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

Abstract

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 elec-trodes 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 elec-trochemical 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 morpho-logical 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 inter-facial properties of the NiCo2S4 on NGO/CMC surface via sonication-assisted hydrothermal reaction process. Therefore, the composite materials demonstrated excellent electrochemical properties for potential super -capacitor application via 3 M KOH as electrolyte.