Highly porous cadmium oxide nanostructures tailored for high-performance supercapacitor applications
摘要
In this study, we report the synthesis of highly porous cadmium oxide nanostructures (CdO NSs) tailored for high-performance supercapacitor applications. Although CdO possesses promising physicochemical properties, its intrinsic limitation lies in its relatively low electrical conductivity, which restricts its practical use as a super capacitor electrode material. To address this challenge, we strategically engineered oxygen vacancies and incorporated silver (Ag) and activated carbon (AC) onto the CdO surface, effectively enhancing its electrical conductivity and electrochemical activity. The structural characterization of the synthesized CdO NSs revealed a highly porous framework with abundant active sites and well-defined diffusion pathways, facilitating efficient ion transport and charge storage during electrochemical processes. Electrodes fabricated from the optimized CdO-based composites, namely Ag@CdO and AC/Ag@CdO, exhibited an impressive specific capacitance of 752.55 F g⁻1 and outstanding cycling stability, retaining 98.53% of their initial capacitance after 1000 continuous charge–discharge cycles at a current density of 1 A g⁻1. These findings underscore their strong potential as robust and efficient electrodes for next-generation super capacitor devices. Furthermore, the facile synthesis route employed in this work offers a cost-effective and time-efficient alternative to complex fabrication procedures, eliminating the need for elaborate composite architectures while substantially improving the electrochemical performance of CdO-based materials. A series of multifunctional nanocomposites—CdO, Ag@CdO, and AC/Ag@CdO—were fabricated via a straightforward co-precipitation process and systematically characterized using XRD, FT-IR, UV-DRS, PL, FT-Raman, FE-SEM, HR-TEM, XPS, and EDX. XRD confirmed progressive by Aruna Subramanian https://doi.org/10.1007/s10854-025-15631-z