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Crosslinked sulfonated poly(arylene ether sulfone)/silica hybrid membranes for high temperature proton exchange membrane fuel cells

Author

Listed:
  • Chun, Jeong Hwan
  • Kim, Sang Gon
  • Lee, Ji Young
  • Hyeon, Dong Hun
  • Chun, Byung-Hee
  • Kim, Sung Hyun
  • Park, Ki Tae

Abstract

Sulfonated poly(arylene ether sulfone) copolymer is synthesized via nucleophilic step polymerization of sulfonated 4,4′-dichlorodiphenyl sulfone, 4,4′-dichlorodiphenyl sulfone and phenolphthalin monomers in the presence of potassium carbonate. The copolymer is blended with various amounts of silica particles to form organic–inorganic composite membranes. Esterification reaction is carried out between silica particles and the sulfonated polymer chains by thermal treatment in the presence of sodium hypophosphite, which catalyzed the esterification reaction. The composition and incorporation of the sulfonated repeat unit are confirmed by 1H NMR. The water uptake, proton conductivity, and thermal decomposition temperature of the membranes are measured. The silica content in the polymer matrix and the effect of esterification are evaluated. All composite membranes show better water uptake and proton conductivity than the unmodified membrane. Moreover, the membranes are tested in a commercial single cell at 80 °C and 120 °C in humidified H2/air under different relative humidity conditions. The composite membrane containing 10% (w/w) silica shows the best performance among the prepared membranes especially under high temperature and low humidity conditions.

Suggested Citation

  • Chun, Jeong Hwan & Kim, Sang Gon & Lee, Ji Young & Hyeon, Dong Hun & Chun, Byung-Hee & Kim, Sung Hyun & Park, Ki Tae, 2013. "Crosslinked sulfonated poly(arylene ether sulfone)/silica hybrid membranes for high temperature proton exchange membrane fuel cells," Renewable Energy, Elsevier, vol. 51(C), pages 22-28.
    • Handle: RePEc:eee:renene:v:51:y:2013:i:c:p:22-28
    DOI: 10.1016/j.renene.2012.09.005
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    Cited by:

    1. Neelakandan, S. & Kanagaraj, P. & Nagendran, A. & Rana, D. & Matsuura, T. & Muthumeenal, A., 2015. "Enhancing proton conduction of sulfonated poly (phenylene ether ether sulfone) membrane by charged surface modifying macromolecules for H2/O2 fuel cells," Renewable Energy, Elsevier, vol. 78(C), pages 306-313.
    2. Muthumeenal, A. & Neelakandan, S. & Kanagaraj, P. & Nagendran, A., 2016. "Synthesis and properties of novel proton exchange membranes based on sulfonated polyethersulfone and N-phthaloyl chitosan blends for DMFC applications," Renewable Energy, Elsevier, vol. 86(C), pages 922-929.

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