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LaNi.sub.5 is-based metal hydride electrode in Ni-MH rechargeable cells

United States Patent

5,888,665
March 30, 1999
View the Complete Patent at the US Patent & Trademark Office
An at least ternary metal alloy of the formula AB.sub.(Z-Y) X.sub.(Y) is disclosed. In this formula, A is selected from the rare earth elements, B is selected from the elements of Groups 8, 9, and 10 of the Periodic Table of the Elements, and X includes at least one of the following: antimony, arsenic, germanium, tin or bismuth. Z is greater than or equal to 4.8 and less than or equal to 6.0. Y is greater than 0 and less than 1. Ternary or higher-order substitutions to the base AB.sub.5 alloys that form strong kinetic interactions with the predominant metals in the base metal hydride are used to form metal alloys with high structural integrity after multiple cycles of hydrogen sorption.
Bugga; Ratnakumar V. (Arcadia, CA), Fultz; Brent (Pasadena, CA), Bowman; Robert (La Mesa, CA), Surampudi; Subra Rao (Glendora, CA), Witham; Charles K. (Pasadena, CA), Hightower; Adrian (Pasadena, CA)
California Institute of Technology (Pasadena, CA)
08/ 764,849
December 13, 1996
ORIGIN OF INVENTION This invention was made in the course of work done under a contract with the Department of Energy and is subject to the provisions of Public Law 96-517 (35 U.S.C. .sctn.202) in which the contractor has elected to retain title.