High-temperature water-free proton conducting membranes based on poly(arylene ether ketone) containing pendant quaternary ammonium groups with enhanced proton transport

Wenjia Ma, Chengji Zhao, Haidan Lin, Gang Zhang, Jing Ni, Jing Wang, Shuang Wang, Hui Na

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Poly(arylene ether ketone) containing pendant quaternary ammonium groups (QPAEKs) are anion-conducting polymers synthesized from benzylmethyl-containing poly(arylene ether ketone)s (PAEK-TM). Then QPAEK membranes doped with different concentrations of H3PO4 are prepared and evaluated as high temperature proton exchange membranes. The H3PO4 doping ability of quaternary ammonium groups in QPAEK system is found to be stronger than that of imidazole groups in polybenzimidazole system. The doping level of resulting QPAEK/H3PO4 composite membranes increases with both the concentration level of soaking H3PO 4 solution and the ion exchange capacity. For example, the highest doping level of composite membranes is 28.6, which is derived from QPAEK-5 with an ion exchange capacity of 2.02 mmol g-1 saturated with concentrated phosphoric acid. A strong correlation between the doping level and the proton conductivity is observed for all the membranes. Besides their low cost, novel high temperature proton exchange membranes, QPAEK/H3PO4, show really high proton conductivity and possess excellent thermal and mechanical stability, suggesting a bright future for applications in high temperature fuel cell.

Original languageEnglish (US)
Pages (from-to)9331-9338
Number of pages8
JournalJournal of Power Sources
Volume196
Issue number22
DOIs
StatePublished - Nov 15 2011

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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