Analyses of scanning electrochemical microscopy and electrochemical impedance spectroscopy in direct methanol fuel cells: permeability resistance and proton conductivity of polyaniline modified membrane
| Autor: | A. El Guerraf, J.I. Martins, Rongguang Wang, András Kiss, S. Ben Jadi, Mohammed Bazzaoui, A. El Azrak, El Arbi Bazzaoui |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Infrared spectroscopy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Dielectric spectroscopy chemistry.chemical_compound Scanning electrochemical microscopy Membrane chemistry X-ray photoelectron spectroscopy Chemical engineering Nafion Polyaniline Electrochemistry General Materials Science Electrical and Electronic Engineering Cyclic voltammetry 0210 nano-technology |
| Zdroj: | Journal of Solid State Electrochemistry. 24:1551-1565 |
| ISSN: | 1433-0768 1432-8488 |
| DOI: | 10.1007/s10008-020-04659-2 |
| Popis: | Nafion 112/polyaniline (Na/PANi) composite membranes were synthesized by chemical polymerization of aniline on the perfluorinated structure for use in direct methanol fuel cells as a solid electrolyte. The morphology and physicochemical properties of the composite membranes were analyzed by scanning electron microscopy (SEM), attenuation Fourier reflection infrared spectroscopy (FTIR-ATR), and X-ray photoelectron spectroscopy (XPS). The electrochemical properties of the membranes were investigated by scanning electrochemical microscopy (SECM), electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV). The results show that PANi-modified Nafion during 1 and 24 h decrease the methanol crossover by 78% and 89% and increase the proton conductivity by 17% and 2.6% respectively. |
| Databáze: | OpenAIRE |
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