Behaviour of 3,4‐Dihydroxy‐9,10‐Anthraquinone‐2‐Sulfonic Acid in Alkaline Medium: Towards a Long‐Cycling Aqueous Organic Redox Flow Battery
| Autor: | Didier Floner, Florence Geneste, Solène Guihéneuf, Jean-Marie Fontmorin, Thibault Godet-Bar, Léa Chancelier, Aurore Lê |
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| Přispěvatelé: | Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Kemiwatt, ANRT, Région Bretagne, BPI France, Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA) |
| Rok vydání: | 2021 |
| Předmět: |
Potassium
Salt (chemistry) chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 01 natural sciences 7. Clean energy Redox Catalysis redox chemistry Electrochemistry [CHIM]Chemical Sciences Solubility Chemical decomposition chemistry.chemical_classification quinones Aqueous solution solubility stability 021001 nanoscience & nanotechnology Flow battery 0104 chemical sciences chemistry 0210 nano-technology energy density Nuclear chemistry |
| Zdroj: | ChemElectroChem ChemElectroChem, 2021, 8 (13), pp.2526-2533. ⟨10.1002/celc.202100284⟩ ChemElectroChem, Weinheim : Wiley-VCH, 2021, 8 (13), pp.2526-2533. ⟨10.1002/celc.202100284⟩ |
| ISSN: | 2196-0216 |
| Popis: | International audience; The performance of a redox compound in redox flow batteries (RFB) highly depends on the electrolytic medium and operating conditions. It is exemplified in this work with the commercially available and relatively low-cost dye 3,4-dihydroxy-9,10-anthraquinone-2-sulfonic acid (ARS), which was used as negolyte in basic medium. At high pH, the ARS behavior revealed interesting features for RFB applications, such as a low half-wave potential of -0.99 V (vs Ag/AgCl), negatively shifted by phenolate groups, and an improved solubility compared with acidic medium depending on the nature of the cations. For the highly soluble ARS potassium salt (ARSK), a maximum power density of 117 mW cm(-2) and a demonstrated energy density of 20 Wh L-1 were obtained with K-4[Fe(CN)(6)] as posolyte. The capacity slightly decreased during cycling, reaching 90 % after 325 cycles. A long cycling of ARS sodium salt (ARSNa) over 11 operating months was demonstrated in this work. A slow chemical degradation was highlighted giving rise to the formation of 3-hydroxy-9,10-anthraquinone-2-sulfonic acid (HAQS) as the main degradation product due to hydrodeoxygenation reaction. Interestingly, this compound exhibited high performance in RFB and a good stability with a loss of capacity of 0.29 % per day. |
| Databáze: | OpenAIRE |
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