ELECTRODE AND SECONDARY BATTERY USING IT

摘要

PROBLEM TO BE SOLVED: To improve the adhesiveness between an electrode active material and a current collector by forming the binder of an electrode constituting material layer with an acrylic copolymer having the carboxylic acid group and a polyvinylidene fluoride resin. SOLUTION: An electrode constituting material layer constituted of at least an electrode active material and a binder is formed on the surface of the current collector of a battery electrode. The binder of the electrode is formed with a polyvinylidene fluoride resin and an acrylic copolymer constituted of a monomer of 0.5-20 pts.wt. having the carboxylic acid group or the carboxylic acid anhydride group and at least one kind of monomer of 100 pts.wt. selected from ester acrylic acid and ester methacrylic acid. The percentage of the content of the acrylic copolymer is set to 0.5-20wt.% of the binder. The electrode having strong adhesive strength between the electrode active material and the current collector is obtained. This electrode is useful for a lithium secondary battery.