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Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .

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A High Voltage Aqueous Zinc–Organic Hybrid Flow Battery

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Title
A High Voltage Aqueous Zinc–Organic Hybrid Flow Battery
Author
Park, MinjoonBeh, Eugene S.Fell, Eric M.Jing, YanKerr, Emily F.De Porcellinis, DianaGoulet, Marc‐AntoniRyu, JaechanWong, Andrew A.Gordon, Roy G.Cho, JaephilAziz, Michael J.
Issue Date
2019-07
Publisher
Wiley-VCH Verlag
Citation
ADVANCED ENERGY MATERIALS, v.9, no.25, pp.1900694
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.
URI
https://scholarworks.unist.ac.kr/handle/201301/27286
URL
https://onlinelibrary.wiley.com/doi/full/10.1002/aenm.201900694
DOI
10.1002/aenm.201900694
ISSN
1614-6832
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