| 摘要 |
A chargeable and dischargeable secondary battery for use in electronic devices, industrial machines, electric-powered vehicles, is provided, along with an anodic electrode and a copper foil for anode current collector. It is an anode for secondary battery that utilizes non-aqueous electrolyte, which comprises a silicon-type active material film formed on one side or both sides of a current collector made of copper foil or copper alloy foil, wherein 1 g/m2 to 14 g/m2 of silicon-type active material film is formed on said current collector, and the lightness Y value in a XYZ colorimetric system (CIE 1931 standard colorimetric system) for the surface of said anode, onto which said silicon-type active material film is formed, is 15 to 50, and the surface roughness (ten point average roughness) Rz specified by the Japanese Industrial Standards (JIS B0601-1994 ten point average roughness) is 1.0 μm or more and 4.5 μm or less. |
