Synthesis and electrochemical properties of lithium chromium titanium oxide with ramsdellite structure

被引：15
|
作者：
Kajiyama, A [1 ]
Takada, K
Arihara, K
Inada, T
Sasaki, H
Kondo, S
Watanabe, M
机构：
[1] Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan
[2] Tokyo Univ Sci, Fac Sci & Technol, Chiba 2788510, Japan
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2003年 / 150卷 / 02期
关键词：
D O I：
10.1149/1.1530152
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A pseudoternary system Li2O-Cr2O3-TiO2 was investigated in the temperature range from 800 to 1100degreesC. A new compound with ramsdellite structure was discovered. The ramsdellite-type phase was obtained alone at temperatures above 1000degreesC in the composition range xless than or equal to1.5 of Li8/7(2-x/3)Cr8x/7Ti8/7(3-2x/3)O8. The ramsdellite structure showed reversible extraction and insertion cycles of lithium at the potential of ca. 4.0 V vs. Li/Li+ as well as 1.5 V. The former potential was attributed to a redox couple of Cr3+/Cr4+ and the latter to Ti3+/Ti4+. The crystal structure was maintained against the electrochemical extraction and insertion of lithium, and the cell volume was almost unchanged in the processes. (C) (2)002 The Electrochemical Society.
引用
收藏
页码：A157 / A160
页数：4
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