Granted Patent B2

US 12,394,796 · App. 17/260,440 · Granted Aug 19, 2025

Inventors: Tomonori Kurata (Kawasaki, JP); Shuhei Maruta (Yokohama, JP); Kirida Kunanuruksapong (Himeji, JP); Mitsuru Hanasaki (Himeji, JP)

Assignee: Resonac Corporation

H01M4/622C08F290/062H01M4/13H01M10/0525H01M2004/027

Abstract

Claims (27)

1. A copolymer for a binder for a non-aqueous battery electrode, which is a copolymer (P) of a monomer mixture (M) comprising:

a monomer (A) represented by general formula (1);

a (meth)acrylic acid monomer (B); and

a monomer (C) represented by general formula (2),

wherein a content of a structure derived from the monomer (A) in the copolymer (P) is 0.5 to 20.0 mass %, a content of a structure derived from the (meth)acrylic acid monomer (B) in the copolymer (P) is 60.0 to 98.5 mass %, and a content of a structure derived from the monomer (C) in the copolymer (P) is 0.5 to 20.0 mass %,

wherein R 1 and R 2 each independently represent a hydrogen atom or an alkyl group having 1 to 5 carbon atoms,

wherein R 3 , R 4 , R 5 , and R 6 each independently represent a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and n is an integer of 1 or more, m is an integer of 0 or more, and (n+m)≥20.

2. The copolymer for a binder for a non-aqueous battery electrode according to claim 1 , wherein in the general formula (2), (n+m)≤500.

3. The copolymer for a binder for a non-aqueous battery electrode according to claim 1 , wherein in the general formula (2), (n+m)≥30.

4. The copolymer for a binder for a non-aqueous battery electrode according to claim 1 , wherein the monomer mixture (M) further comprises an ethylenically unsaturated monomer (D) having a polar functional group.

5. The copolymer for a binder for a non-aqueous battery electrode according to claim 1 , wherein the monomer (A) is N-vinylformamide or N-vinylacetamide.

6. The copolymer for a binder for a non-aqueous battery electrode according to claim 1 , wherein the weight-average molecular weight is in the range of 1,000,000 to 10,000,000.

7. The copolymer for a binder for a non-aqueous battery electrode according to claim 4 , wherein a content of a structure derived from the monomer (D) is 0.5 to 60.0 mass % in the copolymer (P).

8. A slurry for producing a non-aqueous battery electrode, the slurry comprising:

the copolymer for a binder for a non-aqueous battery electrode according to claim 1 ;

an electrode active material; and

an aqueous medium.

9. The slurry for producing a non-aqueous battery electrode according to claim 8 , wherein the electrode active material is a negative electrode active material.

10. The slurry for producing a non-aqueous battery electrode according to claim 8 , wherein a content of the copolymer (P) is 0.1 to 5.0 mass % with respect to total mass of the electrode active material and the copolymer (P).

11. A non-aqueous battery electrode, comprising:

a current collector; and

an electrode active material layer formed on a surface of the current collector,

wherein the electrode active material layer comprises

the copolymer for a binder for a non-aqueous battery electrode according to claim 1 , and

an electrode active material.

12. The non-aqueous battery electrode according to claim 11 , wherein the electrode active material is a negative electrode active material.

13. A non-aqueous battery comprising the non-aqueous battery electrode according to claim 11 .

Assignments (3)

Priority Claims (1)

Continuity (1)

References Cited (26)