Group14 Raises €150 Million to Build a 10 GWh Silicon Battery Materials Plant in Spain as Europe Seeks Its Own EV Supply Chain

The race to build better batteries outside China has drawn fresh capital to a company making a key ingredient that could make electric vehicles go further and charge faster.

Group14 Technologies, based in Woodinville, Washington, has raised €150 million, or about $169 million, through an extension of its Series D funding round, according to a company press release on Thursday, October 29, reported by Tech Startups. The investment came from a new investor that was not identified. Total Series D financing now exceeds $665 million.

Silicon for better batteries

Group14 makes silicon-carbon battery materials, including its flagship SCC55 product, which are used in the anode, the negative electrode of a lithium-ion battery. Most lithium-ion batteries today use graphite anodes. Silicon can store significantly more lithium than graphite, potentially increasing a battery's energy density, which means longer range for electric vehicles and longer battery life for phones and laptops.

Silicon has historically been difficult to use because it swells significantly during charging, which can damage the battery. Group14's silicon-carbon composite is designed to manage this expansion, allowing batteries to benefit from silicon's higher capacity while maintaining durability.

Building in Spain

The funding will support Group14's planned BAM-4 facility in Sagunto, Spain, which will initially have 10 gigawatt-hours (GWh) of annual capacity, according to Tech Startups. The company also operates a facility in South Korea and is developing production in Washington state. It expects a near-term footprint of 40 GWh once planned facilities are operating.

Group14 says its Woodinville facility has supplied more than 150 customers, according to the report.

Europe's battery ambitions

Europe has sought to build a domestic battery supply chain to support its automotive industry's shift to electric vehicles and reduce dependence on Asian suppliers, particularly China, which dominates battery materials production. The European Union has introduced policies to encourage local manufacturing of batteries and their components.

Spain has emerged as an important location for battery and electric vehicle investment, with projects from automakers and battery makers. Sagunto, near Valencia, is also the site of a large battery cell factory being developed by PowerCo, the battery company of Volkswagen Group.

China's dominance

China controls the vast majority of global production of graphite anode materials, as well as other key battery materials. Export restrictions imposed by China on graphite and related technologies have heightened concerns in the United States and Europe about supply chain security. Silicon-carbon anode materials produced outside China offer a potential alternative and a performance upgrade.

The investment also reflects a broader push by Western governments to build battery supply chains that are not dependent on China, with subsidies and trade measures aimed at encouraging local production of critical materials.

Beyond electric vehicles

Group14's materials are used in consumer electronics and drones as well as electric vehicles. Smartphone makers have begun adopting silicon-carbon batteries to increase battery capacity without increasing size. Drones, which are highly sensitive to battery weight, benefit from higher energy density, an area of growing importance given the expansion of drone use in defence and commercial applications.

Competition

Several companies are developing silicon anode materials, including Sila Nanotechnologies, Amprius, Nexeon and others, as well as Chinese manufacturers. Scaling production while maintaining quality and reducing costs is the key challenge for all of them.

Relevance for India

India is building its own battery manufacturing industry under a production-linked incentive scheme for advanced chemistry cell batteries, with companies including Ola Electric, Reliance and others developing cell factories. India also aims to develop domestic supply chains for battery materials. Advances in anode technology, such as silicon-carbon materials, could shape the competitiveness of Indian battery manufacturers, and Indian companies may seek partnerships with technology providers.

India's electric two-wheeler market, one of the largest in the world, would benefit from batteries with higher energy density and faster charging.

The manufacturing challenge

Producing advanced battery materials at scale is difficult and capital-intensive. Factories must maintain strict quality control, as small variations in material properties can affect battery performance and safety. Scaling from pilot production to gigawatt-hour volumes typically takes years and requires large investments, which is why battery materials companies raise substantial capital.

Group14's existing facilities in South Korea and Washington state give it manufacturing experience that it can apply to its Spanish plant.

Customers and partnerships

Battery materials companies typically work closely with battery cell makers and automakers, which must qualify new materials through extensive testing before using them in production. Group14 has previously attracted investment and partnerships from major industry players, including automakers and battery manufacturers. Long-term supply agreements with such customers are important for justifying large factory investments.

Climate impact

Better batteries play a central role in decarbonisation. Higher energy density can reduce the amount of material needed for a given range, lowering costs and environmental impact. Faster charging can make electric vehicles more convenient, encouraging adoption. Improved batteries also support the growth of renewable energy by making storage more efficient. Silicon anode materials are seen as one of the most promising near-term improvements to lithium-ion battery technology.

Policy support

In the United States, Group14 has benefited from government support for domestic battery manufacturing, including grants for its Washington state facility. In Europe, the EU and national governments offer subsidies and incentives to attract battery investment, and Spain has positioned itself as a hub for electric vehicle and battery production. Policy support helps offset the higher costs of manufacturing outside China and reduces the risks of investing in new facilities.

Investor confidence

Raising €150 million in an extension of its Series D signals continued investor confidence in Group14, despite a challenging environment for battery startups. Several battery companies in Europe and the United States have struggled financially, and some have collapsed, as electric vehicle adoption has slowed in certain markets and competition from Chinese suppliers has intensified.

What comes next

Group14 will use the funding to advance its Spanish facility and expand production capacity. Its progress will be watched as a test of whether advanced battery materials can be produced at scale outside China. As electric vehicles, consumer electronics and drones demand ever better batteries, companies like Group14 could play a crucial role in the energy transition.

Automakers and electronics makers will also be watching whether Group14 can deliver consistent quality at scale and at competitive prices, since those factors will determine how widely silicon-carbon anodes are adopted and how quickly they displace conventional graphite in the batteries of the future.