Electrolytes for lithium-containing battery cells
AssigneeApple Inc.
InventorsWoo Cheol Shin, Soonho Ahn
Life of this patent
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Abstract
An electrolyte for a lithium-containing battery cell is described. The electrolyte includes a solvent having at least one carbonate ester, and at least one lithium salt having a concentration ranging from 3 mol/liter to 15 mol/liter in the solvent. The electrolyte also includes a diluent that includes an aromatic fluorocarbon. In some embodiments, the solution of the at least one lithium salt and the solvent is a supersaturated solution for at least some operating temperatures of the battery cell. Also described are lithium-containing battery cells that include a positive electrode, a negative electrode, and the electrolyte.
Claims20
An electrolyte for a lithium-containing battery cell, the electrolyte comprising:
- a solvent comprising at least one carbonate ester;
- at least one lithium salt having a concentration ranging from 5 mol/liter to 15 mol/liter in the solvent;
- and
- a diluent comprising an aromatic fluorocarbon, wherein the aromatic fluorocarbon has a formula:
- where R1-R6 are each independently, a hydrogen atom, a fluorine atom, a non-fluorinated C1-C6 alkyl group, or a fluorinated C1-C6 alkyl group, and wherein at least two of R1-R6 include a fluorine atom,
- wherein the diluent represents greater than 50% by volume of the electrolyte.
A lithium-containing battery cell comprising:
- a positive electrode;
- a negative electrode;
- and
- a lithium-containing electrolyte, wherein the lithium-containing electrolyte comprises:
- a solvent comprising at least one carbonate ester;
- at least one lithium salt having a concentration ranging from 5 mol/liter to 15 mol/liter in the solvent;
- and
- a diluent comprising an aromatic fluorocarbon, wherein the aromatic fluorocarbon has a formula:
- where R1-R6 are each independently, a hydrogen atom, a fluorine atom, a non-fluorinated C1-C6 alkyl group, or a fluorinated C1-C6 alkyl group, and wherein at least two of R1-R6 include a fluorine atom,
- wherein the diluent represents greater than 50% by volume of the lithium-containing electrolyte.
Dependencies are inferred from the claim text.