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Laser-Induced Graphene Microsupercapacitors: Structure, Quality, and Performance.

Andres Velasco^1,2, Yu Kyoung Ryu¹, Assia Hamada¹

¹Instituto de Sistemas Optoelectrónicos y Microtecnología, Universidad Politécnica de Madrid, Av. Complutense 30, 28040 Madrid, Spain.

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|March 11, 2023

Summary

Researchers optimized laser conditions to create high-quality laser-induced graphene (LIG) microsupercapacitors from thin polyimide. These flexible devices offer excellent capacitance and energy storage for advanced electronics.

Keywords:

energy storage graphene laser-induced graphene specific capacitance supercapacitor

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Area of Science:

Materials Science
Nanotechnology
Electrochemistry

Background:

Laser-induced graphene (LIG) offers a rapid, cost-effective method for synthesizing graphene materials.
LIG is suitable for flexible electronics and energy storage, particularly supercapacitors.
Miniaturization of LIG device thickness for enhanced performance remains an underexplored area.

Purpose of the Study:

To optimize laser parameters for fabricating high-quality LIG microsupercapacitors (MSCs).
To investigate the correlation between structural morphology, material quality, and electrochemical performance of LIG MSCs.
To explore the potential of LIG for miniaturized, high-performance energy storage devices.

Main Methods:

Utilized point-by-point laser pyrolysis to synthesize LIG from 60 µm thick polyimide substrates.
Optimized laser conditions by correlating structural morphology, material quality, and electrochemical performance.
Characterized the structural and material properties of the fabricated LIG.

Main Results:

Achieved high capacitance of 22.2 mF/cm² at 0.05 mA/cm².
Demonstrated energy and power densities comparable to pseudocapacitor-hybridized devices.
Confirmed the LIG material consists of high-quality multilayer graphene nanoflakes with optimal porosity and structural continuity.

Conclusions:

Optimized laser processing enables the fabrication of high-quality LIG MSCs from thin polyimide.
The developed LIG MSCs exhibit excellent electrochemical performance suitable for flexible electronics.
This work advances the miniaturization of graphene-based energy storage devices.