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Title: A Two‐Electron Storage Nonaqueous Organic Redox Flow Battery

Journal Article · · Advanced Sustainable Systems
 [1];  [2]; ORCiD logo [2]; ORCiD logo [2];  [3];  [1];  [3]; ORCiD logo [2];  [1]
  1. Joint Center for Energy Storage Research (JCESR) 9700 Cass Ave Lemont IL 60439 USA, Argonne National Laboratory 9700 Cass Ave Lemont IL 60439 USA
  2. Joint Center for Energy Storage Research (JCESR) 9700 Cass Ave Lemont IL 60439 USA, Pacific Northwest National Laboratory 902 Battelle Blvd Richland WA 99352 USA
  3. Pacific Northwest National Laboratory 902 Battelle Blvd Richland WA 99352 USA

Abstract Nonaqueous redox flow batteries based on redox‐active organic materials (ROMs) are attractive for stationary energy storage applications, but inferior energy densities are demonstrated in reported systems. To address this limitation, a nonaqueous organic flow battery using two‐electron anthraquinone anolyte and phenothiazine catholyte materials is developed. Structural tailoring leads to greatly improved solubilities with the cell potentials of 1.63 and 2.80 V for the first and second electron transfer reactions, respectively, of optimized ROMs. Doubled charge storage capacities indicative of 2e reactions are achieved in proof‐of‐concept bulk electrolyte and flow cell demonstrations, albeit with only modest cyclability due to the limited stability of the second redox event. Although further improvement is still needed to attract practical interest, this study opens a promising pathway to increase the energy density for organic flow batteries and is expected to inspire more in‐depth studies of energy dense, stable ROMs.

Sponsoring Organization:
USDOE
OSTI ID:
1419372
Journal Information:
Advanced Sustainable Systems, Journal Name: Advanced Sustainable Systems Vol. 2 Journal Issue: 3; ISSN 2366-7486
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 49 works
Citation information provided by
Web of Science

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  • Journal of the American Chemical Society, Vol. 136, Issue 46, p. 16309-16316 https://doi.org/10.1021/ja508482e
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