Insights into the energy storage mechanism of hybrid supercapacitors with redox electrolytes by Electrochemical Impedance Spectroscopy

摘要: Abstract Recently, new electrode materials and electrolytes for hybrid supercapacitors with enhanced performance have been extensively studied. However, the energy storage mechanism of these devices has not assessed in detail. In this sense, Electrochemical Impedance Spectroscopy is one most powerful techniques to better understand physicochemical phenomena involved kind supercapacitors. work, was used first time analyse non-aqueous organic redox molecules dissolved, as a function frequency bias voltage. addition, simple electrical model developed describe behavior supercapacitor very good correlation experimental results. This investigation provides useful information delving into which fundamental their future practical applications.