화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.31, No.11, 2081-2087, November, 2014
DOI10.1007/s11814-014-0157-5  Export Citation
Effect of nafion membrane thickness on performance of vanadium redox flow battery
Sanghyun Jeong, Lae-Hyun Kim1, Yongchai Kwon†, and Sunhoe Kim2, †
  • Graduate School of Energy and Environment, Seoul National University of Science and Technology, 232, Gongneung-ro, Nowon-gu, Seoul 139-743, Korea
  • 1Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology, 232, Gongneung-ro, Nowon-gu, Seoul 139-743, Korea
  • 2Department of New Energy and Resource Engineering, Sangji University, Sangjidae-gil, Wonju-si, Gangwon-do 220-702, Korea
E-mail:,
The performance of vanadium redox ow batteries (VRFBs) using different membrane thicknesses was evaluated and compared. The associated experiments were conducted with Nafion® 117 and 212 membranes that have 175 and 50 μm of thickness, respectively. The charge efficiency (CE) and energy efficiency (EE) of VRFB using Nafion® 117 were higher than those of VRFB using Nafion® 212, while power efficiency was vice versa. In terms of amounts of charge and discharge that are measured in different charging current densities, the amounts in VRFB using Nafion® 212 are more than that in VRFB using Nafion® 117. To further characterize the effect of membrane thickness on VRFB performance, electrochemical impedance spectroscopy (EIS) and UV-vis. spectrophotometer (UV-vis) were used. In EIS measurements, VRFB using Nafion® 117 was more stable than that using Nafion® 212, while in UV-vis measurements, vanadium crossover rate of VRFB usingNafion® 212 (0.0125M/hr) was higher than that of VRFB using Nafion® 117 (0.0054 M/hr). These results are attributed to high crossover rate of vanadium ion in VRFB using Nafion® 212. With these results, vanadium crossover plays more dominant role than electrochemical reaction resistance in deciding performance of VRFB in condition of different membranes.
Keywords:Vanadium Redox Flow Battery;Proton Exchange Membrane;Energy Storage System;Electrical Conductivity,Electrochemical Impedance;Membrane Thickness
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