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Indolo[2,3- b ]quinoxaline as a Low Reduction Potential and High Stability Anolyte Scaffold for Nonaqueous Redox Flow Batteries.
- Source :
-
Journal of the American Chemical Society [J Am Chem Soc] 2023 Aug 30; Vol. 145 (34), pp. 18877-18887. Date of Electronic Publication: 2023 Aug 16. - Publication Year :
- 2023
-
Abstract
- Redox flow batteries (RFBs) are a promising stationary energy storage technology for leveling power supply from intermittent renewable energy sources with demand. A central objective for the development of practical, scalable RFBs is to identify affordable and high-performance redox-active molecules as storage materials. Herein, we report the design, synthesis, and evaluation of a new organic scaffold, indolo[2,3- b ]quinoxaline, for highly stable, low-reduction potential, and high-solubility anolytes for nonaqueous redox flow batteries (NARFBs). The mixture of 2- and 3-( tert -butyl)-6-(2-methoxyethyl)-6 H -indolo[2,3- b ]quinoxaline exhibits a low reduction potential (-2.01 V vs Fc/Fc <superscript>+</superscript> ), high solubility (>2.7 M in acetonitrile), and remarkable stability (99.86% capacity retention over 49.5 h (202 cycles) of H-cell cycling). This anolyte was paired with N -(2-(2-methoxyethoxy)-ethyl)phenothiazine (MEEPT) to achieve a 2.3 V all-organic NARFB exhibiting 95.8% capacity retention over 75.1 h (120 cycles) of cycling.
Details
- Language :
- English
- ISSN :
- 1520-5126
- Volume :
- 145
- Issue :
- 34
- Database :
- MEDLINE
- Journal :
- Journal of the American Chemical Society
- Publication Type :
- Academic Journal
- Accession number :
- 37585274
- Full Text :
- https://doi.org/10.1021/jacs.3c05210