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