Structural and electrochemical properties of Li(Fe, Co)xMn2-xO4 solid solution as 5 V positive electrode materials for Li secondary batteries

被引：42

作者：

Shigemura, H

Tabuchi, M ^{[1
]}

Kobayashi, H

Sakaebe, H

Hirano, A

Kageyama, H

机构：

[1] Natl Inst Adv Ind Sci & Technol, Special Div Green Life Technol, Osaka 5638577, Japan

[2] New Energy & Ind Technol Dev Org, Tokyo 1700013, Japan

[3] Mie Univ, Fac Engn, Tsu, Mie 5148507, Japan

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2002年 / 12卷 / 06期

关键词：

D O I：

10.1039/b200690c

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：

Solid solutions, Li( Fe, Co)(x)Mn2-xO4 (0 less than or equal to x less than or equal to 0.5 for Fe, 0 less than or equal to x < 1.0 for Co) were synthesized by solid state reaction at 1023-1073 K in O-2 atmosphere. The compositional dependence of lattice parameters and cation distribution was studied by neutron diffraction Rietveld refinement. It was revealed that Fe and Co partially occupied tetrahedral 8a sites and the 1 : 3 and 1 : 1 ordering did not occur on Fe (Co) and Mn ions in octahedral 16d sites. X-Ray absorption fine structure (XAFS) analysis showed the variation of valences and metal-oxygen interatomic distances of Mn, Fe, and Co. The Fe-O distance was longer whereas the Co-O distance was shorter compared to the averaged M-16d-O-32e distance calculated from the lattice parameters. Charge and discharge properties were studied in voltage range 3.0-5.3 V vs. Li/Li+.

引用

页码：1882 / 1891

页数：10

共 29 条

[1] Cobalt substitution in lithium manganate spinels:: examination of local structure and lithium extraction by XAFS [J].