Synthesis and substituent effect of polyether electrolyte membranes containing sulfofluorenyl groups

Yohei Chikashige, Kenji Miyatake, Masahiro Watanabe

Research output: Contribution to conferencePaper

Abstract

A new series of poly(arylene ether) ionomers containing sulfofluorenyl groups (SPE1-4) has been synthesized for the applications to polymer electrolyte fuel cells (PEFCs). The SPE-1 membrane shows high stability to heat, oxidation and hydrolysis, high mechanical stability, high proton conductivity and low gas permeation. In order to improve the proton conductivity at low relative humidity (RH), methyl groups substituted polyether ionomers SPE2-4 with higher IEC have been developed. The parent polyethers were synthesized by polycondensation and regioselectively substituted with sulfonic acid groups to give the title ionomers with the ion exchange capacity up to 3.26 meq/g. The SPE-4 (IEC = 3.26 meq/g) showed higher proton conductivity than that of Nafion at 80°C and 20 - 100% RH. The proton conductivity was durable over 10000 h at 100°C and 80% RH. These properties of the new ionomers seem promising as an electrolyte membrane for high temperature PEFCs.

Original languageEnglish
Pages4589-4590
Number of pages2
Publication statusPublished - 2006
Externally publishedYes
Event55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, Japan
Duration: 2006 Sep 202006 Sep 22

Other

Other55th Society of Polymer Science Japan Symposium on Macromolecules
CountryJapan
CityToyama
Period06/9/2006/9/22

Keywords

  • Fluorenyl groups
  • Fuel cell
  • Polyether
  • Polymer electrolyte
  • Proton conducting membrane
  • Sulfonic acid

ASJC Scopus subject areas

  • Engineering(all)

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