<p>A major obstacle to the commercial viability of supercapacitors lies in enhancing the rate performance and capacitance of carbon-based electrodes. In this study, high-performance supercapacitor electrodes composed of Ti₃C₂Tₓ MXene and reduced graphene oxide (RGO) were successfully synthesized through a novel one-pot hydrothermal carbonization process, offering a simpler, more energy-efficient and environmentally friendly alternative to conventional multi-step or high-temperature synthesis routes. This green and scalable method minimizes the use of toxic solvents, reduces reaction time, and ensures uniform integration of MXene and RGO, thereby improving the overall material quality and electrochemical performance. The electrodes were characterized using X-ray diffraction (XRD), Scanning electron microscope (SEM), Fourier transform infrared (FTIR), X-ray photoelectron spectra (XPS) analyses. The Ti₃C₂Tₓ MXene/RGO hybrid demonstrated excellent durability and a high specific capacitance of 677 F g⁻¹ at 1 A g⁻¹ in 1&#xa0;M KOH, retaining 523 F g⁻¹ even at 5 A g⁻¹. The fabricated asymmetric supercapacitor (ASC) exhibited a capacitance of 148 F g⁻¹ at 1 A g⁻¹, a wide potential window of 1.6&#xa0;V, and a high energy density of 52.4 Whkg⁻¹ at a power density of 477 Wkg⁻¹. Additionally, the device maintained over 82% of its performance after 10,000 cycles. This work not only demonstrates a high-performance electrode design but also presents a sustainable pathway that can be extended to other MXene-based energy storage technologies.</p>