Novel covalent-ionically cross-linked membranes with extremely low water swelling and methanol crossover for direct methanol fuel cell applications

Jing Wang, Chengji Zhao, Gang Zhang, Yang Zhang, Jing Ni, Wenjia Ma, Hui Na

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

In this paper, a sulfonated poly(arylene ether ketone) bearing carboxylic acid groups (C-SPEEK) was first synthesized. Then a new series of covalent-ionically cross-linked membranes using a poly(ether ether ketone) bearing amino groups (Am-PEEK) as a cross-linker were prepared for direct methanol fuel cell applications. Lower water swelling and lower methanol permeability membranes with higher mechanical strength were obtained via this covalent-ionically cross-linking method. The cross-linked network structure greatly improved the thermal and oxidative stability as compared to C-SPEEK membrane. The proton conductivity of C-SPEEK/Am-PEEKs was lower than that of non-cross-linked membrane, but its selectivity was higher. The properties of the cross-linked membranes in particular C-SPEEK/Am-PEEK-10 were investigated to confirm their potential applicability in fuel cells.

Original languageEnglish (US)
Pages (from-to)112-119
Number of pages8
JournalJournal of Membrane Science
Volume363
Issue number1-2
DOIs
StatePublished - Nov 2010

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

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