# Leydenjar Technologies

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/leydenjar-technologies-b-v

- Industry: Energy Storage & Batteries
- Headquarters: Leiden, Netherlands
- Website: www.leyden-jar.com
- Total disclosed funding: $41M
- Latest round: Series B (Jul 21, 2025)
- Investors on record: 8

## About

Leydenjar Technologies B.V. is a Netherlands-based company focused on advancing battery technology through its innovative Silyte™ silicon anode solutions, enhancing energy density and performance in lithium-ion batteries.Founded in 2016 and headquartered in Eindhoven, Netherlands, Leydenjar Technologies specializes in developing silicon anode technology for lithium-ion batteries. The company recently raised EUR 13 million in funding, in July 2025, co-led by Extantia and Invest-NL, to support its growth initiatives and production scaling. The founder's previous entrepreneurial endeavors are not documented, and there have been no significant pivots or changes in business strategy publicly reported.Leydenjar specializes in the development of Silyte™, a next-generation pure silicon anode technology that significantly enhances the energy density of lithium-ion batteries. Silyte™ is designed to provide batteries that are exceptionally powerful, compact, and capable of rapid charging. These anodes mitigate common issues associated with silicon, such as swelling, ensuring mechanical stability when lithiated. The primary applications of Leydenjar's technology span various sectors, including wearables, mobile devices, and e-mobility solutions, catering to innovative companies in consumer electronics and transportation industries. The company's products are marketed globally, with a focus on key markets including North America, Europe, and Asia, where there is a growing demand for high-performance battery solutions.Leydenjar generates revenue through direct partnerships with manufacturers and technology firms that integrate their Silyte™ anodes into end products. The company engages in business-to-business transactions, primarily focusing on collaborations with Fortune 500 companies and startups looking to innovate in battery technology. Revenue is derived from the sale of their flagship product, Silyte™, with transactions structured around long-term supply agreements tailored to manufacturers' production needs. The pricing model typically reflects the value added by the enhanced performance and sustainability features of Silyte™, facilitating a competitive edge in markets where rapid advancements in battery technology are essential. In July 2025, Leydenjar Technologies B.V. raised EUR 13 million in series B funding, which will be utilized to launch its first facility for producing silicon anodes at scale. The company aims to expand its operations into new markets including North America and Asia, targeting specific regions with high demands for advanced battery solutions. The recent funding will enhance Leydenjar's production capabilities and support the rollout of its innovative products to meet the increasing global appetite for high-performance battery technology.

## Funding rounds

- Series B, Jul 21, 2025, $15M — Invest-NL, Extantia
- Series A, Aug 27, 2021, $26M — ING Wholesale Banking, Catalus Capital, BOM Brabant Ventures, DOEN Participaties, Invest-NL, PVS Investments, Somerset Capital Partners

## Investors

- ING Wholesale Banking (https://capitalatlas.ai/funds/ing-wholesale-banking) — Series A
- Catalus Capital (https://capitalatlas.ai/funds/catalus-capital) — Series A
- BOM Brabant Ventures (https://capitalatlas.ai/funds/bom-brabant-ventures) — Series A
- DOEN Participaties (https://capitalatlas.ai/funds/doen-participaties) — Series A
- Invest-NL — Series A, Series B
- PVS Investments (https://capitalatlas.ai/funds/pvs-investments) — Series A
- Somerset Capital Partners (https://capitalatlas.ai/funds/somerset-capital-partners) — Series A
- Extantia (https://capitalatlas.ai/funds/extantia) — Series B