Gas Emission Properties of the MgHx-Zn(BH4)2 Systems

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  • Nakagawa T.
    Department of Quantum Matter, ADSM, Hiroshima University
  • Ichikawa T.
    Institute for Advanced Materials Research, Hiroshima University
  • Kojima Y.
    Institute for Advanced Materials Research, Hiroshima University
  • Fujii H.
    Institute for Advanced Materials Research, Hiroshima University

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タイトル別名
  • Gas Emission Properties of the MgH<I><SUB>x</SUB></I>-Zn(BH<SUB>4</SUB>)<SUB>2</SUB> Systems

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The gas emission properties of MgH2-Zn(BH4)2 and Mg-Zn(BH4)2 systems have been investigated to design a new Metal-B-H system which has superior hydrogen storage properties. Thermal decomposition properties of two-layered samples with MgH2 on Zn(BH4)2, Mg on Zn(BH4)2, the mixture of Mg and Zn(BH4)2 and the mixture of MgH2 and Zn(BH4)2 were investigated by DTA-MS. The experimental results indicated that the B2H6 emission decreases in the case of the two-layered samples and the mixtures when compared with that of Zn(BH4)2, as a result of reaction of the solid MgH2 or Mg with B2H6. Then, the reactions between Mg and Zn(BH4)2 as well as MgH2 and Zn(BH4)2 were exothermic. In the case of the Mg-Zn(BH4)2 mixture, the reaction between Mg and Zn(BH4)2 surprisingly proceeded below 100°C before the decomposition of Zn(BH4)2 occurred. This indicates that the reaction between Mg and Zn(BH4)2 proceeds by a solid-solid reaction.

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