LeydenJar Secures €23 Million, Including U.S. Customer Backing, to Build Silicon-Anode Plant in Eindhoven

Overview

• The package combines a €13 million equity round led by Extantia and Invest-NL with a €10 million commitment from an unnamed leading U.S.-based consumer electronics company tied to production equipment.
• LeydenJar will use the funds to build the first phase of its PlantOne facility in Eindhoven, with operations targeted for 2027.
• The company’s process uses PECVD to grow porous silicon columns directly on copper, a design intended to manage silicon swelling and cut manufacturing emissions.
• LeydenJar cites energy-density gains of roughly 50% and up to about 70% versus graphite, faster charging, and reported durability in the 450–500+ cycle range without external pressure.
• Commercial rollout targets smartphones and wearables first, with longer-term EV ambitions requiring additional validation as today’s anode supply remains concentrated in China.