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<p>Supercapacitors have emerged as a promising energy storage technology due to their exceptional power density and rapid charging/discharging rates. Thin film electrodes offer a promising approach to enhance the performance of supercapacitors. This research focuses on the development of high-performance supercapacitor electrodes using thin film cobalt oxide (Co<sub>3</sub>O<sub>4</sub>). The material deposited on SS substrate using different reagents by hydrothermal method. The structural and morphological properties of the Co<sub>3</sub>O<sub>4</sub> thin films were characterized using X- Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infra-Red Spectroscopy (FTIR), RAMAN, and X-Ray photoelectron spectroscopy (XPS) techniques. The electrochemical properties of the Co<sub>3</sub>O<sub>4</sub> thin films were characterized using Cyclic Voltammetry (CV), Galvanostatic Charge-Discharge (GCD), and Electrochemical Impedance Spectroscopy (EIS) techniques. The results showed that the Co<sub>3</sub>O<sub>4</sub> thin films exhibit a high specific capacitance 1412.2 F/g, and excellent cycling stability of 93.74% up to 2000 cycles. This study demonstrates the potential of thin film Co<sub>3</sub>O<sub>4</sub> electrodes for high-performance supercapacitors, enabling applications in energy storage, electric vehicles, and renewable energy systems.</p>

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Hydrothermal synthesis and electrochemical investigations of Co₃O₄ thin film for energy storage supercapacitor application.

  • 期刊论文

  • 发表日期：

    2026年2月11日

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  • Girija P. Mahamuni,
  • Priya G. Gaikwad,
  • Shriniwas B. Kulkarni

摘要

Supercapacitors have emerged as a promising energy storage technology due to their exceptional power density and rapid charging/discharging rates. Thin film electrodes offer a promising approach to enhance the performance of supercapacitors. This research focuses on the development of high-performance supercapacitor electrodes using thin film cobalt oxide (Co3O4). The material deposited on SS substrate using different reagents by hydrothermal method. The structural and morphological properties of the Co3O4 thin films were characterized using X- Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infra-Red Spectroscopy (FTIR), RAMAN, and X-Ray photoelectron spectroscopy (XPS) techniques. The electrochemical properties of the Co3O4 thin films were characterized using Cyclic Voltammetry (CV), Galvanostatic Charge-Discharge (GCD), and Electrochemical Impedance Spectroscopy (EIS) techniques. The results showed that the Co3O4 thin films exhibit a high specific capacitance 1412.2 F/g, and excellent cycling stability of 93.74% up to 2000 cycles. This study demonstrates the potential of thin film Co3O4 electrodes for high-performance supercapacitors, enabling applications in energy storage, electric vehicles, and renewable energy systems.