CuMg.sub.2-y Li.sub.x ALLOY FOR HYDROGEN STORAGE

Abstract

The present invention refers to the ability of a metallic alloy to store hydrogen. Particularly, the present invention refers to the ability of an alloy, with hexagonal structure, to store, in reversible way, high amounts of hydrogen at temperatures and pressures that make an industrial applicability feasible. The present invention is applicable, e.g. for hydrogen storage—hydrogen fuel cells—with great applicability in the automobile industry.

1 . An alloy of copper (Cu), lithium (Li) and magnesium (Mg) for hydrogen storage, characterized for presenting a stoichiometry corresponding to CuMg 2-y Li x , with 0<x≦0.5 and 0<x≦0.5, and with a hexagonal structure. 
   
   
       2 . The alloy, according to  claim 1 , characterized for comprising a mixture with the Cu 2 Mg phase. 
   
   
       3 . The alloy, according to  claim 1 , characterized for comprising a mixture with the CuMg 2  phase. 
   
   
       4 . The alloy, according to  claim 1 , characterized for not being milled or, when in the form of powder, characterized for the particles having a diameter in the range 75 μm-50 nm. 
   
   
       5 . Use of the alloy, according to  claim 1 , characterized for being employed for hydrogen storage and release. 
   
   
       6 . Use of the alloy, according to  claim 5 , characterized for hydrogen storage in the range 3-6% (weight) of the alloy. 
   
   
       7 . Use of the alloy according to  claim 5 , characterized for hydrogen storage at a temperature between 273 K (0° C.) and 423 K (150° C.), and at a pressure between 1 and 5 bar. 
   
   
       8 . Use of the alloy according to  claim 5 , characterized for hydrogen release at a temperature between room-temperature and 423° K (150° C.) and at a pressure of 1-5 bar.