Method of preparing a hydrogen storage material comprising an operation of plastic deformation severe

A hydrogen-storage material is prepared by a process comprising a severe plastic deformation operation selected from the cold rolling, the rapid forging and the bent extrusion: - a metallic material selected from a metal and an alloy said base metal, - a compound based on a metal material selected from a metal and a base alloy of said metal, wherein was added a hydride of said metal or a hydride of said alloy, - or a hydride a metallic material. When the severe plastic deformation operation is performed on the metal material, it is followed by an add operation to the metal material of a hydride of said metal or said alloy hydride and an atmosphere in dispersion operation inert.