Voltage Dependence of Supercapacitor Capacitance

• Autorzy: Szewczyk A. , Sikula J. , Sedlakova V. , Majzner J. , Sedlak P. , Kuparowitz T.

Identyfikatory

DOI

10.1515/mms-2016-0031

• Języki publikacji: EN

Abstrakty

EN

Electronic Double-Layer Capacitors (EDLC), called Supercapacitors (SC), are electronic devices that are capable to store a relatively high amount of energy in a small volume comparing to other types of capacitors. They are composed of an activated carbon layer and electrolyte solution. The charge is stored on electrodes, forming the Helmholtz layer, and in electrolyte. The capacitance of supercapacitor is voltage- dependent. We propose an experimental method, based on monitoring of charging and discharging a supercapacitor, which enables to evaluate the charge in an SC structure as well as the Capacitance-Voltage (C-V) dependence. The measurement setup, method and experimental results of charging/discharging commercially available supercapacitors in various voltage and current conditions are presented. The total charge stored in an SC structure is proportional to the square of voltage at SC electrodes while the charge on electrodes increases linearly with the voltage on SC electrodes. The Helmholtz capacitance increases linearly with the voltage bias while a sublinear increase of total capacitance was found. The voltage on SC increases after the discharge of electrodes due to diffusion of charges from the electrolyte to the electrodes. We have found that the recovery voltage value is linearly proportional to the initial bias voltage value.

Słowa kluczowe

EN

Electronic Double-Layer Capacitor (EDLC); charge diffusion; recovery voltage

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2016
• Tom: Vol. 23, nr 3
• Strony: 403--411
• Opis fizyczny: Bibliogr. 11 poz., rys., wykr.

Twórcy

autor

Szewczyk A.

• Gdańsk University of Technology, Faculty of Electronics, Telecommunications and Informatics, Narutowicza 11/12, 80-233 Gdańsk, Poland

autor

Sikula J.

• Brno University of Technology, Central European Institute of Technology, Technicka 10, Brno 616 00, Czech Republic

autor

Sedlakova V.

• Brno University of Technology, Central European Institute of Technology, Technicka 10, Brno 616 00, Czech Republic

autor

Majzner J.

• Brno University of Technology, Central European Institute of Technology, Technicka 10, Brno 616 00, Czech Republic

autor

Sedlak P.

• Brno University of Technology, Central European Institute of Technology, Technicka 10, Brno 616 00, Czech Republic

autor

Kuparowitz T.

• Brno University of Technology, Central European Institute of Technology, Technicka 10, Brno 616 00, Czech Republic

Bibliografia

• [1] Sedlakova, V., Sikula, J., Majzner, J., Sedlak, P., Kuparowitz, T., Buergler, B., Vasina, P. (2015). Supercapacitor equivalent electrical circuit model based on charges redistribution by diffusion. J. Power Sources, 286, 58-65.
• [2] Sharma, P., Bhatti, T.S. (2010). A review on electrochemical double-layer capacitors. Energy Convers. Manag., 51, 2901-12.
• [3] Zubieta, L., Bonert, R. (2000). Characterization of double-layer capacitors for power electronics applications. IEEE Trans. Ind. Appl., 36, 199-205.
• [4] Belhachemi, F., Rael, S., Davat, B. (2000). A physical based model of power electric double-layer supercapacitors. Conference Record of the 2000 IEEE Industry Applications Conference, 5, 3069-76.
• [5] Faranda, R. (2010). A new parameters identification procedure for simplified double layer capacitor twobranch model. Electr. Power Syst. Res., 80, 363-71.
• [6] Torregrossa, D., Bahramipanah, M., Namor, E., Cherkaoui, R., Paolone, M. (2014). Improvement of Dynamic Modeling of Supercapacitor by Residual Charge Effect Estimation. IEEE Trans. Ind. Electron., 61, 1345-54.
• [7] Graydon, J.W., Panjehshahi, M., Kirk, D.W. (2014). Charge redistribution and ionic mobility in the micropores of supercapacitors. J. Power Sources, 245, 822-9.
• [8] Kaus, M., Kowal, J., Sauer, D.U. (2010). Modelling the effects of charge redistribution during self-discharge of supercapacitors. Electrochimica Acta, 55, 7516-23.
• [9] Devillers, N., Jemei, S., Péra, M-C., Bienaimé, D., Gustin, F. (2014). Review of characterization methods for supercapacitor modelling. J. Power Sources, 246, 596-608.
• [10] Kuparowitz, T., Sedláková, V., Szewczyk, A., Hasse, L., Smulko, J. (2014). Charge Redistribution and Restoring voltage of Supercapacitors. Electroscope, 2014, 1-7.
• [11] Ike, I.S., Sigalas, I., Iyuke, S., Ozoemena, K.I. (2015) An overview of mathematical modeling of electrochemical supercapacitors/ultracapacitors. J. Power Sources, 273, 264-77.

Uwagi

EN

Research described in this paper was financed by the National Sustainability Program under grant LO1401. In the research, the SIX Center infrastructure was used.

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).