Electrode collector for battery and use thereof

摘要

The electrode collector 40 for a battery provided by the present invention is an electrode collector 40 having a base 10 that mainly composed of a conductive metal such as aluminum, and a DLC film 20 covering the surface 12 of the base 10. The DLC film 20 is not thicker than 10 nm, and preferably has a hydrophilic surface on which hydrophilic functional groups are present.

主权项

1. A method for producing a positive electrode for a lithium secondary battery, comprising:
preparing a base mainly composed of a conductive metal; forming a diamond-like carbon film not thicker than 10 nm and not thinner than 0.8 on the surface of the prepared base; hydrophilizing a surface of the diamond-like carbon film by introducing hydrophilic functional groups to the surface of the formed diamond-like carbon film in an atmosphere including a nitrogen source gas to obtain a hydrophilic surface; preparing an aqueous composition for forming a positive electrode mix layer, wherein the aqueous composition contains a lithium transition metal compound oxide to function as a positive electrode active material and an aqueous dispersion medium; and applying the aqueous composition onto the hydrophilic surface of the diamond-like carbon film and drying the aqueous composition at 70 to 200° C. to remove the aqueous dispersion medium in the aqueous composition for forming the positive electrode mix layer, wherein the removal of the aqueous dispersion medium from the aqueous composition results in the formation of the positive electrode mix layer.