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A Water-Miscible Quinone Flow Battery with High Volumetric Capacity and Energy Density AITranslate

Shijian Jin; Yan Jing; David G. Kwabi; Yunlong Ji; Liuchuan Tong; Diana De Porcellinis; MarcAntoni Goulet; Daniel A. Pollack; Roy G. Gordon; Michael J. Aziz;
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Abstract AITranslate

A water-miscible anthraquinone with polyethylene glycol (PEG)-based solubilizing groups is introduced as the redox-active molecule in a negative electrolyte (negolyte) for aqueous redox flow batteries, exhibiting the highest volumetric capacity among aqueous organic negolytes. We synthesized and screened a series of PEG-substituted anthraquinones (PEGAQs) and carefully studied one of its isomers, namely, 1,8-bis(2-(2-(2-hydroxyethoxy)ethoxy)ethoxy)anthracene-9,10-dione (AQ-1,8-3E-OH), which has high electrochemical reversibility and is completely miscible in water of any pH. A negolyte containing 1.5 M AQ-1,8-3E-OH, when paired with a ferrocyanide-based positive electrolyte across an inexpensive, nonfluorinated permselective polymer membrane at pH 7, exhibits an open-circuit potential of 1.0 V, a volumetric capacity of 80.4 Ah/L, and an energy density of 25.2 Wh/L.

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DOI：https://doi.org/10.1021/acsenergylett.9b00739

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Citation Information:

A water-miscible anthraquinone with polyethylene glycol (PEG)-based solubilizing groups is introduced as the redox-active molecule in a negative electrolyte (negolyte) for aqueous redox flow batteries, exhibiting the highest volumetric capacity among aqueous organic negolytes. We synthesized and screened a series of PEG-substituted anthraquinones (PEGAQs) and carefully studied one of its isomers, namely, 1,8-bis(2-(2-(2-hydroxyethoxy)ethoxy)ethoxy)anthracene-9,10-dione (AQ-1,8-3E-OH), which has high electrochemical reversibility and is completely miscible in water of any pH. A negolyte containing 1.5 M AQ-1,8-3E-OH, when paired with a ferrocyanide-based positive electrolyte across an inexpensive, nonfluorinated permselective polymer membrane at pH 7, exhibits an open-circuit potential of 1.0 V, a volumetric capacity of 80.4 Ah/L, and an energy density of 25.2 Wh/L.

quote

GB/T 7714-2015 [1] Shijian Jin, Yan Jing, David G. Kwabi, et al. ACS Energy Letters, 2019(4). DOI:10.1021/acsenergylett.9b00739.
MLA [1] Shijian Jin, et al., ACS Energy Letters, no. 4, 2019, https://doi.org/10.1021/acsenergylett.9b00739.
APA [1] Shijian Jin, Yan Jing, David G. Kwabi, Yunlong Ji, Liuchuan Tong, Diana De Porcellinis, MarcAntoni Goulet, Daniel A. Pollack, Roy G. Gordon, & Michael J. Aziz. (2019). ACS Energy Letters(4). https://doi.org/10.1021/acsenergylett.9b00739
IEEE [1] Shijian Jin, Yan Jing, David G. Kwabi, Yunlong Ji, Liuchuan Tong, Diana De Porcellinis, MarcAntoni Goulet, Daniel A. Pollack, Roy G. Gordon, and Michael J. Aziz, ACS Energy Letters, no. 4, 2019, doi: 10.1021/acsenergylett.9b00739.