Saft

Saft Groupe Sa

Societe Anonyme Dite: Saft

Bernard Knosp

Jacques Bouet

Annick Percheron-Guegan

Patrick Bernard

Christian Jordy

Jean-Michel Cocciantelli

Michelle Baudry

Olivier Canet

Michele Baudry

Michel Mimoun

Daniel Gicquel

The invention proposes a composition comprising: The invention also relates to an anode comprising the composition according to the invention. The invention also relates to an alkaline electrolyte battery comprising said at least one anode.

Composition for negative electrode of alkaline electrolyte battery

An active material composition for an alkaline storage battery comprises a) an alloy capable of forming a hydride, of formula RMgNiMin which R is La, optionally substituted by Nd and/or Pr, M is at least one element chosen from the group comprising Mn, Fe, Al, Co, Cu, Zr and Sn, in which 0.1&#x2266;y&#x2266;0.4, 3.2&#x2266;t&#x2266;3.5, and z&#x2266;0.5, and of which the equilibrium hydrogen pressure with the alloy, for a hydrogen insertion into the alloy of 0.5 H/Metal at 40&#xb0;, is less than 0.7 bar, and b) a yttrium-based compound in a mixture with alloy a).

Alkaline electrolyte storage battery having an anode formed of an active material composition

A monophase hydridable material for the negative electrode of a nickel-metal hydride storage battery with a 'Lave's phase' structure of hexagonal C14 type (MgZn.sub.2) has the general formula:

Hydridable material for the negative electrode in a nickel-metal hydride

The material is derived from the compound TiNi, is a single-phase material and is expressed by the following general formula:

Hydridable material for the negative electrode of a nickel-hydride

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.

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&lt;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.

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Neuilly sur Seine, France

Bernard Knosp