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Electrostatic Interfacial Cross-Linking and Structurally Oriented Fiber Constructed by Surface-Modified 2D MXene for

Yuanchuan Zheng1, Yalei Wang1, Jiupeng Zhao1

  • 1School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China.

ACS Nano
|February 1, 2023
PubMed
Summary

Researchers developed a flexible MXene fiber supercapacitor using liquid-crystalline wet-spinning. This advanced fiber offers high energy density and stability for powering wearable electronics.

Keywords:
MXene fiberflexible pseudocapacitance storageinterfacial cross-linkingliquid-crystalline assemblyoriented structure

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Fiber supercapacitors are crucial for wearable electronics but limited by electrode structure.
  • Insufficient cross-linking and random fiber structures hinder performance.

Purpose of the Study:

  • To fabricate highly flexible and electrochemically performant MXene fibers.
  • To enhance interfacial cross-linking and create an oriented fiber structure.

Main Methods:

  • Utilized liquid-crystalline wet-spinning assembly for 2D MXene sheets.
  • Employed surface-modified MXene with oxyanion-enriched terminations for cross-linking.
  • Constructed continuous, highly oriented macroscopic fibers.

Main Results:

  • Achieved high electrical conductivity (3545 S cm-1) and mechanical strength (205.5 MPa).
  • Demonstrated high pseudocapacitance charge storage (1570.5 F cm-3).
  • Developed fiber supercapacitors with high energy density (77.6 mWh cm-3) and stability (99.5% retention).

Conclusions:

  • The developed MXene fiber exhibits superior electrochemical and mechanical properties.
  • This fabrication method enables high-performance flexible fiber supercapacitors.
  • The technology is suitable for integration into textiles to power microelectronic devices.