Capacitive behavior of functionalized activated carbon-based all-solid-state supercapacitor

In this report, we incorporate activated carbon (AC) onto aluminum substrate via doctor blade method to produce an all-solid-state supercapacitor. The electrochemical properties of the all-solid-state supercapacitor were characterized by cyclic voltammetry and electrochemical impedance spectroscopy. Galvanostatic charge/discharge tests also were carried out to exhibit stability of the AC-based supercapacitor. The impedance and charge/discharge curves of the all-solid-state supercapacitor showed good capacitive behavior after functionalized AC. The highest specific capacitance obtained for the AC-based supercapacitor was 106 F g(-1). About 160% of specific capacitance increased after functionalization of the AC, which indicated that modification of the AC by nitric acid was able to introduce functional groups on the AC and improve its electrochemical performances.

Automated summary

This report presents the fabrication of an all-solid-state supercapacitor by incorporating activated carbon (AC) onto an aluminum substrate using the doctor blade method. The electrochemical properties of the AC-based supercapacitor were characterized through cyclic voltammetry and electrochemical impedance spectroscopy, showing good capacitive behavior after functionalization. The specific capacitance of the AC-based supercapacitor increased by about 160% after modification with nitric acid, indicating improved electrochemical performances.