Thermally-induced cation disorder in LiFePO(4)

Abstract

LiFePO(4) has a fully ordered olivine structure in samples prepared by solid state reaction below similar to 800 degrees C but, with increasing temperature, a small amount of Li and Fe site exchange occurs reaching a value of about 4% just below melting at 975 degrees C. The disorder is reversible on annealing at lower temperatures and is detected by changes in lattice parameters and in cation site occupancies obtained by Rietveld refinement of X-ray powder diffraction data. (C) 2011 Elsevier B.V. All rights reserved.

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Authors/Creators:	Biendicho, J.J. West, A.R.
Copyright, Publisher and Additional Information:	© 2011 Elsevier. This is an author produced version of a paper subsequently published in Solid State Ionics. Uploaded in accordance with the publisher's self-archiving policy.
Keywords:	LiFePO(4); Lithium cathode; X-ray diffraction; Cation disorder
Dates:	Published: 16 November 2011
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield)
Depositing User:	Miss Anthea Tucker
Date Deposited:	27 Jan 2012 14:53
Last Modified:	08 Feb 2013 17:36
Published Version:	http://dx.doi.org/10.1016/j.ssi.2011.08.006
Status:	Published
Publisher:	Elsevier
Refereed:	Yes
Identification Number:	https://doi.org/10.1016/j.ssi.2011.08.006

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Thermally-induced cation disorder in LiFePO(4)

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