A Novel High-Performance Supercapacitor based on Chitosan/Graphene Oxide-MWCNT/Polyaniline

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Developing advanced electrode materials is crucial for high-performance energy storage devices.
• Chitosan and graphene-based materials offer promising properties for supercapacitors.
• Polyaniline is known for its pseudocapacitive characteristics.

Purpose of the Study:

• To synthesize and characterize a ternary nanocomposite of chitosan/graphene oxide-MWCNT/polyaniline (CS/GM/PANI).
• To investigate the supercapacitive behavior of the synthesized nanocomposite.
• To evaluate the potential of CS/GM/PANI as an electrode material for supercapacitors.

Main Methods:

• In situ polymerization of aniline onto chitosan/graphene oxide-MWCNT (CS/GM) scaffold.
• Morphological and structural characterization using FE-SEM, FT-IR, and XPS.
• Electrochemical performance evaluation via cyclic voltammetry (CV), galvanostatic charge-discharge (CD), and electrochemical impedance spectroscopy (EIS) in 0.5M Na2SO4.

Main Results:

• The CS/GM/PANI nanocomposite demonstrated significantly improved specific capacitance (609.2 Fg-1 at 10 mVs-1) compared to CS and CS/GM.
• Excellent cycle stability was observed, retaining 96% of initial capacitance after 500 cycles at 5 Ag-1.
• Characterization confirmed the formation of the ternary nanocomposite with a porous structure.

Conclusions:

• The synthesized CS/GM/PANI ternary nanocomposite exhibits superior supercapacitive properties.
• The enhanced performance is attributed to the synergistic effects of the components and the resulting porous structure.
• CS/GM/PANI is a promising candidate for next-generation supercapacitor electrodes.