Electrochemical insights into MoO3-PANI composites for enhanced energy storage
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.