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Highly Flexible and Planar Supercapacitors Using Graphite Flakes/Polypyrrole in Polymer Lapping Film.

C Justin Raj1, Byung Chul Kim1, Won-Je Cho1

  • 1†Department of Chemistry, Dongguk University-Seoul, Jung-gu, Seoul 100715, South Korea.

ACS Applied Materials & Interfaces
|May 27, 2015
PubMed
Summary

Flexible supercapacitor electrodes were fabricated using graphite nanoflakes and polypyrrole. These electrodes demonstrate excellent electrochemical performance, energy density, and power density with good flexibility and stability.

Keywords:
conducting polymerflexible electrodegraphite nanoflakesimpedance spectroscopysupercapacitor

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Flexible energy storage devices are crucial for wearable electronics.
  • Developing high-performance, flexible supercapacitor electrodes remains a challenge.

Purpose of the Study:

  • To fabricate flexible supercapacitor electrodes using graphite nanoflakes and polypyrrole.
  • To evaluate the electrochemical performance and stability of these novel electrodes.

Main Methods:

  • Fabrication of electrodes using graphite nanoflakes on polymer lapping films.
  • Coating with polypyrrole to enhance conductivity.
  • Electrochemical testing in various cell configurations (half cell, full cell, planar cell).

Main Results:

  • Maximum capacitance of 37 mF cm⁻² in a half cell with H2SO4 electrolyte.
  • Capacitance of 23 mF cm⁻² in a full cell and 6 mF cm⁻² in a planar cell with PVA/H3PO4 solid electrolyte.
  • Demonstrated good flexibility and cyclic stability.

Conclusions:

  • The fabricated graphite nanoflake/polypyrrole electrodes offer excellent electrochemical performance for flexible supercapacitors.
  • The simple fabrication technique and enhanced properties make these electrodes promising for future energy storage applications.