Binder composition for secondary battery electrode, conductive material paste composition for secondary battery electrode, slurry composition for secondary battery electrode, electrode for secondary battery, and secondary battery
Provided are a binder composition for a secondary battery electrode that enables favorable dispersion of a conductive material when used in production of a slurry composition for a secondary battery electrode, and a slurry composition for a secondary battery electrode in which a conductive material is favorably dispersed. The binder composition for a secondary battery electrode contains a solvent and a copolymer including an alkylene structural unit and a nitrile group-containing monomer unit. The copolymer has a Mooney viscosity (ML 1+4 , 100° C.) of 40 or less. The slurry composition for a secondary battery electrode contains an electrode active material, a conductive material, the aforementioned binder composition for a secondary battery electrode, and a polymer other than the aforementioned copolymer.
1. A binder composition for a secondary battery electrode comprising:
a copolymer including an alkylene structural unit and a nitrile group-containing monomer unit; and
a solvent, wherein
the copolymer has a Mooney viscosity (ML 1+4 , 100° C.) of 40 or less.
2. The binder composition for a secondary battery electrode according to claim 1 , wherein
the copolymer includes the alkylene structural unit in a proportion of at least 40 mass % and not more than 80 mass %.
3. The binder composition for a secondary battery electrode according to claim 1 , wherein
the copolymer includes the nitrile group-containing monomer unit in a proportion of at least 10 mass % and not more than 55 mass %.
4. The binder composition for a secondary battery electrode according to claim 1 , wherein
the copolymer does not substantially include a hydrophilic group-containing monomer unit.
5. A conductive material paste composition for a secondary battery electrode comprising:
the binder composition for a secondary battery electrode according to claim 1 ; and
a conductive material.
6. The conductive material paste composition for a secondary battery electrode according to claim 5 , wherein
the conductive material has a BET specific surface area of at least 100 m 2 /g and not more than 2,500 m 2 /g.
7. A slurry composition for a secondary battery electrode comprising:
an electrode active material;
a conductive material;
the binder composition for a secondary battery electrode according to claim 1 ; and
a polymer other than the copolymer.
8. The slurry composition for a secondary battery electrode according to claim 7 , wherein
the conductive material has a BET specific surface area of at least 100 m 2 /g and not more than 2,500 m 2 /g.
9. An electrode for a secondary battery comprising an electrode mixed material layer formed using the slurry composition for a secondary battery electrode according to claim 7 .
10. A secondary battery comprising the electrode for a secondary battery according to claim 9 .