PAINT FOR ADHESIVE LAYER AS WELL AS ELECTRODE FOR SECONDARY BATTERY AND SECONDARY BATTERY USING THEM

摘要

PROBLEM TO BE SOLVED: To improve adhesiveness and conductivity between a collector and an active material layer and improve cycle capacity maintenance characteristics.

SOLUTION: With the electrode for a secondary battery, active material layers 13, 17 are fitted on one side or both sides of collectors 12, 16 with adhesive layers 19, 21 having a polymer binder interposed in between. A part of the polymer binder exists in the adhesive layers 19, 21 in a state of particles, and that particulate polymer binder has an average volume particle diameter of 1 to 100 μm. A main ingredient of the polymer binder is either fluorocarbon resin or a compound graft polymerized on polyvinylidene fluoride with either acrylic or methacrylic acid as a monomer. An area density of the particulate polymer binder in the adhesive layers 19, 21 at cross section parallel with the surface of the adhesive layers 19, 21 is 1 to 100 pieces per cm2. With the use of the electrodes 11, 14 for the secondary battery is obtained a secondary battery.

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