Journal article

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
Department
Physique
Language
  • English
Classification
Physics
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License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/300717
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