Resin composition and application thereof, binder, electrode slurry, electrode plate, battery, and electrical device

Patent metadata

Field	Value
Publication number	US-12351669-B2
Application number	US-202418948956-A
Country	US
Kind code	B2
Filing date	Nov 15, 2024
Priority date	Jun 7, 2022
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

A resin composition includes a main polymer and a crosslinking agent. The crosslinking agent is represented by Formula (A). Ar 1 is an aromatic group containing 6 to 50 ring atoms, each L 1 is independently selected from one or more of a single bond, a C 1 to C 50 alkylene, or a dynamic covalent bond group, and each n 1 is independently selected from integers from 1 to 3. A structural unit of the main polymer contains a structure represented by Formula (1). The main polymer contains no aromatic group.

First claim

What is claimed is:

1. A resin composition, comprising a main polymer and a crosslinking agent, wherein the crosslinking agent is represented by Formula (A), (B), or (C):
(HS)n 1 -L 1 -Ar 1 -L 1 -(SH)n 1   (A)

(HS)n 1 -Ar 1 -(SH)n 1   (B)

(HS)n 1 -Ar 1 -L 1 -(SH)n 1   (C)

wherein, Ar 1 is an aromatic group containing 6 to 50 ring atoms, and each L 1 is independently selected from one or more of a C 1 to C 50 alkylene, or a dynamic covalent bond group;
each n 1 is independently selected from integers from 1 to 3; and
a structural unit of the main polymer contains a structure represented by Formula (1), a structure represented by Formula (1A), a structure represented by Formula (1B), and/or a structure represented by Formula (1C), and the main polymer contains no aromatic group:

wherein:
R 1 and R 2 each are one independently selected from a single bond, a substituted or unsubstituted C 1 to C 15 alkylene, a substituted or unsubstituted C 2 to C 15 alkenylene, or a substituted or unsubstituted C 2 to C 15 alkyl ether group;
L 2 is a substituted or unsubstituted C 1 to C 20 hydrocarbon group, and the hydrocarbon group contains an olefinic bond and/or an acetylenic bond; and
* is a linking site.

2. The resin composition according to claim 1 , wherein:
a molar percent of the structural unit containing the structure represented by Formula (1), the structure represented by Formula (1A), the structure represented by Formula (1B), and/or the structure represented by Formula (1C) in the main polymer is not less than 2.5%; and/or
a number-average molecular weight of the main polymer is 2,000 to 2,000,000.

3. The resin composition according to claim 1 , wherein a mass ratio of the crosslinking agent to the main polymer is (0.001 to 0.1):1.

4. The resin composition according to claim 1 , wherein the main polymer contains at least one terminal olefinic bond or one terminal acetylenic bond.

5. The resin composition according to claim 1 , wherein:
R 1 and R 2 each are independently CR 3 R 4 ; and
R 3 and R 4 each are one or more independently selected from hydrogen, a substituted or unsubstituted C 1 to C 10 alkyl, halogen, an ester group, a carboxyl, a carboxyl salt group, a hydroxyl, an amino group, or a cyano group.

6. The resin composition according to claim 1 , wherein the structural unit of the main polymer contains a structure represented by Formula (1-1), a structure represented by Formula (1-2), a structure represented by Formula (1-3), and/or a structure represented by Formula (1-4):

wherein:
each R 5 is one or more independently selected from hydrogen, a substituted or unsubstituted C 1 to C 10 alkyl, halogen, an ester group, a carboxyl, a carboxyl salt group, a hydroxyl, an amino group, or a cyano group; and

R 6 is selected from a substituted or unsubstituted C 1 to C 10 alkylene.

7. The resin composition according to claim 6 , wherein:
each R 5 is independently selected from hydrogen, halogen, or an unsubstituted C 1 to C 5 alkyl; and/or
R 6 is selected from a single bond or a substituted or unsubstituted C 1 to C 5 alkylene.

8. The resin composition according to claim 6 , wherein the main polymer further comprises a structural unit represented by Formula (2):

wherein each R 7 is one or more independently selected from hydrogen, halogen, an ester group, a carboxyl, a carboxyl salt group, a hydroxyl, an amino group, a cyano group, a substituted or unsubstituted C 1 to C 5 alkyl.

9. The resin composition according to claim 1 , wherein Ar 1 is one selected from the following structures:

wherein:
Y is one selected from CR 8 , O, S, or S═O;
each X 1 independently represents CR 9 or N, and not all X 1 symbols in a same structural formula represent N; and
each R 8 and R 9 is independently selected from hydrogen or a substituted or unsubstituted C 1 to C 10 chain alkyl.

10. The resin composition according to claim 1 , wherein a dynamic covalent bond in the dynamic covalent bond group is at least one selected from a borate ester bond, an acylhydrazone bond, or a bond formed by Diels-Alder reaction.

11. A binder, comprising the resin composition according to claim 1 .

12. An electrode slurry, comprising;
a solvent; and
the resin composition according to claim 1 .

13. The electrode slurry according to claim 12 , wherein, based on a total mass of the electrode slurry except the solvent, a mass percent of the resin composition is 1% to 10%.

14. An electrode plate, wherein the electrode plate comprises a current collector and an active layer carried on the current collector, and the active layer is prepared from a raw material comprising the resin composition according to claim 1 .

15. A crosslinking resin, having a three-dimensional network structure formed by linking the main polymer and the crosslinking agent in the resin composition according to claim 1 through a crosslinking site, the crosslinking site comprises a carbon-sulfur single bond formed by an unsaturated bond in the main polymer and a thiol bond in the crosslinking agent, and the unsaturated bond is selected from an olefinic bond and/or an acetylenic bond.

16. An electrode plate, comprising:
a current collector; and
an active layer carried on the current collector and comprising the crosslinking resin according to claim 15 .

17. A battery, comprising the electrode plate according to claim 16 .

18. An electrical device, comprising the battery according to claim 17 .

Assignees

• Contemporary Amperex Technology Hong Kong Ltd

Inventors

• Hu Changyuan
• Lu Lei
• Wang yalong
• Wang Zheng

Classifications

• C08F236/06

  Butadiene · CPC title

• H01M4/622

  being polymers · CPC title

• H01M4/0404

  by coating on electrode collectors · CPC title

• C08K5/37

  Thiols · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title