Optimization studies on output stabilization time and graphene oxide concentration in graphene-based flexible...

Area of Science:

• Materials Science
• Nanotechnology
• Electrochemistry

Background:

• Miniature energy storage is crucial for flexible and wearable electronics.
• Micro-supercapacitors (MSCs) offer a promising solution for compact energy storage.

Purpose of the Study:

• To fabricate flexible laser-induced graphene-based MSCs.
• To optimize graphene oxide (GO) concentration for enhanced performance.
• To evaluate the stability and durability of the MSCs.

Main Methods:

• Laser-induced graphene fabrication on GO-coated polyimide film.
• Assembly of MSCs with H2SO4/polyvinyl alcohol (PVA) gel electrolyte.
• Daily capacitance assessment over ten days and electrochemical impedance spectroscopy.

Main Results:

• Capacitance stabilized after six days of assessment.
• Optimal GO concentration yielded an areal capacitance of 10.07 mF cm-2 at 13 µA cm-2.
• The optimized MSC retained 87.9% capacitance after 5000 cycles and showed reliable performance under bending.

Conclusions:

• Flexible laser-induced graphene MSCs are viable for energy storage in wearable devices.
• Optimized GO concentration and stability are key for practical applications.
• The developed MSCs demonstrate excellent durability and flexibility for self-powered systems.