초록 ▼

Disclosed is a nanocrystalline composite useful for hydrogen storage, which provides optimum hydrogenation conditions along with high hydrogen storage capacity. This composite is the combination of at least one high temperature metal hydride such as Mg or Mg.sub.2 Ni, which has a high hydrogen stora

Disclosed is a nanocrystalline composite useful for hydrogen storage, which provides optimum hydrogenation conditions along with high hydrogen storage capacity. This composite is the combination of at least one high temperature metal hydride such as Mg or Mg.sub.2 Ni, which has a high hydrogen storage capacity by weight but requires high temperatures for hydrogen absorption and desorption, with at least one low temperature metal hydride such as FeTi, LaNi.sub.5, Nb, Mn or Pd, which has a low hydrogen storage capacity by weight but does not require high temperatures for hydrogen absorption and desorption. The high and low temperature metal hydrides are in direct contact with each other and each in the form of a nanocrystalline powder or layer. This composite is particularly useful as a hydrogen supply source for hydrogen-fueled vehicles.

대표청구항 ▼

[ What is claimed is:] [1.] A nanocrystalline composite for hydrogen storage, said composite consisting essentially of:a) at least one first hydrogen carrier hereinafter called "high temperature metal hydride", which has a high hydrogen storage capacity by weight but requires high temperatures for h

[ What is claimed is:] [1.] A nanocrystalline composite for hydrogen storage, said composite consisting essentially of:a) at least one first hydrogen carrier hereinafter called "high temperature metal hydride", which has a high hydrogen storage capacity by weight but requires high temperatures for hydrogen absorption and desorption; andb) at least one second hydrogen carrier hereinafter called "low temperature metal hydride", which has a low hydrogen storage capacity by weight but does not require high temperatures for hydrogen absorption and desorption,wherein said at least one high temperature metal hydride is selected from the group consisting of Mg, Na, Cs, Mg.sub.2 Ni, or their alloys with other elements, Be alloys and Li alloys and said at least one low temperature metal hydride is selected from the group consisting of FeTi, LaNi.sub.5, Ni, V, Mn, and Pd;wherein said composite comprises from 70 to 95% by weight of said at least one high temperature metal hydride and from 5 to 30% by weight of said at least one low temperature metal hydride; andwherein said at least one high temperature metal hydride and said at least one low temperature metal hydride are in contact with each other and each in the form of a nanocrystalline powder.