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Water mediated proton conduction in a sulfonated microporous organic polymer

Title data

Klumpen, Christoph ; Gödrich, Sebastian ; Papastavrou, Georg ; Senker, Jürgen:
Water mediated proton conduction in a sulfonated microporous organic polymer.
In: Chemical Communications. (2017) . - pp. 7592-7595.
ISSN 1364-548X
DOI: https://doi.org/10.1039/C7CC02117H

Abstract in another language

Polymer membranes (PEMs) within fuel cells (FCs) act as separators and efficient proton conducting electrolytes. Established systems tend to microphase separation into hydrophilic and hydrophobic regions{,} making these materials prone to water loss at elevated temperatures. Therefore{,} recent approaches utilize porous materials{,} which promise stronger interactions between water molecules and the framework{,} while still providing efficient conductive pathways. Here we show{,} that the microporous polymer PAF-1 exhibits proton conductivities up to 10-1 S cm-1 under hydrous conditions{,} after post-synthetic sulfonation. Gas phase sulfonation turned out to be the essential step for introducing a sufficiently large amount of -SO3H groups and thus a high charge carrier concentration upon hydration. While the absolute conductivity of the sulfonated frameworks strongly depends on the water uptake{,} we found similar activation barriers for all relative humidities. Since water is homogeneously stored in micro- and mesoporous voids{,} the activation barrier of the interpore conductivity is decisive for the macroscopic properties.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry III > Chair Anorganic Chemistry III - Univ.-Prof. Dr. Jürgen Senker
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Chair Physical Chemistry II - Univ.-Prof. Dr. Andreas Fery
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry III
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 30 Jun 2017 06:19
Last Modified: 21 Nov 2017 10:08
URI: https://eref.uni-bayreuth.de/id/eprint/38206