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Electrolytes and Metal Hydride Batteries

United States Patent Application

20160141723
A1
View the Complete Application at the US Patent & Trademark Office
Metal hydride batteries comprising an electrolyte composition which comprises an aqueous solution comprising one or more compounds selected from the group consisting of metal hydroxides, metal oxide/hydroxides and ammonium hydroxides where when the electrolyte composition comprises KOH, the composition also comprises a further compound selected from the group consisting of metal hydroxides, metal oxide/hydroxides and ammonium hydroxides, exhibit reduced degradation of the anode material during operation. Anode materials advantageously exhibit .ltoreq.95% of the degradation of the same anode material in the same battery when replacing the electrolyte composition with 6 M aqueous KOH and exhibit conductivity of .gtoreq.50% of that of 6 M aqueous KOH. Anode materials are for example ABx high capacity hydrogen storage alloys comprising Mg where x is from about 0.5 to about 5 and which has a discharge capacity of .gtoreq.400 mAh/g.
Nei, Jean (Southgate, MI), Young, Kwo (Troy, MI), Rotarov, Damian (Ann Arbor, MI)
14/ 540,191
November 13, 2014
GOVERNMENT SUPPORT STATEMENT [0001] This invention was made with government support under DE-AR0000386 awarded by Advanced Research Projects Agency-Energy under the Robust Affordable Next Generation EV Storage Program (RANGE). The government has certain rights in the invention.