Improved electrochemical performance of nanostructured Co3O4/Co3S4 composite for supercapacitor applications

초록

This study highlights the superior electrochemical performance of Co3O4/Co(3)S(4 )composite nanoparticles for supercapacitors, compared to individual Co(3)O(4)and Co3S4 , synthesized using sol-gel, co-precipitation, and mechanical alloying methods. The composite combines pseudocapacitance and electric double-layer capacitance, as evidenced by cyclic voltammetry. It exhibits a specific capacitance of 722.9 F/g at 0.5 A/g and an energy density of 73.8 Wh/kg at 405 W/kg. Electrochemical impedance spectroscopy reveals low charge transfer resistance and excellent cycling stability is achieved, with 98.5% capacitance retention after 1500 cycles. These results confirm the composite's potential for high-performance energy storage applications.

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