Synthesis of porous NiCo2O4/rGO nanocomposites via KBr porogen for supercapacitor applications

In this study, porous NiCo 2 O 4 /rGO nanocomposites were synthesized using potassium bromide (KBr) as a porogen via the co-precipitation method for supercapacitor electrodes. X-ray diffraction (XRD) confirmed the formation of pure NiCo 2 O 4 phase, while Fourier Transform Infrared (FTIR) analysis verified Ni-O, Co-O, and C-O bonds, confirming the successful integration of NiCo 2 O 4 and rGO. Morphology analysis showed anisotropic nanoparticles, demonstrating the influence of KBr on structural features. Among the studied compositions, the composite prepared with 0.05 mol KBr exhibited optimal porosity and the highest electrochemical performance, achieving a maximum specific capacitance of 1661.70 F g −1 at 0.5 A g −1 . The composite also showed low resistivity and retained 80.63% capacitance after 3000 charge-discharge cycles. These results demonstrate that the synergistic incorporation of rGO and KBr-induced porosity effectively enhances the electrochemical performance of NiCo 2 O 4 , highlighting its potential as an efficient supercapacitor electrode material.