Magnesium borohydride: A new hydrogen storage material

T. Matsunaga, F. Buchter, K. Miwa, S. Towata, S. Orimo, A. Züttel

Research output: Contribution to journalArticlepeer-review

71 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)193-196
Number of pages4
JournalRenewable Energy
Volume33
Issue number2
DOIs
Publication statusPublished - 2008 Feb

Keywords

  • Hydrogen absorbing materials
  • Thermal analysis
  • Thermodynamic properties

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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