Abstract: A conductive material dispersion containing a dispersant that satisfies the following (1) and (2), a carbon-based conductive material (C), and a medium (D) containing at least water. (1) Contains a polymer (A) having one or more selected from the group consisting of nitrile group-containing structural units, carboxyl group-containing structural units, hydroxyl group-containing structural units, and heterocycle-containing structural units and having a weight average molecular weight of 5,000 or more and 360,000 or less. (2) Contains a component (B) other than a polymer and derived from the raw materials of the polymer (A); and the content of the component (B) is 2 mass % or less based on the total mass of the dispersant.

Abstract: Provided is a dispersant containing a copolymer that includes an aliphatic hydrocarbon structural unit, a nitrile group-containing structural unit, and a substituted or unsubstituted carbamoyl group-containing structural unit. The aliphatic hydrocarbon structural unit includes an alkylene structural unit. The content of the aliphatic hydrocarbon structural unit is 40 mass % or more and less than 85 mass % based on the mass of the copolymer, the content of the nitrile group-containing structural unit is 15 mass % or more and 50 mass % or less based on the mass of the copolymer, and the content of the substituted or unsubstituted carbamoyl group-containing structural unit is 10 mass % or less based on the mass of the copolymer. The weight-average molecular weight of the polymer is 5,000 or more and 400,000 or less.

Abstract: Provided is a dispersant containing a copolymer that includes an aliphatic hydrocarbon structural unit, a nitrile group-containing structural unit, and a substituted or unsubstituted carbamoyl group-containing structural unit. The aliphatic hydrocarbon structural unit includes an alkylene structural unit. The content of the aliphatic hydrocarbon structural unit is 40 mass % or more and less than 85 mass % based on the mass of the copolymer, the content of the nitrile group-containing structural unit is 15 mass % or more and 50 mass % or less based on the mass of the copolymer, and the content of the substituted or unsubstituted carbamoyl group-containing structural unit is 10 mass % or less based on the mass of the copolymer. The weight-average molecular weight of the polymer is 5,000 or more and 400,000 or less.

Abstract: Provided is a conductive material dispersion including: a conductive material containing at least one kind selected from the group consisting of a carbon nanotube and carbon black; carboxymethyl cellulose or its salt; and water. The carboxymethyl cellulose or its salt has a weight average molecular weight of 10,000 to 150,000 and an etherification degree of 0.5 to 0.9. A product of the complex elastic modulus (Pa) and the phase angle (°) of the conductive material dispersion is 100 or more and 1,500 or less.

Abstract: A carbon nanotube dispersion liquid for nonaqueous electrolyte secondary battery is a carbon nanotube dispersion liquid containing carbon nanotubes, a dispersant and a solvent, and is characterized in satisfying (1) to (3) below: (1) the average outer diameter of the carbon nanotubes ranging from more than 3 nm to 25 nm; (2) the BET surface area of the carbon nanotubes ranging from 150 m2/g to 800 m2/g; and (3) the fiber length of the carbon nanotubes in the carbon nanotube dispersion liquid ranging from 0.8 ?m to 3.5 ?m.

Abstract: The present invention addresses the problem of providing: a dispersant which enables the production of a dispersed material having excellent dispersibility and storage stability even when the dispersant is used in a small amount; a dispersed material having excellent dispersibility and storage stability; an electrode film having excellent adhesiveness and electrical conductivity; and a non-aqueous electrolyte secondary battery having excellent rate properties and cycle properties. The problem can be solved by a dispersant which is a polymer containing 40 to 100% by mass of a (meth)acrylonitrile-derived unit and having a weight average molecular weight of 5,000 to 400,000.

Abstract: Provided are: a dispersant which has good dispersibility and reduces electronic resistance; and a battery having excellent characteristics, which uses this dispersant and is decreased in the ionic resistance and the reaction resistance. A dispersant contains a triazine derivative represented by general formula (1), and an amine or an inorganic base (in general formula (1), R1 is as defined in the description).

Abstract: Provided are: a dispersant which has good dispersibility and reduces electronic resistance; and a battery having excellent characteristics, which uses this dispersant and is decreased in the ionic resistance and the reaction resistance. A dispersant contains a triazine derivative represented by general formula (1), and an amine or an inorganic base (in general formula (1), R1 is as defined in the description).