Patent ID: 9601803
Date: 2017-03-21
CPC Classifications: H01M,Y02E,Y02P,Y02T

Claim:
1. A separator-electrolyte layer product for use in a lithium battery, said separator-electrolyte layer product comprising: (a) a porous thin-film separator selected from a porous polymer film, a porous mat, fabric, paper made of polymer or glass fibers, or a combination thereof, wherein said porous thin-film separator has a thickness of less than 500 μm and has pores that allow for lithium ion migration; and (b) a non-flammable quasi-solid electrolyte containing a lithium salt dissolved in a first liquid solvent at a lithium salt concentration greater than 7 M (mole/L), 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 and wherein said porous thin-film separator is coated with said non-flammable quasi-solid electrolyte so that said separator-electrolyte layer product 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.