Journal
APPLIED PHYSICS LETTERS
Volume 92, Issue 20, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2931083
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We report on our results calculated from density functional theory and GW of the dehydrogenation properties in a cubic phase of AlH3. The metallic nature of the electronic structure entails a more favorable hydrogen removal energy which is lowered by 75% compared to the insulating hexagonal phase. This remarkable reduction in the Al-H bond strength bears important consequences for feasible applications of AlH3 as an on-board hydrogen storage material for mobile applications. We suggest that the cubic phase could be prepared and stabilized experimentally at ambient pressure by off-board quenching. (c) 2008 American Institute of Physics.
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