Microwave assisted Gd(OH)₃-MXene nanocomposites for high power density solid state supercapacitor applications

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Supercapacitors are crucial for energy storage.
• Developing advanced electrode materials is key to improving supercapacitor performance.
• MXene-based nanocomposites offer unique properties for electrochemical applications.

Purpose of the Study:

• To synthesize and characterize a gadolinium hydroxide-MXene nanocomposite.
• To evaluate its potential as an electrode material for supercapacitors.
• To investigate the electrochemical performance and stability of the nanocomposite.

Main Methods:

• Microwave-assisted synthesis of gadolinium hydroxide-MXene nanocomposite.
• Electrochemical characterization using cyclic voltammetry and galvanostatic charge-discharge.
• Fabrication and testing of a solid-state hybrid supercapacitor (Gd-MX//AC).

Main Results:

• The nanocomposite exhibited a specific capacity of 128 mAh g^-1.
• Achieved 98% capacitance retention after 5000 cycles.
• The Gd-MX//AC supercapacitor demonstrated an energy density of 25.8 Wh kg^-1 and a power density of 3000 W kg^-1.

Conclusions:

• The gadolinium hydroxide-MXene nanocomposite is a highly effective supercapacitor electrode material.
• The material shows excellent electrochemical performance and long-term stability.
• This work contributes to the development of next-generation energy storage devices.