Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 147, Issue 10, Pages 3592-3597Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.1393944
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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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