Preparation of particulate Li4Ti5O12 having excellent characteristics as an electrode active material for power storage cells

被引:227
作者
Nakahara, K [1 ]
Nakajima, R [1 ]
Matsushima, T [1 ]
Majima, H [1 ]
机构
[1] Titan Kogyo KK, Ube, Yamaguchi 7558567, Japan
关键词
lithium secondary batteries; Li4Ti5O12; cycle characteristics; high rate characteristics; fine particle;
D O I
10.1016/S0378-7753(03)00169-1
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
In recent years, lithium secondary batteries have been widely utilized as a power source for mobile electronics, but modifications are required to apply this type of battery to motor vehicles or energy storage purposes. Although the excellent cycle characteristics of lithium titanate have been verified for small cells, the high rate characteristics of this material should be improved if it is used as an active material in large batteries. The authors prepared very fine particulates of lithium titanate having an average size of 0.7 mum. The prepared lithium titanate shows superior high rate characteristics, as well as excellent cycle characteristics. A high capacity maintenance ratio of 99% was achieved at 1 C and 25 degreesC after the 100th cycle. Taking the discharge capacity at 0.15 C, that at 10 C was 86% at 25 degreesC, while that at 50 degreesC was 96%. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:131 / 136
页数:6
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