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Non-stoichiometric AB5 alloys for metal hydride electrodes

United States Patent

May 29, 2001
View the Complete Patent at the US Patent & Trademark Office
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The present invention provides a non-stoichiometric alloy comprising a composition having the formula AB.sub.5+X an atomic ratio wherein A is selected from the group consisting of the rare earth metals, yttrium, mischmetal, or a combination thereof; B is nickel and tin, or nickel and tin and at least a third element selected from the group consisting of the elements in group IVA of the periodic table, aluminum, manganese, iron, cobalt, copper, antimony or a combination thereof; X is greater than 0 and less than or equal to about 2.0; and wherein at least one substituted A site is occupied by at least one of the B elements. An electrode incorporating said alloy and an electrochemical cell incorporating said electrode are also described.
Reilly; James J. (Bellport, NY), Adzic; Gordana D. (Setauket, NY), Johnson; John R. (Calverton, NY), Vogt; Thomas (Cold Spring Harbor, NY), McBreen; James (Bellport, NY)
Brookhaven Science Associates (Upton, NY)
09/ 163,238
September 30, 1998
This invention was made with Government support under contract number DE-AC02-98CH10886, awarded by the U.S. Department of Energy. The Government has certain rights in the invention.