<p>A composite of molybdenum oxide and polyaniline (MoO<sub>3</sub>-PANI) was synthesised using an electrodeposition method. The morphology and structural characteristics of the MoO<sub>3</sub>-PANI composite were analysed using techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The electrochemical behaviour of the synthesised electrode was examined through cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) testing, and electrochemical impedance spectroscopy (EIS). The incorporation of a polyaniline coating in the MoO<sub>3</sub>-PANI composite enhances the electrochemical activity of MoO<sub>3</sub> while improving ion diffusion and electron transfer processes. The composite demonstrates a high specific capacitance of 683 mF/cm<sup>2</sup> at a scan rate of 5 mV/s in a 1 M H<sub>2</sub>SO<sub>4</sub> aqueous electrolyte, compared to pristine MoO<sub>3</sub> (203 mF/cm<sup>2</sup>), attributed to the synergistic interaction between its components. The EIS results also reveal reduced solution and charge transfer resistance, further confirming its superior electrochemical performance. With these attributes, the MoO<sub>3</sub>-PANI composite emerges as a highly promising electrode material for supercapacitor applications.</p>

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Electrochemical insights into MoO3-PANI composites for enhanced energy storage

  • Aruna R. Patil,
  • Anita K. Tawade,
  • Girish U. Kamble,
  • Kiran Kumar K. Sharma,
  • Jin H. Kim,
  • Dhanaji S. Dalavi

摘要

A composite of molybdenum oxide and polyaniline (MoO3-PANI) was synthesised using an electrodeposition method. The morphology and structural characteristics of the MoO3-PANI composite were analysed using techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The electrochemical behaviour of the synthesised electrode was examined through cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) testing, and electrochemical impedance spectroscopy (EIS). The incorporation of a polyaniline coating in the MoO3-PANI composite enhances the electrochemical activity of MoO3 while improving ion diffusion and electron transfer processes. The composite demonstrates a high specific capacitance of 683 mF/cm2 at a scan rate of 5 mV/s in a 1 M H2SO4 aqueous electrolyte, compared to pristine MoO3 (203 mF/cm2), attributed to the synergistic interaction between its components. The EIS results also reveal reduced solution and charge transfer resistance, further confirming its superior electrochemical performance. With these attributes, the MoO3-PANI composite emerges as a highly promising electrode material for supercapacitor applications.