PRESS RELEASE

MERSEN SIGNS A CONTRACT WITH VULCAN ENERGY AS PART OF
EUROPE’S BATTERY INDUSTRY INITIATIVE

PARIS, APRIL 23, 2026 – Mersen (Euronext FR0000039620 – MRN), a global expert in electrical power and advanced materials, today announced the signing of a multi-million-euro contract with Vulcan Energy to supply an Eco&FLEX® unit for the Lionheart Project, Europe’s first fully integrated commercial lithium and renewable-energy initiative.

The unit will be installed at Vulcan Energy’s industrial site in Frankfurt, Germany, where it will support the conversion of lithium chloride into lithium hydroxide, an essential material for electric-vehicle battery manufacturing. It will also enable the recovery and reuse of the chlorine generated during the process, as well as the energy released, thereby enhancing the facility’s overall environmental performance.

Mersen was selected for its unique expertise combining high-quality isostatic graphite with its proprietary carbon impregnation technology enabling the achievement of an ultra-high-purity hydrochloric acid – essential in the production of battery-grade lithium for electric vehicles.

At the contract signing, Luc Themelin, Chief Executive Officer of Mersen, stated: “This contract strengthens Mersen’s positioning in markets related to the energy transition. It highlights the Group’s ability to deploy its technologies in the most innovative and demanding industrial projects. With our Eco&FLEX® technology and our unmatched expertise in isostatic graphite and carbon impregnation, we are contributing to sustainable lithium that meets the highest purity standards for the battery market.”

ABOUT VULCAN ENERGY

Vulcan Energy (ASX: VUL, FSE: VUL) is developing the world’s first integrated lithium and renewable energy business with a carbon-neutral footprint, aimed at decarbonizing battery production. Located in the Upper Rhine Valley brine field, between Germany and France, Vulcan’s Lionheart project is a flagship initiative for Europe’s energy resilience and its supply of critical raw materials.

Lithium will be extracted from underground geothermal brines with low impurity levels, using the industry-leading VULSORB® technology. Naturally heated, the brine powers the production and conversion of lithium into battery-grade material, while generating a renewable energy co-product used for operations, with excess sold on the local energy market. This integration, the technology employed, and the favorable brine chemistry enable Vulcan to be one of the lowest-cost lithium operations in the world. For Vulcan, extraction is only the starting point. The company has reinvented mining through innovation in order to integrate and capture a greater share of the value chain. The company has made a positive Final Investment Decision for Lionheart; construction is underway, contracts have been signed, and additional production phases are in preparation.

For more information: www.v-er.eu

ABOUT MERSEN

Mersen is a global expert in electrical power and advanced materials for high-tech industries. With more than 50 industrial sites and 24 R&D centers in 32 countries around the world, Mersen develops custom-built solutions and delivers key products for clients in order to meet the new technological challenges shaping tomorrow’s world. For over 130 years, Mersen has focused tirelessly on innovation to accompany its clients and meet their needs. Be it in wind power, solar, electronics, electric vehicles, aeronautics, space or many other sectors, wherever technology is progressing, you will always find a bit of Mersen.