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Fabrication of TiO2-Nanotube-Array-Based Supercapacitors
Faheem Ahmed1, Syed A Pervez2, Abdullah Aljaafari3
1Department of Physics, College of Science, King Faisal University, P.O. Box-400, Al-Ahsa 31982, Saudi Arabia. fahmed@kfu.edu.sa.
Micromachines
|November 6, 2019
Summary
Titanium dioxide (TiO2) nanotube arrays were synthesized using a cost-effective electrochemical method for supercapacitor electrodes. These TiO2 nanotubes exhibit excellent electrochemical performance and stability, indicating their potential for commercial supercapacitor applications.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Supercapacitors are crucial energy storage devices.
- Developing efficient and cost-effective electrode materials is essential for advancing supercapacitor technology.
- Titanium dioxide (TiO2) is a promising material for energy storage applications due to its properties.
Purpose of the Study:
- To synthesize TiO2 nanotube arrays using a simple and cost-effective electrochemical anodization technique.
- To investigate the structural and morphological properties of the synthesized TiO2 nanotube arrays.
- To evaluate the electrochemical performance of TiO2 nanotube arrays as electrodes for supercapacitors.
Main Methods:
- Electrochemical anodization of a Ti current collector in an electrolyte containing lactic acid.
- Characterization of TiO2 nanotube arrays using X-ray diffraction (XRD) and transmission electron microscopy (TEM).
- Electrochemical performance evaluation using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge/discharge (GCD) measurements.
Main Results:
- TiO2 nanotube arrays with high aspect ratio were successfully grown and adhered to the Ti substrate.
- XRD and TEM confirmed the anatase phase and nanotubular morphology (approx. 16 nm length, 80 nm diameter).
- Supercapacitor cells demonstrated a high specific capacitance (5.12 mF/cm² at 100 mV/s), excellent cycling stability (>250 cycles), and remarkable rate capability (88% capacitance retention at 500 mV/s).
Conclusions:
- The electrochemical anodization method provides a viable route for producing TiO2 nanotube arrays for supercapacitors.
- The synthesized TiO2 nanotube arrays exhibit excellent electrochemical properties, making them suitable for high-performance supercapacitors.
- These findings highlight the potential of TiO2 nanotube arrays as cost-effective electrode materials for commercial supercapacitor applications.
