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Preparation and properties of two-dimensional Ti2CTxMXene based on electroetching method
Ruixue Liu1, Sainan Wei2,3, Bao Shi2,3
1School of Materials Science and Engineering, Hebei University of Science and Technology, No.26, Yuxiang Road, Shijiazhuang, Hebei 050018, People's Republic of China.
Nanotechnology
|May 28, 2024
Summary
Researchers developed fluorine-free etched Ti2CTx MXene nanosheets on carbon fiber for flexible energy storage. This novel approach enhances electrochemical performance and environmental sustainability in wearable electronics.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- 2D MXenes are promising for energy storage due to unique properties.
- Fluorine-containing etching and nanosheet restacking limit MXene applications.
Purpose of the Study:
- To develop a fluorine-free synthesis of Ti2CTx MXene.
- To create flexible energy storage electrodes using Ti2CTx MXene on carbon fiber.
Main Methods:
- Selective electrochemical etching of Al from Ti2AlC in dilute HCl.
- Vertical growth of Ti2CTx MXene on carbon fiber (CF) substrates.
- Fabrication of flexible Ti2CTx@CF electrodes.
Main Results:
- Achieved a surface capacitance of 330 mF cm-2 at 1 mA cm-2 after 2000 cycles.
- Demonstrated 96.16% capacitance retention and high energy density (45.3 μWh cm-2).
- Electrodes are lightweight, thin, flexible, with efficient ion transport and charge storage.
Conclusions:
- The Ti2CTx@CF electrodes offer excellent electrochemical performance and stability.
- This fluorine-free method addresses environmental concerns in MXene production.
- The developed material is suitable for high-performance flexible energy storage devices.
