According to their website[1], this is the extent of what they have to say about their technology: The Technology Form Energy has identified and is developing

According to their website[1], this is the extent of what they have to say about their technology: The Technology Form Energy has identified and is developing a novel approach that is low-cost, safe, and scalable. This battery would allow for a 100% renewable, carbon free grid. Super useful [1]" https://formenergy.com/about/ https://formenergy.com/about/