	US 11,688,882 B2
	Electrolytes and separators for lithium metal batteries
Meinan He, Madison Heights, MI (US); Mei Cai, Bloomfield Hills, MI (US); and Biqiong Wang, Madison Heights, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Oct. 30, 2020, as Appl. No. 17/85,744.
Prior Publication US 2022/0140394 A1, May 5, 2022
Int. Cl. H01M 10/0568 (2010.01); H01M 10/0569 (2010.01); H01M 10/052 (2010.01); H01M 50/411 (2021.01); H01M 50/431 (2021.01); H01M 50/449 (2021.01); H01M 4/38 (2006.01); H01M 4/36 (2006.01); H01M 4/62 (2006.01); H01M 4/02 (2006.01)

CPC H01M 10/0568 (2013.01) [H01M 4/366 (2013.01); H01M 4/382 (2013.01); H01M 4/62 (2013.01); H01M 10/052 (2013.01); H01M 10/0569 (2013.01); H01M 50/411 (2021.01); H01M 50/431 (2021.01); H01M 50/449 (2021.01); H01M 2004/027 (2013.01); H01M 2300/0034 (2013.01); H01M 2300/0037 (2013.01)]

17 Claims

1. An electrochemical cell that cycles lithium ions comprising:

a separator having a plurality of pores and one or more coatings at least partially coating pore walls of the plurality of pores, at least one of the one or more coatings comprising alucone; and

a liquid electrolyte system at least partially filling the pores, wherein the liquid electrolyte system comprises:

two or more lithium salts, wherein the two or more lithium salts comprises greater than or equal to about 0.1M to less than or equal to about 0.9M of a first lithium salt and greater than or equal to about 0.1M to less than or equal to about 0.9M of a second lithium salt, wherein the first lithium salt is lithium bis(fluorosulfonyl)imide (LiN(FSO₂)₂) (LIFSI) and the second lithium salt is lithium perchlorate (LiClO₄); and

two or more solvents, wherein the two or more solvents comprises a first solvent and a second solvent, wherein the first solvent is a fluorinated cyclic carbonate and the second solvent is a linear carbonate, wherein a volumetric ratio of the first solvent to the second solvent is 1:4.