Abstract
Using natural selection as a toolkit we have elucidated an active material for nonaqueous redox flow batteries (NRFB) that is stable to deep cycling, both under static cell conditions and in an operating flow battery, even in the presence of water. The compound is an analogue of molecules biosynthesized by Amanita mushrooms and was chosen as a molecular scaffold for a new family of NRFB due to its redox reversibility, ease of synthesis and extraordinary stability.