OCSiAl’s agreement to supply single-wall carbon nanotubes to PowerCo’s Salzgitter battery-cell facility looks, at first glance, like a specialist materials contract. In reality, it points to something larger: Europe’s battery industry is moving beyond the headline race for gigafactories and into the more difficult industrial layer where cell performance, materials localisation, process stability and supply-chain resilience decide who can compete with Asia at scale.
The deal places OCSiAl’s TUBALL™ single-wall carbon nanotubes inside the supply chain of PowerCo, Volkswagen Group’s battery company, at a moment when Salzgitter is becoming one of Europe’s most important battery platforms. PowerCo has already started production of its Unified Cell in Germany, with initial capacity planned at 20 GWh and expansion potential to 40 GWh. For Volkswagen, Salzgitter is not only a factory. It is the reference site for a standardised battery-production model that is expected to support future plants in Spain and Canada.
That makes the choice of materials suppliers strategically important. Battery competitiveness is no longer defined only by cathode chemistry, lithium sourcing or pack design. The smaller components inside the electrode system are becoming increasingly important because they influence charging speed, cycle life, internal resistance, energy density, safety and production yield. Conductive additives are one of those areas. They do not attract the same public attention as lithium, nickel or graphite, but they can materially affect how a cell performs under real automotive conditions.
Single-wall carbon nanotubes are used to create a conductive and mechanically resilient network inside the electrode. In simple terms, they help keep active material particles electrically connected during charging and discharging. That matters especially as battery makers push toward higher-performance chemistries, thicker electrodes, silicon-rich anodes, fast-charging formats and lower-cost production processes. As the industry tries to extract more performance from each cell, the role of advanced additives becomes less marginal and more strategic.
For PowerCo, the logic is straightforward. Volkswagen needs cells that can be produced at scale, with predictable quality, competitive cost and performance strong enough for its next generation of electric vehicles. The company’s Unified Cell strategy is designed to reduce complexity across brands and platforms, while allowing different chemistries such as NMC, LFP and potentially future solid-state formats. In that architecture, suppliers of critical enabling materials become part of the industrial control system. They are not just vendors; they are contributors to the performance envelope of the platform.
For OCSiAl, the deal is a validation of its effort to industrialise single-wall carbon nanotubes as a mainstream battery material rather than a laboratory-grade specialty product. The company has spent years positioning TUBALL as an additive for batteries, polymers, elastomers, coatings and other advanced materials. Its key commercial argument is that nanotubes can deliver conductivity and reinforcement at very low loading levels, allowing manufacturers to improve material properties without significantly increasing weight or compromising other design parameters.
The Serbia angle is particularly important. OCSiAl completed a facility in Serbia for single-wall carbon nanotube water-based dispersions with stated annual capacity of 3,000 MT. The plant was designed to support high-performance battery manufacturing and to serve European customers with a more localised supply chain. In the context of the PowerCo agreement, that facility gives Serbia a direct role in Europe’s electric-vehicle industrial base. Serbia is not producing finished battery cells for Volkswagen, but it is supplying an advanced material used inside the cell-manufacturing chain.
That distinction matters for regional industrial policy. The Western Balkans often discuss the battery economy through lithium deposits, mining permits or potential cell factories. The OCSiAl case shows a different route into the value chain: specialty materials, dispersions, process know-how and supplier qualification. These segments may not have the political visibility of mining or gigafactory announcements, but they can be more realistic entry points for smaller economies with industrial land, lower operating costs and proximity to EU manufacturing hubs.
Serbia’s position is therefore more subtle than a raw-material story. Through OCSiAl’s production footprint, the country becomes linked to the performance materials layer of the European battery system. That creates a different kind of opportunity. Rather than being viewed only as a location for extraction or low-cost assembly, Serbia can position itself as a manufacturing base for specialised inputs that feed directly into EU automotive platforms. For investors, this is a more bankable and less politically exposed segment than mining, because it depends on industrial quality, customer certification and repeat supply rather than on long permitting battles around resource development.
The timing is also favourable. Europe’s battery industry has had a difficult period, with some projects delayed, restructured or pressured by weaker EV demand growth, high energy costs and Asian price competition. Yet the underlying strategic direction has not changed. European carmakers still need local cell supply, cleaner battery production, traceable materials and lower dependence on Asian suppliers. The EU Battery Regulation and the Critical Raw Materials Act are pushing the market toward more transparent, sustainable and regionally resilient supply chains. In that environment, a locally produced advanced additive used by a major European cell platform carries more strategic value than its physical volume would suggest.
PowerCo’s Salzgitter plant is especially relevant because it is part of Volkswagen’s attempt to bring a critical technology back under closer corporate control. The site is positioned as a European battery hub, combining cell production, research and development, skills transition and industrial process standardisation. Volkswagen has presented the plant as a way to strengthen technological sovereignty, reduce dependence on external cell suppliers and create a battery platform that can be replicated across geographies. OCSiAl’s supply role fits directly into that model: reliable access to advanced materials is part of the sovereignty equation.
The performance side of the deal should not be underestimated. Fast charging, longer battery life and safer cells are not marketing claims detached from materials engineering. When cells are charged quickly, electrodes experience higher stress. Silicon-rich anodes can expand and contract significantly during cycling. Thick electrodes can suffer from conductivity and transport limitations. Conductive networks based on nanotubes can help address these problems by improving electrical continuity and mechanical stability inside the electrode. For carmakers, that translates into a practical objective: more range, faster charging and longer warranty confidence without sacrificing manufacturability.
There is also a cost dimension. Battery cost reduction is no longer only about cheaper raw materials. It is about reducing scrap rates, improving process yields, extending cell life, simplifying pack architecture and enabling higher energy density per unit of production capacity. A better electrode additive can support that equation if it improves performance at low concentration and helps stabilise production. In gigafactory economics, small improvements at cell level can become material when multiplied across millions of cells.
The supply-chain reading is equally important. Europe’s battery strategy has often focused on cathode-active materials, lithium refining, nickel, cobalt and graphite. But the ecosystem also needs binders, additives, electrolytes, separators, coatings, foils, testing systems, process equipment and recycling channels. A weak link in any of these areas can slow industrial ramp-up. OCSiAl’s PowerCo agreement shows that Europe’s battery localisation effort is becoming more granular. It is no longer only about building factories; it is about filling the material and process layers around those factories.
For Serbia and the wider Southeast European region, this is the more interesting strategic lesson. The region does not need to win every segment of the battery value chain to become relevant. It can become relevant through specific industrial niches where cost structure, logistics, skills and customer proximity are competitive. Advanced material dispersions, battery testing services, electrical components, recycling pre-processing, grid-storage integration, technical certification and supplier engineering are all possible routes into the European battery economy.
The challenge is that these opportunities require discipline. Supplying a company such as PowerCo is not a commodity transaction. It requires stable quality, repeatable batches, documentation, environmental controls, product safety compliance and integration into the customer’s qualification process. Once a material enters an automotive battery platform, the supplier relationship becomes technically embedded. That can create durable revenue, but only if the supplier can maintain exacting standards over time.
OCSiAl’s Serbia facility therefore carries implications beyond one contract. It demonstrates that high-value battery materials can be produced in the region if the investment is tied to global customers and industrial-grade processes. It also raises the bar for what Southeast Europe should consider “battery industry participation.” The real value is not in announcing broad ambitions, but in securing qualified positions inside European automotive supply chains.
For Volkswagen and PowerCo, the partnership supports the wider European goal of building cell-production capability close to vehicle manufacturing. For OCSiAl, it strengthens the commercial case that single-wall carbon nanotubes are becoming a practical performance material for next-generation batteries. For Serbia, it creates a rare connection to a strategic European battery platform without requiring the country to host a full cell factory.
The industrial signal is clear. Europe’s battery race will be decided not only by the largest plants, but by the suppliers that make those plants competitive. OCSiAl’s role at Salzgitter shows how a specialised material produced from a regional European base can enter the core of a major automotive battery programme. In a sector where every percentage point of energy density, cycle life, charging speed and production yield matters, the smallest materials can carry the largest strategic weight.
