Li-Ion Batteries With Increased Electrochemical Stability Window

Abstract

The present disclosure provides aqueous electrolytes with a lower salt concentration and wider electrochemical stability window compared to water-in-salt electrolytes. The aqueous electrolyte composition of the disclosure comprises an anti-solvent, which reduces the H2O activity and the amount of H2O in the Li-ion solvation sheath. In one particular embodiment of the disclosure provides a nonflammable aqueous electrolyte composition for a lithium-ion battery, wherein the aqueous electrolyte composition comprises: an electrolyte salt comprising a lithium salt; water; and an organic component that is miscible with water. In some embodiments, the electrochemical stability window of the aqueous electrolyte composition is greater than 3.0 V and a molality of an electrolyte salt in said aqueous electrolyte composition is about 5 m or less.

Dependencies are inferred from the claim text.