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
Article, Bibliographie
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2021 |
| Creators: | Cymann-Sachajdak, Anita ; Graczyk-Zajac, Magdalena ; Trykowski, Grzegorz ; Wilamowska-Zawłocka, Monika |
| Type of entry: | Bibliographie |
| Title: | Understanding the capacitance of thin composite films based on conducting polymer and carbon nanostructures in aqueous electrolytes |
| Language: | English |
| Date: | 9 April 2021 |
| Publisher: | Elsevier |
| Journal or Publication Title: | Electrochimica Acta |
| Volume of the journal: | 383 |
| DOI: | 10.1016/j.electacta.2021.138356 |
| URL / URN: | https://www.sciencedirect.com/science/article/pii/S001346862... |
| 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. |
| Uncontrolled Keywords: | 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) |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids |
| Date Deposited: | 11 Jun 2021 06:11 |
| Last Modified: | 11 Jun 2021 06:11 |
| PPN: | |
| Projects: | Foundation for Polish Science, European Commission, Grant Number POIR.04.04.00-00-4582/17-00 |
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