On January 7, 2026, Axens Group, Syensqo and IFP Energies nouvelles (IFPEN) announced the formation of a new joint-venture company dedicated to advancing solid-state battery technology in Europe. Named Argylium, the venture will concentrate on the development, scale-up and commercial demonstration of high-performance sulfide solid electrolytes for all-solid-state batteries (ASSBs).
Argylium’s initial activities will leverage Syensqo’s existing solid-state battery pilot line in La Rochelle, France, which builds on technologies developed at the company’s Paris laboratory. By combining Syensqo’s practical operating experience with Axens’ industrial expertise and IFPEN’s public research capabilities, the partners aim to industrialize next-generation sulfide electrolyte materials that can meet the stringent safety and performance requirements for automotive and stationary energy storage applications.
The new company plans to establish production and development facilities in France, where it will optimize manufacturing processes, refine material formulations and perform large-scale demonstrations of its electrolyte products. Sulfide-based solid electrolytes are known for their high ionic conductivity and compatibility with lithium metal anodes, making them a key enabler for higher-energy-density, safer battery systems.
By localizing critical supply-chain components within Europe, Argylium seeks to support regional efforts to reduce dependence on imported battery materials and strengthen domestic production capabilities. The joint venture partners anticipate that commercial-scale output of solid-state electrolytes will begin in the coming years, aligning with the broader acceleration of electric-vehicle deployment and grid-scale energy storage projects.
Stakeholders in the automotive and renewable energy industries have shown increasing interest in solid-state solutions, driven by the promise of improved safety margins, faster charging rates and extended lifecycles compared to conventional liquid-electrolyte cells. Argylium’s collaborative approach is designed to address remaining technical and manufacturing challenges while advancing Europe’s competitiveness in next-generation battery technologies.
Source: PV Magazine
