Issue 6, 2002
From the journal:

Journal of Materials Chemistry

Hikari Shigemura,†ab   Mitsuharu Tabuchi,*a   Hironori Kobayashi,a   Hikari Sakaebe,a   Atsushi Hiranoc  and  Hiroyuki Kageyamaa  

* Corresponding authors

a Special Division of Green Life Technology, National Institute of Advanced Industrial Science and Technology (AIST), Osaka, Japan
E-mail: m-tabuchi@aist.go.jp

b New Energy and Industrial Technology Development Organization (NEDO), Tokyo, Japan

c Faculty of Engineering, Mie University, Mie, Japan

Abstract

Solid solutions, Li(Fe, Co)xMn2 − xO4 (0 ≤ x ≤ 0.5 for Fe, 0 ≤ x ≤ 1.0 for Co) were synthesized by solid state reaction at 1023–1073 K in O2 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 M16d–O32e distance calculated from the lattice parameters. Charge and discharge properties were studied in voltage range 3.0–5.3 V vs. Li/Li+.

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

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Article information

DOI
https://doi.org/10.1039/B200690C
Article type
Paper
Submitted
18 Jan 2002
Accepted
20 Mar 2002
First published
19 Apr 2002

J. Mater. Chem., 2002,12, 1882-1891

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

H. Shigemura, M. Tabuchi, H. Kobayashi, H. Sakaebe, A. Hirano and H. Kageyama, J. Mater. Chem., 2002, 12, 1882 DOI: 10.1039/B200690C

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