Composites Based on Polyaniline and Activated IR-Pyrolyzed Polyacrylonitrile As Promising Supercapacitor Electrode Materials
| Autor: | Mikhail N. Efimov, G. P. Karpacheva, D. G. Muratov, G. V. Nikolaeva, O. N. Efimov, Nadezhda N. Dremova, V. V. Abalyaeva |
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| Rok vydání: | 2020 |
| Předmět: |
Supercapacitor
General Chemical Engineering Composite number Polyacrylonitrile 02 engineering and technology General Chemistry Electrolyte engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Capacitance 0104 chemical sciences chemistry.chemical_compound chemistry Coating Electrode Polyaniline engineering Composite material 0210 nano-technology |
| Zdroj: | Russian Journal of Applied Chemistry. 93:1667-1674 |
| ISSN: | 1608-3296 1070-4272 |
| DOI: | 10.1134/s1070427220110063 |
| Popis: | A method has been developed for synthesis of a composite coating based on polyaniline by introducing dispersed IR-pyrolyzed polyacrylonitrile, activated by alkaline treatment, into a polymer matrix. The coating is applied from a suspension in formic acid onto a graphite foil that has been previously subjected to anodic etching to improve the wettability with an electrolyte. The produced composite electrodes for sulfuric acid supercapacitors demonstrate high stability during long-term cycling. The specific electrochemical capacitance was 0.89 F cm–2, which is more than 2 times higher than that for an electrode with a polyaniline coating (0.41 F cm–2) tested under the same conditions. The main contribution to the increase in the total capacitance is made by the double-layer capacitance due to the rise in the active electrode surface. |
| Databáze: | OpenAIRE |
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