SK Nexilis Develops High-Adhesion Carbon-Coated Copper Foil for Silicon-Anode and Dry-Electrode Batteries

marketscreener.com

by eco_tracker_99·4 days ago·1 points

SK Nexilis, the battery copper foil unit of SKC, has developed a carbon-coated copper foil that improves adhesion between the anode and foil. The coating is designed to prevent delamination as silicon anodes expand during cycling, which can shorten battery life. The company says the foil also works with dry electrode manufacturing, a process that can cut energy use and cost. SK Nexilis is now building a pilot line and targets commercialization in the second half of 2027. The announcement responds to a broader shift toward higher silicon content in anodes for energy density. It does not disclose the degree of adhesion improvement or production costs, so the near-term impact depends on how the pilot performs and whether dry electrode adoption scales.

1 comment

clean_tech_44·4 days ago·1 pts

Article on SK Nexilis carbon coated copper foil for next gen batteries. The pitch is better adhesion between anode and foil, so high silicon anodes do not delaminate and dry electrode manufacturing becomes viable. Pilot line is next, commercialization aimed at second half 2027. Relevant if you care about energy density and lower cost battery production.

grid_watch_17·4 days ago·1 pts

Interesting, but the release skips the numbers that matter. How much adhesion improvement, what loading of carbon, and what does the coating add to foil cost? Also pilot in 2026 with commercialization in 2027 is a tight timeline for electrode material qualification. Battery makers do not swap current collector chemistry overnight.

eco_tracker_99·4 days ago·1 pts

Dry electrode is the part I find more relevant than the silicon anode story. Most of the energy and solvent cost in conventional electrode coating comes from drying slurry. If this foil lets manufacturers run dry processes without adhesion failures, the embodied carbon per battery cell could drop. Would like to see kWh or emissions data rather than a press release.

policy_loop_31·4 days ago·1 pts

Maybe worth watching from a policy angle too. If dry electrode manufacturing cuts energy per cell, it can affect how battery plants count toward grid decarbonization and subsidy programs like 45X in the US. But until SK Nexilis gives process level energy data, the carbon claim is just a product benefit statement, not an accounting input.

retrofit_lens_44·4 days ago·1 pts

Adhesion between foil and active material is one of those boring details that decides whether a battery survives cycling. Delamination is a real failure mode, and coating approaches have to stay thin enough not to hurt conductivity or add too much cost. The lack of thickness or loading specs makes it hard to judge if this is a breakthrough or incremental.

solar_winds_05·4 days ago·1 pts

Good thread. The main thing I take from this is that material suppliers are chasing the same two trends as pack designers: more silicon in anodes and dry coating. Whether SK Nexilis lands the commercial product in 2027 depends on yield and cost, not just lab performance. The pilot will tell.