Fabrication of reduced graphene oxide encapsulated MnO2/MnS2 nanocomposite for high performance electrochemical devices

The electrochemical efficiency of multiple hybrid electrode substances, such as rGO/MnO2, rGO/MnS2, and rGO/MnO2/MnS2, is improved by adding rGO to MnS2 and MnO2. The developed composites are analyzed using SEM/EDX, TEM, XRD, XPS, and Raman methods. Cyclic voltammetry and galvanostatic measurements are utilized to investigate the specific capacitance and charge-discharge stability of the synthesized rGO/MnO2, rGO/MnS2, and rGO/MnO2/MnS2 electrode materials. When electrochemical performance is measured at 20 mV/s, rGO/MnO2/MnS2 performs better (650 F/g) than rGO/MnS2 (426 F/g), rGO/MnO2 (339 F/g), and rGO (155 F/g). The R-ct and R-f measurements of the rGO/MnO2/MnS2 electrode were determined to be 16.6 and 6.4 ohm cm(2), respectively. These values, which are smaller than those of the rGO electrode (89.7 ohm cm(2) and 67.5 ohm cm(2)), show that the rGO/MnO2/MnS2 displays a lesser impedance, which results in outstanding electrochemical characteristics. The capacity retention of this rGO/MnO2/MnS2 hybrid electrode is enhanced cycling stability, with a value of 97.69% up to 10,000 cycles at 1 A/g. The rGO/MnO2/MnS2 materials are estimated to have energy and power densities of 437 Wh/kg and 3146 W/kg, respectively. The rGO/MnO2/MnS2 combination is shown to be an excellent material for anodes in supercapacitors because of the beneficial relationship between MnS2, rGO, and MnO2. Greater area of surface, a quicker diffusion of ions route, excellent charge transfer, and-most significantly-increased rGO capacitance are among these benefits.