Patent ID: 7510996

Claim:
A hydrogen storage material, expressed by a composition formula, (Ca 1-x A x ) 1-z (Si 1-y B y ) z , wherein â€œAâ€ is at least one member selected from the group consisting of alkali metal elements, alkaline-earth metal elements, rare-earth elements, the elements of groups 3 through 6, Ni, Au, In, Tl, Sn, Fe, Co, Cu and Ag; â€œBâ€ is at least one member selected from the group consisting of the elements of groups 7 through 12 and 14 through 17, Al, Ga, In, Tl, rare-earth elements, Hf and Be; â€œxâ€ falls in a range of from 0 (not inclusive) to 1 (not inclusive) by atomic ratio, 0<x<1; â€œyâ€ falls in a range of from 0 (not inclusive) to 1 (not inclusive) by atomic ratio, 0<y<1; and â€œzâ€ falls in a range of from 0.38 (inclusive) to 0.58 (inclusive) by atomic ratio, 0.38â‰¦zâ‰¦0.58.