文献类型：期刊文献

英文题名：The Cu–Y co-doping LiNi0.5Mn1.5O4 with modified morphology and enhanced electrochemical property for a 5?V lithium-ion battery

作者：Lin, Fangchang Wu, Hongming Chen, Tianci Xu, Dinghong Zhou, Dengfeng Yan, Wei Guo, Jianbing

第一作者：Lin, Fangchang

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 Metallurgical Engineering, Guizhou Institute of Technology, Guiyang, 550003, China; [4] College of Chemistry and Materials Engineering, Guiyang University, Guiyang, 550005, 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;National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang, 550014, China

年份：2022

卷号：33

期号：1

起止页码：283-297

外文期刊名：Journal of Materials Science: Materials in Electronics

收录：EI(收录号：20214511134030);Scopus(收录号：2-s2.0-85118558053)

语种：英文

外文关键词：Morphology - Lithium compounds - Ions - Transition metals - Lithium-ion batteries - Manganese compounds - Diffusion - Copper compounds - Electric discharges - Nickel compounds - Sols

摘要：LiNi0.5?xCuxMn1.48Y0.02O4 (x = 0.02, 0.03, 0.04) and LiNi0.5Mn1.5O4 (LNMO) samples were prepared successfully via the sol–gel method. The lattice parameter and the degree of Ni/Mn disorder for LNMO samples were increased by doping Cu2+ and Y3+ ions, which is benefit for improving lithium-ion diffusion rate. The Cu–Y co-doped samples possessed truncated octahedral morphologies with (111) facet and exposed (100) facet by modified the co-doped Cu–Y content. The (100) facet helped to accelerate the Li+ ion diffusion while the (111) facet inhibited the dissolution of transition metals at the solid interface. The LiNi0.47Cu0.03Mn1.48Y0.02O4 (0.03 Cu–Y) sample exhibited high initial discharge specific capacity of 145.7 mAh g?1 which was far higher than that of pristine sample (113.8 mAh g?1). After 100 cycles at 1 C, the 0.03 Cu–Y sample retained discharge specific capacity of 137.2 mAh g?1 with superior retention of 96.79% while the undoped sample only retained 108.8 mAh g?1 and the retention is 95.79% at the same condition. The improved electrochemical property of the Cu–Y co-doped sample maybe attribute to the stable structure that decrease Ohmic polarization and the suitable morphology that is conducive to accelerate the Li+ ion diffusion. ? 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.