Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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Proton Conducting Membrane Based on Crosslinked Sulfonated Polyimide for Direct Methanol Fuel Cell

  • Sung, Kyung-A (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Wan-Keun (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology) ;
  • Oh, Keun-Hwan (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology) ;
  • Choo, Min-Ju (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology) ;
  • Park, Jung-Ki (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology)
  • Published : 2009.08.28
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Abstract

Crosslinked membrane based on sulfonated polyimide was prepared by the introduction of crosslinkable monomer in polymerization process and crosslinking during membrane casting. Crosslinked membranes showed different properties from non-crosslinked membranes. Crosslinking decreased methanol crossover and therefore unit cell using crosslinked membrane showed increased open circuit voltage, 0.81 V, in comparison with unit cell using noncrosslinked membrane, 0.71 V. In addition, water uptake of crosslinked membrane, 40.5%, was lower than that of non-crosslinked membrane, 57.0%, and this resulted in improved dimensional stability. However, proton conductivity of crosslinked membranes showed rather low relative to non-crosslinked membrane due to reduced water uptake.

Keywords

References

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