Conductive CNT network assisted BaTiO₃ nanocomposites for advanced supercapacitor electrodes

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Supercapacitors are crucial for energy storage.
• Developing advanced electrode materials is key to improving supercapacitor performance.
• Barium titanate (BaTiO₃) and carbon nanotubes (CNTs) are promising materials for energy storage.

Purpose of the Study:

• To synthesize and characterize a BaTiO₃@CNTs nanocomposite.
• To investigate the application of this nanocomposite as a supercapacitor electrode.
• To evaluate the electrochemical performance and stability of the developed supercapacitor device.

Main Methods:

• Synthesis of BaTiO₃@CNTs nanocomposite.
• Structural and surface characterization using SEM, EDX, XRD, BET, and XPS.
• Electrochemical performance testing of supercapacitor devices, including cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy.
• Cycling stability and coulombic efficiency measurements.

Main Results:

• Successful synthesis of BaTiO₃@CNTs with high surface area and enhanced electrical conductivity.
• The BaTiO₃@CNTs composite demonstrated significantly improved capacitance compared to pure BaTiO₃ and CNTs.
• An asymmetric BaTiO₃@CNT//AC device achieved high energy density (65.33 Wh kg^-1) and power density (4200 W kg^-1).
• The device exhibited excellent cycling stability, retaining 95.35% capacitance after 12,000 cycles, with 93% coulombic efficiency.

Conclusions:

• The BaTiO₃@CNTs nanocomposite is a highly effective material for advanced supercapacitor electrodes.
• The synergistic effect between BaTiO₃ and CNTs enhances electrochemical performance.
• The developed supercapacitor demonstrates promising potential for practical energy storage applications due to its high performance and stability.