The relationships between phases and structures of lithium manganese spinels

被引：49

作者：

Kanno, R ^{[1
]}

Kondo, A

Yonemura, M

Gover, R

Kawamoto, Y

Tabuchi, M

Kamiyama, T

Izumi, F

Masquelier, C

Rousse, G

机构：

[1] Kobe Univ, Dept Chem, Fac Sci, Kobe, Hyogo 657, Japan

[2] Osaka Natl Res Inst, Ikeda, Osaka 653, Japan

[3] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 305, Japan

[4] Natl Inst Res Inorgan Mat, Tsukuba, Ibaraki 305, Japan

[5] Univ Paris 11, Orsay Lab Chim Solides, Paris, France

来源：

JOURNAL OF POWER SOURCES | 1999年 / 81卷

关键词：

spinel; cubic; tetragonal;

D O I：

10.1016/S0378-7753(99)00103-2

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：

Structures of the cubic lithium manganese spinels synthesized at 900 degrees C; and the tetragonal spinel synthesized by quenching from 920 degrees C into liquid N-2 were determined by rime-of-flight (TOF) neutron powder diffraction. The ionic distribution was determined for the tetragonal spinel to be [Li-1](tetra)(Mn-2)(octa)O-3.86(3). A small amount of oxygen vacancy was observed at the oxygen site. On the other hand, the structure of the cubic spinel determined at 325 K showed oxygen vacancy at 32e site with interstitial oxygen at 8b sites. The occupation parameters at the interstitial 8b site decreased with decreasing synthesis temperature from 900 degrees to 750 degrees C. On the basis of these findings a new oxygen vacancy cluster model is proposed. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：542 / 546

页数：5

共 13 条

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