Magnesium borohydride: A new hydrogen storage material

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

Renewable Energy, 2008, vol. 33, issue 2, 193-196

Abstract: Magnesium borohydride (Mg(BH4)2) is a promising material for hydrogen storage because of its high gravimetric storage density (15.0mass%). 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 100K 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 563K. The 2nd decomposition occurs at the temperature greater than 590K.

Keywords: Hydrogen absorbing materials; Thermodynamic properties; Thermal analysis (search for similar items in EconPapers)
Date: 2008
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Citations: View citations in EconPapers (10)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:33:y:2008:i:2:p:193-196

DOI: 10.1016/j.renene.2007.05.004

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