Surface Structure and Electrochemical Performance of ZnO Coated LiNi_1/3Co_1/3Mn_1/3O₂

Authors

Chang-wei LIU, College of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;
Yu WANG, College of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;
Yu-zhong GUO, College of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;
Lu-lu DAN, College of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;
Jian-hua WANG, College of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;Follow

Corresponding Author

Jian-hua WANG(wjianna@163.com)

Abstract

The surface of LiNi_1/3Co_1/3Mn_1/3O₂ particles were modified by ZnO. Surface structure and electrochemical properties of the coated materials were investigated by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical tests. The results show that a ZnO coating affects the surface composition of LiNi_1/3Co_1/3Mn_1/3O₂ particles. The surface contents of nickel and manganese increase with the amount of ZnO coating. ZnO can react with LiNi_1/3Co_1/3Mn_1/3O₂ and a complex oxide is formed during the heat-treatment at above 400 ^oC. The electrochemical studies suggest that a ZnO coating hinder the electrochemical reactions near 3.6 V for pristine sample. The initial columbic efficiency is significantly enhanced by coating LiNi_1/3Co_1/3Mn_1/3O₂ with 2% (by mass) ZnO, which delivers high discharge capacity and shows excellent capacity retention at 55 ^oC/0.5C.

Graphical Abstract

Keywords

LiNi1/3Co1/3Mn1/3O2, coating, surface, lithium ion battery

DOI Link

https://doi.org/10.13208/j.electrochem.121024

Publication Date

2014-02-25

Online Available Date

2014-02-24

Revised Date

2013-01-19

Received Date

2012-10-24

Recommended Citation

Chang-wei LIU, Yu WANG, Yu-zhong GUO, Lu-lu DAN, Jian-hua WANG. Surface Structure and Electrochemical Performance of ZnO Coated LiNi_1/3Co_1/3Mn_1/3O₂[J]. Journal of Electrochemistry, 2014 , 20(1): 60-65.
DOI: 10.13208/j.electrochem.121024
Available at: https://jelectrochem.xmu.edu.cn/journal/vol20/iss1/11