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Updated: Oct 26, 2025

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A Multi-Scale Structural Engineering Strategy for High-Performance MXene Hydrogel Supercapacitor Electrode.

Xianwu Huang1, Jiahui Huang1, Dong Yang1

  • 1State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Laboratory for Advanced Materials, Fudan University, Shanghai, 200433, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|August 2, 2021
PubMed
Summary

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This summary is machine-generated.

This study engineered MXene hydrogels into 3D structures for high-performance supercapacitors. The novel design enhances ion accessibility and energy storage, paving the way for advanced electrochemical devices.

Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Two-dimensional (2D) MXene materials show promise for supercapacitors.
  • Flat-lying MXene flakes create tortuous ion pathways, limiting performance.
  • Developing 3D MXene structures is crucial for improved ion accessibility.

Purpose of the Study:

  • To engineer a high-performance MXene hydrogel electrode with a 3D structure.
  • To enhance ion transport and accessibility in MXene-based supercapacitors.
  • To demonstrate the fabrication of 3D-printed all-MXene micro-supercapacitors (MSCs).

Main Methods:

  • Facile strategy for multi-scale structural engineering of MXene hydrogels.
  • Unidirectional freezing of MXene slurry followed by controlled thawing in sulfuric acid electrolyte.
Keywords:
3D printingMXene, supercapacitor electrodesenergy densityhydrogelmulti-scale

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  • Fabrication of 3D-printed all-MXene micro-supercapacitors.

    • Main Results:

    • Engineered hydrogel electrodes possess a 3D open macrostructure with H+-intercalated microstructure.
    • Achieved ordered channels for efficient through-electrode ion and electron transport.
    • Demonstrated ultrahigh areal capacitance (2.0 F cm⁻²) and record energy density (0.1 mWh cm⁻²) in MSCs.

    Conclusions:

    • The proposed strategy effectively creates 3D MXene hydrogels for superior supercapacitor performance.
    • The 3D structure significantly improves ion accessibility and energy storage capabilities.
    • This approach is extendable to fabricating advanced 3D-printed energy storage devices.