Supercapacitors - charge redistribution and restoring voltage

Tomas Kuparowitz; Vlasta Sedlakova; Arkadiusz Szewczyk; Lech Hasse; Janusz Smulko; Jiri Majzner; Petr Sedlak; Josef Sikula

Supercapacitors - charge redistribution and restoring voltage

Abstract

The charge in supercapacitor is stored on electrodes and in electrolyte. The charges on electrodes create the Helmholtz double layer which is formed immediately with time constant of the order of seconds, while the charge storage in electrolyte is going on with time constant of the order of hundreds seconds. When the charged supercapacitor is shorted for few seconds, the charge from electrodes is discharged while the charge in electrolyte remains mostly unchanged. The charge from electrolyte is redistributed by diffusion to the electrodes, until the charge on electrodes form the electric field which acts against the charge concentration gradient. Supercapacitor capacitance value depends on the voltage supercapacitor terminals; with increasing voltage total capacitance increases.

Authors (8)

Tomas Kuparowitz
- Brno University of Technology The Faculty of Electrical Engineering and Communication
Vlasta Sedlakova
- Brno University of Technology The Faculty of Electrical Engineering and Communication
Arkadiusz Szewczyk dr inż.
Lech Hasse dr inż.
Janusz Smulko prof. dr hab. inż.
Jiri Majzner
- Brno University of Technology The Faculty of Electrical Engineering and Communication
Petr Sedlak
- The Faculty of Electrical Engineering and Communication The Faculty of Electrical Engineering and Communication
Josef Sikula
- Brno University of Technology The Faculty of Electrical Engineering and Communication

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Category:: Conference activity
Type:: publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
Title of issue:: W : Electronic Devices and Systems EDS'14 IMAPS CS International Conference 2014 strony 145 - 150
Language:: English
Publication year:: 2014
Bibliographic description:: Kuparowitz T., Sedlakova V., Szewczyk A., Hasse L., Smulko J., Majzner J., Sedlak P., Sikula J.: Supercapacitors - charge redistribution and restoring voltage// W : Electronic Devices and Systems EDS'14 IMAPS CS International Conference 2014/ Brno, Czechy: Vysoke Uceni Technicke v Brne, 2014, s.145-150
Verified by:: Gdańsk University of Technology