Structure Evolution and Electrochemical Performance of Al_2O_3-coated LiNi_(0.4)Co_(0.2)Mn_(0.4)O_2 During Charge-discharge Cycling

作     者：LIU Hao-han ZHANG Jian LOU Yu-wan YANG Chuan-zheng XIE Xiao-hua XIA Bao-jia 

作者机构：Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050P.R.China 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2012年第28卷第4期

页      面：686-690页

核心收录：

学科分类：080503[工学-材料加工工程] 0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Supported by the Project of Shanghai Committee of Science and Technology China(Nos.1052nm00100 09ZR1437600) 

主　　题：LiNi0.4Co0.2Mn0.4O2 Al2O3-coated Cycling performance Bulk structure 

摘      要：Several lithium-ion batteries of 18650-type were assembled with pristine or Al2O3-coated LiNi0.4Co0.2Mn0.4O2（NCM） as cathode material and mesocarbon microbeads（MCMB） as anode *** cycling performance of the batteries was examined under 25 °C at a 2C rate within a potential range of 2.75―4.20 *** changes of the crystal structure,the lattice parameter,the mean crystallite size,and the mean micro-strain of pristine NCM and Al2O3-coated NCM during the charge-discharge cycling were determined by X-ray diffraction（XRD）.The results indicate that the bulk structure of Al2O3-coated NCM is more stable than that of pristine NCM,which leads to the better cycling performance of Al2O3-coated NCM compared to that of pristine NCM.