Hybrid TiO₂-RGO nanocomposite as high specific capacitance electrode for supercapacitor

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Supercapacitors are crucial for energy storage.
• Developing high-performance electrode materials is essential.
• Titanium dioxide (TiO2) and reduced graphene oxide (RGO) are promising materials.

Purpose of the Study:

• To fabricate and characterize TiO2-RGO composite electrodes.
• To evaluate their supercapacitive performance.
• To explore the synergistic effects of TiO2 and RGO.

Main Methods:

• Moderate-temperature hydrothermal synthesis of TiO2-RGO composites.
• Characterization using FE-SEM, XRD, FTIR, and UV-visible spectroscopy.
• Electrochemical evaluation via cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS).

Main Results:

• The TiO2-RGO composite exhibited a reduced bandgap (3.02 eV).
• Enhanced specific capacitance of 152 F g-1 was achieved at 25 mV s-1.
• Improved electrochemical and supercapacitive performance compared to bare TiO2.

Conclusions:

• TiO2-RGO composite electrodes show significant potential for supercapacitor applications.
• The combination of TiO2 and RGO enhances electrochemical properties.
• Hydrothermal method is effective for fabricating high-performance energy storage materials.