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.
Official website: factorialenergy.com
