Patent ID: 6514478
Filing Date: 2003-02-04
Classification: C01B,Y02E

Abstract:
A reversible hydrogen storage composition having a hydrogenated state from which hydrogen is liberated and a dehydrogenated state which absorbs gaseous hydrogen to produce said hydrogenated state, wherein said hydrogenated state comprises:a hydrided mechanically alloyed crystalline composition of lithium and a component selected from the group consisting of: a) at least one metal M which forms a hydride, said hydrided composition liberating hydrogen to form a dehydrogenated state comprising LiH and said at least one metal M; b) at least one element E selected from the group consisting of C, B, Si, P. Zn, Mn, Fe, Cr, Cu, Al, Ca, Na and K, said hydrided composition liberating hydrogen to form a dehydrogenated state comprising a compound of lithium and said at least one element E, or a solid solution of lithium and said at least one element E; and c) at least one metal M and at least one element E, as defined above, said hydrogenated state liberating hydrogen at a temperature of 100 to 300Â° C., and said hydrogenated state being regenerated from said dehydrogenated state at a temperature of 100Â° C. to 350Â° C. under a gaseous hydrogen atmosphere at a pressure of 5 to 60 atmospheres.