文献类型：期刊文献

英文题名：NiCo2O4 surface coating Li[Ni0.03Mn1.97]O4 micro-/nano- spheres as cathode material for high-performance lithium ion battery

作者：Ye, Pan[1];Dong, Hui[1];Xu, Yunlong[1];Zhao, Chongjun[1];Liu, Dong[2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ,Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China;[2]Univ Texas Arlington, Dept Mat Sci & Engn, Arlington, TX 76019 USA

年份：2018

卷号：428

起止页码：469

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20174004222831);WOS:【SCI-EXPANDED(收录号:WOS:000415227000059)】；

基金：This work is supported by Shanghai Leading Academic Discipline Project (B502), Shanghai Nanotechnology Special Foundation (No. 11nm0500900) and Shanghai Key Laboratory Project (08DZ2230500).

语种：英文

外文关键词：Lithium-ion battery; NiCo2O4; Coating; Ni doping; LiMn2O4

摘要：Here we report a novel transitional metal oxide (NiCo2O4) coated Li [Ni0.03Mn1.97]O-4 micro-/nano- spheres as high-performance Li-ion battery cathode material. A thin layer of similar to 10 nm NiCo2O4 was formed by simple wet-chemistry approach adjacent to the surface of Li [Ni0.03Mn1.97]O-4 micro-/nano- spheres, leading to significantly enhanced battery electrochemical performance. The optimized sample(1 wt%) not only delivers excellent discharge capacity and cycling stability improvement at both room temperature and elevated temperatures, but also effectively prevents Mn dissolution while retaining its coating structure intact according to XRF and TEM results. The CV and EIS break-down analysis indicated a much faster electrochemical reaction kinetics, more reversible electrode process and greatly reduced charge transfer and Warburg resistance, clearly illustrating the dual role of NiCo2O4 coating to boost electron transport and Li+ diffusion, and alleviation of manganese dissolving. This approach may render as an efficient technique to realize high-performance lithium ion battery cathode material. (c) 2017 Elsevier B.V. All rights reserved.