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Published on: September 9, 2016
Anthraquinone-2,6-disulfamidic acid: an anolyte with low decomposition rates at elevated temperatures
Philip Rohland1,2, Kristin Schreyer1,2, Martin D Hager1,2
1Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena Humboldtstraße 10 07743 Jena Germany ulrich.schubert@uni-jena.de.
Abstract:
A new sulfamidic acid anthraquinone derivative was synthesized from 2,6-diaminoanthraquinone with high yields, designed for utilization in redox flow batteries. The active material was investigated with cyclic voltammetry, revealing a reversible redox reaction at approximately -0.65 V vs. Ag/AgCl at pH-values above 12. A stress test in a redox flow battery was applied with hold times at critical states of charge and at 32 °C as well as at 60 °C. Furthermore, the stability was investigated at the maximum concentration of the anolyte. All in all, the material showed the lowest decomposition rates at 60 °C reported so far for an organic anolyte in a redox flow battery.
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