Antifluorite compounds, Li5+xFe1-xCoxO4, as a lithium intercalation host

被引：28

作者：

Imanishi, N ^{[1
]}

Inoue, Y ^{[1
]}

Hirano, A ^{[1
]}

Ueda, A ^{[1
]}

Takeda, Y ^{[1
]}

Sakaebe, H ^{[1
]}

Tabuchi, M ^{[1
]}

机构：

[1] Mie Univ, Fac Engn, Dept Chem, Tsu, Mie 5148507, Japan

来源：

JOURNAL OF POWER SOURCES | 2005年 / 146卷 / 1-2期

关键词：

Li5+xFe1-xCoxO4; antifluorite; lithium secondary battery;

D O I：

10.1016/j.jpowsour.2005.03.010

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：

Antifluorite-type materials, Li-5,Fe1-xCOxO4, were prepared and studied as a cathode for use in a lithium secondary battery. During the first charge process, the structure undergoes a phase change as the removal of lithium progresses. The original antifluorite structure is almost completely lost when 1.5 equivalents of lithium are deintercalated from the structure, as in the case of Li5FeO4. This tendency was less obvious in cobalt-doped samples, and 2.1 equivalents of lithium could be removed before the original lattice disappeared. Cobalt doping helps to maintain the original lattice configuration and enhances cycling stability. The Mossbauer spectra suggest that the electrons of oxygen atoms play a role in addition to those of iron. A 1.3 equivalents of lithium could be reversibly deintercalated from Li5.6Fe0.4CO0.6O4, which corresponds to 220 mAh g(-1). (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：21 / 26

页数：6

共 9 条

[1] Effect of iron on the electrochemical behaviour of lithium nickelate:: from LiNiO2 to 2D-LiFeO2 [J].