| Download | - View accepted manuscript: Blend membranes consisting of sulfonated poly(ether ether ketone) and polysulfone bearing 4-nitrobenzimidazole for direct methanol fuel cells (PDF, 992 KiB)
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| DOI | Resolve DOI: https://doi.org/10.1149/1.3040242 |
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| Author | Search for: Li, W.; Search for: Fu, Y.Z.; Search for: Manthiram, A.; Search for: Guiver, M.D. |
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| Format | Text, Article |
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| Abstract | Low-cost blend membranes consisting of sulfonated poly(ether ether ketone) (SPEEK) (an acidic polymer) and polysulfone-4-nitrobenzimidazole (PSf-NBIm) (a basic polymer) have been prepared with various PSf-NBIm contents (0-5.0 wt %) and characterized by ion-exchange capacity, proton conductivity, and water uptake measurements. The blend membranes with PSf-NBIm contents of 2.5 and 5.0 wt % show higher proton conductivity and lower water uptake in water and methanol/water solutions at a given temperature than plain SPEEK. The blend membranes also exhibit better electrochemical performance and lower methanol crossover in a direct methanol fuel cell than plain SPEEK and Nafion 115 membranes due to an enhancement in proton conductivity through acid-base interactions and an insertion of the benzimidazole side groups into the ionic clusters of SPEEK, as indicated by small-angle X-ray scattering. The maximum power density of the blend membrane with a PSf-NBIm content of 2.5 wt % is 1.5 times higher than that of the Nafion 115 in 1 M methanol solution at 80 C. |
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| Publication date | 2009 |
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| In | |
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| Language | English |
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| NRC number | NRCC 50900 |
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| NPARC number | 1884314 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | d2d3a2a2-bf6d-44c7-af07-1ed38453feaa |
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| Record created | 2009-10-02 |
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| Record modified | 2020-04-16 |
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