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Updated: Mar 6, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
Thiocyanates as attractive redox-active electrolytes for high-energy and environmentally-friendly electrochemical
Barbara Gorska1, Paulina Bujewska1, Krzysztof Fic1
1Institute of Chemistry and Technical Electrochemistry Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland. Krzysztof.Fic@put.poznan.pl.
Abstract:
This manuscript reports on the novel insight into the development of high voltage carbon/carbon electrochemical capacitors operating in aqueous solutions of alkali metals and ammonium thiocyanates (KSCN, NaSCN, LiSCN, and NH4SCN). The effect of salt concentration, electrode porosity and current collectors on the capacitance value, system stability, and power performance has been investigated. Therefore, thiocyanate-based electrolytes were recognized as cheap and highly conductive electrolytic solutions (up to 401 mS cm-1 for NH4SCN at RT) allowing a cell voltage of 1.6 V in a symmetric carbon/carbon system to be achieved. At the same time, they display an attractive redox activity, enhancing the energy of the device with a good performance during cycling.
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