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- Nachgewiesen in: USPTO Patent Applications
- Sprachen: English
- Document Number: 20200014065
- Publication Date: January 9, 2020
- Appl. No: 15/572593
- Application Filed: August 24, 2017
- Assignees: Contemporary Amperex Technology Co., Limited (Ningde City, Fujian, CN)
- Claim: 1. A Lithium ion battery electrolyte comprising an organic solvent, a lithium salt, and an additive, wherein the said additive comprises a cyclic fluoro carbonate (A), a cyclic phosphazene (B), a cyclic sulfate (C) and a lithium fluoro oxalate borate (D), the lithium fluoro oxalate borate (D) has following formula: [chemical expression included] wherein R10 and R11 are each independently selected from one of H, a halogen atom, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, a haloalkyl group having 1 to 20 carbon atoms, a haloalkenyl group having 2 to 20 carbon atoms, a haloalkynyl group having 2 to 20 carbon atoms, a haloaryl group having 6 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an alkenyloxy group having 2 to 20 carbon atoms, an alkynyloxy group having 2 to 20 carbon atoms, an aryloxy group having 1 to 20 carbon atoms, a haloalkoxy group having 2 to 20 carbon atoms, a haloalkenyloxy group having 2 to 20 carbon atoms, a haloalkynyloxy group having 2 to 20 carbon atoms, a haloaryloxyl group having 6 to 20 carbon atoms and at least one of R10 and R11 contains a fluorine atom.
- Claim: 2. The Lithium ion battery electrolyte according to claim 1, wherein the lithium fluoro oxalate borate is selected from at least one of the compounds represented by D1 to D22: [chemical expression included] [chemical expression included] [chemical expression included]
- Claim: 3. The Lithium ion battery electrolyte according to claim 2, wherein the lithium fluoro oxalate borate is present in an amount of 0.1 to 8%, based on the total weight of the electrolyte.
- Claim: 4. The Lithium ion battery electrolyte according to claim 1, wherein the cyclic fluoro carbonate has following formula: [chemical expression included] wherein R1 is selected from a halogen atom or a haloalkyl group containing a fluorine atom having 1 to 20 carbon atoms.
- Claim: 5. The Lithium ion battery electrolyte according to claim 4, wherein the cyclic fluoro carbonate is present in an amount of 0.5 to 45%, based on the total weight of the electrolyte.
- Claim: 6. The Lithium ion battery electrolyte according to claim 1, wherein the cyclic phosphazene has following formula: [chemical expression included] wherein R2, R3, R4, R5, R6 and R7 are each independently selected from one of H, a halogen atom, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, a haloalkyl group having 1 to 20 carbon atoms, a haloalkenyl group having 2 to 20 carbon atoms, a haloalkynyl group having 2 to 20 carbon atoms, a haloaryl group having 6 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an alkenyloxy group having 2 to 20 carbon atoms, an aryloxy group having having 6 to 20 carbon atoms, a haloalkoxy group having 1 to 20 carbon atoms, a haloalkenyloxy group having 2 to 20 carbon atoms, a halo alkynyloxy group having 2 to 20 carbon atoms, and a haloaryloxy group having 6 to 20 carbon atoms and at least two of R3, R5 and R7 are selected from a halogen atom.
- Claim: 7. The Lithium ion battery electrolyte according to claim 6, wherein the cyclic phosphazene is present in an amount of 0.1 to 10%, based on the total weight of the electrolyte.
- Claim: 8. The Lithium ion battery electrolyte according to claim 1, wherein the cyclic sulfate has following formula: [chemical expression included] wherein R8 and R9 are each independently selected from one of H, a halogen atom, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, a haloalkyl group having 1 to 20 carbon atoms, a haloalkenyl group having 2 to 20 carbon atoms, a haloalkynyl group having 2 to 20 carbon atoms, a haloaryl group having 6 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an alkenyloxy group having 2 to 20 carbon atoms, an alkynyloxy group having 2 to 20 carbon atoms, an aryloxy group having 1 to 20 carbon atoms, a haloalkoxy group having 2 to 20 carbon atoms, a haloalkenyloxy group having 2 to 20 carbon atoms, a haloarkylnyloxy group having 2 to 20 carbon atoms and a haloaryloxy group having 6 to 20 carbon atoms.
- Claim: 9. The Lithium ion battery electrolyte according to claim 8, wherein the cyclic sulfate is present in an amount of 0.1 to 8%, based on the total weight of the electrolyte.
- Claim: 10. The Lithium ion battery electrolyte according to claim 1, wherein the additive further comprises at least one of lithium difluorophosphate (LiPO2F2) and lithium bis(fluorosulfonyl)imide (LiFSI).
- Claim: 11. The Lithium ion battery electrolyte according to claim 10, wherein the lithium difluorophosphate (LiPO2F2) is present in an amount of 0.1 to 5% based on the total weight of the electrolyte.
- Claim: 12. The Lithium ion battery electrolyte according to claim 10, wherein the lithium bis(fluorosulfonyl)imide (LiFSI) is present in an amount of 0.1 to 5% based on the total weight of the electrolyte.
- Claim: 13. A Lithium ion battery comprising: a positive electrode, a negative electrode, a separator between the positive electrode and the negative electrode, and an electrolyte, wherein the electrolyte is the Lithium ion battery electrolyte according to claim 1.
- Claim: 14. The Lithium ion battery according to claim 13, wherein the negative electrode comprises a silicon-carbon composite.
- Claim: 15. The Lithium ion battery electrolyte according to claim 2, wherein the lithium fluoro oxalate borate is present in an amount of 0.1 to 3%, based on the total weight of the electrolyte.
- Claim: 16. The Lithium ion battery electrolyte according to claim 4, wherein the cyclic fluoro carbonate is present in an amount of 15 to 25%, based on the total weight of the electrolyte.
- Claim: 17. The Lithium ion battery electrolyte according to claim 6, wherein the cyclic phosphazene is present in an amount of 1 to 5%, based on the total weight of the electrolyte.
- Claim: 18. The Lithium ion battery electrolyte according to claim 8, wherein the cyclic sulfate is present in an amount of 1 to 3%, based on the total weight of the electrolyte.
- Current International Class: 01; 01; 01; 01; 01
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