Proton-conducting membranes based on benzimidazole-containing sulfonated poly(ether ether ketone) compared with their carboxyl acid form

Hongtao Li, Jing Wu, Chengji Zhao, Gang Zhang, Yang Zhang, Ke Shao, Dan Xu, Haidan Lin, Miaomiao Han, Hui Na

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

A series of sulfonated poly(ether ether ketone) containing pendant carboxyl (C-SPEEKs) have been synthesized using a nucleophilic polycondesation reaction. A condensation reaction between 1,2-diaminobenzene and carboxyl resulted in a new series of copolymers containing benzimidazole groups (SPEEK-BIms). The expected structures of the sulfonated copolymers are confirmed by 1H NMR. The dependence of ion exchange capacity, water uptake, proton conductivity and methanol diffusion coefficient of SPEEK-BIm membranes has been studied and compared with their carboxyl acid form. The results suggest that the introduction of benzimidazole groups may be responsible for many excellent properties of the membranes for fuel cell. It is noticeable that the markedly improved oxidative stability is benefit for the application of membrane.

Original languageEnglish (US)
Pages (from-to)8622-8629
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume34
Issue number20
DOIs
StatePublished - Oct 1 2009

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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