Title:	Charge Redistribution and Restoring voltage of Supercapacitors
Authors:	Kuparowitz, Tomáš Sedláková, Vlasta Szewczyk, Arkadiusz Hasse, Lech Smulko, Janusz
Citation:	Electroscope. 2014, č. 3, EDS 2014.
Issue Date:	2014
Publisher:	Západočeská univerzita v Plzni, Fakulta elektrotechnická
Document type:	článek article
URI:	http://147.228.94.30/images/PDF/Rocnik2014/Cislo3_2014/r8c3c5.pdf http://hdl.handle.net/11025/11821
ISSN:	1802-4564
Keywords:	elektrický náboj;superkapacitory;elektrická měření
Keywords in different language:	electric charge;supercapacitors;electrical measurements
Abstract in different language:	Electric charge in supercapacitor is stored on electrodes as well as inside its electrolyte. Charges on electrodes create Helmholtz double layer which is formed immediately with time constant in the order of seconds, while the storage of charge in electrolyte takes time in the order of hundreds of seconds. When the charged supercapacitor is briefly short-circuited, the charge on electrodes is discharged, however the charge in electrolyte remains mostly unchanged. The charge stored in electrolyte is redistributed by diffusion to the electrodes, until the charge on electrodes form electric field which acts against the charge concentration gradient and equilibrium state occursfor charge-carrier exchange at electrode/electrolyte interface. Supercapacitor capacitance value depends on the voltage of its terminals; with increasing voltage total capacitance increases.
Rights:	Copyright © 2014 Electroscope. All Rights Reserved.
Appears in Collections:	Číslo 3 (2014) Číslo 3 (2014)

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