Synthesis and characterization of anion-exchange multi-block-copolymer membranes containing highly densified cationic functional groups
| Autor: | Farid Wijaya, Adam F. Nugraha, Dong Won Shin, Mutya Rahmah Arbi, Byungchan Bae, Hye Jin Lee |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Polymers and Plastics
Ion exchange Organic Chemistry Arylene Cationic polymerization Ether 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Membrane chemistry Chemical engineering Materials Chemistry Copolymer Chemical stability 0210 nano-technology |
| Zdroj: | Polymer. 210:122996 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/j.polymer.2020.122996 |
| Popis: | Alkaline polymer electrolytes based on an aromatic quaternized poly (arylene ether) (QPE) multi-block copolymer with highly densified cationic functional groups were prepared for alkaline membrane fuel cell (AMFC) applications. Three different cationic groups, namely trimethylammonium (QPE-TMA), piperidinium (QPE-Pip), and quinuclidinium (QPE-Qui), were introduced to evaluate the effect of cations on membrane electrochemical properties. The hydroxide-ion conductivity of QPE-TMA (53.3 mS cm−1 in water at 25 °C) was much higher than that of a commercial Fumatech membrane, although the corresponding ion-exchange capacity values were similar. Moreover, the relative humidity–dependent anion conductivity and water uptake capacity of QPE-TMA membranes exceeded those of the commercial membrane. Long-term chemical stability was probed by monitoring anion conductivity upon the immersion of membranes in 1 M NaOH and was highest for QPE-TMA. Moreover, at 70 °C, the AMFC single-cell performance of QPE-TMA (331 mW cm−2) was superior to that of the Fumatech membrane (208 mW cm−2). |
| Databáze: | OpenAIRE |
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