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High-Performance 3D Nanostructured Silver Electrode for Micro-Supercapacitor Application.

Ana Silvia González¹, Javier García¹, Victor Vega²

¹Depto. de Física, Facultad de Ciencias, Universidad de Oviedo, Federico García Lorca n° 18, 33007 Oviedo, Spain.

|November 6, 2023

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A novel 3D nanostructured silver electrode was developed for energy storage. This electrode shows high capacitance, excellent stability, and energy density, making it suitable for supercapacitors and electrochemical devices.

Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

The urgent need for renewable energy and pollution reduction drives research into advanced energy storage systems.
Supercapacitors are critical components for efficient energy storage, demanding novel electrode materials.

Purpose of the Study:

To design and characterize a novel 3D nanostructured silver electrode for enhanced electrochemical performance.
To evaluate the electrode's potential for applications in micro-supercapacitors and other electrochemical devices.

Main Methods:

Fabrication of a 3D nanostructured silver electrode using an antireplica/replica template-assisted procedure.
Electrochemical characterization using cyclic voltammetry and galvanostatic charge-discharge cycling in 5 M KOH.

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Microstructural and compositional analysis via SEM, EDX, XRD, and Kripton adsorption.

Main Results:

Achieved a large areal capacitance of 0.5 F/cm² and 97.5% Coulombic efficiency at 6.4 mA/cm².
Demonstrated excellent capacitance retention (95%) over 2600 cycles, indicating superior cyclic stability.
Reported high energy density (385.87 μWh/cm²) and power density (3.82 μW/cm²), along with electrochromic behavior.

Conclusions:

The developed 3D nanostructured silver electrode offers significant improvements in electrochemical performance.
The fabrication strategy is effective for enhancing electrode properties for energy storage applications.
The electrode shows promise for next-generation micro-supercapacitors and electrochemical devices.