<p>The development of advanced electrode materials for supercapacitors is a rapidly evolving field, driven by the global demand for efficient and sustainable energy storage solutions. The incorporation of reduced graphene oxide (rGO) with oxides and sulfides offers a potential approach to synthesizing new generation electrode materials for supercapacitors. This approach integrates the specific electronic characteristics of sulfides with the high electrical conductivity and mechanical stability of rGO. In this study, four distinct composites were synthesized using the solvothermal method: a binary composite of molybdenum disulfide and zinc oxide (MoS₂/ZnO) and three rGO-modified variants with 3, 6, and 9% rGO weight percentages, namely MZR-I, MZR-II, and MZR-III. The hexagonal structure of the prepared composites was further supported by X-ray diffraction analysis, and the field emission scanning electron microscopy images suggested a porous surface morphology that was a direct function of the incorporation of rGO. Energy-dispersive X-ray spectroscopy confirmed the presence of a minor level of impurities in the synthesized composites. A detailed electrochemical characterization revealed that CV plots showed clear redox peaks typical of a battery-type system. In GCD tests, specific capacitance and discharge time increased with increasing rGO concentration. The calculated energy and power densities also strengthened the results, showing that the MZR-III sample was more efficient than the other samples. Electrochemical impedance spectroscopy further confirmed the decrease in the resistance when rGO was incorporated. MZR-III possessed improved electrochemical properties with a specific capacity of 464 C g⁻¹ (867F g⁻¹) at 0.8 A g⁻¹. Further, MZR-III possessed an energy density of 109.5 Wh kg⁻¹ at a power density of 680 W kg⁻¹ at a current density of 0.8 A g⁻¹, and maintained about 85.01% of its initial capacitance which established it as a high-performance electrode material for supercapacitors.</p>