ELECTRODE FILM FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

PROBLEM TO BE SOLVED: To provide an electrode film for nonaqueous electrolyte secondary batteries which has high adhesion strength to an electric collector and excellent bending property by using a soft type fluoro-resin produced by graft- polymerizing fluorine-containing elastic copolymer to a specified extent as a binder. SOLUTION: In an electrode film for nonaqueous electrolyte secondary battery, one or more kinds of fluorine-containing monomer and a monomer having a double bond and peroxy-bond together in a molecule are copolymerized to produce a skeleton polymer of a fluorine-containing elastic polymer body with glass transition temperature not higher than a room temperature for a binder. As a binder, a soft type fluoro-resin produced by graft-polymerizing 100 pts.wt. of the skeleton polymer with 40-70 pts.wt. of vinylidene fluoride monomer is used. Consequently, high adhesion strength to an electric collector and excellent bending property can be provided and cracking and parting of an active material layer at the time of treating electrodes can be suppressed.