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http://dx.doi.org/10.9713/kcer.2019.57.1.17

Active Material Crossover through Sulfonated Poly (Ether Ether Ketone) Membrane in Iron-Chrome Redox Flow Battery  

Kim, Young-Sook (ETIS Co.)
Oh, So-Hyeong (Department of Chemical Engineering, Sunchon National University)
Kim, You-Jeong (Department of Chemical Engineering, Sunchon National University)
Kim, Seong-ji (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.57, no.1, 2019 , pp. 17-21 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 an urgent problem. One of the reasons for the low performance is the crossover of the active materials. In this study, the sulfonated Poly (ether ether ketone) (sPEEK) membrane, which is a hydrocarbon membrane, was used instead of the fluorine membrane to reduce the crossover of the active materials. The chromium ion permeability of the sPEEK membrane was $1.8{\times}10^{-6}cm^2/min$, which was about 1/33 of that of the Nafion membrane. Thus, it was shown that the use of the sPEEK membrane instead of the fluorine membrane could solve the high active material crossover problem. The activation energy of iron diffusion through the sPEEK membrane was 24.9 kJ/mol, which was about 66% of Nafion membrane. And that the e-PTFE support in the polymer membrane reduces the active material crossover through Iron-Chrome Redox Flow Battery (ICRFB).
Keywords
Redox flow battery; Iron; Chrome; Crossover; sPEEK; Membrane;
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Times Cited By KSCI : 3  (Citation Analysis)
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