Journal of Industrial and Engineering Chemistry

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Application of Psf-PPSS-TPA composite membrane in the all-vanadium redox flow battery

  • Kim, Joeng-Geun (Div. Energy Efficiency & Materials Convergence Research, Korea Institute of Energy Research) ;
  • Lee, Sang-Ho (Div. Energy Efficiency & Materials Convergence Research, Korea Institute of Energy Research) ;
  • Choi, Sang-Il (Div. Energy Efficiency & Materials Convergence Research, Korea Institute of Energy Research) ;
  • Jin, Chang-Soo (Div. Energy Efficiency & Materials Convergence Research, Korea Institute of Energy Research) ;
  • Kim, Jae-Chul (Convergence Technology Research Institute, Hoseo University) ;
  • Ryu, Cheol-Hwi (Convergence Technology Research Institute, Hoseo University) ;
  • Hwang, Gab-Jin (Convergence Technology Research Institute, Hoseo University)
  • Received : 2009.12.22
  • Accepted : 2010.04.06
  • Published : 2010.09.25
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Abstract

The Psf-PPSS-TPA composite cation exchange membrane consist of Psf(polysulfone)-PPSS (poly-phenylenesulfidesulfone) block copolymer with TPA (tungstophosphoric acid) is prepared to apply for a separator in the all-vanadium redox flow battery. The membrane properties such as membrane resistance and ion exchange capacity, and thermal stability are investigated. The prepared Psf-PPSS-TPA composite cation exchange membrane showed higher thermal stability than Nafion117. The lowest membrane resistance of the prepared Psf-PPSS-TPA composite cation exchange membrane measured in 1 M ($mol/dm^3$) $H_2SO_4$ aqueous solution was $0.94{\Omega}cm^2$ at 0.5 g of TPA solution. The performance properties of the all-vanadium redox flow battery (V-RFB) using the prepared cation exchange membrane are measured. The electromotive force, open circuit voltage at state of charge (SOC) of 100%, was 1.4 V. This value meets a theoretical electromotive force value of the V-RFB. The measuring cell resistance in charge and discharge at SOC 100% were 0.26 ${\Omega}$ and 0.31 ${\Omega}$, respectively. The results of the present study suggest that the prepared Psf-PPSS-TPA composite cation exchange membrane is well suited for use in V-RFB as a separator.

Keywords

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