In-Situ Synergistic 2D/2D MXene/BCN Heterostructure for Superlative Energy Density Supercapacitor with Super-Long...

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• 2D/2D layered materials show promise for supercapacitors due to their structural and electrochemical properties.
• MXene and boron carbon nitride (BCN) are key materials in energy storage research.

Purpose of the Study:

• To develop a facile and scalable synthesis method for 2D/2D MXene/BCN heterostructures.
• To investigate the electrochemical performance of the synthesized heterostructure for supercapacitor applications.

Main Methods:

• Facile scalable synthesis of 2D/2D MXene/BCN heterostructure via direct pyrolysis.
• Characterization of the heterostructure's structural and electrochemical properties.
• Fabrication and testing of a solid-state supercapacitor device.

Main Results:

• The synthesis resulted in BCN nanosheets grown in-situ on MXene surfaces, forming an interconnected conductive network.
• The MXene/BCN electrode achieved a high specific capacitance of 1173 F g⁻¹ at 2 A g⁻¹.
• The solid-state device demonstrated 100% capacitive retention after 100,000 cycles, indicating excellent stability.

Conclusions:

• The developed MXene/BCN heterostructure exhibits excellent electrochemical properties, including high capacitance and stability.
• This material presents a promising avenue for advanced energy storage applications.
• The facile synthesis method makes it suitable for scalable production.