Unraveling the reaction mechanisms of electrode materials for sodiumion and potassium‐ion batteries by in situ transmission electron microscopy

作     者：Hong Wang Fang Liu Ruohan Yu Jinsong Wu 

作者机构：Nanostructure Research Center(NRC)Wuhan University of TechnologyWuhanHubeiChina State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingSchool of Materials Science and EngineeringWuhan University of TechnologyWuhanHubeiChina School of Mathematics and PhysicsJingchu University of TechnologyJingmenHubeiChina 

出 版 物：《Interdisciplinary Materials》 (交叉学科材料（英文）)

年 卷 期：2022年第1卷第2期

页      面：196-212页

核心收录：

学科分类：07[理学] 070304[理学-物理化学(含∶化学物理)] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：This work was supported by the National Natural Science Foundation of China(52072282) The authors also wish to acknowledge support from the National Key Research and Development Program of China(2019YFA0704900) the Fundamental Research Fund for the Central Universities(WUT:2021III016GX). 

主　　题：in situ transmission electron microscopy potassium ion batteries sodiumion batteries 

摘      要：Sodium ion batteries(SIBs)and potassium ion batteries(PIBs)have caught numerous attention due to the low cost and abundant availability of sodium and potassium.However,their power density,cycling stability and safety need further improvement for practical applications.Investigations on the reaction mechanisms and structural degradation when cycling are of great importance.In situ transmission electron microscopy(TEM)is one of the most significant techniques to understand and monitor electrochemical processes at an atomic scale with real-time imaging.In this review,the current progress in unraveling reaction mechanisms of electrode materials for SIBs and PIBs via in situ TEM is summarized.First,the importance of in situ TEM is highlighted.Then,based on the three types of electrochemical reaction,i.e.,intercalation reac-tion,conversion reaction and alloying reaction,the structural evolution and reaction kinetics at atomic resolution,and their relation to the electrochemical performance of electrode materials are reviewed and described in detail.Fi-nally,future directions of in situ TEM for SIBs and PIBs are proposed.Therefore,the in‐depth understanding revealed by in situ TEM will give an instructive guide in rational design of electrode materials for high performance electrode materials of SIBs and PIBs.