Electrochemistry and structural chemistry of Li[CrTi]O4 (Fd(3)over-barm) in nonaqueous lithium cells

被引:74
作者
Ohzuku, T [1 ]
Tatsumi, K [1 ]
Matoba, N [1 ]
Sawai, K [1 ]
机构
[1] Osaka City Univ, Fac Engn, Dept Appl Chem, Electrochem & Inorgan Chem Lab, Osaka 5588585, Japan
关键词
D O I
10.1149/1.1393944
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Li[CrTi]O-4 (Fd (3) over bar m; n = 8.32 Angstrom) having a spinel-framework structure was prepared and examined in nonaqueous lithium cells. Li/Li[CrTi]O-4 cells showed the flat operating voltages of 1.50 V and rechargeable capacity of 150 mAh/g. The X-ray diffraction examinations in this region indicated that Li[CrTi]O-4 was reduced to Li-2[CrTi]O-4 in a topotactic manner. Electrochemical oxidation of Li[CrTi]O-4 was also examined. Redox potential of 4.7 V vs. Li was observed while reversibility was pool due to the destruction of crystallite. Differences and similarities between Li[CrTi]O-4 and Li[Li0.33Ti1.67]O-4 were discussed with respect to operating voltage, reversibility, and insertion scheme. (C) 2000 The Electrochemical Society. S0013-4651(00)02-069-3. All rights reserved.
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收藏
页码:3592 / 3597
页数:6
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