Novel cross-linked sulfonated poly (arylene ether ketone) membranes for direct methanol fuel cell |
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Authors: | Chengji Zhao Haidan LinHui Na |
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Affiliation: | Alan G. MacDiarmid Institute, College of Chemistry, Jilin University, Changchun, Jilin 130012, PR China |
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Abstract: | To prepare a cross-linked proton exchange membrane with low methanol permeability and high proton conductivity, poly (vinyl alcohol) is first blended with sulfonated poly (arylene ether ketone) bearing carboxylic acid groups (SPAEK-C) and then heated to induce a cross-linking reaction between the carboxyl groups in SPAEK-C and the hydroxyl groups in PVA. Fourier transform infrared spectroscopy is used to characterize and confirm the structure of SPAEK-C and the cross-linked membranes. The proton conductivity of the cross-linked membrane with 15% PVA in weight reaches up to 0.18 S cm−1 at 80 °C (100% relative humidity), which is higher than that of Nafion membrane, while the methanol permeability is nearly five times lower than Nafion. The ion-exchange capacity, water uptake and thermal stability are investigated to confirm their applicability in fuel cells. |
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Keywords: | Sulfonated poly (arylene ether ketone) Proton exchange membrane Cross-linking Fuel cell Poly (vinyl alcohol) |
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