Patent ID: 7901738

Claim:
A method for forming an electrode for a battery, said method comprising the steps of: preparing an electrode hoop formed at its surface with a mixture layer containing an active material and forming a porous layer on the surface of the electrode hoop, the step of forming the porous layer comprising the steps of: rotating a gravure roll oppositely to the direction of movement of the electrode hoop while allowing the gravure roll to abut against the surface of the moving electrode hoop, thereby applying a coating fluid serving as a precursor of the porous layer to the surface of the electrode hoop, the circumferential surface of the gravure roll being formed with a plurality of grooves, and drying the coating fluid applied to the surface of the electrode hoop, the grooves extending in parallel in oblique directions against the direction of rotation of the gravure roll from a generally central line of the circumferential surface to the outer edges of the circumferential surface so as to be arranged in a symmetrical manner relative to the generally central line.