Effect of TiO2-coating on structure and electrochemical performance of LiCo0.2Ni0.4Mn0.4O2
Xiao YANG 1Youyuan HUANG 1Henghui ZHOU 1Jitao CHEN 1Xinxiang ZHANG1
作者信息
- 1. College of Chemistry, and Molecular Engineer, Peking University, Beijing 100871, China
- 折叠
Abstract
LiCo0.2Ni0.4Mn0.4O2, as the cathode materia for lithium ion batteries, was modified by TiO2-coatingThe effect of TiO2-coating on the structure and electro-chemical performance of LiCo0.2Ni0.4Mn0.4O2 was char-acterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and galvanostatic charge-discharge tests. The results suggest that a small amount of TiO2-coating doesnot change the crystalline structure, but considerably improves the electrochemical performance of LiCo0.2Ni0.4Mn0.4O2 in terms of capacity delivery and cyclability. XPS measurements confirm that the improved electrochemical performance is most possibly attributed to a decrease in interaction between the layered material and non-aqueous electrolyte during the charge-discharge processes.
Key words
LiCo0.2Ni0.4Mn0.4O2, TiO2-coating, electro-chemical performance, lithium ion batteries引用本文复制引用
基金项目
Electronic Information Industry Development Foundation of Ministry of Information Industry of China(MIIC)
Electronic Information Industry Development Foundation of Ministry of Information Industry of China(2004-479)
出版年
2008
NETL
NSTL
万方数据