Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Characterization Study on Nafion$^{(R)}$/$ZrO_2-TiO_2$ Composite Membranes for PEMFC Operation at High Temperature and Low Humidity

고온/저가습 PEMFC 운전을 위한 Nafion$^{(R)}$/$ZrO_2-TiO_2$ 복합 전해질 막의 특성 연구

  • Park, Ki-Tae (Department of Chemical and Biological Engineering, Korea University) ;
  • Chun, Jeong-Hwan (Department of Chemical and Biological Engineering, Korea University) ;
  • Choi, Dong-Woong (Department of Chemical and Biological Engineering, Korea University) ;
  • Kim, Sung-Hyun (Department of Chemical and Biological Engineering, Korea University)
  • 박기태 (고려대학교 화공생명공학과) ;
  • 전정환 (고려대학교 화공생명공학과) ;
  • 최동웅 (고려대학교 화공생명공학과) ;
  • 김성현 (고려대학교 화공생명공학과)
  • Received : 2010.11.04
  • Accepted : 2011.02.18
  • Published : 2011.02.28
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Abstract

[ $ZrO_2-TiO_2$ ]binary oxides with various Zr:Ti molar ratios were prepared by sol-gel method and Nafion$^{(R)}$/$ZrO_2-TiO_2$ composite membranes were fabricated for proton exchange membrane fuel cells (PEMFCs) at high temperature and low humidity. Water uptake, Ion exchange capacity (IEC), and proton conductivity of Nafion$^{(R)}$/$ZrO_2-TiO_2$ composite membranes were characterized and these composite membranes were tested in a single cell at $120^{\circ}C$ with various relative humidity (R.H.) conditions. The obtained results were compared with the unmodified membranes (Nafion$^{(R)}$ 112 and Recast Nafion$^{(R)}$). A Nafion$^{(R)}$/$ZrO_2-TiO_2$ composite membrane with 1:3 of Zr:Ti molar ratio showed the highest performance. The performance showed 500 mW/$cm^2$ (0.499V) at $120^{\circ}C$, 50% R. H., and 2 atm.

Keywords

References

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