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Aqueous lithium air batteries

United States Patent

May 23, 2017
View the Complete Patent at the US Patent & Trademark Office
Aqueous Li/Air secondary battery cells are configurable to achieve high energy density and prolonged cycle life. The cells include a protected a lithium metal or alloy anode and an aqueous catholyte in a cathode compartment. The aqueous catholyte comprises an evaporative-loss resistant and/or polyprotic active compound or active agent that partakes in the discharge reaction and effectuates cathode capacity for discharge in the acidic region. This leads to improved performance including one or more of increased specific energy, improved stability on open circuit, and prolonged cycle life, as well as various methods, including a method of operating an aqueous Li/Air cell to simultaneously achieve improved energy density and prolonged cycle life.
Visco; Steven J. (Berkeley, CA), Nimon; Yevgeniy S. (Danville, CA), De Jonghe; Lutgard C. (Lafayette, CA), Petrov; Alexei (Walnut Creek, CA), Goncharenko; Nikolay (Walnut Creek, CA)
13/ 588,911
August 17, 2012
STATEMENT OF GOVERNMENT SUPPORT This invention was made with Government support under Award No.: DE-AR0000061 awarded by the Advanced Research Projects Agency-Energy (ARPA-E), U.S. Department of Energy. The Government has certain rights in this invention.