文献类型：期刊文献

英文题名：Zn-Y Co-Doping Lini0.5mn1.5o4 Cathode Materials with High Electrochemical Performance

作者：Chen, Tianchi Guo, Jianbing Lin, Fangchang Wu, Hongming Song, Jiling Zhou, Dengfeng

第一作者：Chen, Tianchi

机构：[1] Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China; [2] National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang, 550014, China; [3] School of Materials and Energy Engineering, Guizhou Institute of Technology, Guiyang, 550003, China

第一机构：Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220180614)

语种：英文

外文关键词：Binary alloys - Cathodes - Electric discharges - Electrochemical properties - Lithium compounds - Sol-gel process - Sol-gels

摘要：LiNi0.5-xZnxMn1.48Y0.02O4 (x=0.01, 0.03, 0.05) were prepared via sol-gel method. The action of mechanism that the Zn2+ and Y3+ co-doping on morpho-structural and Mn3+ ion dissolution behaviors to improve the electrochemical performance of LiNi0.5Mn1.5O4 sample is revealed. Compared with the pristine LNMO, Zn-Y co-doping samples process the increased lattice parameters, morphological evolution and decreased Mn3+ contents, and have better electrochemical properties. Among all samples, LiNi0.47Zn0.03Mn1.48Y0.02O4 (0.03Zn-Y) sample displays optimal electrochemical property at room temperature and elevated temperature. After 200 cycles, the 0.03Zn-Y sample still has excellent cycling performance of 134.529 mAh g-1 at 1C (capacity retention is 94.7%), higher than that of pristine sample (104.913 mAh g-1, capacity retention is 92.7%). Besides, when tested at 1C at high temperature (55°C)and after 120 cycles, the 0.03Zn-Y sample reached a discharge capacity of 94.004 mAh g-1 and maintained 79.6% capacity retention, higher than pristine sample(52.430 mAh g-1, 43.6% capacity retention). ? 2022, The Authors. All rights reserved.