Abstract
To improve the hydrogen storage performance, Mg3La alloy and TiCl3 is ball milled simultaneously with LiBH4 to yield a designed composition. It has been revealed that there is a synergistic effect of Mg3La alloy and TiCl3 on the dehydrogenation of LiBH4, which improves the dehydrogenation performance when compared to adding either hydrogenated Mg3La or TiCl3 alone. 4.3 wt% of H2 can be released within 10 min at 400 °C in the LiBH4 + Mg3La + TiCl3 system. The dehydrogenation activation energy of this system is 52.6 kJ mol−1, which is much lower than that of pristine LiBH4. In addition, the LiBH4 + Mg3La + TiCl3 system preserves fast dehydrogenation kinetics and stable hydrogen storage capacity in the re-/dehydrogenation cycles.
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