文献类型：期刊文献

英文题名：The Synergetic Effect of LiMg0.5Mn1.5O4 Coating and Mg2+ Doping on Improving Electrochemical Performances of High-Voltage LiNi0.5Mn1.5O4 by Sol-Gel Self-Combustion Method

作者：Li, Xuan Zhang, Yanhua Li, Wanpeng Qiao, Yingjun Shang, Huimin Ge, Wujie Qu, Meizhen Fan, Weifeng Xie, Zhengwei

第一作者：Li, Xuan

通信作者：Fan, WF[1];Xie, ZW[2]

机构：[1]Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu 610041, Peoples R China;[2]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[3]Chinese Acad Sci, Chengdu Organ Chem Co Ltd, Chengdu 610041, Peoples R China;[4]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;[5]Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu Organ Chem Co Ltd Chinese Acad Sci, Chengdu 610041, Peoples R China

第一机构：Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu 610041, Peoples R China

通信机构：corresponding author), Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu 610041, Peoples R China;corresponding author), Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu Organ Chem Co Ltd Chinese Acad Sci, Chengdu 610041, Peoples R China.

年份：2020

卷号：5

期号：8

起止页码：2593-2601

外文期刊名：CHEMISTRYSELECT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000516865300034)】；

基金：This work was supported by the National Natural Science Foundation of China [Grant No. 21805053] and the Natural Science Foundation of Guizhou Province [Grant No. [2019]1132].

语种：英文

外文关键词：Cycling performance; LiNi0; 5Mn1; 5O(4); Lithium-ion batteries; Spinel; Synergetic effect

摘要：The composites of LiNi0.5Mn1.5O4 (LNMO) modified with LiMg0.5Mn1.5O4 (LMgMO) named LNMO@LMgMO as cathode materials for lithium ion battery that can withstand high voltage and high temperature were prepared by a sol-gel self-combustion method. The results of physical characterization show that the LMgMO layer was effectively coated on the surface of LNMO, and the Mg2+ was also doped into the lattice of LNMO. Electrochemical tests reveal that the LNMO@LMgMO composites deliver excellent electrochemical performance, especially for LNMO@LMgMO-1%, including great capacity retention (91.4% for 500 cycles at 25 degrees C and 90.4% for 100 cycles at 55 degrees C at 2 C in the 3.5-5.2 V) and superior rate capability (95.6 mAh g(-1) under 10 C). Moreover, the synergetic effect of LMgMO coating and Mg2+ doping could alleviate the impedance rise.