Sulfonated poly(arylene ether sulfone) ionomers containing fluorenyl groups for fuel cell applications

Byungchan Bae, Kenji Miyatake, Masahiro Watanabe*


研究成果: Article査読

61 被引用数 (Scopus)


A series of sulfonated poly(arylene ether sulfone)s (SPEs) containing fluorenyl groups as bulky components were synthesized and characterized for fuel cell applications. Introduction of disodium 3,3′-disulfo-4,4′-difluorophenyl sulfone (SFPS) monomer gave ionomers with high acidity and accordingly high proton conductivity as well as high proton diffusion coefficient (Dσ) at low humidity. The membrane of SPE60 (where the number denotes mole percentage of the component containing sulfonic acid groups; IEC (ion exchange capacity) = 1.68 mequiv./g) exhibited high proton conductivity of 4.6 × 10-3 S/cm at 40% RH and 80 °C, which is one order of magnitude higher than that (6 × 10-4 S/cm) of our previous SPE (SPE-1, IEC = 1.58 mequiv./g). Dσ of SPE60 membrane was ca. 4 times higher than that of the SPE-1 membrane at low water volume fraction. SPE membranes showed good oxidative and hydrolytic stability as well as favorable thermal and mechanical properties. Small-angle X-ray scattering analyses showed that the phase separation of SPE membranes was much less developed than that of the perfluorinated Nafion membrane which accounts for lower hydrogen and oxygen permeability of the former membranes.

ジャーナルJournal of Membrane Science
出版ステータスPublished - 2008 3月 5

ASJC Scopus subject areas

  • 生化学
  • 材料科学(全般)
  • 物理化学および理論化学
  • ろ過および分離


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