A thermally crosslinked multiblock sulfonated poly(arylene ether ketone nitrile) copolymer with a 1,2,3-triazole pendant for proton conducting membranesElectronic supplementary information (ESI) available: Characterization methods, 1H NMR spectra of O2, O1 and P1, FTIR spectra, tensile-strain tests, and the solubility of polymers. See DOI: 10.1039/c7ta10290a

A novel concept for the molecular design of a proton conducting membrane is proposed; this concept simultaneously implements strategies involving multiblock, thermally induced rearrangement and acid-base interaction. The complete synthesis involves oligomeric polycondensation, followed by the introd...

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Hauptverfasser: Hu, Huayuan, Dong, Tiandu, Sui, Yuqian, Li, Nanwen, Ueda, Mitsuru, Wang, Lianjun, Zhang, Xuan
Format: Artikel
Sprache:eng
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Zusammenfassung:A novel concept for the molecular design of a proton conducting membrane is proposed; this concept simultaneously implements strategies involving multiblock, thermally induced rearrangement and acid-base interaction. The complete synthesis involves oligomeric polycondensation, followed by the introduction of a 1,2,3-triazole side-chain via a click reaction, sulfonation and intermolecular dimerization, to generate a mechanically robust and chemically stable polymer membrane. The results of characterization demonstrate significant microphase separation of the crosslinked membrane due to morphological transformation, and that the presence of a large amount of weak-base pendants contributes to the enhancement of ion conductivity over the entire relative humidity range (30-95%). Moreover, it also generates power outputs as high as 1.07, 0.87 and 0.48 W cm −2 at 80 °C under 95%, 70% and 30% relative humidity conditions, respectively, which significantly improve the fuel cell performance by 34-40%, compared to the virgin membrane. In general, the results of this study suggest new synthetic pathways for high-performance ion-exchange membranes. A novel concept for the molecular design of a proton conducting membrane is proposed; this concept simultaneously implements strategies involving multiblock, thermally induced rearrangement and acid-base interaction.
ISSN:2050-7488
2050-7496
DOI:10.1039/c7ta10290a