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http://dx.doi.org/10.7464/ksct.2017.23.3.308

Performance of Carbon Cathode and Anode Electrodes Functionalized by N and O Doping Treatments for Charge-discharge of Vanadium Redox Flow Battery  

Lim, Hyebin (Department of Chemical Engineering, University of Seoul)
Kim, Jiyeon (Department of Chemical Engineering, University of Seoul)
Yi, Jung S. (Venergate Co., Ltd.)
Lee, Doohwan (Department of Chemical Engineering, University of Seoul)
Publication Information
Clean Technology / v.23, no.3, 2017 , pp. 308-313 More about this Journal
Abstract
In this study, we investigated the electrocatalytic effects of the N and O co-doping of Graphite Felt (GF) electrode for the vanadium redox flow battery (VRFB) at the cathode and the anode reaction, respectively. The electrodes were prepared by chemical vapor deposition (CVD) with $NH_3-O_2$ at 773 K, and its effects were compared with an electrode prepared by an O doping treatment. The surface morphology and chemical composition of the electrodes were characterized by scanning electron microscopy (SEM) and photoelectron spectroscopy (XPS). The electrocatalytic properties of these electrodes were characterized in a VRFB single cell comparing the efficiencies and performance of the electrodes at the cathode, anode, and single cell level. The results exhibited about 2% higher voltage and energy efficiencies on the N-O-GF than the O-GF electrode. It was found that the N and O co-doping was particularly effective in the enhancement of the reduction-oxidation reaction at the anode.
Keywords
Redox flow battery; Carbon electrode; Oxygen doping; Nitrogen doping; Surface functionalization; Vanadium;
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