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<p>ZnO/NiO@ Plasma Treated Coconut Shell Activated Carbon (CSAC) composite was synthesized to enhance supercapacitor performance. Characterization techniques, including X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), Raman spectroscopy, Field Emission Scanning Electron Microscopy (FESEM), and Energy Dispersive X-ray Spectroscopy (EDS), confirmed its structural and chemical properties. XRD analysis showed crystallinity with nanocrystalline sizes of 16.52&#xa0;nm (ZnO) and 14.62&#xa0;nm (NiO). FTIR revealed oxygenated functional groups enhancing electrolyte interaction. XPS confirmed ZnO and NiO integration with peaks at 1021.4&#xa0;eV (Zn 2p3/2) and 853.1&#xa0;eV (Ni 2p3/2). Raman spectroscopy indicated structural modifications due to plasma treatment. FESEM images showed a highly porous morphology, while EDS confirmed elemental composition. Electrochemical tests demonstrated a high specific capacitance of 231.5 F/g at 1 A/g, with 82% retention at 10 A/g. The composite exhibited a high surface area of 264.795 m<sup>2</sup>/g, mesoporosity, and excellent electrochemical behavior, making it a promising candidate for efficient and stable supercapacitor applications.</p>

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Designing high-efficiency supercapacitors based on ZnO/NiO @ air plasma treated CSAC nanocomposites

  • 期刊论文

  • 发表日期：

    2025年10月28日

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  • R. Deepa,
  • K. A. Vijayalakshmi

摘要

ZnO/NiO@ Plasma Treated Coconut Shell Activated Carbon (CSAC) composite was synthesized to enhance supercapacitor performance. Characterization techniques, including X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), Raman spectroscopy, Field Emission Scanning Electron Microscopy (FESEM), and Energy Dispersive X-ray Spectroscopy (EDS), confirmed its structural and chemical properties. XRD analysis showed crystallinity with nanocrystalline sizes of 16.52 nm (ZnO) and 14.62 nm (NiO). FTIR revealed oxygenated functional groups enhancing electrolyte interaction. XPS confirmed ZnO and NiO integration with peaks at 1021.4 eV (Zn 2p3/2) and 853.1 eV (Ni 2p3/2). Raman spectroscopy indicated structural modifications due to plasma treatment. FESEM images showed a highly porous morphology, while EDS confirmed elemental composition. Electrochemical tests demonstrated a high specific capacitance of 231.5 F/g at 1 A/g, with 82% retention at 10 A/g. The composite exhibited a high surface area of 264.795 m2/g, mesoporosity, and excellent electrochemical behavior, making it a promising candidate for efficient and stable supercapacitor applications.