greatly restricted by zinc *** poor cycling performance of zinc metal anode is often considered to be impacted by the dendrite growth,surface passivation,zinc metal corrosion and hydrogen evolution reaction,while surface roughness is a matter that has often been ignored in past ***,a roughness gradient is constructed on the zinc anode surface by a simple grinding and pasting *** has been found the modified zinc anodes with lower surface roughness exhibit the smaller zinc deposition overpotential and longer cycle ***,in situ optical microscopy photographs indicate that the zinc anode with an optimized roughness enables more uniform distribution of zinc precipitation and corrosion sites,which will facilitate a stable cycling performance of aqueous zinc ion *** Zn anode dendrite-suppressing mechanism via surface roughness engineering was revealed through finite element computational *** results emphasize the effectiveness of roughness engineering for tuning the surface physics of Zn anode and provide a facile strategy to develop better and safer aqueous zinc ion batteries.