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http://dx.doi.org/10.9713/kcer.2018.56.1.24

Iron-Chrome Crossover through Nafion Membrane in Iron-Chrome Redox Flow Battery  

Kim, Young-Sook (ETIS Co)
Oh, So-Hyeong (Department of Chemical Engineering, Sunchon National University)
Kim, Eunbi (Department of Chemical Engineering, Sunchon National University)
Kim, Dayoung (Department of Chemical Engineering, Sunchon National University)
Kim, Seongji (Department of Chemical Engineering, Sunchon National University)
Chu, Cheun-Ho (ETIS Co)
Park, Kwonpil (Department of Chemical Engineering, Sunchon National University)
Publication Information
Korean Chemical Engineering Research / v.56, no.1, 2018 , pp. 24-28 More about this Journal
Abstract
The redox flow battery (RFB) is a large-capacity energy storage equipment, and the vanadium redox flow cell is a typical RFB, but VRFB is expensive. Iron-chrome RFBs are economical because they use low-cost active materials, but their low performance is a urgent problem. In this study, the crossover of iron and chromium ion through Nafion membrane and the stability of Nafion membrane in HCl solution were investigated. The permeability of iron and chrome ion through Nafion were $5.5{\times}10^{-5}$ and $6.0{\times}10^{-5}cm^2/min$, respectively, which was 18.9~20.7 times higher than that of vanadium ion ($2.9{\times}10^{-6}cm^2/min$). The crossover of iron and chromium ions were shown to be a cause of performance decrease in Iron-chrome RFB. As the temperature increases, the crossover increases rapidly (activation energy 38.8 kJ/ mol), indicating that operation at low temperature is a methode to reduce the performance loss due to crossover. Nafion membranes were relatively stable in 3 M HCl solution.
Keywords
Redox Flow Battery; Iron; Chrome; Crossover; Nafion; Membrane;
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Times Cited By KSCI : 2  (Citation Analysis)
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