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 journalArticlepeer-review

20 Scopus citations


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
StatePublished - 15 Mar 2016


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


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