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Lithium sulfur batteries and electrolytes and sulfur cathodes thereof

United States Patent

9,660,265
May 23, 2017
View the Complete Patent at the US Patent & Trademark Office
Lithium sulfur battery cells that use water as an electrolyte solvent provide significant cost reductions. Electrolytes for the battery cells may include water solvent for maintaining electroactive sulfur species in solution during cell discharge and a sufficient amount of a cycle life-enhancing compound that facilitates charging at the cathode. The combination of these two components enhances one or more of the following cell attributes: energy density, power density and cycle life. For instance, in applications where cost per Watt-Hour (Wh) is paramount, such as grid storage and traction applications, the use of an aqueous electrolyte in combination with inexpensive sulfur as the cathode active material can be a key enabler for the utility and automotive industries, for example, providing a cost effective and compact solution for load leveling, electric vehicles and renewable energy storage. Sulfur cathodes, and methods of fabricating lithium sulfur cells, in particular for loading lithium sulfide into the cathode structures, provide further advantages.
Visco; Steven J. (Berkeley, CA), Goncharenko; Nikolay (Walnut Creek, CA), Nimon; Vitaliy (San Francisco, CA), Petrov; Alexei (Walnut Creek, CA), Nimon; Yevgeniy S. (Danville, CA), De Jonghe; Lutgard C. (Lafayette, CA), Katz; Bruce D. (Moraga, CA), Loginova; Valentina (Walnut Creek, CA)
POLYPLUS BATTERY COMPANY (Berkeley, CA)
14/ 657,695
March 13, 2015
STATEMENT OF GOVERNMENT SUPPORT This invention was made with Government support under Award No.: DE-AR0000349 awarded by the Advanced Research Projects Agency-Energy (ARPA-E), U.S. Department of Energy. The Government has certain rights in this invention.