United Statesfactorialenergy.com
Factorial Energy (legal name: Factorial Inc.) is a U.S.-based developer of advanced solid-state battery technology, headquartered in the greater Boston area with facilities in Woburn and Methuen, Massachusetts. Founded in 2019 as a spin-out from a Cornell University heritage company, it specializes in high-energy-density batteries using proprietary platforms like FEST® (quasi-solid polymer electrolyte with lithium-metal anode), Solstice™ (sulfide-based all-solid-state electrolyte), and Gammatron™ (AI-driven development tools).
These batteries offer improved safety, higher energy density (up to 375 Wh/kg validated), thermal stability, and compatibility with existing lithium-ion manufacturing processes, targeting applications in electric vehicles, defense, drones, robotics, and energy storage. Key partnerships include Mercedes-Benz, Stellantis, Hyundai, Kia, and POSCO Future M. Milestones encompass shipping 100+ Ah cells, achieving UN 38.3 certification, and enabling over 1,200 km range in test vehicles. The company emphasizes scalable production and sustainability through lithium recycling initiatives.
Targets mass production and supply in 2028; material delivers more than four times graphite energy and retains over 80% capacity after 1,000 cycles at ≥20% blend.
