High Voltage Redox-Meditated Flow Batteries with Prussian Blue Solid Booster

John Ostrander, Reza Younesi and Ronnie Mogensen
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John Ostrander: Department of Chemistry–Ångström Laboratory, Uppsala University, Box 538, 75121 Uppsala, Sweden
Reza Younesi: Department of Chemistry–Ångström Laboratory, Uppsala University, Box 538, 75121 Uppsala, Sweden
Ronnie Mogensen: Department of Chemistry–Ångström Laboratory, Uppsala University, Box 538, 75121 Uppsala, Sweden

Energies, 2021, vol. 14, issue 22, 1-9

Abstract: This work presents Prussian blue solid boosters for use in high voltage redox-mediated flow batteries (RMFB) based on non-aqueous electrolytes. The system consisted of sodium iodide as a redox mediator in an acetonitrile catholyte containing solid Prussian blue powder. The combination enabled the solid booster utilization in the proposed systems to reach as high as 66 mAh g −1 for hydrated Prussian blue and 110 mAh g −1 for anhydrous rhombohedral Prussian blue in cells with an average potential of about 3 V (vs. Na + /Na). Though the boosted system suffers from capacity fading, it opens up possibilities to develop non-aqueous RMFB with low-cost materials.

Keywords: flow battery; Prussian blue; solid booster; redox-mediated; non-aqueous (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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