Investigations on hydrogen storage properties of Mg2Ni+x wt% LaMg2Ni (x=0, 10, 20, 30) composites

► Tittle La is introduced into Mg2Ni alloy without multiphase created. ► La is introduced into Mg2Ni by hydrogen decomposed ball-milling. ► Reversible hydrogen storage properties at low temperature are improved. ► Hydrogen storage capacity of composites is beyond 3 wt% at 473 K.