Dehydriding and rehydriding reactions of LiBH₄
- Orimo, S. Institute for Materials Research, Tohoku University, Sendai, Japan
- Nakamori, Y. Institute for Materials Research, Tohoku University, Sendai, Japan
- Kitahara, G. Institute for Materials Research, Tohoku University, Sendai, Japan
- Miwa, K. Toyota Central R&D Laboratories, Inc., Nagakute, Aichi, Japan
- Ohba, N. Toyota Central R&D Laboratories, Inc., Nagakute, Aichi, Japan
- Towata, S. Toyota Central R&D Laboratories, Inc., Nagakute, Aichi, Japan
- Züttel, Andreas Physics Institute, University of Fribourg, Switzerland
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06.07.2005
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.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 7886
- DOI 10.1016/j.jallcom.2004.10.091
- Persistent URL
- https://folia.unifr.ch/unifr/documents/300200
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