Hydrogen storage in binary and ternary Mg-based alloys : A comprehensive experimental study

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DOIResolve DOI: http://doi.org/10.1016/j.ijhydene.2009.12.013
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TypeArticle
Journal titleInternational Journal of Hydrogen Energy
Volume35
Issue5
Pages20912103; # of pages: 13
SubjectHydrogen storage; Mg-based alloys; Intermetallics; Kinetics
AbstractThis study focused on hydrogen sorption properties of 1.5 um thick Mg-based films with Al, Fe and Ti as alloying elements. The binary alloys are used to establish as baseline case for the ternary Mg–Al–Ti, Mg–Fe–Ti and Mg–Al–Fe compositions. We show that the ternary alloys in particular display remarkable sorption behavior: at 200 _C the films are capable of absorbing 4–6 wt% hydrogen in seconds, and desorbing in minutes. Furthermore, this sorption behavior is stable over cycling for the Mg–Al–Ti and Mg–Fe–Ti alloys. Even after 100 absorption/desorption cycles, no degradation in capacity or kinetics is observed. For Mg–Al–Fe, the properties are clearly worse compared to the other ternary combinations. These differences are explained by considering the properties of all the different phases present during cycling in terms of their hydrogen affinity and catalytic activity. Based on these considerations, some general design principles for Mg-based hydrogen storage alloys are suggested.
Publication date
LanguageEnglish
AffiliationNRC Canadian Neutron Beam Centre; National Research Council Canada; National Institute for Nanotechnology
Peer reviewedYes
NPARC number16869215
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Record identifier04d265b6-d365-4353-9dd2-3575de57faa7
Record created2011-02-15
Record modified2016-05-09
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