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ELECTROLYTE FOR HIGH EFFICIENCY CYCLING OF SODIUM METAL AND RECHARGEABLE SODIUM-BASED BATTERIES COMPRISING THE ELECTROLYTE

United States Patent Application

20160072151
A1
View the Complete Application at the US Patent & Trademark Office
Pacific Northwest National Laboratory - Visit the Technology Commercialization Program Website
Embodiments of a non-aqueous electrolyte for a rechargeable sodium (Na)-based battery comprise a sodium salt and a nonaqueous solvent, the electrolyte having a sodium salt concentration .gtoreq.2.5 M or a solvent-sodium salt mole ratio .ltoreq.4:1. Na-based rechargeable batteries including the electrolyte exhibit both high cycling stability and high coulombic efficiency (CE). Some embodiments of the disclosed batteries attain a CE.gtoreq.80% within 10-30 charge-discharge cycles and maintain a CE.gtoreq.80% for at least 100 charge-discharge cycles. In certain embodiments, the battery is an anode-free battery in the as-assembled initial state.
Zhang, Ji-Guang (Richland, WA), Cao, Ruiguo (Richland, WA), Henderson, Wesley A. (Richland, WA), Mishra, Kuber (Columbia, SC), Xu, Wu (Richland, WA)
Battelle Memorial Institute
14/ 869,647
September 29, 2015
ACKNOWLEDGMENT OF GOVERNMENT SUPPORT [0002] This invention was made with government support under Contract DE-AC05-76RLO1830, awarded by the U.S. Department of Energy. The government has certain rights in the invention.