<p>FeS and MoS₂ have attracted considerable interest owing to their advantageous electrochemical characteristics as electrode materials for supercapacitors. Nonetheless, the benefits of MoS₂ are constrained by insufficient cycle stability and conductivity. Conversely, FeS demonstrates commendable theoretical capacity and enduring electrical conductivity, rendering it a suitable candidate for composite electrodes. The FeS/MoS₂ composite exhibited a sheet-like morphology, with MoS₂ nanopetals uniformly adhered to the surface of each FeS/MoS₂ sheet via the positive charge of ferric sulfide. FeS and MoS₂ collaborate to generate a composite electrode exhibiting superior specific capacitance (991 Fg^⁻1 at 1 Ag^⁻1), excellent rate performance, and cyclic stability (75% retention after 10,000 cycles) at 5 Ag^⁻1 in 6&#xa0;M KOH. We employed an asymmetric supercapacitor (ASC) featuring activated carbon (AC) as the positive electrode and FeS/MoS₂ as the negative electrode. This resulted in an exceptional capacitance of 271 Fg^⁻1, an energy density of 53 Wh/kg, and a power density of 585 W/kg. The enhanced specific capacitance of the FeS/MoS₂ electrode may be ascribed to the synergistic interaction between Fe²⁺ and Mo⁴⁺ combine petals-like morphology of MoS₂ provides a substantial surface area for the FeS nanoplates, hence improving the conductivity and raising the efficacy of the composite FeS/MoS₂ electrode in electrochemical capacitors. Moreover, improved cycle performance was attained, suggesting a positive prospect for energy storage&#xa0;technology.</p> Graphical abstract <p></p>