Development and Characterization of 3D-Printed PLA/Exfoliated Graphite Composites for Enhanced Electrochemical...

Area of Science:

• Materials Science
• Electrochemistry
• Polymer Science

Background:

• Developing advanced materials for 3D printing is crucial for creating customized electronic components.
• Polylactic acid (PLA) is a biodegradable polymer with potential for composite fabrication.
• Exfoliated graphite (EG) offers unique electrical and thermal properties.

Purpose of the Study:

• To synthesize and characterize a novel PLA/EG composite material for 3D printing applications.
• To investigate the structural, thermal, and electrochemical properties of the PLA/EG composite.
• To evaluate the potential of PLA/EG composites as electrode materials in electronic devices.

Main Methods:

• Composite synthesis via physical mixing and single-screw extrusion.
• Structural and vibrational analysis using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR).
• Thermal analysis using Thermogravimetric analysis (TGA).
• Electrochemical characterization including cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS).

Main Results:

• Successful formation of PLA/EG composite confirmed by XRD and FTIR, with physical adsorption as the main interaction.
• EG acts as a thermal barrier, reducing heat transfer in the composite (TGA).
• Electrochemical tests showed redox activity, specific capacitance of ~6 F g^-1, low resistance, and high actual capacitance (>1000 μF cm^-2), indicating efficient charge storage via Warburg diffusion.

Conclusions:

• The developed PLA/EG composite is suitable for 3D printing and exhibits promising electrochemical properties.
• The composite demonstrates significant potential for use as electrodes in electronic devices and energy storage systems.
• The fabrication method offers a practical route for creating functional composites for advanced applications.