Electrochemical Investigation of Activated Carbon Electrode Supercapacitors

P. Shabeeba P. Shabeeba , Mohamed Shahin Thayyil Mohamed Shahin Thayyil , M. P. Pillai M. P. Pillai , P. P. Soufeena P. P. Soufeena , C. V. Niveditha C. V. Niveditha
Российский электрохимический журнал
Abstract / Full Text

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.

Author information
  • Department of Physics, University of Calicut, Malappuram, Kerala, India

    P. Shabeeba, Mohamed Shahin Thayyil & P. P. Soufeena

  • Department of Nanoscience and Technology, University of Calicut, Malappuram, Kerala, India

    C. V. Niveditha

  • Department of Electronics, NIELIT, Calicut, Kerala, India

    M. P. Pillai

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