Journal
CHEMPHYSCHEM
Volume 9, Issue 15, Pages 2157-2162Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.200800498
Keywords
hydrides; hydrogen storage; hydrogenation/dehydrogenation; ionic mobility; kinetics
Funding
- DOE through EERE [DE-AI-01-05EE11104]
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Metal hydrides are an important family of materials that can potentially be used for safe, efficient and reversible on-board hydrogen storage. Light-weight metal hydrides in particular have attracted intense interest due to their high hydrogen density. However, most of these hydrides have rather slow absorption kinetics, relatively high thermal stability, and/or problems with the reversibility of hydrogen absorption/desorption cycling. This paper discusses a number of different approaches for the improvement of the hydrogen storage properties of these materials, with emphasis on recent research on tuning the ionic mobility in mixed hydrides. This concept opens a promising pathway to accelerate hydrogenation kinetics, reduce the activation energy for hydrogen release, and minimize deleterious possible by-products often associated with complex hydride systems.
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