Neutron powder diffraction studies of LiMn2-yAlyO4 synthesized by the emission drying method

被引：51

作者：

Komaba, S

Oikawa, K

Myung, ST

Kumagai, N

Kamiyama, T

机构：

[1] Iwate Univ, Dept Chem Engn, Morioka, Iwate 0208551, Japan

[2] High Energy Accelerator Res Org, Inst Mat Struct Sci, Neutron Sci Lab, Tsukuba, Ibaraki 3050801, Japan

来源：

SOLID STATE IONICS | 2002年 / 149卷 / 1-2期

关键词：

lithium-ion battery; neutron diffraction; Rietveld refinement; spinel structure; LiMn2O4;

D O I：

10.1016/S0167-2738(02)00168-6

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：

The aluminum-doped spinel-type lithium manganese oxides, LiMn2 - yAlyO4, have been successfully synthesized through the emulsion drying method, and their crystal structures were studied by neutron powder diffraction. Rietveld refinements of their neutron diffraction data revealed that Al was substituted selectively for Mn at the 16d site and that Li occupied only the 8a site. Thus, the Al-doped compound can be expressed as [Li](8a)[Mn2 - yAly](16d)[O-4](32e), (y=0-0.452). The lattice constant a decreased linearly with increasing the occupation factor g(Al). The length of (Mn, Al)-O bonds in (Mn, Al)O-6 octahedra changed in a manner expected from average ionic radii for Mn1 - g(Al)Al-g(A1) .(C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：47 / 52

页数：6

共 33 条

[1] The elevated temperature performance of the LiMn2O4/C system:: failure and solutions [J].