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Highly Conductive and Reusable Cellulose Hydrogels for Supercapacitor Applications.

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  • 1Centre for Ionics, Department of Physics, Faculty of Science, Universiti Malaya, Kuala Lumpur 50603, Malaysia.

Micromachines
|July 29, 2023
PubMed
Summary

We developed advanced Na-Alginate/PEDOT:PSS hydrogels for flexible supercapacitors. These materials exhibit high ionic conductivity, excellent electrochemical stability, and remarkable self-healing properties, enabling efficient energy storage.

Keywords:
Na-Alginate/PEDOT:PSSelectrolyteflexible supercapacitorhydrogelionic conductivityself-healing

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Science

Background:

  • Developing advanced electrolytes is crucial for high-performance energy storage devices.
  • Hydrogels offer potential due to their high water content and ionic conductivity.
  • Incorporating conductive polymers can enhance electrochemical properties.

Purpose of the Study:

  • To fabricate novel Na-Alginate-based hydrogels using PEDOT:PSS and DMSO for supercapacitor applications.
  • To investigate the effect of H2SO4 treatment on hydrogel conductivity.
  • To evaluate the electrochemical performance, flexibility, and self-healing capabilities of the developed hydrogels.

Main Methods:

  • Fabrication of Na-Alginate/PEDOT:PSS hydrogels with DMSO.
  • In-situ synthesis and H2SO4 treatment for enhanced conductivity.
  • Characterization using FESEM, FTIR, and TGA.
  • Electrochemical testing of flexible supercapacitors (specific capacitance, stability).

Main Results:

  • Achieved a specific capacitance of 312 F/g for Na-Alginate/PEDOT:PSS based supercapacitors.
  • Electrolytes showed high ionic conductivity (9.82 × 10⁻² S/cm for Na-Alginate).
  • Supercapacitors demonstrated excellent stability (92.5% retention after 3000 cycles) and self-healing properties.

Conclusions:

  • The Na-Alginate/PEDOT:PSS hydrogels are promising electrolytes for flexible and self-healing supercapacitors.
  • The developed materials offer high performance and durability for energy storage applications.
  • The dynamic cross-linking network contributes to the hydrogel's flexibility and self-healing capabilities.