High-energy density/ stability organic redox flow batteries from triphenylphosphine oxide, a 1,000s of tons/ year industrial byproduct

https://techxplore.com/news/2025-01-door-derived-redox-batteries.html

"1-pot reaction of waste into energy-storing molecule... electrons pack tightly together without losing losing negligible capacity after >350 cycles... first instance of utilizing phosphine oxides as the redox-active component in battery research... raditionally, reduced phosphine oxides are highly unstable, now overcome with molecular engineering, paving the way for their application in energy storage"