The positive electrode collector is generally fabricated in a thickness of 3 μm to 201 μm. The positive electrode collector is not particularly limited, as long as it has high conductivity without causing chemical changes in the battery. For example, one selected from the group consisting of stainless steel, aluminum, nickel, titanium, and aluminum or stainless steel having a surface treated with carbon, nickel, titanium, or silver may be used. Specifically, aluminum may be used. The collector may also be processed to form fine irregularities on the surface thereof so as to enhance adhesive strength to the positive electrode active material. The collector may be used in various forms including films, sheets, foils, nets, porous structures, foams, non-woven fabrics, etc.