New insight into ion dynamics in nanoporous carbon materials: An application of the step potential electrochemical spectroscopy (SPECS) technique and electrochemical dilatometry

This paper reports on the charging mechanism of an activated carbon electrode in a symmetric electrochemical capacitor operating in an ionic liquid electrolyte (EMIm(+)TFSI(-)). With the application of step potential electrochemical spectroscopy (SPECS) and electrochemical dilatometry, it is determined that the electrical double-layer formation mechanism strongly depends on the porous structure of the electrode material. Furthermore, SPECS calculations allow us to separate and quantify the charge component responsible for the ionic movement. (C) 2021 The Authors. Published by Elsevier Ltd.

Automated summary

This study investigates the charging mechanism of an activated carbon electrode in an ionic liquid electrolyte, revealing that the electrical double-layer formation mechanism is strongly influenced by the porous structure of the electrode material. By utilizing SPECS calculations, the charge component responsible for ionic movement can be separated and quantified.