Lithium ion battery electrolyte including a vitreous eutectic mixture
AssigneeGM Global Technology Operations LLC
InventorsIon C. Halalay, Damon R. Frisch, Olt E. Geiculescu, Darryl D Desmarteau, Stephen E Creager, Changqing Lu
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Abstract
An electrolyte for a lithium ion battery includes a vitreous eutectic mixture represented by the formula AxBy, where A is a salt chosen from a lithium fluoroalkylsulfonimide or a lithium fluoroarylsulfonimide, B is a solvent chosen from an alkylsulfonamide or an arylsulfonamide, and x and y are the mole fractions of A and B, respectively.
Claims14
An ionic liquid for an electrolyte of a lithium ion battery, comprising a binary vitreous eutectic mixture represented by the formula AxBy, wherein:
- A is a salt chosen from a lithium fluoroalkylsulfonimide or a lithium fluoroarylsulfonimide, wherein the lithium fluoroalkylsulfonimide and the lithium fluoroarylsulfonimide are individually represented by the formula:
- wherein R1 is chosen from F, CF3, C2F5, C4F9, an aromatic group, or a fluorinated aromatic group and wherein R2 is chosen from F, C4F9, an aromatic group, or a fluorinated aromatic group;
- B is a solvent chosen from an alkylsulfonamide or an arylsulfonamide;
- x and y are the mole fractions of A and B, respectively;
- a molar ratio of A to B ranges from 1:0.2 to 1:10;
- and
- the eutectic mixture is a liquid at ambient temperature and has a glass transition temperature of less than −50° C.
A lithium ion battery, comprising:
- a cathode;
- an anode;
- and
- an electrolyte operatively disposed between the cathode and the anode, the electrolyte consisting of a binary eutectic mixture represented by the formula AxBy, wherein:
- A is a salt chosen from a lithium fluoroalkylsulfonimide or a lithium fluoroarylsulfonimide, wherein the lithium fluoroalkylsulfonimide and the lithium fluoroarylsulfonimide are individually represented by the formula:
- wherein R1 is chosen from F, CF3, C2F5, C4F9, an aromatic group, or a fluorinated aromatic group and wherein R2 is chosen from F, CF3, C2F5, C4F9, an aromatic group, or a fluorinated aromatic group;
- B is a solvent chosen from an alkylsulfonamide or an arylsulfonamide;
- and
- x and y are the mole fractions of A and B, respectively.
An electrolyte for a lithium ion battery, consisting of a binary vitreous eutectic mixture represented by the formula AxBy, wherein:
- A is a salt chosen from a lithium fluoroalkylsulfonimide or a lithium fluoroarylsulfonimide;
- B is a solvent chosen from an alkylsulfonamide or an arylsulfonamide;
- x and y are the mole fractions of A and B, respectively;
- and
- a molar ratio of A to B ranges from 1:0.2 to 1:10.
Dependencies are inferred from the claim text.