This study presents a comprehensive evaluation of FeS-W18O49 composite electrodes, revealing their exceptional performance for supercapacitor applications. Fabricated via a wet-chemical method, the FeS-W18O49 composites demonstrated a high specific capacitance of 558 F g-1 at a current density of 1 A g-1, showcasing their outstanding charge storage capabilities. The composites achieved an energy density of 89.77 W h kg-1 and a power density of 4950 W kg-1, attributed to the synergistic effect between the excellent electrical conductivity of FeS and the redox activity of W18O49, which collectively enhance the electrode's electrochemical performance. Moreover, the FeS-W18O49 electrodes exhibited remarkable cycling stability, retaining 87.6% of their capacitance after 10 000 charge-discharge cycles. These findings underscore the potential of FeS-W18O49 composites to advance supercapacitor technology by improving energy storage capacity and extending cycle life.
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