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Boosting flexible laser-induced graphene supercapacitors performance through double pass laser processing.

Assia Hamada¹, Yu Kyoung Ryu^1,2, Andres Velasco¹

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

|January 31, 2025

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This study enhances supercapacitor performance using a simple laser-induced graphene (LIG) method. Two laser passes on polyimide film improve pore size, graphitization, and material density, boosting energy density and stability.

Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Supercapacitors are crucial energy storage devices.
Enhancing supercapacitor performance requires advanced electrode materials.
Laser-induced graphene (LIG) offers a promising route for electrode fabrication.

Purpose of the Study:

To develop a cost-effective method for improving laser-induced graphene (LIG) for supercapacitor electrodes.
To investigate the impact of multi-pass laser treatment on LIG morphology and electrochemical properties.
To evaluate the performance of LIG-based supercapacitors fabricated using the enhanced method.

Main Methods:

Utilizing a CO2 engraver for two consecutive laser passes on polyimide film to create LIG.
Characterizing the structural and morphological changes in LIG.

Keywords:

Energy storage Supercapacitors

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Fabricating and testing supercapacitor devices with LIG electrodes.

Main Results:

Two laser passes expanded pore size, increased graphitization, and densified the LIG material.
Areal energy density increased from 0.77 to 2.20 μWh/cm² at 0.05 mA/cm².
Equivalent series resistance reduced by 60%, with 91% capacitance retention after 10,000 cycles.

Conclusions:

The proposed simple and cost-effective two-pass laser treatment significantly enhances LIG properties for supercapacitors.
The improved LIG electrodes demonstrate superior electrochemical performance, including higher energy density and excellent cycling stability.
This method offers a viable pathway for developing high-performance, durable supercapacitors.