Improved electrochemical performance of Fe3O4/TiO2 composite thin film electrode for energy storage applications.

This study is the first attempt to examine the electrochemical properties of TiO 2 composite with Fe 3 O 4 thin film. In our analysis, X-Ray diffraction (XRD) confirms the formation of Fe 3 O 4 on TiO 2. Fourier Transform Infrared Spectroscopy (FT-IR) and Raman spectroscopy confirmed the functional groups. The UV–Vis spectroscopy analysis shows that the addition of Fe 3 O 4 results in decrease in optical band gap. Our Cyclic Voltammetry (CV) results demonstrate that, under steady state conditions, the behaviors of TiO 2 and Fe 3 O 4 /TiO 2 electrodes regarding ion adsorption and charge transmission vary. Pseudocapacitive effects and charge transfer affects the functionality of the TiO 2 electrode, whereas two-layer capacitance effects primarily control the response of the Fe 3 O 4 /TiO 2 electrode. Numerous factors, including ion diffusion, rate capability, charge transfer, and series resistance, can be directly determined using electrochemical impedance spectroscopy (EIS). The experimental results and analysis presented in this work brings to light the significance of Fe 3 O 4 in the electrochemical response of an electrode-electrolyte interface. [ABSTRACT FROM AUTHOR]