Dehydriding and rehydriding reactions of LiBH₄
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Orimo, S.
Institute for Materials Research, Tohoku University, Sendai, Japan
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Nakamori, Y.
Institute for Materials Research, Tohoku University, Sendai, Japan
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Kitahara, G.
Institute for Materials Research, Tohoku University, Sendai, Japan
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Miwa, K.
Toyota Central R&D Laboratories, Inc., Nagakute, Aichi, Japan
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Ohba, N.
Toyota Central R&D Laboratories, Inc., Nagakute, Aichi, Japan
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Towata, S.
Toyota Central R&D Laboratories, Inc., Nagakute, Aichi, Japan
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Züttel, Andreas
Physics Institute, University of Fribourg, Switzerland
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Published in:
- Journal of Alloys and Compounds. - 2005, vol. 404-406, p. 427-430
English
Structural differences in LiBH₄ before and after the melting reaction at approximately 550 K were investigated to clarify the experimental method for the confirmation of reversible dehydriding and rehydriding reactions. Since the long-range order of LiBH₄ begins to disappear after the melting reaction was achieved, investigation of the atomistic vibrations of the [BH₄]-anion in LiBH₄ was found to be effective for the confirmation of the reversibility. In the present study, LiBH₄ was successively dehydrided (decomposed) into LiH and B under 1 MPa of hydrogen at 873 K, and then rehydrided (recombined) into LiBH₄ under 35 MPa of hydrogen at the same temperature (873 K). The temperatures at the beginning and ending of the dehydriding reaction are lowered, by approximately 30 K, for LiBH₄ substituted (or mixed) with Mg (atomic ratio of Li:Mg=9:1) as compared to those for LiBH₄ alone. This is similar to the tendency exhibited by LiNH₂.
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Faculty
- Faculté des sciences et de médecine
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Department
- Département de Physique
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Language
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Classification
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Physics
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License
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License undefined
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Identifiers
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Persistent URL
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https://folia.unifr.ch/unifr/documents/300200
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