LeydenJar, a Dutch company working on battery technology, has received new funding to expand its operations and support production.
LeydenJar, a Leiden-based company developing silicon anodes for lithium-ion batteries, announced €13M in equity financing led by Extantia and Invest-NL. The funds will be used to complete the construction of its PlantOne facility in Eindhoven and support the start of operations in 2027.
Additionally, the company received €10M in customer funding from a US-based consumer electronics company for the development and installation of production equipment.
Yair Reem, Partner at Extantia, says, “In the global battery race, you either lead with breakthrough technology or you fall behind. LeydenJar is a true technological leapfrog. Their pure silicon anode platform is setting a new global benchmark for energy density, creating a product that doesn’t just compete with — but has the potential to surpass — the most advanced battery cells from top-tier producers in China. We are proud to back a future global leader in this critical industry.”
Boosting the energy density of Li-ion batteries
LeydenJar develops 100 per cent pure silicon anodes for lithium-ion batteries. Its technology increases battery capacity by 50 per cent, enabling smaller and lighter batteries.
The technology is designed to increase energy density, enable faster charging, and reduce carbon emissions, supporting the development of new battery-powered products and technologies.
The company’s technology is used with cell manufacturing partners to support products such as AI-powered wearables, electric vehicles with longer range, and electric aviation.
LeydenJar was founded in 2016 by co-founder Christian Rood as a spin-off from TNO and is headquartered in Leiden, with operations in Eindhoven.
Capital utilisation
LeydenJar looks to advance toward full-scale production of its silicon anode technology.
The PlantOne facility will host Plasma Enhanced Chemical Vapour Deposition (PECVD) machines for producing silicon anode rolls at scale, with an annual output of 125,000 m² of Silyte, enough to supply five million smartphone batteries or meet global demand for earbuds.
The company also plans to expand its commercial organisation and operational infrastructure to support growing customer demand and prepare for full industrial deployment.
Currently, LeydenJar has operations in Europe, Asia, and the US and continues to scale its technology for global battery production.
Christian Rood, CEO and co-founder of LeydenJar, says, “This funding marks a pivotal moment for LeydenJar. We’re now moving from breakthrough lab innovation to full-scale production. Our technology is already integrated into the roadmaps of some of the world’s most ambitious product developers, and with PlantOne, we’ll be ready to deliver at scale.”
Evelien Bijl, investment manager at Invest-NL, adds, “It’s inspiring to witness LeydenJar’s journey from promising technology to now becoming a production company with global ambitions up close. We believe in the potential of LeydenJar’s pure silicon anodes to transform the battery industry, and we’re particularly encouraged by the strong commercial traction the company is already seeing.”
