The Impact of the Surface Morphology on Energy Characteristics of Nanoporous Carbon Material

  • B.K. Ostafiychuk Vasyl Stefanyk Precarpathian National University
  • I.M. Budzulyak Vasyl Stefanyk Precarpathian National University
  • B.I. Rachiy Vasyl Stefanyk Precarpathian National University
  • L.O. Shyyko Vasyl Stefanyk Precarpathian National University
  • R.P. Lisovsky Vasyl Stefanyk Precarpathian National University
  • N.Ya. Ivanichok Vasyl Stefanyk Precarpathian National University
  • V.M. Vashchynsky Vasyl Stefanyk Precarpathian National University
Keywords: activated carbon material, double electric layer, electrolyte, specific capacity, internal resistance, electrochemical capacitor

Abstract

The impact of nanoporous carbon material (PCM) morphology on its electrochemical behavior in aqueous electrolyte has been studied. The optimum concentration of aqueous lithium sulfate which provides the maximum specific energy characteristics of capacitor-type systems C/Li2SO4/C is determined. Capacitive parameters of electrochemical capacitors (EC) in aqueous so­lutions of lithium, sodium and potassium sulfate which have different molar ratio have been stu­died by comparative analysis. Cyclic voltammograms at different scan rates show that the PCM ca­pacitive behavior in three electrolytes increases in the following order Li2SO4<Na2SO4<K2SO4. This imp­rovement could be a result of increasing the movement speed of hydrated ions in the volume of electrolyte and in the internal pores of PCM in the order Li+<Na+<K+. The obtained results give valuable information for the study of new hybrid supercapacitors.

Published
2014-05-05
How to Cite
(1)
Ostafiychuk B., Budzulyak I., Rachiy B., Shyyko L., Lisovsky R., Ivanichok N., Vashchynsky V. The Impact of the Surface Morphology on Energy Characteristics of Nanoporous Carbon Material. jpnu 2014, 1 (1), 17-25.
Section
Articles

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