OCSiAl, a Luxembourg-headquartered supplier of single-wall carbon nanotubes, has been named a supplier to PowerCo, Volkswagen's battery manufacturing subsidiary, for its Unified Cell battery platform. The nanotubes, sold under the TUBALL brand, are added to graphite anodes to boost electrical conductivity and heat dissipation, allowing cells to handle higher charge and discharge currents without overheating. OCSiAl says the additives improve energy density, fast-charging performance, and cycle life in both cathode and anode systems. The nanotubes for PowerCo will come from OCSiAl's production facility in Serbia, which the company says increases local sourcing of critical battery materials within Europe. The site has passed audits by PowerCo and other European and Asian battery manufacturers. OCSiAl says batteries containing its nanotubes already power about one million EVs worldwide, and it is evaluating further European capacity expansion to meet demand from next-generation EV battery platforms. In November 2025, OCSiAl announced a $300-million graphene nanotube facility in Luxembourg. The company expects demand from next-generation EV battery platforms to accelerate, driving the need for more production capacity within Europe.
