Abstract
This study presents the synthesis and electrochemical application of MoS2 nanopetals/SnO2 quantum dots (MS/SQD) nanocomposites. Employing a hydrothermal method for MoS2 and a simple mixing process for SnO2 using thiourea and tin chloride dihydrate, we engineered a nanocomposite that significantly enhances supercapacitor performance. Characterization through XRD, FE-SEM, FE-TEM, and XPS confirmed the optimal morphology and structural integrity of the MS/SQD. Electrochemical evaluations using a three-electrode system highlighted the nanocomposite’s exceptional electrochemical attributes: it achieved a specific capacitance of up to 505 F·g−1 at 1 A·g−1 and maintained 350 F·g−1 at a high current density of 10 A·g−1, with nearly 99% capacity retention after 5,000 cycles. The novelty lies in the synergistic effects of SnO2 quantum dots, which enhance the MoS2 nanopetal’s structural integrity, conductivity, and electrochemical reactivity, thereby improving charge transfer efficiency and ion diffusion. These findings underscore the MS/SQD nanocomposite’s potential for high-performance energy storage applications.
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