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

作　　者：Jinghao Li Kehan Le Wei Wei 

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China [2]International School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China [3]School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China

出　　处：《Journal of Materials Science & Technology》2022年第7期272-277,共6页材料科学技术（英文版）

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

摘　　要：The safety and cycle lifespan of zinc metal-based aqueous batteries are greatly restricted by zinc anode.The 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 studies.Herein,a roughness gradient is constructed on the zinc anode surface by a simple grinding and pasting method.It has been found the modified zinc anodes with lower surface roughness exhibit the smaller zinc deposition overpotential and longer cycle life.Further,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 batteries.The Zn anode dendrite-suppressing mechanism via surface roughness engineering was revealed through finite element computational simulation.These 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.

关 键 词：Surface roughness Zn metal anode Surface engineering Aqueous zinc-ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动]