SECONDARY BATTERY-USE POLE PLATE MATERIAL

An electrode sheet material for use in secondary batteries is provided. According to the present invention, battery properties can be improved and its economy is excellent. Punching is carried out on steel or copper sheet (foil), and after nickel plating, press-forming to form projections on the surface, e.g., embossing is carried out so that a three-dimensional structure is prepared. Optionally, broken-through portions may be provided in the foot portion.