Structure, morphology and electrochemical properties of LiNi0.5Mn0.5-xCOxO2 prepared by solid state reaction

被引：59
作者：
Li, DC
Sasaki, Y
Kageyama, M
Kobayakawa, K
Sato, Y
机构：
[1] Kanagawa Univ, Fac Engn, Dept Appl Chem, Kanagawa Ku, Yokohama, Kanagawa 2218686, Japan
[2] Kanagawa Univ, High Tech Res Ctr, Yokohama, Kanagawa 2218686, Japan
来源：
JOURNAL OF POWER SOURCES | 2005年 / 148卷 / 148期
关键词：
Li-ion battery; cathode material; LiNi0.5Mn0.5-xCoxO2; unequivalent substitution; electrochemical behavior;
D O I：
10.1016/j.jpowsour.2005.02.006
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：
A series of LiNi0.5Mn0.5-xCoxO2 (0 <= x <= 0.5) compounds was prepared by a solid state reaction, and their structural, morphological and electrochemical characteristics were also investigated. Co doping suppresses the formation of the impurity phase, NiO, and improves the crystallinity of the compounds. Moreover, the unequilavent substitution of cobalt for manganese would give rise to the increase in the average valence of nickel, thereby shrinkage in the lattice volume and improvement of the electrochemical properties. LiNi0.5Mn0.2Co0.3O2 shows a high reversible capacity as well as an excellent rate capability in 3-4.6 V. (c) 2005 Elsevier B.V. All rights reserved.
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页码：85 / 89
页数：5
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