摘要： 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. [Display omitted] •We mixed La–Ni AB5 and La–Mg–Ni alloys to improve cycle life and reduce cost.•A 50%:50% mix gave the best performance in terms of cycle stability and cost saving.•Cycle stability is influenced by the constitution of the composites.•The effect of ball milling pre-treatment on cycle stability appears to be small.•Cycle life improvement was likely attributed by load sharing between both alloys. 出版者： Elsevier B.V 出版日期： 2016-03-15 出處： Journal of alloys and compounds, 2016-03, Vol.661, p.274-281 版權： 2015 Elsevier B.V. 識別號： ISSN: 0925-8388 識別號： EISSN: 1873-4669 識別號： DOI: 10.1016/j.jallcom.2015.11.215
