Cymann-Sachajdak, Anita ; Graczyk-Zajac, Magdalena ; Trykowski, Grzegorz ; Wilamowska-Zawłocka, Monika (2021)
Understanding the capacitance of thin composite films based on conducting polymer and carbon nanostructures in aqueous electrolytes.
In: Electrochimica Acta, 383
doi: 10.1016/j.electacta.2021.138356
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
In this work electrochemical performance of thin composite films consisted of poly(3,4-ethylenedioxythiophene) (PEDOT), graphene oxide (G0x) and oxidized multiwalled carbon nanotubes (oxMWCNTs) is investigated in various sulphates (Li2SO4, Na2SO4, K2SO4, MgSO4) and acidic (H2SO4) electrolytes. Capacitance values, rate capability and cycling stability achieved for the composite layers are correlated with the electrolytes' properties such as the conductivity, viscosity, cation size and pH. The highest capacitance values are achieved in acidic solution (98.6 mF cm(-2) at 1 mA cm(-2)), whereas cycling stability is better in neutral electrolytes (88.4% of initial capacitance value after 10'000 cycles recorded for symmetric supercapacitor in 0.5 M MgSO4 solution). Diffusion controlled and non-diffusion controlled capacitance contributions are calculated and the results are discussed considering various ranges of sweep rates taken into account in the linear fitting and extrapolation of parameters.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Cymann-Sachajdak, Anita ; Graczyk-Zajac, Magdalena ; Trykowski, Grzegorz ; Wilamowska-Zawłocka, Monika |
| Art des Eintrags: | Bibliographie |
| Titel: | Understanding the capacitance of thin composite films based on conducting polymer and carbon nanostructures in aqueous electrolytes |
| Sprache: | Englisch |
| Publikationsjahr: | 9 April 2021 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Electrochimica Acta |
| Jahrgang/Volume einer Zeitschrift: | 383 |
| DOI: | 10.1016/j.electacta.2021.138356 |
| URL / URN: | https://www.sciencedirect.com/science/article/pii/S001346862... |
| Kurzbeschreibung (Abstract): | In this work electrochemical performance of thin composite films consisted of poly(3,4-ethylenedioxythiophene) (PEDOT), graphene oxide (G0x) and oxidized multiwalled carbon nanotubes (oxMWCNTs) is investigated in various sulphates (Li2SO4, Na2SO4, K2SO4, MgSO4) and acidic (H2SO4) electrolytes. Capacitance values, rate capability and cycling stability achieved for the composite layers are correlated with the electrolytes' properties such as the conductivity, viscosity, cation size and pH. The highest capacitance values are achieved in acidic solution (98.6 mF cm(-2) at 1 mA cm(-2)), whereas cycling stability is better in neutral electrolytes (88.4% of initial capacitance value after 10'000 cycles recorded for symmetric supercapacitor in 0.5 M MgSO4 solution). Diffusion controlled and non-diffusion controlled capacitance contributions are calculated and the results are discussed considering various ranges of sweep rates taken into account in the linear fitting and extrapolation of parameters. |
| Freie Schlagworte: | Composite electrode materials, Conducting polymer, Graphene oxide, Carbon nanotubes, Electrolytes, Electrochemical capacitors, Pseudocapacitive Contributions, Electrochemical Performance, Energy-Storage, TIO2 Anatase, Ionic-Radii, Hydration, Supercapacitors, Nanotubes, Transport, Poly(3,4-Ethylenedioxythiophene) |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| Hinterlegungsdatum: | 11 Jun 2021 06:11 |
| Letzte Änderung: | 11 Jun 2021 06:11 |
| PPN: | |
| Projekte: | Foundation for Polish Science, European Commission, Grant Number POIR.04.04.00-00-4582/17-00 |
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