Highly uniform nanocomposite through the decoration of MnS on graphitic carbon nitride as electrodes for symmetric supercapacitor

Abstract

Abstract The decoration of MnS on the graphitic carbon nitride (G-C3N4) is demonstrated through solvothermal synthesis, in which the MnS/G-C3N4 nanocomposite is formed. Under combustion at 300 oC for 5 min, the incorporation of MnO2 materials is obtained as a dopant material. The morphological properties are performed through the TEM and SEM analyses, in which a spherical-like nanocomposite is formed. The elemental and crystalline structures are confirmed using the XPS and XRD analyses. Testing this composite as a supercapacitor is performed through a (1.0 M) Na2SO4 electrolyte. This capacitor illustrates a specific capacitance (CS) of 43.5 F g−1 at 0.2 A g−1, while the energy value (E) is 8.6 W.h.kg−1. This capacitor has an excellent stability of 98.2% till 1000 cycles. The great stability of the supercapacitor till 1000 cycles confirms the ability of this supercapacitor to work well under the charge and discharge process for a long time.