Surface Engineering and Applied Electrochemistry. Vol. 56, No. 6, Pages 697-703, 2020

B. I. Rachiy^a^, *, Yu. Yu. Starchuk^a^, **, P. I. Kolkovskyy^a, I. M. Budzulyak^a, L. S. Yablon^a, V. O. Kotsyubynsky ^a, O. V. Morushko^a, and O. M. Khemiy^a

^aFaculty of Physics and Technology, Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, 76018 Ukraine

Correspondence to: *e-mail: bogdan_rachiy@ukr.net;
Correspondence to: **e-mail: starchuk.yura@gmail.com

Abstract—In this work, the porous structure of a carbon material and a crystalline structure of NiWO₄ have been investigated. The electrochemical performance of symmetric and hybrid asymmetric supercapacitors was investigated by cyclic voltammetry and galvanostatic cycling methods. The processes occur mainly at the electrode-electrolyte interface have been analyzed. It was determined that at discharge currents of 1 and 5 mA, the specific capacitance value for the hybrid asymmetric supercapacitors twice exceeds the given value for the symmetric ones under the same conditions.

Keywords: hybrid electrochemical supercapacitors, porous carbon material, nickel tungstate, Faradaic redox reactions

Accumulation of Charge Mechanisms in Electrochemical Systems Based on Carbon and Nickel Tungstate