Patent ID: 9365940
Filing Date: 2016-06-14
CPC Classification: C25C,C25D,H01M,Y02E

Claim Text:
1. A method for producing a porous copper foil, comprising the steps of: transferring a chromium-containing compound to a metal surface of a cathode, the transferring of the chromium-containing compound to the metal surface being achieved without applying voltage on the metal surface; rotating the cathode comprising the chromium containing compound into immediate contact with an electrolytic solution, the electrolytic solution comprising copper ions; depositing a copper foil on the cathode containing the chromium-containing compound by performing electrolysis of copper; and removing the copper foil from the metal surface of the cathode to obtain a porous copper foil having a difference in surface roughness Rz between the as deposited matte side and the as deposited shiny side of the copper foil in the range of 1.85-3.36 μm.