Side-chain-type anion exchange membranes bearing pendent imidazolium-functionalized poly(phenylene oxide) for fuel cells
| Autor: | Ao Nan Lai, Qing Lin Liu, Yizhi Zhuo, Mei Ling Ye, Ai Mei Zhu, Chen Xiao Lin, Qiu Gen Zhang |
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| Rok vydání: | 2016 |
| Předmět: |
Alkaline fuel cell
Materials science Ion exchange Arylene Oxide Filtration and Separation 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry 0104 chemical sciences chemistry.chemical_compound Membrane chemistry Phenylene Polymer chemistry Side chain General Materials Science Thermal stability Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Membrane Science. 513:206-216 |
| ISSN: | 0376-7388 |
| DOI: | 10.1016/j.memsci.2016.04.054 |
| Popis: | A series of novel side-chain-type anion exchange membranes (AEMs) composed of poly (arylene ether sulfone)s backbone and pendent imidazolium-functionalized polyphenylene oxide (PPO) was prepared via chemical grafting, bromination, functionalization and alkalization. The chemical structure of the as-synthesized copolymers was confirmed by 1H NMR spectroscopy. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to observe the morphology of the AEMs. The densely functionalized side chains are found to be beneficial to the formation of ion clusters, as demonstrated by TEM. As a result, the hydroxide conductivity of the PAES-x-IMPPO membranes was 78.8 mS cm−1 at 80 °C. Moreover, the AEMs also exhibit robust mechanical properties, good thermal stability and reasonable alkaline stability. An open circuit voltage (0.98 V) of H2/O2 alkaline fuel cell using PAES-15-IMPPO at 60 °C can be an indicative of low fuel crossover. The maximum power density was 56.8 mW cm2 at a current density of 125 mA cm2 without optimization. |
| Databáze: | OpenAIRE |
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