Abstract: The material is derived from the compound TiNi, is a single-phase material and is expressed by the following general formula:(Ti.sub.[1-(x+y)] Zr.sub.x M.sub.y)Ni.sub.zwhere: ##EQU1## where M is chosen from vanadium V, silicon Si, and a combination of vanadium and of silicon. Preferably, the hydridable material satisfies the following formulae:(Ti.sub.0.7 Zr.sub.0.2 V.sub.0.1)Nior(Ti.sub.0.5 Zr.sub.0.4 Si.sub.0.1)NiThe hydridable material is a single-phase material and has a body-centered cubic lattice, with a lattice parameter of about 3 .ANG..

Abstract: The present invention provides a hydridable material for the negative electrode of a nickel-hydride storage cell mainly comprising a Laves phase of the C14 hexagonal type (MgZn.sub.2), characterized by the general formula: ##EQU1## where A represents at least one element from Ti, Y, Ce, Ca, and Mg, and where M is chosen from Cr, V, and Si.

Abstract: A hydridable alloy material represented by the formula AB.sub.5 for the negative electrode of a nickel-hydride storage cell. A represents La.sub.(1-x-y-z) Ce.sub.x Nd.sub.y Pr.sub.z, where 0.ltoreq.x.ltoreq.0.784, 0.ltoreq.z.ltoreq.1, 0.1.ltoreq.x+z, 0<y+z, x+y+z.ltoreq.1, and 0.ltoreq.y.ltoreq.0.205-1.17x+2.39x.sup.2 -1.57x.sup.3 -z(0.23-0.65x+1.18x.sup.2)+z.sup.2 (0.18-0.54x), and B represents Ni partially substituted by Mn, Al and Co.