Open AccessThe Impact of the Surface Morphology on Energy Characteristics of Nanoporous Carbon Material
Author(s) -
B. K. Ostafiychuk,
І. М. Budzulyak,
B.І. Rachiy,
Lyudmyla Shyyko,
R. P. Lisovsky,
N.Ya. Ivanichok,
Vitalii M Vashchynsky
Publication year - 2014
Publication title -
journal of vasyl stefanyk precarpathian national university
Language(s) - English
Resource type - Journals
eISSN - 2413-2349
pISSN - 2311-0155
DOI - 10.15330/jpnu.1.1.17-25
Subject(s) - electrolyte , lithium (medication) , nanoporous , aqueous solution , electrochemistry , supercapacitor , materials science , chemical engineering , sodium sulfate , capacitor , potassium , sodium , inorganic chemistry , chemistry , nanotechnology , electrode , organic chemistry , metallurgy , medicine , physics , voltage , quantum mechanics , engineering , endocrinology
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.