Engineering the Mg-Mg2Ni eutectic transformation to produce improved hydrogen storage alloys

K. Nogita, S. Ockert, J. Pierce, M. C. Greaves, C. M. Gourlay, A. K. Dahle

研究成果: Contribution to journalArticle査読

48 被引用数 (Scopus)

抄録

The technique of trace element doping to modify the solidification mechanism of faceted/non-faceted eutectics has been applied to the Mg-Mg2Ni alloy system. It is demonstrated that the micro- and nano-structure of cast hypoeutectic Mg-Mg2Ni alloys can be varied by trace additions of Na, Ca or Eu to the liquid prior to solidification. As a result, the reversible hydrogen absorption capability was in excess of 90% of the theoretical value of 6.8 wt.% under the absorption parameters of 350 °C and 1 MPa for 24 min and subsequent desorption at 0.2 MPa for 24 min after activation. The hydrogen absorption kinetics have been dramatically improved under realistic industrial conditions, and show no sign of reduced capacity over 200 cycles. This processing route results in a non-pyrophoric material that may be produced in large quantities at comparatively low cost.

本文言語英語
ページ(範囲)7686-7691
ページ数6
ジャーナルInternational Journal of Hydrogen Energy
34
18
DOI
出版ステータス出版済み - 9 2009

All Science Journal Classification (ASJC) codes

  • 再生可能エネルギー、持続可能性、環境
  • 燃料技術
  • 凝縮系物理学
  • エネルギー工学および電力技術

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