New company builds on Syensqo’s pilot success to scale advanced solid-state electrolyte materials
Brussels, Belgium, and Rueil-Malmaison, France, 6 January 2026,
Syensqo and Axens today announced the launch of Argylium, a new company dedicated to developing and scaling-up commercial demonstration of advanced materials for solid-state batteries in Europe. This collaboration represents an important step toward strengthening Europe’s innovation and excellence in creating the next generation of batteries.
Solid-state batteries are considered one of the most promising solutions for the next generation of electric vehicles and energy storage systems. By replacing liquid electrolytes with solid materials, they offer greater safety, higher energy density, and the potential for faster charging.
Building on Syensqo’s successful operation of a solid-state battery pilot line in La Rochelle, and over a decade of technology development at its State-of-the-art Paris laboratory (Aubervilliers), Argylium will focus on accelerating the industrialization of next-generation Sulfide Solid Electrolyte materials to the next-generation All-Solid-State Batteries (ASSB).
The new company brings together Syensqo’s leadership in advanced materials with Axens Group’s proven expertise in process design, industrial scale-up and global operation of in-organic chemistry industrial plants, complemented by IFPEN’s renowned know-how in inorganic chemistry and expertise in oxide or sulfide divided materials at its Lyon research center.
The creation of Argylium represents an important step forward in bringing solid-state battery materials to market readiness. By joining forces with Axens and IFPEN, we are enhancing the chances of successfully scaling up Syensqo’s pilot innovations and contributing to advance Europe’s electrification and energy storage ambitions.
With over 50 years experience in scaling up technologies to the commercial levels, in partnership with IFPEN and aligned with our strategy to develop industrial assets in Europe for the production of advanced battery materials for cathodes (CAM) and recycling of Black Mass, our association with Syensqo aims to lay the groundwork and build a robust ecosystem for the commercialization of solid electrolytes by 2030.
Argylium will strengthen collaboration with leading European research institutions, automotive OEMs, advanced battery manufacturers and energy technology partners to drive innovation and market readiness, contributing to Europe’s ambition of building a sustainable and competitive solid-state battery industry.
About Argylium
Based in France, Argylium is the most advanced company in Europe in the research, development and industrialization of Sulfides Solid Electrolytes. By joining the forces of 3 pioneering industrial players, Argylium helps to accelerate the transition toward next-generation energy solutions. With Syensqo All Solid State Batteries Team, Axens’ deep expertise in inorganic chemistry and industrial process scale-up, and IFPEN’s renowned know-how in materials science, Argylium commits to leading the design and industrial production of high-performance Sulfide Solid Electrolytes for All Solid State Battery markets.
With over 10 years of experience in this field, a world-class R&D team and unique large assets, Argylium is the priviledged partner that supports industries in the design of tomorrow’s breakthrough innovations.
About Axens
Axens is a French MSE in the energy sector, which has become one of the world leaders in mineral chemistry through the production and sale of catalysts for the oil and chemical industry, and the provision of innovative technology. As part of its diversification into low-carbon technologies with adjacencies to its core business, the Axens Group is helping to provide the missing pieces of the French and European value chain for battery production and to meet the exponential needs of future European gigafactories and the automotive industry.
About Syensqo
Syensqo is a science company developing groundbreaking solutions that enhance the way we live, work, travel and play. Inspired by the scientific councils which Ernest Solvay initiated in 1911, we bring great minds together to push the limits of science and innovation for the benefit of our customers, with a diverse, global team of more than 13,000 associates in 30 countries.
Our solutions contribute to safer, cleaner, and more sustainable products found in homes, food and consumer goods, planes, cars, batteries, smart devices and healthcare applications. Our innovation power enables us to deliver on the ambition of a circular economy and explore breakthrough technologies that advance humanity.
Learn more at www.syensqo.com