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High-strength scalable MXene films through bridging-induced densification
Sijie Wan1,2, Xiang Li1, Ying Chen3
1School of Chemistry, Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, P. R. China.
Science (New York, N.Y.)
|September 30, 2021
Summary
We developed a method to densify titanium carbide MXene films, removing voids to enhance mechanical strength and electrical conductivity. This breakthrough enables high-performance, scalable MXene films for applications like electromagnetic interference shielding.
Area of Science:
- Materials Science
- Nanotechnology
- Solid State Chemistry
Background:
- MXenes, a class of 2D transition metal carbides/nitrides, are promising for flexible electromagnetic interference (EMI) shielding.
- Voids in titanium carbide MXene films compromise mechanical and electrical properties, limiting their practical applications.
Purpose of the Study:
- To develop a method for densifying MXene films by eliminating structural voids.
- To improve the mechanical reliability, electrical conductivity, and EMI shielding capabilities of titanium carbide MXene films.
Main Methods:
- Sequential bridging using hydrogen and covalent bonding agents to induce film densification.
- Characterization of the densified MXene films for mechanical, electrical, and shielding properties.
Main Results:
- Achieved highly compact MXene films through void removal via sequential bridging.
- Demonstrated high tensile strength and toughness in the densified films.
- Exhibited enhanced electrical conductivity and electromagnetic interference shielding effectiveness.
Conclusions:
- The sequential bridging method effectively densifies MXene films, overcoming limitations posed by structural voids.
- The resulting high-performance MXene films are scalable and suitable for advanced applications.
- This approach offers a pathway for creating high-performance films from various two-dimensional materials.
