Li2+xMn0.91Cr1.09O4 cathode materials for Li-ion cells

被引：0
|
作者：
Cho, J [1 ]
Park, B
机构：
[1] Samsung SDI Co Ltd, Chonan, Chungchongnam D, South Korea
[2] Seoul Natl Univ, Sch Mat Sci & Engn, Seoul, South Korea
来源：
ELECTROCHEMICAL AND SOLID STATE LETTERS | 2000年 / 3卷 / 08期
关键词：
D O I：
10.1149/1.1391147
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A new series of cathode materials Li2+xMn0.91Cr1.09O4 (x = 0.7, 0.9, 1.1, and 1.3) was prepared from the reaction of Mn0.91Cr1.09O4 and LiOH . H2O by heat-treatment at 700 degrees C for 3, 6, and 12 h. The length of the heat-treatment significantly influenced the capacity, with longer heat-treatment times resulting in smaller capacities. Li3.1Mn0.91Cr1.09O4 phases heat-treated for 3 h showed the highest discharge capacity of 220 mAh/g at the 0.1 C rate (18 mA/g) cycled between 4.5 and 2 V. Tests of Li2+xMn0.91Cr1.09O4 in Li-ion cells (C/Li3.1Mn0.91Cr1.09O4) showed an initial capacity of 220 mAh/g at the 0.1 C rate, and relatively good rate capability from the 0.2 C to the 2 C rate between 4.5 and 2 V. (C) 2000 The Electrochemical Society. S1099-0062(00)03-021-2. All rights reserved.
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页码：355 / 358
页数：4
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