Compositional effect on the properties of sulfonated and nonsulfonated polymer blend membranes for direct methanol fuel cell

Hyung Kyu Kim, Dong-Hwee Kim, Jisu Choi, Sung Chul Kim

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Various morphologies of blend membranes were prepared by changing drying condition and composition and their effect on the proton conductivity and the methanol crossover were discussed for direct methanol fuel cell. To obtain high proton conductivity but low fuel loss, highly sulfonated poly(arylene ether sulfone) (IEC=1.9 meq/g for sPAES55, synthesized with 55 mol% sulfonated monomer) was blended with nonsulfonated poly(ether sulfone) (IEC=0 meq/g for RH2000®, provided from Solvay) in solution blending manner. The blend ratio of sPAES55 and RH2000 was varied as 5 to 5, 6 to 4, 7 to 3, and 8 to 2 and three different temperatures (-42, -20, and 80 °C) were applied during the drying step to control the rate of phase separation. The effect of the blend ratio on the morphology, proton conductivity, and methanol permeability of the blend membrane was analyzed in combination with the drying process and finally the most desirable blend membrane for direct methanol fuel cell was proposed.

Original languageEnglish
Pages (from-to)928-942
Number of pages15
JournalMacromolecular Research
Volume19
Issue number9
DOIs
Publication statusPublished - 2011 Sep 1
Externally publishedYes

Keywords

  • blend membrane
  • blend ratio
  • direct methanol fuel cell
  • drying condition
  • phase separation

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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