Patent ID: 9601805
Date: 2017-03-21
CPC Classifications: H01M,Y02E

Claim:
1. A process for producing a separator-electrolyte layer for use in a lithium battery, said process comprising: (a) providing a porous thin-film separator, wherein said porous thin-film separator has a thickness of less than 500 μm and has pores that allow for lithium ion migration; (b) providing a non-flammable quasi-solid electrolyte containing a lithium salt dissolved in a first liquid solvent at a first concentration greater than 7 M (mole/L); and (c) coating or impregnating said porous thin-film separator with said non-flammable quasi-solid electrolyte to obtain said separator-electrolyte layer with a final lithium salt concentration equal to or greater than said first concentration, wherein the ions of the lithium salt retain or capture molecules of the first liquid solvent to a degree that results in supersaturation of the non-flammable quasi-solid electrolyte without precipitation or crystallization of said lithium salt so that said non-flammable quasi-solid electrolyte exhibits a vapor pressure of less than 0.01 kPa when measured at 20° C., a vapor pressure of less than 60% of the vapor pressure of said first liquid solvent alone, a flash point of at least 20° C. higher than a flash point of said first liquid solvent alone, a flash point higher than 150° C., or no detectable flash point.