Kabushiki Kaisha Toyota Chuo Kenkyusho

Nobuko Oba

Masakazu Aoki

Shin-ichi Towata

Tatsuo Noritake

A hydrogen storage material is expressed by a composition formula, (CaA)(SiB), wherein 'A' 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; 'B' is at least one member selected from the group consisting of the elements of groups 7 through 17, rare-earth elements, Hf and Be; 0&#x2266;x&#x3c;1 by atomic ratio; 0&#x2266;y&#x3c;1 by atomic ratio; and 0.38&#x2266;z&#x2266;0.58 by atomic ratio. It is lightweight as well as less expensive. In principle, neither high-temperature nor high-pressure activation is required, because it exhibits a high initial activity. The operation temperature can be lowered and the hydrogen absorption content can be enlarged by controlling the kind and substitution proportion of the substituent elements appropriately.

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Aichi-gun, Japan

Nobuko Oba