Dutch deep-tech firm secures equity and customer funding to complete PlantOne factory and start operations in 2027.
LeydenJar, a Dutch deep-tech company developing 100% pure silicon anodes for lithium-ion batteries, has raised €13 million in equity financing led by Extantia and Invest-NL. The company also secured €10 million in customer funding from a U.S.-based consumer electronics company, bringing total new backing to €23 million.
The financing will support the completion of LeydenJar’s PlantOne facility in Eindhoven, set to begin operations in 2027. PlantOne will house proprietary PECVD machines to produce silicon anode rolls at scale, targeting 125,000 m² annually—enough for 5 million smartphone batteries or the global demand for earbuds.
“This funding marks a pivotal moment for LeydenJar” said CEO and co-founder Christian Rood. “We’re now moving from breakthrough lab innovation to full-scale production. With PlantOne, we’ll be ready to deliver at scale.”
LeydenJar’s pure silicon anode technology boosts battery capacity by 50%, enabling smaller, lighter, and more powerful batteries. Applications range from AI-powered wearables and longer-range EVs to electric aviation. The technology also reduces CO2 emissions by 85% compared to conventional anodes.
“In the global battery race, you either lead with breakthrough technology or you fall behind” said Extantia partner Yair Reem. “LeydenJar is setting a new global benchmark for energy density.”
Invest-NL investment manager Evelien Bijl said the company’s commercial traction underscores its global ambitions: “We believe in the potential of LeydenJar’s pure silicon anodes to transform the battery industry.”
Founded in 2016 as a spin-off from TNO, LeydenJar is headquartered in Leiden with operations across Europe, Asia, and the U.S. The PlantOne project reflects its transition from R&D into large-scale production, with plans to expand its commercial organization alongside industrial deployment.