SK Nexilis Develops Carbon-Coated Copper Foil for Next-Generation Batteries
Improves Adhesion to Silicon Anode Materials to Prevent Electrode Delamination
Also Suitable for Dry Electrode Processes
Commercialization Targeted for the Second Half of 2027
SK Nexilis, the investment vehicle for SKC's copper foil business for secondary batteries, has developed copper foil for next-generation batteries that improves adhesion to silicon anode materials. The technology can extend battery life, improve safety, and be applied to dry electrode processes. Commercialization is targeted for the second half of 2027.
SK Nexilis said on October 20 that it had successfully developed “high-adhesion carbon-coated copper foil,” a technology that coats the surface of copper foil with a special carbon material.
The technology increases adhesion between copper foil and anode materials, helping suppress electrode delamination caused by the expansion of silicon anode materials. This is expected to improve the structural stability of electrodes and enhance battery life and safety.
Recently, the battery industry has been increasing the silicon content of anode materials to boost energy density. However, silicon expands in volume during charging and discharging, making it important to ensure strong adhesion between copper foil and anode materials.
The newly developed copper foil can also be used in dry electrode processes, which can reduce battery manufacturing costs and energy consumption. SK Nexilis said the material has strong potential for use in dry processes, where adhesion between electrode materials and copper foil is also important.
SK Nexilis is currently validating process stability and plans to secure mass-production technology after establishing a pilot production system. Commercialization is targeted for the second half of 2027.
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An SK Nexilis official said, “This achievement is a response to technological changes in the next-generation battery market, including the increased use of high-silicon-content anode materials and the adoption of dry electrode processes.” The official added, “We will strengthen our competitiveness in the next-generation battery materials market through commercialization optimization and ongoing technology development.”
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