Proton Conductive Polyimide Electrolytes Containing Fluorenyl Groups:  Synthesis, Properties, and Branching Effect

DOI Web Site 被引用文献8件
  • Kenji Miyatake
    Clean Energy Research Center, University of Yamanashi, 4 Takeda, Kofu 400-8510, Japan
  • Hua Zhou
    Clean Energy Research Center, University of Yamanashi, 4 Takeda, Kofu 400-8510, Japan
  • Masahiro Watanabe
    Clean Energy Research Center, University of Yamanashi, 4 Takeda, Kofu 400-8510, Japan

書誌事項

公開日
2004-05-22
DOI
  • 10.1021/ma0495487
公開者
American Chemical Society (ACS)

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説明

Novel sulfonated polyimide copolymers as electrolytes for high-temperature fuel cell applications are reported. A series of sulfonated polyimide copolymers (SPIH-X; X refers to molar percentage of fluorenyl content) containing 0−60 mol % of fluorenyl groups as hydrophobic component were synthesized, of which electrolyte properties were investigated and compared to those of the perfluorinated ionomer (Nafion 112). High-molecular-weight copolymers with good film-forming capability were obtained. Thermal stability with decomposition temperature of ca. 280 °C and no glass transition temperature was confirmed for the copolymers. SPIH shows unique water uptake behavior with the maximum value of 57 wt % at X = 30. Water molecules absorbed in the electrolyte membrane with this specific composition do not evaporate easily so that the high proton conductivity of 1.67 S cm-1 was obtained at 120 °C and 100% RH. The branching and cross-linking of SPIH-30 were carried out by applying 2 mol % of trifunctional monomer (m...

収録刊行物

  • Macromolecules

    Macromolecules 37 (13), 4956-4960, 2004-05-22

    American Chemical Society (ACS)

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