Current trends in supercapacitor technology (principially in lowering series discharge resistance) have promoted the devices into roles parallel to, or replacing traditional batteries. In cases where power consumption is low, supercapacitors are an attractive alternative, completely eliminating batteries and further offering higher surge currents. This opens the path towards powering mobile switching circuits, or with high-consumption for short periods.
To power such circuits, the arrangement’s limits need to be observed, respectively what can supercapacitors off in terms of series resistance, self-discharge (parallel) resistance and capacitance.
One of the methods used to determine the after mentioned parameters is Electrochemical Impedance Spectroscopy (EIS).
In the present study we show the determinations on 3 supercapacitors, of 5F, 10 F and 22 F respectively. This is a study seldom published, most EIS determinations being in the range up to 1 F and we feel that EIS determinations for higher capacitances should be known to the community.
Title: Investigation of Supercapacitor’s Impedance Based on Spectroscopic Measurements
Author(s): Rodica Negroiu, Paul Svasta, Ciprian Ionescu, Alexandru Vasile
Organisation(s): University “Politehnica” of Bucharest, Romania, Center of Technological Electronics and Interconnection Techniques, UPB-CETTI
Symposium: 1st PCNS Passive Components Networking Days, 12-15th Sep 2017, Brno, Czech Republic
Reference: paper 3.2. Supercapacitors Session., PCNS2017 Proceedings Pg.56-62
ISBN: 978-80-905 768-8-9
e-Sessions Scope Components: Capacitors
e-Sessions Topics: Measurement & Test
read the full paper in pdf here.