Abstract: As a promising electrochemical energy storage device, supercapacitors have received extensive attention in recent years. Due to the narrow potential window of the water-based electrolytic supercapacitor has limited the improvement of its energy density. Herein, polypyrrole and MoS2 were loaded in situ on porous carbon matrix by chemical oxidation polymerization and solvothermal method respectively, and these two kinds of composites were assembled as positive and negative electrodes respectively to assemble asymmetric supercapacitors. The two electrode materials were analyzed by scanning electron microscope (SEM) and X-ray diffraction spectrum (XRD). The successful preparation of the two composites was further confirmed by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). Electrochemical tests showed that the specific capacitances of MoS₂ and PPy loaded on porous carbon electrodes were 373.4 F/g and 160.6 F/g, respectively. When an asymmetric supercapacitor was assembled, the potential window could expand to 1.6 V and an energy density of 20.1 Wh/kg at a power density of 395 W/kg were achieved.