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Related Experiment Video

Updated: Feb 13, 2026

Author Spotlight: Improving the Production of Self-Assembling Fibers and Peptide Hydrogels for Superior Biocompatibility

Author Spotlight: Improving the Production of Self-Assembling Fibers and Peptide Hydrogels for Superior Biocompatibility

Published on: September 6, 2024

Enhanced Supercapacitor Performance via Double Network Hydrogel Modified with Self-Assembled Metal Nanoparticles.

Aminur Rahman¹, Chanchal Kumar Roy¹, Kamrul Hasan¹

¹Department of Chemistry, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh.

The Journal of Physical Chemistry. B

|February 12, 2026

Summary

This study introduces metal nanoparticle-modified double-network (DN) hydrogels for flexible supercapacitors. These novel materials offer improved electrolyte retention and conductivity, enabling high-performance energy storage devices.

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Published on: November 30, 2022

Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

Double-network (DN) hydrogels show promise for flexible supercapacitors due to mechanical strength and flexibility.
Limitations include poor electrolyte retention and low ionic conductivity, hindering performance.
Novel modifications are needed to overcome these challenges for practical applications.

Purpose of the Study:

To develop a novel double-network (DN) hydrogel modified with self-assembled metal nanoparticles.
To enhance electrolyte retention and ionic conductivity for improved supercapacitor performance.
To fabricate and evaluate a flexible supercapacitor (FSC) using the modified DN hydrogel.

Main Methods:

Synthesized DN hydrogel via physical and chemical cross-linking.
Incorporated metal ions and reduced them in situ to form nanoparticles within the hydrogel network.
Fabricated a flexible supercapacitor using the nanocomposite hydrogel as electrode and electrolyte, with activated carbon nanosheets (ACNSs) from banana leaves as the active material.

Main Results:

The nanocomposite hydrogel exhibited enhanced electrolyte swelling capacity and ionic conductivity while maintaining mechanical flexibility.
The fabricated FSC achieved a high areal specific capacitance of 1361 mF cm^-2, energy density of 23 mWh cm^-2, and power density of 700 mW cm^-2.
The device demonstrated excellent cyclic stability, retaining 94% of its initial Coulombic efficiency after 500 cycles.

Conclusions:

Metal nanoparticle-enriched DN hydrogels are effective for flexible supercapacitor applications.
The developed hydrogel overcomes limitations of traditional DN hydrogels, offering superior performance.
These materials hold potential for next-generation integrated energy storage devices.