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High-Performance Supercapacitors with Femtosecond-Laser-Nanostructured Current Collectors.

Oleksandr Kuznetsov^1,2, Fedir Ivashchyshyn², Andriy Lotnyk³

¹"NoviNano" Lab LLC, Pasternaka, 5, 79015 Lviv, Ukraine.

ACS Applied Engineering Materials

|December 4, 2025

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Laser-induced periodic surface structures (LIPSS) significantly reduce supercapacitor interfacial resistance by 90%. This method enhances energy storage device performance and durability without additional materials, simplifying scale-up.

Area of Science:

Materials Science
Electrochemistry
Surface Engineering

Background:

Interfacial resistance between current collectors and active materials in supercapacitors causes energy loss and reduced power.
Poor adhesion leads to device degradation during operation.

Purpose of the Study:

To develop a method for reducing interfacial resistance in supercapacitors.
To improve the electrochemical performance and operational stability of supercapacitors.

Main Methods:

Fabrication of laser-induced periodic surface structures (LIPSS) on current collectors using femtosecond laser processing in a nitrogen environment.
Electrochemical characterization of supercapacitors with treated and untreated collectors.

Main Results:

Keywords:

LIPSS current collectors electrodes femtosecond laser supercapacitors

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Charge-transfer resistance decreased by 90% after laser processing.
Increased contact area and improved surface conductivity/stability due to LIPSS formation.
Enhanced adhesion of active material to the current collector, improving mechanical stability.

Conclusions:

Laser-induced periodic surface structures (LIPSS) effectively reduce interfacial resistance and enhance supercapacitor performance.
The method offers a scalable, reagent-free approach for improving energy storage devices.
This technique holds promise for increasing the specific power of various supercapacitor types.