MXene/Ag₂CrO₄ Nanocomposite as Supercapacitors Electrode.

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Supercapacitors are crucial for energy storage.
• MXene and Ag2CrO4 are promising materials for electrochemical applications.
• Developing cost-effective synthesis methods for nanocomposites is essential.

Purpose of the Study:

• To synthesize a novel MXene/Ag2CrO4 nanocomposite.
• To investigate its potential for supercapacitor applications.
• To analyze its electrochemical properties and capacitive behavior.

Main Methods:

• Co-precipitation and sol-gel techniques for nanocomposite synthesis.
• X-ray diffraction (XRD), scanning electron microscopy (SEM), Energy dispersive X-ray (EDX), Raman, and photoluminescence (PL) spectroscopy for material characterization.
• Electrochemical techniques including cyclic voltammetry and electrochemical impedance spectroscopy (EIS) for performance evaluation.

Main Results:

• Successful synthesis of MXene/Ag2CrO4 nanocomposite with increased inter-planar spacing.
• Ag2CrO4 nanoparticles dispersed on MXene layers observed via SEM.
• Estimated energy band gap of 3.86 eV from PL spectra.
• Achieved a specific capacitance of 525 F/g at 10 mVs-1 in 0.1 M H2SO4 electrolyte.

Conclusions:

• The MXene/Ag2CrO4 nanocomposite shows significant potential for supercapacitor applications.
• The material exhibits superior capacitive performance in acidic electrolytes compared to basic ones.
• This study highlights a novel synthesis route for advanced energy storage materials.