“…The hydrogen storage capacity of the hydride of Mg 2 Ni, Mg 2 NiH 4 , is about 3.6 wt%, which is better than that of other types of non-Mg-based metal hydrides [2,3]. Mg 2 Ni and its modified alloys have been getting more attention to be used as an on-board hydrogen storage medium or negative electrode in Ni-MH batteries [1,2,[7][8][9]. Previous efforts to decrease the desorption temperature and enhance the kinetics and cyclic life for Mg 2 Ni-type alloys have been systematically summarized and discussed in two recent reviews [1,2].…”