Electrochemical properties of ZrO2-coated LiNi0.8Co0.2O2 cathode materials

被引：61
作者：
Lee, Sang Myoung
Oh, Si Hyoung
Ahn, Jae Pyoung
Cho, Won Il
Jang, Ho
机构：
[1] Korea Univ, Coll Engn, Dept Adv Mat Engn, Seoul 136713, South Korea
[2] Korea Inst Sci & Technol, Secondary Battery Res Ctr, Seoul 136791, South Korea
[3] Korea Inst Sci & Technol, Met & Mat Reliabil Evaluat Ctr, Seoul 136791, South Korea
来源：
JOURNAL OF POWER SOURCES | 2006年 / 159卷 / 02期
关键词：
LiNi0.8Co0.2O2; zirconium oxide; coating; lithium ion batteries;
D O I：
10.1016/j.jpowsour.2005.12.035
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effect of a ZrO2 coating on the structure and electrochemical properties of the cathode material LiNi0.8Co0.2O2 was investigated using EPMA, TEM, XRD, and electrochemical impedance spectroscopy (EIS). In particular, we focused on the distribution of the ZrO2 on the particle surface to study the relationship between electrochemical properties of the coated cathode and the distribution of the coating materials in the particle. Based on the results from composition analysis and electrochemical tests, it was found that the coating layer consisted of nano-sized ZrO2 particles attached nonuniformly to the particle surface and the ZrO2 layer significantly improved the electrochemical properties of the cathode by suppressing the impedance growth at the interface between the electrodes and the electrolyte. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：1334 / 1339
页数：6
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