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Related Experiment Video

Updated: May 12, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
12:00

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System

Published on: January 7, 2022

Flexible solid-state supercapacitors based on three-dimensional graphene hydrogel films.

Yuxi Xu1, Zhaoyang Lin, Xiaoqing Huang

  • 1Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States.

ACS Nano
|April 5, 2013
PubMed
Summary
This summary is machine-generated.

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The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...

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Researchers developed a 3D graphene hydrogel for flexible solid-state supercapacitors, achieving high areal capacitance and mechanical flexibility for advanced energy storage in electronics.

Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Flexible solid-state supercapacitors are crucial for mobile power in flexible electronics.
  • Existing graphene/carbon nanotube supercapacitors have limitations in areal capacitance due to thin electrodes.
  • Low mass loading in current devices hinders practical applications.

Purpose of the Study:

  • To explore the potential of 3D graphene hydrogel for high-performance flexible supercapacitors.
  • To overcome the limitations of thin-film electrodes in current flexible energy storage devices.
  • To investigate the capacitive characteristics and mechanical properties of graphene hydrogel-based supercapacitors.

Main Methods:

  • Fabrication of flexible solid-state supercapacitors using a 3D graphene hydrogel thin film.

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Related Experiment Videos

Last Updated: May 12, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
12:00

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System

Published on: January 7, 2022

Elaborate Control of Inkjet Printer for Fabrication of Chip-based Supercapacitors
10:57

Elaborate Control of Inkjet Printer for Fabrication of Chip-based Supercapacitors

Published on: November 30, 2021

  • Characterization of electrical conductivity and mechanical robustness of the graphene hydrogel.
  • Evaluation of capacitive performance, including gravimetric and areal specific capacitances.
  • Assessment of cycling stability, leakage current, and mechanical flexibility.

    • Main Results:

    • Graphene hydrogel exhibits an interconnected 3D network with high electrical conductivity and mechanical robustness.
    • Flexible supercapacitors achieved a high gravimetric specific capacitance of 186 F/g (up to 196 F/g).
    • Unprecedented areal specific capacitance reached 372 mF/cm(2) (up to 402 mF/cm(2)) with a 120 μm thick electrode.
    • Demonstrated low leakage current (10.6 μA), excellent cycling stability, and extraordinary mechanical flexibility.

    Conclusions:

    • 3D graphene hydrogel is a promising material for high-performance flexible energy storage.
    • The developed supercapacitors offer significant improvements in areal capacitance compared to existing technologies.
    • This work highlights the potential of 3D graphene macrostructures for advanced flexible electronics.