Ultra thin high conductivity gold-plated copper foil is an extremely thin copper strip or sheet with a thickness of less than 200 μ m processed from copper

    PET copper foilIt is a micrometer sized composite copper foil with a sandwich structure. PET copper foil is a composite copper foil with a sandwich structure of copper polymer copper composite. Firstly, PET (polyethylene terephthalate) polymer film is used as the substrate, and then a metal copper layer is deposited on the upper and lower surfaces of the PET film using advanced technology. According to the official website of Tengsheng Technology, the thickness of composite copper foil base material is generally 3-8 μ m. Then, a 30-70 nanometer metal layer is made on both sides of the base film, and the metal layer is thickened to 1 μ m or more by thickening. Therefore, the thickness of composite copper foil is generally 5-10 μ m, which can be used to replace 4.5-9 μ m electrolytic copper foil. PET copper foil is made of 4.5 μ m PET as the base film, and then coated with 1 μ m copper on each side of the base film, forming a 6.5 μ m PET copper foil.

This copper polymer copper composite structure was first applied to copper-clad laminates. Copper clad laminate is a composite material used in the field of electronic information, made of polymer resin, reinforced plastic, copper foil, filling materials, etc. The resin matrix, as the main component of copper-clad laminates, can significantly affect their performance. Common resin matrices include polyepoxide resin, polyphenylene ether, tetrafluoroethylene, bismaleimide, cyanate ester, epoxy resin, etc.The characteristics and quality of lithium copper foil are closely related to the performance of lithium batteries. Lithium batteries have high requirements for the physical, chemical, and surface properties of lithium copper foil. The physical properties include thickness, thickness uniformity, tensile strength, and elongation, while the chemical properties include oxidation resistance and corrosion resistance. The surface properties include surface roughness, surface quality, porosity, etc. The PET composite copper foil used for lithium battery current collectors has a relatively small thickness. The thickness of lithium battery copper foil is generally between 8-12 μ m, and the smaller the thickness, the higher the energy density of the lithium battery. In addition, thickness uniformity can affect battery capacity and consistency. The tensile strength and elongation will affect the yield, internal resistance, and cycle life of negative electrode production. In addition, a layer of oxide film will form on the surface of the copper foil, and the thickness of the oxide film will affect the internal resistance and capacity of the battery. The thicker the oxide film, the higher the internal resistance and lower the capacity of the battery.