SK Nexilis Develops High-Adhesion Carbon-Coated Copper Foil
A new copper foil technology has emerged that can suppress volume expansion and material delamination, chronic problems associated with silicon anode materials. SK Nexilis, SKC’s investment company for its secondary battery copper foil business, said on Oct. 20 that it had succeeded in developing “h
SK Nexilis, SKC's investment arm for its secondary battery copper foil business, has developed a novel copper foil technology that effectively combats volume expansion and delamination issues commonly found in silicon anode materials. The company announced on October 20 that it has successfully created a "high-adhesion carbon-coated copper foil" technology, which significantly enhances adhesion between the copper foil and anode materials by applying a unique carbon coating.
This innovation aligns with the industry's shift towards incorporating higher silicon content in anode materials to boost energy density, but it also exacerbates volume expansion during charging and discharging, leading to greater delamination risks.
To address these challenges, SK Nexilis strengthened the bond between the copper foil and anode materials, bolstering electrode structural stability. As a result, the battery's lifespan and safety are improved. The technology also proves compatible with the "dry electrode process," an emerging battery manufacturing method that promises significant cost and energy savings compared to the traditional wet process.
However, the dry process demands a reliable bonding method, and SK Nexilis believes its new high-adhesion technology could fill this gap, providing an alternative solution.
Construction of a pilot production system for large-scale manufacturing of the technology commenced. Currently, the company is verifying process stability and aims to finalize mass production technology for commercialization by late 2027. An SK Nexilis representative noted that this development is a proactive response to the fast-evolving next-generation battery market, underscoring the company's commitment to advancing technological competitiveness through continuous optimization efforts.
SK Nexilis maintains its focus on technology verification and efficiency improvements at its production facility in Jeongeup.
Written by urgent.news from BusinessKorea's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
