US 11,901,511 B2
Nonaqueous electrolyte, lithium-ion battery, battery module, battery pack, and apparatus
Peipei Chen, Ningde (CN); Chengdu Liang, Ningde (CN); Chenghua Fu, Ningde (CN); and Junmin Feng, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Mar. 1, 2021, as Appl. No. 17/189,084.
Application 17/189,084 is a continuation of application No. PCT/CN2019/108603, filed on Sep. 27, 2019.
Claims priority of application No. 201811141756.2 (CN), filed on Sep. 28, 2018.
Prior Publication US 2021/0202997 A1, Jul. 1, 2021
Int. Cl. H01M 10/0569 (2010.01); H01M 10/0567 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 10/0569 (2013.01) [H01M 10/0525 (2013.01); H01M 10/0567 (2013.01); H01M 2220/20 (2013.01); H01M 2300/0037 (2013.01)] 14 Claims
 
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;

OG Complex Work Unit Chemistry
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;

OG Complex Work Unit Chemistry
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%.