Publication: A High Voltage Aqueous Zinc–Organic Hybrid Flow Battery
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Date
2019-05-17
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Wiley
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Citation
Aziz, Michael, Minjoon Park, Emily Kerr, Diana De Porcellinis, Eugene S. Beh, Eric M. Fell, Yan Jing et al. "A High Voltage Aqueous Zinc–Organic Hybrid Flow Battery." Advanced Energy Materials 9, no. 25 (2019): 1900694. DOI: 10.1002/aenm.201900694
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Abstract
Water‐soluble redox‐active organic molecules have attracted extensive attention as electrical energy storage alternatives to redox‐active metals that are low in abundance and high in cost. Here an aqueous zinc–organic hybrid redox flow battery (RFB) is reported with a positive electrolyte comprising a functionalized 1,4‐hydroquinone bearing four (dimethylamino)methyl groups dissolved in sulfuric acid. By utilizing a three‐electrolyte, two‐membrane configuration this acidic positive electrolyte is effectively paired with an alkaline negative electrolyte comprising a Zn/[Zn(OH)4]2− redox couple and a hybrid RFB is operated at a high operating voltage of 2.0 V. It is shown that the electrochemical reversibility and kinetics of the organic redox species can be enhanced by an electrocatalyst, leading to a cyclic voltammetry peak separation as low as 35 mV and enabling an enhanced rate capability.
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General Materials Science, Renewable Energy, Sustainability and the Environment
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