Novel sulfonated poly(ether ether ketone) with pendant benzimidazole groups as a proton exchange membrane for direct methanol fuel cells

Yang Zhang, Ke Shao, Chengji Zhao, Gang Zhang, Hongtao Li, Tiezhu Fu, Hui Na

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

A series of sulfonated poly(ether ether ketone)s bearing pendant carboxylic acid groups (C-SPEEKs) have been prepared and subsequently react with 1,2-diaminobenzene to obtain sulfonated poly(ether ether ketone)s with pendant benzimidazole groups (BI-SPEEKs). The expected structures of the sulfonated copolymers are confirmed by 1H NMR. The resulting copolymers all show good thermal and mechanical properties. It should be noted that the introduction of benzimidazole groups into the copolymer improves its thermal and oxidative stability obviously. Meanwhile, compared to C-SPEEK, BI-SPEEK membranes show much lower water uptake and methanol permeability with the same sulfonation degree (DS). In order to study morphological changes of C-SPEEK and BI-SPEEK membranes, hydrophilic domains sizes from an atomic force microscopy (AFM) are investigated.

Original languageEnglish (US)
Pages (from-to)175-181
Number of pages7
JournalJournal of Power Sources
Volume194
Issue number1
DOIs
StatePublished - Oct 20 2009

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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