Magnesium borohydride: A new hydrogen storage material
- Matsunaga, Tomoya Physics Department, University of Fribourg, Switzerland
- Buchter, Florian Physics Department, University of Fribourg, Switzerland
- Miwa, K. Toyota Central R+D Labs., Inc., Nagakute, Aichi, Japan
- Towata, S. Toyota Central R+D Labs., Inc., Nagakute, Aichi, Japan
- Orimo, S. Institute for Materials Research, Tohoku University, Sendai, Japan
- Züttel, Andreas Physics Department, University of Fribourg, Switzerland
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20.06.2007
Published in:
- Renewable Energy. - 2008, vol. 33, no. 2, p. 193-196
English
Magnesium borohydride (Mg(BH₄)₂) is a promising material for hydrogen storage because of its high gravimetric storage density (15.0 mass%). We intended to synthesize Mg(BH₄)₂ by decomposition reaction of LiBH₄ with MgCl₂ by heat treatment without using a solvent, where the product consists of LiCl and a compound of magnesium, boron and hydrogen. Hydrogen desorption temperature of the product is approximately 100 K lower than that of LiBH₄ and the decomposition consists of a two-step reaction. The products of the 1st and 2nd decomposition reactions are MgH₂ and Mg, respectively. This result indicates the following two-step reaction (1st reaction: Mg(BH₄)₂→MgH₂+2B+3H₂, 2nd reaction: MgH₂→Mg+H₂). The first decomposition peak is dominant and is around 563 K. The 2nd decomposition occurs at the temperature greater than 590 K.
- 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 9073
- DOI 10.1016/j.renene.2007.05.004
- Persistent URL
- https://folia.unifr.ch/unifr/documents/300717
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