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

页码：A157 / A160

页数：4

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