LiNi0.74Co0.26-xMgxO2 cathode material for a Li-ion cell

被引：121

作者：

Cho, J ^{[1
]}

机构：

[1] Samsung SDI Co Ltd, Chonan City, Chungchongnam D, South Korea

来源：

CHEMISTRY OF MATERIALS | 2000年 / 12卷 / 10期

关键词：

D O I：

10.1021/cm000153l

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 effects of a partial substitution of Co with Mg in LiNi0.74Co0.26-xMgxO2 material on its X-ray structure, electrochemical properties, and thermal stability in the charged (delithiated) state have been studied. Results showed that the lattice parameters a and c as well as the cia ratio increased as the x-value increased. The DSC exothermic peak of the charged electrode LiNi0.74Co0.26-xMgxO2 (when x = 0.04 or higher) was significantly smaller than that of LiNi0.74Co0.26O2, indicating that the Mg substitution improved its thermal stability. The improvements of both the electrochemical and thermal stability are possibly due to the reduced cation mixing and improvement of layer structure by the expansion of the c-axis.

引用

页码：3089 / 3094

页数：6

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