| abstract |
Disclosed is a carbon black dispersion using N-methyl-2-pyrrolidone as a solvent, which is superior in dispersibility and storage stability at a low viscosity and high concentration as compared with conventional resin-type dispersants. The present invention also provides a battery electrode mixture layer having a uniform and good coating film property and low surface resistance, and a lithium ion secondary battery comprising the same. [Solution] A carbon black dispersion comprising carbon black, a polyvinyl alcohol resin as a dispersant, and N-methyl-2-pyrrolidone as a solvent, wherein the saponification degree of the polyvinyl alcohol resin is 60 to 85 mol%. In the case where the BET specific surface area of carbon black is Xm 2 / g and the amount of polyvinyl alcohol resin added to 1 g of carbon black is aXg, a is in the range of 0.00017 ≦ a ≦ 0.00256, polyvinyl alcohol resin is 2 parts by weight or more with respect to parts, der Ru carbon black dispersion than 8 parts by weight. [Selection figure] None |