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Updated: Nov 1, 2025

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
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Boosting supercapacitive performance of flexible carbon via surface engineering.

Yingjie Tao1, Wenning Liu1, Zhipeng Li1

  • 1College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou 311300, PR China.

Journal of Colloid and Interface Science
|June 20, 2021
PubMed
Summary

Researchers developed a surface engineering method to enhance flexible carbon for supercapacitors. This technique improves conductivity and capacitance, leading to high-performance flexible energy storage devices.

Keywords:
ElectrodeFlexible carbonSupercapacitorSurface engineering

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Low specific capacitance of flexible carbons limits supercapacitor performance.
  • Developing high-performance flexible supercapacitors requires improved electrode materials.

Purpose of the Study:

  • To propose a surface engineering method to boost the supercapacitive performance of flexible carbon.
  • To fabricate and characterize a novel flexible carbon material for supercapacitor applications.

Main Methods:

  • Fabrication of flexible carbon (AKCF) from carbon felt via co-activation with potassium argininate and potassium hydroxide (KOH).
  • Surface modification using potassium argininate to create a micro-graphitized carbon layer.
  • Electrochemical testing of the modified carbon electrode in supercapacitors.

Main Results:

  • The co-activation process yielded a micro-graphitized carbon layer, enhancing electronic transfer and conductivity.
  • The AKCF-0.1 electrode exhibited a 1.8-fold increase in capacitance (403 C·g⁻¹) compared to KOH activation alone.
  • The electrode demonstrated excellent rate capability (66% retention) and cycling stability (20,000 cycles) with high energy densities in asymmetric supercapacitors.

Conclusions:

  • Surface engineering with potassium argininate effectively enhances flexible carbon for supercapacitors.
  • The developed AKCF material offers superior electrochemical performance for flexible energy storage.
  • This approach paves the way for advanced, high-performance flexible supercapacitors.