Dispersant composition for electrochemical device, conductive material dispersion liquid for electrochemical device, slurry composition for electrochemical device electrode and method of producing same, electrode for electrochemical device, and electrochemical device

A dispersant composition for an electrochemical device comprising a polymer including a nitrile group-containing monomer unit and an alkylene structural unit, wherein

• the alkylene structural unit is a repeating unit represented by a general formula:
• —CnH2n— (n is an integer of 2 or more),
• upon measurement of the polymer by dynamic light scattering, a value (A) detected for volume-average particle diameter D50 is not less than 50 nm and not more than 450 nm, and one or more peaks are detected in a particle diameter range of not less than 5 μm and not more than 30 μm, wherein the one or more peaks detected in the range of not less than 5 μm and not more than 30 μm corresponds to size of clusters formed by a plurality of polymer molecules, and
• when a value for a particle diameter corresponding to a largest peak among the one or more peaks that are detected in the particle diameter range of not less than 5 μm and not more than 30 μm upon measurement of the polymer by dynamic light scattering is taken to be (B),
• a parameter (B/A) that is obtained by dividing the value (B) for the particle diameter by the value (A) for the volume-average particle diameter D50 has a value of not less than 7 and not more than 200, and
• an iodine value of the polymer is 50 mg/100 mg or less.