Engineering MXene/metal composites from MAX phase/metal-Al precursors for high-performance energy conversion and...

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Two-dimensional (2D) transition metal carbides (MXenes) are crucial for energy storage and conversion.
• Developing scalable synthesis methods for MXene-based composites is essential for practical applications.

Purpose of the Study:

• To present a novel, scalable method for synthesizing MXene/metal composites.
• To investigate the electrochemical properties of these composites for energy applications.

Main Methods:

• Direct etching of MAX phase/metal-Al alloy precursors.
• Synthesis of Ti3AlC2 MAX phase with metal alloys.
• Optimization of processing conditions for 3D porous architecture and mechanical integrity.

Main Results:

• Successful fabrication of MXene/metal composites with 3D porous architecture and good mechanical integrity.
• Demonstrated high electrochemical activity for the hydrogen evolution reaction (HER).
• Exhibited substantial areal capacitance, indicating suitability for energy storage.

Conclusions:

• The developed synthesis strategy is scalable and adaptable to various MAX phases and metal-Al alloys.
• Customizable MXene/metal composites with tailored nanostructures can be fabricated.
• These composites are promising for diverse electrochemical energy storage and conversion applications.