Effect of Ce(SO4)2 Additives on The Structure and Performance of Ultra-Thin Electrolytic Copper Foil
In order to improve the mechanical properties of ultrathin electrolytic copper foil,the effects of Ce(SO4)2 with different mass concentrations in the electrolyte on the structure and mechanical properties of ultrathin electrolytic copper foil were studied.The results show that,when Ce(SO4)2 mass concentration was 15 mg/L,the tensile strength of the prepared electrolytic copper foil is as high as 457 MPa,which is increased by 16％,and the elongation is increased to 5.23％and 78％.This is because the addition of Ce(SO4)2 increases the overpotential of copper electrodeposition,accelerates the diffusion rate of copper ions on the surface of the cathode,and Ce4+provides active sites for the deposition of Cu2+,which leads to the generation of a large number of copper nuclei,inhibits the growth of copper crystals,refines the size of copper grains,and the addition of Ce(SO4)2 improves the morphology and structure of the ultra-thin electrolytic copper foils as well as enhances their mechanical properties.
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