End-group cross-linked sulfonated poly(arylene ether sulfone) via thiol-ene click reaction for high-performance proton exchange membrane
| Autor: | Jong-Chan Lee, Junghwan Kim, Pilwon Heo, Jusung Han, Kihyun Kim |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Arylene Energy Engineering and Power Technology Proton exchange membrane fuel cell Ether 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Silsesquioxane 0104 chemical sciences Sulfone chemistry.chemical_compound End-group Membrane chemistry Polymer chemistry Click chemistry Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Power Sources. 401:20-28 |
| ISSN: | 0378-7753 |
| Popis: | End-group cross-linked sulfonated poly (arylene ether sulfone) (C-SPAES) membranes with varying degree of cross-linking density are prepared by in-situ casting and heating of thiol-terminated SPAES (SH-SPAES) solutions containing different amounts of multifunctional cross-linker such as acrylo-polyhedral oligomeric silsesquioxane (A-POSS) via thiol-ene click reaction. SH-SPAES is prepared by stepwise substitution reactions between phenoxide-terminated SPAES and end capping reagents such as decafluorobiphenyl followed by thiobisbenzethiol. The C-SPAES membranes exhibit vastly improved chemical and physical stability and mechanical strength compared with linear SPAES membrane due to effective cross-linked structure, and their proton conductivity values are higher than Nafion-212 in relative humidity range of 50–95% (at 90 °C) due to high degree of sulfonation (70 mol%) and ion exchange capacity (2.48 mequiv. g−1) of SH-SPAES. Under various operating conditions of proton exchange membrane fuel cell including intermediate temperature and low humidity conditions, membrane electrode assemblies employing the C-SPAES membranes with optimized cross-linker contents show outstanding cell performances (e.g., 1.08 W cm-2 at 0.5 V under 90 °C and 50% RH with 150 kPa). |
| Databáze: | OpenAIRE |
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