Overview
- Factorial Energy and SK On signed a non‑binding memorandum of understanding Wednesday to start joint technical and manufacturing evaluations of Factorial’s FEST quasi‑solid‑state battery cells.
- The MoU is exploratory only and contains no binding commercial terms; any definitive agreements will depend on the results of the technical feasibility work.
- Factorial says its FEST platform is lithium‑metal compatible and targets energy densities above about 390 Wh/kg, and its cells have already been tested in prototype vehicles by Mercedes‑Benz and Stellantis.
- SK On brings a global lithium‑ion manufacturing footprint of roughly 200 GWh a year, including about 100 GWh in the U.S., and will assess whether existing production lines can be adapted to make FEST cells at scale.
- If feasibility is proven, the partnership would advance Factorial’s capital‑light plan to commercialize solid‑state tech via established makers, but key hurdles remain such as finding durable solid electrolytes and achieving defect‑free, high‑yield production.