Pyridine-poly(benzimidazole)s syntheses and high temperature PEMFC applications
碩士 === 元智大學 === 化學工程與材料科學學系 === 100 === In this study, four Pyr-PBIs and a PBI polymer were synthesized from 3,3-diaminobenzidine (DAB),2,6-pyridinedicarboxylic acid (PyA), and isophthalic acid (IPA) monomers. The mole ratios of monomers fed into polymerizations were:DAB/PyA/IPA=1/0.6/0.4 (Pyr-PBI-6...
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| Format: | Others |
| Language: | zh-TW |
| Online Access: | http://ndltd.ncl.edu.tw/handle/12375153858437634886 |
| Summary: | 碩士 === 元智大學 === 化學工程與材料科學學系 === 100 === In this study, four Pyr-PBIs and a PBI polymer were synthesized from 3,3-diaminobenzidine (DAB),2,6-pyridinedicarboxylic acid (PyA), and isophthalic acid (IPA) monomers. The mole ratios of monomers fed into polymerizations were:DAB/PyA/IPA=1/0.6/0.4 (Pyr-PBI-64);DAB/
PyA/IPA=1/0.5/0.5 (Pyr-PBI-55);DAB/PyA/IPA=1/0.4/0.6(Pyr-PBI-46);
DAB/PyA/IPA=1/0.3/0.7 (Pyr-PBI-37);and DAB/PyA/IPA=1/0/1 (PBI).
The membrane electrode assemblies (MEAs) were then prepared from these five H3PO4 doped membranes with Pt-C (Pt content 40 wt% on carbon powder support) catalyst, in which the Pt loadings were both 0.5 mg /cm2 at anode and cathode, and carried out fuel cell tests. The results showed that Pyr-PBI-55 and Pyr-PBI-46 had better fuel cell performance than PBI. It was attributed to the presence of PyA monomer in the Pyr-PBI membranes resulting a higher H3PO4 doping level and thus a better fuel cell performance.
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