Issue 41, 2005
From the journal:

Journal of Materials Chemistry

Oxygen content and electrochemical activity of LiCoMnO4−δ

D. Pasero,*a   S. de Souza,a   N. Reevesa  and  A. R. Westa  

* Corresponding authors

a Department of Engineering Materials, The University of Sheffield, Mappin Street, Sheffield, S1 3JD, UK

Abstract

LiCoMnO4−δ is one of the materials first reported as a 5 V cathode in prototype lithium batteries, but as-prepared material has a residual 4 V plateau in addition to the main 5 V plateau. A combination of thermogravimetry on samples prepared under various conditions, high temperature X-ray powder diffraction and electrochemical testing, shows the 4 V plateau to depend on the extent of oxygen deficiency, δ, and to, therefore, correlate with the Mn3+ content. A complex reaction sequence occurs upon oxygen loss, including formation of oxygen-deficient spinel, precipitation of Li2MnO3 and change in cation composition of the spinel but remarkably, these reactions show a high degree of reversibility upon oxygen uptake.

Graphical abstract: Oxygen content and electrochemical activity of LiCoMnO4−δ

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Article information

DOI
https://doi.org/10.1039/B508521G
Article type
Paper
Submitted
16 Jun 2005
Accepted
02 Aug 2005
First published
26 Aug 2005

J. Mater. Chem., 2005,15, 4435-4440

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Oxygen content and electrochemical activity of LiCoMnO4−δ

D. Pasero, S. de Souza, N. Reeves and A. R. West, J. Mater. Chem., 2005, 15, 4435 DOI: 10.1039/B508521G

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