Design, fabrication, and evaluation of a 5 F–5 V prototype of solid-state PANI based supercapacitor

A 5 F–5 V prototype of solid state supercapacitor based on polymer electrolyte (PANI) and XSPEEK composing of six single cells stacked in series has been fabricated. The scale-up from a small single cell to a larger stack prototype of a solid-state electrochemical supercapacitor is discussed in this paper. The developed prototype showed a higher series resistance than estimated in our previous study on individual cell supercapacitor. The fabricated prototype achieved a specific capacitance of 480 F/g. The assembled capacitor has been characterized by cyclic voltammetry, impedance spectroscopy and galvanostatic charging/discharging. The performances of the electrodes have been compared with that of the single cell electrodes of area 4 cm2.

Graphical abstractThe fabricated 5 F- 5V prototype of supercapacitor.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A 5 F–5 V prototype supercapacitor based on cross linked polymer electrolyte (PANI) and XSPEEK. ► Scale-up from a small single cell to a larger stack prototype of a solid-state supercapacitor. ► Shows a higher series resistance than estimated and achieved a specific capacitance of 480 F/g. ► A maximum capacitance of 4.67 F has been obtained for the device. ► Higher capacitance at very low frequencies of order of 0.01 F falling by 25% at 0.1 Hz.