Electrochemical Performance of Activated Carbon-NiCo₂O₄ as Candidate for Supercapacitor Electrode Materials

Abstract

Asymmetric supercapacitors have been fabricated using nanostructured AC// AC-NiCo2O4 composite electrodes. The aim was to determine the performance of a modified electrode based on AC as the anode and AC-NiCo2O4 as the cathode. NiCo2O4 has been successfully synthesized using the co-precipitation method. FTIR, XRD, and SEM characterized the material. The NiCo2O4 confirmed the crystalline structure assigned to cubic spinel with nanospheres morphologies. The electrochemical properties of the prepared composite electrodes and fabricated supercapacitor cells have been studied using charge-discharge (CD) and cyclic voltammetry (CV) in 1M Et4NBF4 as an electrolyte. The optimized composition is AC-NiCo2O4 (15%), exhibiting a superior power density of 42.56 W kg-1. These results showed that AC-NiCo2O4 material could be a great candidate as an active material for supercapacitors.