Anion exchange membranes based on carbazole-containing polyolefin for direct methanol fuel cells
| Autor: | Qiu Gen Zhang, Ke Zhou, Qing Lin Liu, Ao Nan Lai, Ai Mei Zhu, Yizhi Zhuo, Mei Ling Ye |
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| Rok vydání: | 2016 |
| Předmět: |
Ion exchange
Carbazole Analytical chemistry Filtration and Separation 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry 0104 chemical sciences Polyolefin chemistry.chemical_compound Membrane Chemical engineering chemistry Transmission electron microscopy General Materials Science Thermal stability Methanol Physical and Theoretical Chemistry 0210 nano-technology Methanol fuel |
| Zdroj: | Journal of Membrane Science. 497:99-107 |
| ISSN: | 0376-7388 |
| DOI: | 10.1016/j.memsci.2015.08.069 |
| Popis: | A series of anion exchange membranes was prepared from the copolymer of 1-vinyl imidazole and N-vinyl carbazole for direct methanol fuel cells (DMFCs). The structure of the membranes was studied using 1H NMR, scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), and small angle X-ray scattering (SAXS). The thermal stability of the membranes was characterized by thermo-gravimetric analysis (TGA). The ion conductivity, methanol permeability, ionic exchange capacity (IEC), water uptake, swelling ratio, and alkaline stability of the membranes were investigated. It is found that the ion conductivity of the membranes varied from 9.34×10−2 to 20.28×10−2 S cm−1 in deionized (DI) water and the methanol permeability varied from 4.5×10−8 to 12.3×10−8 cm2 s−1 at 30 °C. All the as-prepared membranes are stable in a 1.0 M KOH solution at 60 °C for 1400 h due to the polyolefin backbone. A methanol/O2 single cell evaluation exhibited an open circuit voltage of 0.93 V and peak power density of 125.8 mW cm−2. Therefore, the as-prepared membranes have great potential for application in alkaline fuel cells. |
| Databáze: | OpenAIRE |
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