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Alkaline Battery Electrolyte Useful for a Rechargeable Alkaline Electrochemical Cell

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
The invention provides an electrolyte composition which is adapted for use in a rechargeable alkaline electrochemical cell, and especially preferably adapted for use in a rechargeable manganese zinc electrochemical cell, which electrolyte composition imparts improved performance characteristics to the rechargeable alkaline electrochemical cell. The electrolyte composition includes an electrolyte composition in which contains a potassium hydroxide and lithium hydroxide in a concentration and a respective molar ratio of about 1 molar potassium hydroxide to 2.5-3.7 (preferably 1:3) molar lithium hydroxide (1 M KOH:2.5-3.7 M LiOH). Also provided are alkaline electrochemical cells and alkaline batteries comprising the electrolyte compositions. The resultant alkaline electrochemical cells and alkaline batteries exhibit improved performance characteristics, as the electrolyte composition significantly inhibits the passivation of Zn, and may also be useful in this role in other battery chemistries.
STEINGART, Daniel (Princeton, NJ), HERTZBERG, Benjamin (New York, NY), CHAMOUN, Mylad (Princeton, NJ), DAVIES, Greg (Princeton, NJ), MENG, Ying Shirley (San Diego, CA)
15/ 560,599
April 5, 2016
[0002] This invention was made with government support under Grant No. DE-AR0000400 awarded by the U.S. Department of Energy, Advanced Research Projects Agency-Energy (ARPA-E). The government has certain rights in the invention.