2D/2D Nanoarchitectured Nb₂C/Ti₃C₂ MXene Heterointerface for High-Energy Supercapacitors with Sustainable Life Cycle

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Layered 2D/2D heterointerface composites, particularly MXene-based ones, are gaining attention for supercapacitor electrodes due to their unique properties.
• MXenes offer excellent energy storage compatibility, making them promising for advanced energy storage systems.

Purpose of the Study:

• To synthesize a novel 2D/2D Nb2C/Ti3C2 MXene heterointerface nanoarchitecture (NCTC).
• To investigate the electrochemical performance and stability of the NCTC material for supercapacitor applications.

Main Methods:

• Facile one-pot chemical etching was employed for the in situ preparation of the NCTC heterointerface.
• The methodology focused on simultaneous growth of MXenes to maintain active surfaces and enhance ion diffusion.

Main Results:

• The NCTC electrode achieved a high specific capacitance of 584 F/g at 2 A/g and an energy density of 38.5 Wh/kg.
• The all-solid-state system demonstrated remarkable cycling stability, retaining 98% capacitance after 50,000 cycles.

Conclusions:

• The in situ synthesized NCTC heterointerface exhibits superior charge storage capabilities and microstructural stability.
• These findings highlight the potential of 2D/2D heterointerfaces for developing next-generation supercapacitors.