Aqueous organic redox flow batteries stand as a promising alternative to vanadium as, based on the use of readily available organic molecules as redox-active material, they offer great versatility in terms of energy density, working voltage, and stability.
Researchers at CIC energiGUNE have been developed low-cost and non-toxic redox electrolyte compounds with high water-solubility, fast kinetics, and involving reversible and multiple proton-coupled electron-transfer redox reactions to be used as anolyte or/and catholyte in a redox flow battery. Thanks to an innovative strategy the solubility of organic compounds, barely soluble in water, was boosted impacting the energy density and performance strongly.
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Montserrat Galceran (CIC energiGUNE), Montse Casas-Cabanas (CIC energiGUNE), Michel Armand (CIC energiGUNE), Abdelbast Guerfi (Hydro Quebec) and Karim Zaghib (Hydro Quebec)