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- W2082091732 abstract "First-principles calculation and x-ray diffraction simulation methods have been used to explore crystal structures and reaction mechanisms of the intermediate phases involved in dehydriding of LiBH4. LiBH4 was found to dehydride via two sequential steps: first dehydriding through LiBH, followed by the dehydriding of LiBH through LiB. The first step, which releases 13.1wt.% hydrogen, was calculated to have an activation barrier of 2.33eV per formula unit and was endothermic by 1.28eV per formula unit, while the second step was endothermic by 0.23eV per formula unit. On the other hand, if LiBH4 and LiBH each donated one electron, possibly to the catalyst doped on their surfaces, it was found that the barrier for the first step was reduced to 1.50eV. This implies that the development of the catalyst to induce charge migration from the bulk to the surface is essential to make LiBH4 usable as a hydrogen storage material in a moderate temperature range, which is also important to stabilize the low-temperature structure of Pnma (no. 62) LiBH on dehydrogenation. Consequently, the high 13.1wt.% hydrogen available from the dehydriding of LiBH4 and LiBH and their phase stability on Pnma when specific catalysts were used suggest that LiBH4 has good potential to be developed as the hydrogen storage medium capable of releasing the Department of Energy target of 6.5wt.% for a hydrogen fuel cell car in a moderate temperature range." @default.
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- W2082091732 date "2005-09-06" @default.
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- W2082091732 title "A candidate LiBH4 for hydrogen storage: Crystal structures and reaction mechanisms of intermediate phases" @default.
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- W2082091732 doi "https://doi.org/10.1063/1.2042632" @default.
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