Effect of TiO2-coating on the structure and electrochemical performance of LiCo0.2Ni0.4Mn0.4O2

被引：0
|
作者：
Yang Xiao [1 ]
Huang You-Yuan [1 ]
Zhou Heng-Hui [1 ]
Chen Ji-Tao [1 ]
Zhang Xin-Xiang [1 ]
机构：
[1] Peking Univ, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
来源：
CHINESE JOURNAL OF INORGANIC CHEMISTRY | 2007年 / 23卷 / 05期
关键词：
LiCo0.2Ni0.4Mn0.4O2; TiO2-coating; electrochemical performance; lithium ion batteries;
D O I：
暂无
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
LiCo0.2Ni0.4Mn0.4O2 cathode material for lithium ion batteries was modified by TiO2-coating. The effect of TiO2-coating on the structure and electrochemical performance of LiCo0.2Ni0.4Mn0.4O2 was characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and galvanostatic charge-discharge tests.. The results suggest that a small amount TiO2-coating does not change the crystalline structure but considerably improves the electrochemical performance of LiCo0.2Ni0.4Mn0.4O2 in terms of capacity delivery and cyclability. XPS results confirm that the improved electrochemical performance is most possibly attributed to the decrease of the interaction between layered material and nonaqueous electrolyte during the charge-discharge processes.
引用
收藏
页码：753 / 758
页数：6
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