Manufacturing method of composite copper foil

Abstract

A manufacturing method of composite copper foil includes the following steps: providing a copper foil, wherein the copper foil has a first surface and a second surface opposite to each other; performing a surface treatment with a surface treatment solution to form a first surface treatment layer on the first surface of the copper foil; and forming a first lithium metal layer on the first surface treatment layer. Another manufacturing method of composite copper foil includes the following steps: providing a copper foil, wherein the copper foil has a first surface and a second surface opposite to each other; preparing a conductive material; adding a filling material, an adhesive material and a solvent to the conductive material to form a slurry; coating the slurry on the first surface of the copper foil to form a first conductive layer.

Dependencies are inferred from the claim text.