Enhancement of the electrochemical properties of Li1Mn2O4 through chemical substitution

被引：98
作者：
Amatucci, GG
Pereira, N
Zheng, T
Plitz, I
Tarascon, JM
机构：
[1] BELLCORE, Energy Storage Res Grp, Red Bank, NJ 07701 USA
[2] Rutgers State Univ, Piscataway, NJ 08855 USA
[3] Univ Picardie, F-80000 Amiens, France
来源：
JOURNAL OF POWER SOURCES | 1999年 / 81卷
关键词：
Li1Mn2O4; Jahn-Teller distortion; chemical substitution;
D O I：
10.1016/S0378-7753(99)00186-X
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 Link between room temperature (RT) cycling failure for Li1Mn2O4-type spinels and elevated temperature (ET) failure of Li1.05Mn1.95O4 materials was investigated by physical and electrochemical characterization. Failure for both ET and RT cycling occurred at the end of discharge. Substantial evidence suggesting a link based on the cooperative Jahn-Teller distortion was found. Based on this knowledge, LiAlxMn2-xO4-deltaFz materials were fabricated. These novel compounds were found to offer much improved capacity and ET performance than present generation materials. Three hundred cycles at 55 degrees C resulted in 15% capacity loss. Storage in charged and discharged state for 4 days at 70 degrees C revealed less than 1.6% irreversible capacity Boss. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：39 / 43
页数：5
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