Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 7, Issue 21, Pages 13275-13283Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta00028c
Keywords
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Funding
- National Natural Science Foundation of China [21476031, 51303017, U1607127, 21576030]
- Natural Science Research of Jiangsu Higher Education Institutions [18KJA430004, 17KJA430002]
- Priority Academic Program Development of Jiangsu Higher Education
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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.
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