LeydenJar

LeydenJar, founded in 2016 in the Netherlands, develops advanced pure silicon anodes for lithium-ion batteries, boosting energy density by 70% and cutting CO₂ emissions by 85%. Their technology enhances batteries for electric vehicles, electronics, and more, promoting sustainable energy storage solutions.

Company Location

Country:

Netherlands

City:

Eindhoven and Leiden

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Company Overview

LeydenJar, established in 2016 in the Netherlands, specializes in developing advanced silicon anodes for lithium-ion batteries. With 90 employees representing 21 nationalities and operations in two locations, the company transforms conventional battery technology through pure silicon-based solutions to deliver 70% more energy storage and 85% lower CO2 emissions.

Battery Technology

Pure silicon anode technology manufactured via proprietary Plasma-Enhanced Chemical Vapor Deposition (PECVD) process creating ultra-thin silicon layers on copper substrates with 100% silicon content. Achieves 10x lithium ion storage vs graphite, 70% higher energy density, 10x thinner design, 7-minute charge to 80%, over 450 stable cycles, and 85% reduction in CO2 emissions. Integrates into existing battery manufacturing for EVs, consumer electronics, wearables, and drones.

Products

High-performance silicon anodes featuring 100% silicon composition, offering 70% energy density improvement, 10x thinner profiles, 7-minute charge to 80%, 450+ stable cycles, and 85% CO2 reduction in production.

Recent Projects

In 2024, launched construction of first industrial-scale anode factory at Strijp-T in Eindhoven, with 70 MWh capacity, operational by 2026; awarded Automotive Innovation Award 2024; research validated 85% CO2 reduction in production.

Investors

Raised approximately €100M from Yard Energy (Series A lead), Catalus Capital, Invest-NL, ING Sustainable Investments, and Somerset Capital Partners; secured €30M financing from the European Investment Bank backed by the European Commission; received additional backing from BOM Brabant Ventures, DOEN Participations, and PVS Investments; and obtained over €5M in subsidies from the Netherlands Enterprise Agency.

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