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Updated: Apr 18, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
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Polypyrrole shell@3D-Ni metal core structured electrodes for high-performance supercapacitors.

Gao-Feng Chen1, Yu-Zhi Su, Pan-Yong Kuang

  • 1School of Chemistry and Chemical Engineering/Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, Guangzhou University, Guangzhou Higher Education Mega Center, Waihuan Xi Road No. 230 510006 (P. R. China).

Chemistry (Weinheim an Der Bergstrasse, Germany)
|January 10, 2015
PubMed
Summary

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Researchers developed a new polypyrrole (PPy) shell@3D-Nickel (Ni) core composite for high-performance supercapacitors. This nanometal composite enhances ion transport and electron transfer, significantly improving energy storage capabilities.

Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Three-dimensional (3D) nanometal films are promising as current collectors for high-performance supercapacitors.
  • Their 3D structure facilitates fast ion transport and electron transfer, crucial for electrochemical reactions.

Purpose of the Study:

  • To develop a novel polypyrrole (PPy) shell@3D-Ni-core composite.
  • To enhance the electrochemical performance of conventional PPy using a 3D Ni metal core.

Main Methods:

  • Fabrication of a PPy shell@3D-Ni-core composite material.
  • Electrochemical characterization of the composite's specific capacitance, rate capability, and cycle stability.
  • Assembly and testing of an aqueous symmetric supercapacitor device using the composite electrodes.
Keywords:
core-shell structureselectrochemistrynickelpolypyrrolesupercapacitors

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Main Results:

  • The PPy/3D-Ni composite achieved a high specific capacitance of 726 F/g at 1 A/g.
  • It demonstrated good rate capability with only a 33% capacitance decay from 1 to 20 A/g.
  • The material exhibited excellent cycle stability with a 4.2% decrease in capacitance after 1000 cycles.
  • The supercapacitor device showed a high energy density of ~21.2 Wh/kg and superior long-term cycling stability (4.4% and 18.6% loss after 2000 and 5000 cycles, respectively).

Conclusions:

  • The PPy shell@3D-Ni-core composite significantly enhances supercapacitor performance compared to conventional PPy.
  • The 3D Ni core acts as an effective conductive backbone, improving ion and electron transport.
  • This novel composite is a promising candidate for advanced energy storage applications.