Journal
SUSTAINABLE ENERGY & FUELS
Volume 4, Issue 12, Pages 6066-6074Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0se01123a
Keywords
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Funding
- Natural Science Foundation of China [51603031]
- Fundamental Research Funds for the Central Universities of China [N2005026]
- Liaoning Provincial Natural Science Foundation of China [20180550871, 2020-MS-087, 20180550192]
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Developing high temperature proton exchange membranes (HT-PEMs) with high conductivity and mechanical strength simultaneously is a considerable challenge for the HT-PEM fuel cell (HT-PEMFC). Herein, a 1-(3-aminopropyl)imidazole (APIm) functionalized low-cost poly(vinyl chloride) (PVC) membrane (PVC-APIm) with superior phosphoric acid (PA) doping content and high proton conductivity is synthesized via a gentle and facile method with no need for the chloromethylation procedure. The poly(ether ketone cardo) (PEK-C) polymer is blended with PVC-APIm to provide sufficient mechanical robustness. Interestingly, blending PEK-C not only improves the mechanical stability, but also increases the PA doping content of membranes. As a result, PA doped PVC-APIm/x%PEK-C membranes possess increased tensile strength and upgraded conductivity simultaneously. The PVC-APIm/10%PEK-C/166%PA membrane exhibits a low area swelling of 45%, high conductivity of 0.132 S cm(-1) at 180 degrees C and suitable tensile strength of 11.8 MPa at room temperature. The single cell performance of this membrane demonstrates the technical feasibility of the PVC-APIm/x%PEK-C/PA membrane for the HT-PEMFC.
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