Changes in local structure during electrochemical Li insertion into A-site deficient perovskite oxides, La1/3NbO3

被引：22

作者：

Nakayama, M

Ikuta, H

Uchimoto, Y

Wakihara, M ^{[1
]}

Terada, Y

Miyanaga, T

Watanabe, I

机构：

[1] Tokyo Inst Technol, Dept Appl Chem, Meguro Ku, Tokyo 1528552, Japan

[2] Japan Synchrotron Radiat Res Inst, Hyogo 6795198, Japan

[3] Hirosaki Univ, Fac Sci & Technol, Dept Mat Sci & Technol, Hirosaki, Aomori 0368561, Japan

[4] Osaka Womens Univ, Fac Sci, Sakai, Osaka 5900035, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2003年 / 107卷 / 39期

关键词：

D O I：

10.1021/jp034262+

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A detailed investigation of the local structural changes with lithiated perovskite oxides, LixLa1/3NbO3, has been carried out using extended X-ray absorption fine structure (EXAFS) measurements. From Nb K-edge EXAFS measurement, the interatomic distance of first shell Nb-O interaction increased with the composition x by electrochemical Li-x insertion. This behavior ascribed to the expansion of Nb ion due to the reduction of Nb5+ to Nb4+. On the other hand, La K-edge EXAFS measurement showed that the interatomic distance of the first shell La-O interaction decreased with the lithiation reaction. Furthermore, those of second shell Nb-La and third shell Nb-Nb and La-La bonds tended to be unchanged with reaction. Such a complicated behavior in the change of each interatomic distance with lithium insertion can be understood by the model of tilting of NbO6 octahedra in the perovskite structure.

引用

页码：10715 / 10721

页数：7

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