Issue 11, 2017

Thiocyanates as attractive redox-active electrolytes for high-energy and environmentally-friendly electrochemical capacitors

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.

Graphical abstract: Thiocyanates as attractive redox-active electrolytes for high-energy and environmentally-friendly electrochemical capacitors

Supplementary files

Article information

Article type
Paper
Submitted
02 Feb 2017
Accepted
16 Feb 2017
First published
16 Feb 2017

Phys. Chem. Chem. Phys., 2017,19, 7923-7935

Thiocyanates as attractive redox-active electrolytes for high-energy and environmentally-friendly electrochemical capacitors

B. Gorska, P. Bujewska and K. Fic, Phys. Chem. Chem. Phys., 2017, 19, 7923 DOI: 10.1039/C7CP00722A

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