US 11,949,073 B2
Nonaqueous electrolytic solution, lithium-ion battery, battery module, battery pack, and apparatus
Peipei Chen, Ningde (CN); Chenghua Fu, Ningde (CN); Junmin Feng, Ningde (CN); and Chengdu Liang, Ningde (CN)
Assigned to CONTEMPORATY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Dec. 23, 2020, as Appl. No. 17/132,591.
Application 17/132,591 is a continuation of application No. PCT/CN2019/108605, filed on Sep. 27, 2019.
Claims priority of application No. 201811140362.5 (CN), filed on Sep. 28, 2018.
Prior Publication US 2021/0119262 A1, Apr. 22, 2021
Int. Cl. H01M 10/00 (2006.01); H01M 4/485 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 10/0568 (2010.01); H01M 10/0569 (2010.01); H01M 50/40 (2021.01); H01M 4/02 (2006.01)
CPC H01M 10/0569 (2013.01) [H01M 4/485 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); H01M 10/0568 (2013.01); H01M 50/40 (2021.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 2220/20 (2013.01); H01M 2300/004 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A lithium-ion battery, comprising a positive electrode plate, a negative electrode plate, a separator, and a nonaqueous electrolytic solution, wherein the nonaqueous electrolytic solution comprises a nonaqueous solvent and a lithium salt; and
the nonaqueous solvent comprises a carbonate solvent and a high-oxidation-potential solvent, the carbonate solvent is a mixture of a cyclic carbonate and a chain carbonate, and the high-oxidation-potential solvent is selected from one or more of compounds denoted by Formula I and Formula II:

OG Complex Work Unit Chemistry
in Formula I, R1 and R2 are separately selected from unsubstituted, partially halogenated, or fully halogenated alkyls that comprise 1 to 5 carbon atoms, and at least one of R1 or R2 is a partially halogenated or fully halogenated alkyl that comprises 1 to 5 carbon atoms;
in Formula II, R3 is selected from partially halogenated or fully halogenated alkylidenes that comprise 4 to 6 carbon atoms;
a halogen atom thereof is selected from the group consisting of F, Cl, Br, and I;
the chain carbonate is selected from the group consisting of an ethyl methyl carbonate, a methyl propyl carbonate, a methyl isopropyl carbonate, a methyl butyl carbonate, an ethylene propyl carbonate, a dimethyl carbonate, a diethyl carbonate, a dipropyl carbonate, a dibutyl carbonate, or any combinations thereof;
the cyclic carbonate is selected from the group consisting of an ethylene carbonate, a propylene carbonate, or a combination thereof;
based on a total weight of the nonaqueous solvent, a weight percent content of the cyclic carbonate is 2-10%, a weight percent content of the linear carbonate is 35-65%, and a weight percent content of the high-oxidation-potential solvent is 10%-60%.