US 12,230,803 B2
Secondary battery, method for preparing the same, copolymer and apparatus
Ze Zhong, Ningde (CN); and Hao Dong, Ningde (CN)
Assigned to Contemporary Amperex Technology (Hong Kong) Limited, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on May 17, 2022, as Appl. No. 17/745,935.
Application 17/745,935 is a continuation of application No. PCT/CN2019/122725, filed on Dec. 3, 2019.
Prior Publication US 2022/0285687 A1, Sep. 8, 2022
Int. Cl. H01M 4/62 (2006.01); C08F 210/02 (2006.01); C08F 216/04 (2006.01); C08F 220/54 (2006.01); H01M 50/411 (2021.01); H01M 4/02 (2006.01)
CPC H01M 4/622 (2013.01) [C08F 210/02 (2013.01); C08F 216/04 (2013.01); C08F 220/54 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 50/411 (2021.01)] 12 Claims
OG exemplary drawing
 
1. A copolymer, wherein the copolymer comprises at least a first monomer unit represented by formula (I), a second monomer unit represented by formula (II), and a third monomer unit represented by formula (III):

OG Complex Work Unit Chemistry
in which R1, R2, R3, R5, R6, R7, R9, R10, and R11 are each independently selected from hydrogen or C1-C8 alkyl groups;
R4 is selected from hydrogen, substituted or unsubstituted C1-C8 alkyl groups;
R8 is selected from —COOM and sodium sulfonate phenyl, in which M is selected from H, and positive monovalent (+1) alkali metal ion;
R12 is selected from unsubstituted or substituted C1-C8 alkyl groups, and n is 0 or 1;
wherein the first monomer unit comprises monomer units derived from A1 monomer:

OG Complex Work Unit Chemistry
wherein the second monomer unit comprises monomer units derived from B1 monomer:

OG Complex Work Unit Chemistry
wherein the third monomer unit comprises monomer units derived from C2 monomer:

OG Complex Work Unit Chemistry
wherein based on the total moles of the first monomer unit, the second monomer unit, and the third monomer unit, the first monomer unit is present in an amount of 60 mol % to 80 mol %;
wherein based on the total moles of the first monomer unit, the second monomer unit and the third monomer unit, the second monomer unit is present in an amount of 8 mol % to 18 mol %;
wherein based on the total moles of the first monomer unit, the second monomer unit and the third monomer unit, the third monomer unit is present in an amount of 12 mol % to 24 mol %.
 
12. A method for preparing a secondary battery, including using a copolymer in one or more of a positive electrode plate, a negative electrode plate and a separator, wherein the copolymer comprises at least a first monomer unit represented by formula (I), a second monomer unit represented by formula (II), and a third monomer unit represented by formula (III):

OG Complex Work Unit Chemistry
in which R1, R2, R3, R5, R6, R7, R9, R10, and R11 are each independently selected from hydrogen or C1-C8 alkyl groups;
R4 is selected from hydrogen, substituted or unsubstituted C1-C8 alkyl groups;
R8 is selected from —COOM and sodium sulfonate phenyl, in which M is selected from H, and positive monovalent (+1) alkali metal ion;
R12 is selected from unsubstituted or substituted C1-C8 alkyl groups, and n is 0 or 1;
wherein the first monomer unit comprises monomer units derived from A1 monomer:

OG Complex Work Unit Chemistry
wherein the second monomer unit comprises monomer units derived from B1 monomer:

OG Complex Work Unit Chemistry
wherein the third monomer unit comprises monomer units derived from C2 monomer:

OG Complex Work Unit Chemistry
wherein based on the total moles of the first monomer unit, the second monomer unit, and the third monomer unit, the first monomer unit is present in an amount of 60 mol % to 80 mol %;
wherein based on the total moles of the first monomer unit, the second monomer unit and the third monomer unit, the second monomer unit is present in an amount of 8 mol % to 18 mol %;
wherein based on the total moles of the first monomer unit, the second monomer unit and the third monomer unit, the third monomer unit is present in an amount of 12 mol % to 24 mol %.