Electrolytes Comprising Steric Ethers for Lithium-Metal Batteries

Abstract

Described herein are liquid electrolytes for lithium-metal batteries, as well as lithium-metal batteries comprising such electrolytes in addition to lithium-metal negative electrodes and positive electrodes. In some examples, a liquid electrolyte comprises one or more lithium-containing salts in the liquid electrolyte, one or more steric-ether solvents, one or more tertiary partially fluorinated ethers, and (optionally) one or more electrolyte additives. Some examples of steric-ether solvents include 1,2-dimethoxy propane (DMIP), methyl (3-methoxypropyl) ether (MMPE), 2,2-difluoro-1,3-diethoxy propane (FDEPr), 1,2-diethoxyethane (DEE), 1-methoxy 2-ethoxy ethane (MEE), 2-(2-(2,2-difluoroethoxy)ethoxy)-ethane (F2EE), 1-propoxy 2-methoxy ethane (PME), 1-isopropoxy 2-methoxy ethane (IPME), 2-(2,2-difluoroethoxy)ethoxy methane (F2ME), 1-propoxy 2-ethoxy ethane (PEE), 1-isopropoxy 2-ethoxy ethane (IPEE), and 2-(2,2,2-trifluoroethoxy)ethoxy methane (F3ME). 2-(2-(2,2-difluoroethoxy)ethoxy)-1,1,1-trifluoroethane (F5) may be used as a tertiary partially fluorinated ether, while 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropylether (TTE) may be used as a diluent.

Dependencies are inferred from the claim text.