Effects of B-site ion (M) substitution on the ionic conductivity of (Li3xLa2/3-x)(1+y/2(MyTi1-y)O3 (M = Al, Cr)

被引：22

作者：

He, LX ^{[1
]}

Yoo, HI ^{[1
]}

机构：

[1] Seoul Natl Univ, Sch Mat Sci & Engn, Solid State Ion Res Lab, Seoul 151742, South Korea

来源：

ELECTROCHIMICA ACTA | 2003年 / 48卷 / 10期

关键词：

Li3xLa2/3-xTiO3; ionic conductivity; Li-ion conductors; perovskite; ion substitution;

D O I：

10.1016/S0013-4686(02)00848-4

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Effect on the ionic conductivity of B-site ion (M) substitution in (Li3xLa2/3-x)(1+y/2)MyTi1-O-y(3) (M=Al, Cr) has been investigated. It has been found that partial substitution of smaller Al3+ for Ti4+ is effective to enhance the ionic conductivity of Li3xLa2/3-xTiO3. At 300 K, the maximum bulk conductivity of (1.58+/-0.01) x 10(-3) S cm(-1) is observed from the composition of (Li0.39La0.54)(1-y/2)AlyTi1-yO3 with y = 0.02 (x = 0.13), that is the highest yet reported for known perovskite solutions at room temperature. The conductivity enhancement is interpreted as being due to the substitution-induced bond-strength change rather than due to bottleneck size change for Li migration, TiO6-octahedron tilting or A-site cation ordering. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：1357 / 1366

页数：10

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