Electrochemical and calorimetric approach to spinel lithium manganese oxide

被引:33
作者
Kobayashi, Y [1 ]
Kihira, N [1 ]
Takei, K [1 ]
Miyashiro, H [1 ]
Kumai, K [1 ]
Terada, N [1 ]
Ishikawa, R [1 ]
机构
[1] Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan
关键词
lithium ion cell; spinel lithium manganese oxide; calorimetry; capacity fading;
D O I
10.1016/S0378-7753(99)00203-7
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 simultaneous electrochemical and calorimetric measurement was conducted on a spinel lithium manganese oxide (LiMn2O4)-cathode, carbon-anode prismatic lithium ion cell. From the comparison of thermal behavior at room temperature (25 degrees C) and at an elevated temperature (40 degrees C), a pronounced exothermic thermal behavior was observed during charging in the high voltage region (0.2 < x < 0.5 in LixMn2O4) at elevated temperatures. The degraded cell that was operated at 40 degrees C indicated that the capacity fading occurred mainly in the same high voltage region in advance of lower region. The irreversible thermal behavior observed by calorimetry clearly indicates the degradation of LiMn2O4 at elevated temperatures. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:463 / 466
页数:4
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