Most of the literature is related to use of Metal Acetylacetonate as redox species for NARFB. Is there any particular reason other than solubility?
Research on non-aqueous RFB chemistries have primarily focused on transition metal complexes bearing bipyridine, beta-diketonate, bis(acetylacetone) ethylenediamine, or dithiolene ligands dissolved in acetonitrile and/or propylene carbonate. Polyoxometalates, redox active organic molecules, and semi-solid electrolytes have also been explored. While many of these systems have favorable properties for flow battery applications (including reversible redox chemistries and high stabilities), they generally exhibit modest solubilities in organic solvents. To date, the most soluble transition metal complexes examined for non-aqueous RFB applications involving multiple electron transfers reach saturation at approx 0.8 M in acetonitrile. Single electron transfer complexes reach 1.8 M in carbonate solvents. Efforts to improve solubility in both types of systems have focused almost exclusively on commercially available ligands and transition metal complexes. As a result, there have been few systematic studies of the impact of chemical structure on the solubility, electrochemical, and battery performance-relevant properties of
transition metal active species in non-aqueous RFBs.
The ease of preparation, low cost, as well as the relatively high stability of the formed chelate, all properties of acac complexes, come into play.
- Badges
- Science method
- Similar topics
- Chemistry
- General Biochemistry
- Biochemical Techniques
- Analytical Chemistry