NOVELTY - A polar dispersion liquid composition is obtained by dispersing electroconductive carbon black in polar dispersion medium containing non-ionic dispersing agent. The carbon black has dibutylphthalate oil absorption amount of 300-600 ml/100 g. The non-ionic dispersing agent is copolymer having aromatic vinyl monomer unit (a) and ethylene oxide addition product of (meth)acrylic acid alkylester (b) in the molar ratio of 5/95-95/5. The copolymer has weight average molecular weight of 1000-1000000. The copolymer has clouding point of 30 degrees C or more in the polar dispersion medium.    USE - Polar dispersion liquid composition used for manufacturing coated article e.g. secondary battery (both claimed).    ADVANTAGE - The polar dispersion liquid composition has high dispersibility, low viscosity, excellent handleability and forms coating film having excellent electroconductivity.    DETAILED DESCRIPTION - A polar dispersion liquid composition is obtained by dispersing electroconductive carbon black in polar dispersion medium containing non-ionic dispersing agent. The carbon black has dibutylphthalate oil absorption amount of 300-600 ml/100 g. The non-ionic dispersing agent is copolymer having aromatic vinyl monomer unit (a) and ethylene oxide addition product of (meth)acrylic acid alkylester in the molar ratio of 5/95-95/5. The copolymer has weight average molecular weight of 1000-1000000. The copolymer has clouding point of 30 degrees C or more in the polar dispersion medium, and is below the standard boiling point of the medium. The composition contains 0.5-30 parts mass of the electroconductive carbon black and 0.1-30 parts mass of nonionic dispersing agent with respect to 100 parts mass of the composition. The ethylene oxide addition product of (meth)acrylic acid alkylester is of formula: H2C=C(-R1)-C(=O)-O-(C2H4O)n-R2 (I).    R1=H or methyl;    R2=1-30C optionally saturated, optionally branched aliphatic hydrocarbyl;and    n=5-50.    An INDEPENDENT CLAIM is included for manufacture of coated article, which involves mixing the polar dispersion liquid composition and binder resin, applying the coating liquid obtained on a to-be-coated article, and drying the coated article to form a coating film at temperature higher than the clouding point of the nonionic dispersing agent.