On the development of composite hydrogen storage materials prepared through mechanical alloying

hi the recent times, composite hydrogen storage materials are considered as viable materials possessing high hydrogen storage capacity and fast sorption kinetics at ambient or high temperature conditions. However the synthesis of the composite materials involving conventional induction melting route is expensive and rather difficult to control the sublimation process of elemental ingredients (say Mg) whose heats of vapourization are low. In view of the above said aspects, there is an ever, on going search of new synthesis routes for developing such composite materials. Among the various synthesis routes, mechanical alloying employing. high energy attritor ball mill seems to be a viable method due to the following features: (i) better homogeneity; (ii) no sublimation of materials; (iii) reduced and uniform particle size; (iv) large scale production and (v) economical. The present study focuses on the development of Mg-based composite hydrogen storage materials [Mg - xwt.% AB(5) (AB(5) = MmNi(4.6)Fe(0.4), CFMmNi(5))] prepared through mechanical alloying (high energy attritor ball mill), their hydrogenation dehydrogenation behaviour and structural/microstructural characterizations.