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LeydenJar Technologies B.V. is a spin out venture from Dutch technology institute ECN, developing a 100% Silicon anode that enables Li-ion batteries with high energy density for electric vehicles, consumer electronics, and stationary energy storage.

Our technology is based on a proprietary PECVD proces that is unique in its direct depositioning of silicon on copper foil, rather than existing capital intensive coating processes. PECVD is a mature manufacturing process currently applied in the semiconductor and PV industries.

  • LJT’s silicon based anode material is 5 times smaller and 10 times lighter. We expect that this could result in smaller, and lighter batteries:  batteries that could store (and deliver) 50% more energy than current Li-ion batteries of similar size and weight.
  • Energieonderzoek Centrum Nederland (“ECN”) has developed the technology and production process.
  • LJT commercializes the technology with ECN through an exclusive, worldwide license.
  • Silicon based anodes can have a 10 x higher capacity (3.800 mAh/g) than graphite based anodes (380 mAh/g), but today have a short battery cell life due to crumbling of the material. In a joint effort with top Dutch research institutes and universities, LJT’s silicon deposited foil is being optimized and tested for use as anode material.
  • struBased on a 0.1μm layer thickness, a capacity of 3.800 mAh/g has been demonstrated at a Coulombic efficiency of nearly 100%, with a long cyclic stability of 100 cycles. The nanostructure of the material addresses the porosity issue, see figure. LJT is working on creating a stable 10μm layer.
  • Production is based on a modified, mature process, developed in the solar panel industry, where it has already been demonstrated at scale.
  • LJT operates its production facility at the ECN location of the High Tech Campus in Eindhoven, The Netherlands.