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http://dx.doi.org/10.5855/ENERGY.2014.23.3.150

Application of Porous Carbon Catalyst Activating Reaction of Positive Electrode in Vanadium Redox Flow Battery  

Jeong, Sanghyun (Graduate School of Energy and Environment, Seoul National University of Science and Technology)
Chun, Seung-Kyu (Graduate School of Energy and Environment, Seoul National University of Science and Technology)
Lee, Jinwoo (Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH))
Kwon, Yongchai (Graduate School of Energy and Environment, Seoul National University of Science and Technology)
Publication Information
Journal of Energy Engineering / v.23, no.3, 2014 , pp. 150-156 More about this Journal
Abstract
In this study, we implemented a research for improving performance of redox flow battery (RFB) via enhancing reaction rate of vanadium reaction ($[VO]^{2+}/[VO_2]^+$) that was a rate determining step. For doing that, porous catalyst, CMK3 was employed and its perfoamance was compared with that of Vulcan(XC-72) and commercial Pt/C (Johnson-Matthey Pt 20wt.%). Cyclic voltammetry (CV) was used for inspecting reactivity, while its structural feature was measured by TEM and BET&BJH. Also, Charge-discharge trend was evaluated by single cell tests. As result, CMK3 showed 6 times better catalytic activity and twice better reversibility than Vulcan(XC-72), while it showed larger surface area than Vulcan XR due to its porous structure. Furthermore, CMK3 indicated 85% of reactivity and reversibility of commercial Pt/C despite its Pt-less situation. In single cell tests, when RFB adopted CMK3 as catalyst for positive electrode, its charge-discharge curve result was better than that adopted commercial Pt/C.
Keywords
redox flow battery; porous catalyst; positive reaction of vanadium; vanadium; Vulcan(XC-72); commercial Pt/C;
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Times Cited By KSCI : 1  (Citation Analysis)
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