Fabrication and characterization of supported dual acidic ionic liquids for polymer electrolyte membrane fuel cell applications
| Autor: | Paveswari Sithambaranathan, Mikio Miyake, Arshad Ahmad, Mohamed Mahmoud Nasef, Ebrahim Abouzari-Lotf, Teo Ming Ting, Masoumeh Zakeri |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Chemistry
General Chemical Engineering Proton exchange membrane fuel cell 02 engineering and technology General Chemistry Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences lcsh:Chemistry chemistry.chemical_compound ETFE Membrane Chemical engineering lcsh:QD1-999 Nafion Ionic liquid Pyridinium 0210 nano-technology Alkyl sulfonate |
| Zdroj: | Arabian Journal of Chemistry, Vol 12, Iss 7, Pp 1011-1023 (2019) |
| ISSN: | 1878-5352 |
| Popis: | In this study, we proposed an innovative and versatile method for preparation of highly stable and conductive supported ionic liquid (IL) membranes for proton exchange fuel cell applications. Novel covalently supported dual acidic IL membranes were prepared by radiation induced grafting of 4-vinyl pyridine (4-VP) onto poly(ethylene-co-tetrafluoroethylene) (ETFE) film followed by post-functionalization via sequential treatments with 1,4-butane sultone and sulfuric acid to introduce pyridinium alkyl sulfonate/hydrogen sulfate moieties. The advantage of our approach lies in grafting polymers with highly reactive functional groups suitable for efficient post-sulfonation. The membranes displayed better swelling and mechanical properties compared to Nafion 112 despite having more than 3 times higher ion exchange capacity (IEC). The proton conductivity reached superior values to Nafion above 80 °C. Particularly, the membrane with ion exchange capacity of 3.41 displayed a proton conductivity of 259 mScm−1 at 95 °C. This desired conductivity value is attributed to the high IEC of the membranes as well as dissociation of the hydrophobic ETFE polymer and hydrophilic pyridinium alkyl sulfonate groups. Such appealing properties make the supported IL membranes promising for proton exchange membrane fuel cells (PEMFC). Keywords: Acidic ionic liquid, Proton exchange membrane, Radiation induced grafting, Fuel cells |
| Databáze: | OpenAIRE |
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