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Abstract <p>Binary ZnWO<sub>4</sub>/CoWO<sub>4</sub> nanocomposite used as a supercapacitor electrode material was prepared by a simple hydrothermal method. Various analytical techniques such as Transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR), were employed to investigate their morphological and structural properties. By employing electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), we evaluated the electrochemical supercapacitive properties of ZnWO<sub>4</sub>/CoWO<sub>4</sub> nanocomposite. Powder XRD analysis confirmed that ZnWO<sub>4</sub>/CoWO<sub>4</sub> nanocomposite has a monoclinic crystalline structure with the average crystallite size is 14.66 nm. The FTIR spectra confirmed that the band at 814 cm<sup>–1</sup> is the stretching vibrations on Zn–O–W. The region at 588 and 465 cm<sup>–1</sup> attributed to the Zn–O group, whereas, the peak at 512 cm<sup>–1</sup> corresponds to Co–O. TEM image and SAED pattern showed that spherical-shaped with excellent crystalline nature of ZnWO<sub>4</sub>/CoWO<sub>4</sub> nanocomposite. The specific capacitance value for the prepared ZnWO<sub>4</sub>/CoWO<sub>4</sub> composite was 374 F/g with high retention of about 72.71% which was achieved after 1000 cycles. The present results demonstrate a&#xa0;method for generating pseudo capacitance in transition metal tungstate, as well as energy efficiency as a measure of pseudocapacitive material performance.</p>

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Hydrothermal Synthesis of Layered ZnWO4/CoWO4 Nanocomposites: A Novel Approach for High-Performance Supercapacitor Electrodes

  • 期刊论文

  • 发表日期：

    2025年7月14日

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  • Johnrose Arul Hency Sheela,
  • S. Sakthivel,
  • A. Dinesh,
  • B. Kabilan,
  • K. Rathika,
  • Manikandan Ayyar,
  • V. Mohanavel,
  • M. Santhamoorthy,
  • S. Santhoshkumar,
  • Y. Slimani,
  • M. A. Almessiere,
  • A. Baykal

摘要

Abstract

Binary ZnWO4/CoWO4 nanocomposite used as a supercapacitor electrode material was prepared by a simple hydrothermal method. Various analytical techniques such as Transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR), were employed to investigate their morphological and structural properties. By employing electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), we evaluated the electrochemical supercapacitive properties of ZnWO4/CoWO4 nanocomposite. Powder XRD analysis confirmed that ZnWO4/CoWO4 nanocomposite has a monoclinic crystalline structure with the average crystallite size is 14.66 nm. The FTIR spectra confirmed that the band at 814 cm–1 is the stretching vibrations on Zn–O–W. The region at 588 and 465 cm–1 attributed to the Zn–O group, whereas, the peak at 512 cm–1 corresponds to Co–O. TEM image and SAED pattern showed that spherical-shaped with excellent crystalline nature of ZnWO4/CoWO4 nanocomposite. The specific capacitance value for the prepared ZnWO4/CoWO4 composite was 374 F/g with high retention of about 72.71% which was achieved after 1000 cycles. The present results demonstrate a method for generating pseudo capacitance in transition metal tungstate, as well as energy efficiency as a measure of pseudocapacitive material performance.