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

通信作者：Guo, JB[1];Wu, HM[2];Guo, JB[2]

机构：[1]Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Guizhou, Peoples R China;[2]Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R China;[3]Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang 550003, Peoples R China;[4]Guiyang Univ, Coll Chem & Mat Engn, Guiyang 550005, Peoples R China

第一机构：Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Guizhou, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Guizhou, Peoples R China;corresponding author), Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R 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：;WOS:【SCI-EXPANDED(收录号:WOS:000715007100004)】；

基金：Authors gratefully acknowledge financial support from Science and Technology Project of Guizhou (2016/5667) and (2021488), Science and Technology Foundation of Guizhou Province (2019/5635, Natural Science Foundation of China (52063005).

语种：英文

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

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.