MoO_3- -deposited TiO₂ nanotubes for stable and high-capacitance supercapacitor electrodes

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Supercapacitors are crucial energy storage devices.
• Titanium dioxide (TiO2) nanotubes are promising electrode materials.
• Modifying TiO2 with electroactive materials can enhance performance.

Purpose of the Study:

• To develop a novel MoO3-/TiO2 nanotube composite for supercapacitors.
• To investigate the supercapacitive properties of the composite.
• To establish a facile fabrication method for high-performance electrodes.

Main Methods:

• Galvanostatic deposition technique for MoO3- deposition on TiO2 nanotubes.
• Thermal treatment in argon atmosphere (350-550 °C).
• X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) for material characterization.
• Electrochemical testing in 1 M Na2SO4 aqueous solution.

Main Results:

• Successful synthesis of MoO3-/TiO2 nanotube composite confirmed by XRD and XPS.
• The electrode prepared at 550 °C showed a specific capacitance of 23.69 mF cm-2 at 10 mV s-1.
• Excellent cycling stability with 86.6% capacitance retention after 1000 cycles.

Conclusions:

• The MoO3-/TiO2 nanotube composite is a high-performance electrode material for supercapacitors.
• The facile fabrication method offers a viable route for advanced energy storage solutions.
• This research contributes to the development of efficient and durable supercapacitor technology.