Nitrogen-enriched carbon sheets derived from egg white by using expanded perlite template and its high-performance ...

Area of Science:

• Materials Science
• Electrochemistry
• Sustainable Energy

Background:

• Supercapacitors are crucial for energy storage.
• Developing cost-effective and high-performance electrode materials is essential.
• Sustainable precursors are sought for advanced materials.

Purpose of the Study:

• To synthesize nitrogen-enriched carbon sheets using egg white and expanded perlite.
• To evaluate the supercapacitive performance of the synthesized material.
• To investigate the potential of egg white as a sustainable carbon source for energy storage.

Main Methods:

• Synthesis of nitrogen-enriched carbon sheets via carbonization of egg white on expanded perlite template.
• Electrochemical characterization of the material as an electrode for supercapacitors.
• Performance evaluation in a 3-electrode setup and symmetric supercapacitor device.

Main Results:

• Maximum gravimetric specific capacitance of 302 F g(−1) at 0.5 A g(−1) for carbonized at 850 °C and activated for 6 h sample.
• Excellent cycle life with only 2% capacitance loss after 10,000 cycles at 0.1 A g(−1).
• Demonstrated superior pseudocapacitance attributed to 3D structure and nitrogen doping.

Conclusions:

• Egg white is a viable and sustainable precursor for high-performance supercapacitor electrode materials.
• The synthesized nitrogen-enriched carbon sheets offer excellent electrochemical performance and stability.
• This approach presents a promising pathway for developing advanced energy storage devices from renewable resources.