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An in situ neutron time-of-flight diffraction study of LaMM(NoCoAlMn)5-x battery electrode materials and their deuterides, for x = 0 and x = 0.2

Georgiev, PA, Liu, J, Ross, DK, Andersen, KH and Otto, A 2003, 'An in situ neutron time-of-flight diffraction study of LaMM(NoCoAlMn)5-x battery electrode materials and their deuterides, for x = 0 and x = 0.2' , Journal of Alloys and Compounds, 349 (1-2) , pp. 325-333.

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Abstract

The structural properties of two mechanically activated commercial LaNi5 type battery materials and their deuterides have been investigated by means of in situ neutron powder diffraction analysis. A discussion of the hysteresis between the absorption and desorption isotherms is given. Using standard Rietveld refinement procedures, information on the variation of the deuterium site occupancy, the lattice symmetry and the cell volume are also presented. In particular, we report on the variation of line-broadening with concentration as well as on the complex time-dependent changes in the lattice parameters and the line-broadening following a step change in the deuterium pressure. We then show that these relatively novel data provide valuable information on the rather different phase transition processes observed for the two materials and offer an explanation for the superior kinetics of the AB4.8 alloy.

Item Type: Article
Uncontrolled Keywords: Hydrogen absorbing materials; Metal hydrides; Rare earth compounds; Neutron diffraction
Themes: Subjects / Themes > Q Science > QD Chemistry
Subjects / Themes > Q Science > QC Physics
Subjects outside of the University Themes
Schools: Schools > School of Computing, Science and Engineering
Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre (SIRC)
Journal or Publication Title: Journal of Alloys and Compounds
Publisher: Elsevier
Refereed: Yes
ISSN: 09258388
Depositing User: H Kenna
Date Deposited: 23 Aug 2007 10:13
Last Modified: 01 Dec 2015 00:03
URI: http://usir.salford.ac.uk/id/eprint/326

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