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<p>This study reports the synthesis of a novel ZnO nanostructure with a flower petal morphology using surfactant-assisted and sonochemical techniques. The ultrasonic treatment of precursors enabled the self-assembly of ZnO nanoparticles into highly porous, interconnected structures. Structural characterization via powder X-ray diffraction confirmed the presence of the wurtzite ZnO phase with distinct diffraction peaks at 2θ values of 31.4°, 34.1°, 36.0°, 47.2°, 56.3°, 62.6°, and 67.7°. Fourier transform infrared spectroscopy identified characteristic Zn–O and Zn-OH vibrational modes at 510 and 704&#xa0;cm<sup>−1</sup>, respectively. Scanning electron microscope images revealed well-defined flower petal-like architectures with increased surface roughness, enhancing electrochemical activity. The synthesized ZnO structures exhibited specific capacitances of 89.94 Fg<sup>−1</sup> (N2/GS) and 95.92 Fg<sup>−1</sup> (N3/GS) at a scan rate of 5&#xa0;mV/s. The N3/GS electrode demonstrated a remarkable rate capability of 68% at 5 A/g, highlighting its superior charge storage stability. Furthermore, the asymmetric supercapacitor based on N3/GS showcased high specific capacitance, power density, and retention, underscoring its potential for advanced energy storage applications.</p>

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Tailoring ZnO nanomaterials with flower morphology for supercapacitors application

  • 期刊论文

  • 发表日期：

    2025年3月15日

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  • A. Nichelson,
  • P. Ram Kumar,
  • Fathiah Kamarulazam,
  • M. Pershaanaa,
  • K. Ramesh,
  • S. Ramesh

摘要

This study reports the synthesis of a novel ZnO nanostructure with a flower petal morphology using surfactant-assisted and sonochemical techniques. The ultrasonic treatment of precursors enabled the self-assembly of ZnO nanoparticles into highly porous, interconnected structures. Structural characterization via powder X-ray diffraction confirmed the presence of the wurtzite ZnO phase with distinct diffraction peaks at 2θ values of 31.4°, 34.1°, 36.0°, 47.2°, 56.3°, 62.6°, and 67.7°. Fourier transform infrared spectroscopy identified characteristic Zn–O and Zn-OH vibrational modes at 510 and 704 cm−1, respectively. Scanning electron microscope images revealed well-defined flower petal-like architectures with increased surface roughness, enhancing electrochemical activity. The synthesized ZnO structures exhibited specific capacitances of 89.94 Fg−1 (N2/GS) and 95.92 Fg−1 (N3/GS) at a scan rate of 5 mV/s. The N3/GS electrode demonstrated a remarkable rate capability of 68% at 5 A/g, highlighting its superior charge storage stability. Furthermore, the asymmetric supercapacitor based on N3/GS showcased high specific capacitance, power density, and retention, underscoring its potential for advanced energy storage applications.