文献类型：期刊文献

英文题名：Zn-Y co-doped LiNi0.5Mn1.5O4 cathode materials with high electrochemical performance

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

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

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

年份：2023

卷号：941

外文期刊名：Journal of Alloys and Compounds

收录：EI(收录号：20230513471036);Scopus(收录号：2-s2.0-85146983020)

语种：英文

外文关键词：Binary alloys - Cathodes - Electric discharges - Lithium-ion batteries - Sol-gel process - Sol-gels

摘要：The LiNi0.5?xZnxMn1.48Y0.02O4 (x = 0.01, 0.03, 0.05) series were prepared via a sol-gel method. The mechanism of the Zn2+ and Y3+ co-doping on the structural morphology and Mn3+ ion dissolution, which led to the improved electrochemical performance of the LiNi0.5Mn1.5O4 (LNMO) sample, were studied. Compared with the pristine LNMO, Zn-Y co-doping led to increased lattice parameters, morphological evolution, decreased Mn3+ content, and better electrochemical properties. Among all the samples, LiNi0.47Zn0.03Mn1.48Y0.02O4 (0.03ZnY) showed optimal electrochemical properties at room temperature and elevated temperature. After 200 cycles, the 0.03ZnY sample showed excellent cycling performance, i.e., 134.529 mAh g?1 at 1 C (with a capacity retention of 94.7%), which was higher than the pristine sample (104.913 mAh g?1, with a capacity retention of 92.7%). Furthermore, when tested at 1 C, at a high temperature (55 °C), the 2.03Zn-Y sample reached a discharge capacity of 94.004 mAh g?1 and maintained a 79.6% capacity retention after 120 cycles, which was higher than the pristine sample (52.430 mAh g?1, 43.6% capacity retention). ? 2023 Elsevier B.V.