CONDUCTIVE-BINDED COMPOSITION FOR SECONDARY BATTERY ELECTRODE AND MANUFACTURE THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a conductive-binded composition with which electrodes having properties scarcely changed during the use of batteries or a reserved period can be produced by blending conductive carbon and an aqueous dispersing agent with a specified styrene-butadiene copolymer latex denatured by specified carboxylation. SOLUTION: This composition consists of 100 pts.wt. of styrene-butadiene copolymer latex denatured by carboxylation containing 30-98wt.% of bound butadiene content and 20-95wt.% of gel, 10-200 pts.wt. of conductive carbon, 0.1-100 pts.wt. of an aqueous dispersing agent. It is preferable to produce the composition that the conductive carbon in 50wt.% (based on solid matter) of the total conductive carbon or more is added at first to the aqueous dispersing agent in 50wt.% of the total aqueous dispersing agent and finely dispersed by a mixing apparatus having high shearing force, and that the rest of the aqueous dispersing agent, the rest of the conductive carbon, and styrene- butadiene copolymer latex denatured by carboxylation are then mixed. Normally about 0.1-30 pts.wt. (based on a solid matter of the composition) of the composition is used for 100 pts.wt. of an anode active material.