Current collector for electrical storage device, method for producing the same, and coating liquid used in said production method

A coating liquid for producing a current collector for electrical storage device, comprising a powdery carbon material, acid-modified polyvinylidene fluoride, polyvinylpyrrolidone and a solvent,

• the total content of the powdery carbon material, the acid-modified polyvinylidene fluoride and the polyvinylpyrrolidone being 2 to 20 mass % of the coating liquid,
• the ratio of the powdery carbon material to the acid-modified polyvinylidene fluoride (mass of powdery carbon material:mass of acid-modified polyvinylidene fluoride) being 20:80 to 40:60,
• the content of the polyvinylpyrrolidone being 0.099 to 5.0 parts by mass per 100 parts by mass of the total of the powdery carbon material and the acid-modified polyvinylidene fluoride,
• the solvent comprising N-methyl-2-pyrrolidone.

A method for producing a current collector for electrical storage device, comprising:

• a step of preparing a coating liquid comprising a powdery carbon material, acid-modified polyvinylidene fluoride, polyvinylpyrrolidone and a solvent,
• a step of applying the coating liquid to one or both sides of a sheet-shaped conductive substrate, and
• a step of drying the coating liquid applied,
• the total content of the powdery carbon material, the acid-modified polyvinylidene fluoride and the polyvinylpyrrolidone being 2 to 20 mass % of the coating liquid,
• the ratio of the powdery carbon material to the acid-modified polyvinylidene fluoride (mass of powdery carbon material:mass of acid-modified polyvinylidene fluoride) being 20:80 to 40:60,
• the content of the polyvinylpyrrolidone being 0.099 to 5.0 parts by mass per 100 parts by mass of the total of the powdery carbon material and the acid-modified polyvinylidene fluoride,
• the solvent comprising N-methyl-2-pyrrolidone.