Cycle stability improvement of La-Mg-Ni based alloys via composite method

Kean Long Lim, Yongning Liu, Qing An Zhang, Kuen Song Lin, Sammy Lap Ip Chan

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

La-Mg-Ni based alloys have a high hydrogen storage capacity, but their cycle stability is usually poor. In this work, a series of composites were synthesized by mixing La-Mg-Ni based alloys with a commercial AB5 type alloy. The aim was to investigate the effects of AB5 additions and ball milling treatment in improving the cycle stability of La-Mg-Ni based alloys, while maintaining a substantial and reversible hydrogen storage capability. It was found that the cycle stability was greatly influenced by the amount of AB5 added, but the effect of ball milling pre-treatment was small. While the increase in AB5 content was beneficial, the cost of the composite also went up accordingly. In light of these challenges, a feasibility study was conducted to optimize the compositions. The results suggested that the composite with a 50 wt% of AB5 addition was the optimum compositions in maximizing the hydrogen storage capacity and cycle stability, while minimizing the cost up to 20% as compared with AB5 alone.

Original languageEnglish
Pages (from-to)274-281
Number of pages8
JournalJournal of Alloys and Compounds
Volume661
DOIs
Publication statusPublished - 15 Mar 2016

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Hydrogen storage
Composite materials
Ball milling
Chemical analysis
Costs

Keywords

  • Gas-solid reaction
  • Intermetallic
  • Metal hydride
  • Thermodynamic property

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

Cite this

Cycle stability improvement of La-Mg-Ni based alloys via composite method. / Lim, Kean Long; Liu, Yongning; Zhang, Qing An; Lin, Kuen Song; Chan, Sammy Lap Ip.

In: Journal of Alloys and Compounds, Vol. 661, 15.03.2016, p. 274-281.

Research output: Contribution to journalArticle

Lim, Kean Long ; Liu, Yongning ; Zhang, Qing An ; Lin, Kuen Song ; Chan, Sammy Lap Ip. / Cycle stability improvement of La-Mg-Ni based alloys via composite method. In: Journal of Alloys and Compounds. 2016 ; Vol. 661. pp. 274-281.
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