Structural and electrochemical properties of NiCo₂S₄@N-doped graphene oxide/carboxy methyl cellulose interface composite for supercapacitor electrode materials

Recently, the graphene-carboxy methyl cellulose (GO-CMC) materials were fabricated as bio-medical, biosensors and supercapacitor applications. The fabrication of NiCo₂S₄@NGO and NiCo₂S₄@NGO/CMC composite electrodes was prepared via sonication assisted hydrothermal reaction for supercapacitor application. The as-prepared composite materials were described using FTIR, Raman, XRD, XPS, SEM, and SEM–EDX analysis. The composite results were confirmed structural, morphological, and surface properties to enhance the electrochemical properties for supercapacitor application. The resultant composite materials showed improved specific capacitance (493 and 767 F/g at 2 A/g), high-rate capability, and excellent cycling stability and capacity retention (5000 cycles with 95.1 %). Due to the surface and interfacial properties, the structural and morphological properties of NiCo₂S₄@NGO and NiCo₂S₄@NGO/CMC composite improved the specific capacitances and cyclic stability for supercapacitor application. The electrochemical properties were enhanced due to the interfacial properties of the NiCo₂S₄ on NGO/CMC surface via sonication-assisted hydrothermal reaction process. Therefore, the composite materials demonstrated excellent electrochemical properties for potential supercapacitor application via 3 M KOH as electrolyte.