Patent ID: 8685362

Claim:
A carbon fiber-containing composition, comprising a vapor grown carbon fiber and an aqueous solution of a thickening agent, wherein the vapor grown carbon fiber has an average fiber diameter of 1 to 200 nm with a hollow structure inside the fiber and a structure where graphene sheets are laminated vertically against the length direction of the fiber, wherein d(002), a planar spacing between (002) faces, is from 0.336 to 0.345 nm in the graphite structure as measured by powder X-ray diffraction method, wherein the vapor grown carbon fiber is dispersed in the aqueous solution of thickening agent, wherein the viscosity of the carbon fiber-containing composition at 25Â° C. is 5000 mPaÂ·sec or lower, and wherein the concentration of the vapor grown carbon fiber in the composition is within a range of 1 to 20 mass % and the solid concentration of the aqueous solution of thickening agent is within a range of 0.3 to 3.0 mass %.