Operando Observation of Structural Evolution and Kinetics of Li[Ni0.6Co0.2Mn0.2]O2 at Elevated Temperature  

作　　者：ZHANG Guobin PAN Xuelei YU Kesong YAN Mengyu XIONG Fangyu WU Liming DENG Xuanwci ZHANG Haining MAI Liqiang 

机构地区：[1]State Key Laboratory of Advanced Technology for Matehals Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,P.R.China [2]Department of Mechanical Engineering,City University of Hong Kong,Hong Kong 999077,P.R.China [3]Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory,Xianhu Hydrogen Valley,Foshan 528200,P.R.China

出　　处：《Chemical Research in Chinese Universities》2020年第4期690-693,共4页高等学校化学研究（英文版）

基　　金：Supported by the Project of the Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory,China(No.XH12020-003);the National Natural Science Foundation of China(No.51521001);the National Key Research and Development Program of China(No.2016YFA0202603);the Fundamental Rescarch Funds for the Central Universities of China(No.WUT:205201019)。

摘　　要：Li[Ni0.6Co0.2Mn0.2]O2(NCM622)is one of the best commercialized cathodes in the battery field.However,poor cyclability at relatively high temperature hinders its multiple usages.Here,operando tests were performed to investigate the phase transitions and electron/ion transfer process of lavered NCM622 at 25 and 55℃.The identified spinel structure resulting in the poor cyclability at 55℃ guides the commercialization of batteries at high temperature.

关 键 词：Lithium-ion battery NCM622 High temperature In situ X-ray diffraction(XRD) 

分 类 号：TM91[电气工程—电力电子与电力传动]