Comparative study on the reversibility of pure metal borohydrides

Hai Wen Li, Etsuo Akiba, Shin Ichi Orimo

研究成果: ジャーナルへの寄稿学術誌査読

22 被引用数 (Scopus)


Improvement of the reversibility of metal borohydrides is a key issue for hydrogen storage applications. In this study, we carefully investigated the first rehydrogenation of pure Mg(BH4)2 and Ca(BH 4)2 under a hydrogen pressure of 40.0 MPa. Mg(BH 4)2 is produced even at a relatively low temperature of 473 K, and its amount increases with the temperature up to 673 K, leading to the increased rehydrogenation content and a maximum (7.6 mass%, equivalent to 51% of Mg(BH4)2) at 673 K. Under the same condition, more than 90% of rehydrogenation is confirmed through the formation of α-Ca(BH 4)2 as clearly observed by XRD and NMR measurements. Comparison of the rehydrogenation properties of Mg(BH4)2 and Ca(BH4)2 suggests that control of dehydrogenation products would be an important approach to improve the reversibility of metal borohydrides.

ジャーナルJournal of Alloys and Compounds
出版ステータス出版済み - 2013

!!!All Science Journal Classification (ASJC) codes

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学


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