Cross-linked membranes with a macromolecular cross-linker for direct methanol fuel cells

Gang Zhang, Hongtao Li, Wenjia Ma, Liyuan Zhang, Christopher M. Lew, Dan Xu, Miaomiao Han, Yang Zhang, Jing Wu, Hui Na

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


With the goal of reducing water swelling and methanol permeability in sulfonated proton exchange membranes (PEM), bromomethylated poly(ether ether ketone) was synthesized and used as a macromolecular cross-linker. The cross-linking reaction was performed at 195°C for 5 h and resulted in cross-linked membranes with high cross-linked density. Compared to the pristine membrane, the cross-linked membranes displayed greatly reduced water uptake and methanol permeability. Other properties of the cross-linked membranes, including proton conductivity, mechanical properties, and oxidative stability, were also investigated and compared with the pristine membrane. All the results indicated that the novel macromolecular cross-linker and the resulting cross-linked membranes are promising for fuel cell applications.

Original languageEnglish (US)
Pages (from-to)5511-5518
Number of pages8
JournalJournal of Materials Chemistry
Issue number14
StatePublished - Apr 14 2011

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Materials Chemistry


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