Bis-imidazolium based poly(phenylene oxide) anion exchange membranes for fuel cells: The effect of cross-linking

Bencai Lin, Fei Xu, Fuqiang Chu, Yurong Ren, Jianning Ding, Feng Yan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

75 Citations (Scopus)


In the present work, a series of poly(phenylene oxide) (PPO) based uncross-linked and cross-linked anion exchange membranes (AEMs) with bis-imidazolium cations were synthesized and characterized. Compared with cross-linked AEMs, uncross-linked membranes with similar ion exchange capacities showed a much higher water uptake and swelling degree. Cross-linked membranes showed vastly improved alkaline stability, oxidation stability and mechanical properties compared with uncross-linked membranes due to the effective cross-linked structure, and a well-developed hydrophilic/hydrophobic phase separated morphology was observed for cross-linked membranes by atomic force microscopy (AFM). A single cell with a cross-linked membrane (Cross-Im-PPO-75) showed a maximum power density of 212.45 mW cm-2. Considering the enhanced alkaline stability and mechanical properties, the cross-linked PPO membranes with bis-imidazolium cations are promising AEM materials for alkaline exchange membrane fuel cells.

Original languageEnglish
Pages (from-to)13275-13283
Number of pages9
JournalJournal of Materials Chemistry A
Issue number21
Publication statusPublished - 7 Jun 2019
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)


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