Conductive material dispersion, secondary battery electrode composition using same, electrode film, and secondary battery

Abstract

Provided is a conductive material dispersion containing: a conductive material; a polymer including aliphatic hydrocarbon structural units and nitrile group-containing structural units; and a dispersion medium, the conductive material being at least one selected from a group consisting of carbon nanotubes and acetylene black. The Mooney viscosity (ML1+4 at 100° C.) of the polymer is 20-80 inclusive. The aliphatic hydrocarbon structural units include alkylene structural units, and the content of the aliphatic hydrocarbon structural units relative to the mass of the polymer is at least 40 mass % but less than 85 mass %. The content of the nitrile group-containing structural units relative to the mass of the polymer is 15-50 mass % inclusive. The product (X×Y) of the complex elastic modulus X (Pa) and the phase angle Y (°) of the conductive material dispersion according to dynamic viscoelasticity measurement is 30-1,700 inclusive.

Dependencies are inferred from the claim text.