Analytical expressions for electrochemical supercapacitor with potential dependent capacitance
| Autor: | R.N. Faria, A.P.R. Fernandez, E.A. Périgo |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Supercapacitor
Materials science Analytical expressions Renewable Energy Sustainability and the Environment business.industry Energy Engineering and Power Technology Hardware_PERFORMANCEANDRELIABILITY Applied potential Capacitance law.invention Capacitor Hardware_GENERAL law Electrochemical supercapacitors Hardware_INTEGRATEDCIRCUITS Optoelectronics Equivalent circuit Electrical and Electronic Engineering Cyclic voltammetry business |
| Zdroj: | Journal of Energy Storage. 43:103156 |
| ISSN: | 2352-152X |
| DOI: | 10.1016/j.est.2021.103156 |
| Popis: | Distinctly from ordinary capacitors which have a fixed capacitance, the capacitance of electrochemical supercapacitors is dependent on the applied potential. This feature introduces an additional complication to the analytical solution representing the supercapacitor circuit. Here a simplified equivalent circuit of electric double layer capacitors or electrochemical supercapacitors is proposed so that expressions evaluating the potential-dependent capacitance are derived considering short periods of charging and discharging process as in cyclic voltammetry carried out in a few minutes. Comparisons between such theoretical development and experimental cyclic voltammetry data – presenting a very good agreement – are presented and discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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