Copper foil is a key conductive material in lithium-ion batteries and printed circuit boards. However, the purity of the copper foil is critical to the quality of the circuit board. To ensure high-quality copper foil production, electrolyte purification is an essential process. In this process, activated carbon has proven to be an efficient and reliable purification agent. This article will explore in detail the key role and impact of activated carbon in the purification of copper foil electrolyte.
What is electrolytic copper foil solution?
The production of electrolytic copper foil is to deposit copper ions on the cathode through electrodeposition from a copper sulfate aqueous solution to form copper foil. In order to obtain ideal electrolytic copper foil, the quality of the electrolyte is crucial. The electrolyte must be very clean, and the maximum allowable content of inorganic impurities is: zinc <1.0g/L, iron <1.5 g/L, antimony <0.15 g/L, lead <0.1 g/L, nickel <0.1 g/L, cadmium <0.1 g/L, chromium <0.3 g/L. The content of non-copper inorganic metal ions in the electrolyte must be within the allowable range, and the lower the better, and the lower the content of non-sulfate anions the better.