Patent ID: 11901511
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A lithium-ion battery, comprising a nonaqueous electrolyte comprising a nonaqueous solvent, a lithium salt, and an additive, wherein
the nonaqueous solvent comprises a carbonate solvent and a high oxidation potential solvent, the additive comprises cyclic sulfate;
the high oxidation potential solvent is selected from one or more of compounds represented by formula I and formula II;, in formula I, R1 and R2 are independently selected from unsubstituted, partially halogenated, or fully halogenated alkyl groups having 1 to 5 carbon atoms, and at least one of R1 and R2 is a partially halogenated or fully halogenated alkyl group having 1 to 5 carbon atoms; and in formula II, R3 is selected from partially halogenated or fully halogenated alkylidene groups having 3 to 6 carbon atoms;
the cyclic sulfate is selected from one or more of compounds represented by formula III;, in formula III, R4 is selected from alkylidene groups having 2 to 6 carbon atoms without halogen substitution; and
the halogenated groups in formula I and II comprise a halogen atom selected from one or more of F, Cl, Br, and I;
wherein based on a total weight of the non-aqueous solvent,
a weight percentage of the high oxidation potential solvent is 10% to 60%;
a weight percentage of the cyclic sulfate solvent is 0.1% to 10%; and
a weight percentage of the carbonate solvent is 40% to 90%.