Russian Journal of Electrochemistry

, Volume 54, Issue 3, pp 302–308 | Cite as

Electrochemical Investigation of Activated Carbon Electrode Supercapacitors

  • P. Shabeeba
  • Mohamed Shahin Thayyil
  • M. P. Pillai
  • P. P. Soufeena
  • C. V. Niveditha
Article
  • 15 Downloads

Abstract

Supercapacitors, also called as ultracapacitors, are electrochemical energy-storage devices that exploit the electrostatic interaction between high-surface-area nanoporous electrodes and electrolyte ions, combining properties of conventional batteries and conventional capacitors. A symmetrical activated carbon (AC) electrode supercapacitor has been fabricated in a simple and inexpensive manner. The AC has been synthesized from Charcoal, has activated in a furnace at high temperatures. The electrode was fabricated by casting slurry made of AC and blended in a polymer solution on the counter electrode (current collector), appeared to have high mechanical strength. The electrochemical performance of the prepared samples was tested in 1 M KCl solution by cyclic voltammetry (CV), galvanostatic charge discharge technique, and impedance spectroscopy. The surface and cross-section of electrode was observed with SEM. Capacitance of fabricated supercapacitor has a favorable capacitance in the range of 65–70 F/g with low resistance. The AC electrode supercapacitor has excellent electro chemical reversibility, good cycle stability with a low fading rate of specific capacitance even after 500 cycles, which is promising for energy storage applications.

Keywords

specific capacitance cyclic voltammetry impedance spectroscopy galvanostatic charge and discharge 

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • P. Shabeeba
    • 1
  • Mohamed Shahin Thayyil
    • 1
  • M. P. Pillai
    • 3
  • P. P. Soufeena
    • 1
  • C. V. Niveditha
    • 2
  1. 1.Department of PhysicsUniversity of CalicutMalappuramIndia
  2. 2.Department of Nanoscience and TechnologyUniversity of CalicutMalappuramIndia
  3. 3.Department of ElectronicsNIELITCalicutIndia

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