Patent ID: 8388922

Claim:
A method for producing a composition for forming a negative electrode material for a lithium battery, comprising adding an aqueous styrene-butadiene rubber dispersion to a carbon fiber/active substance dispersion prepared by dispersing, in an aqueous thickener solution, a carbon fiber having a fiber diameter of 1 to 1,000 nm, a carbonaceous negative electrode active substance having a specific surface area of 1 m 2 /g or more; and stifling the resultant mixture, wherein the carbon fiber/active substance dispersion is prepared by (1) dispersing a carbon fiber having a fiber diameter of 1 to 1,000 nm in an aqueous thickener solution under stifling; and by adding thereto a carbonaceous negative electrode active substance having a specific surface area of 1 m 2 /g or more followed by mixing with stirring, or (2) adding, to an aqueous thickener solution, a carbonaceous negative electrode active substance having a specific surface area of 1 m 2 /g or more followed by mixing with stirring; and by dispersing a carbon fiber having a fiber diameter of 1 to 1,000 nm in the resultant mixture under stirring.