Electrochemical Properties of Hybrid Supercapacitors Formed Based on Nanoporous Carbon and Nickel Tungstate

Authors Yu.Yu. Starchuk1, B.I. Rachiy1 , I.M. Budzulyak1 , P.I. Kolkovskyi1 , , N.Ya. Ivanichok1, M.O. Halushchak2

1Vasyl Stefanyk Precarpathian National University, 57, Shevchenko St., 76018 Ivano-Frankivsk, Ukraine

2National Technical University of Oil and Gas, Karpats’ka St., 76000 Ivano-Frankivsk, Ukraine

Е-mail pkolkovskyy@gmail.com
Issue Volume 13, Year 2021, Number 6
Dates Received 12 April 2021; revised manuscript received 05 December 2021; published online 20 December 2021
Citation Yu.Yu. Starchuk, B.I. Rachiy, I.M. Budzulyak, et al., J. Nano- Electron. Phys. 13 No 6, 06021 (2021)
DOI https://doi.org/10.21272/jnep.13(6).06021
PACS Number(s) 81.07.Wх, 82.45.Yz, 82.47.Uv
Keywords Electrochemical energy storage devices, Nickel tungstate, Porous carbon material, Aqueous electrolyte.

In this work, the morphology of carbon material (CM) has been researched by the nitrogen adsorption/desorption method. Furthermore, it was determined that the specific surface area is about 1200-1300 m2/g. NiWO4 was synthesized by co-precipitation method, and its structure was investigated by XRD. Additionally, the electrochemical properties of CM and NiWO4 were studied by the methods of chronoamperometry and voltammetry, and the use of these materials as electrodes of hybrid supercapacitors (HSC) – anode and cathode, respectively, was tested. A hybrid electrochemical system of the CM/KOH/NiWO4 type was formed. The use of this system makes it possible to increase the operating voltage range of HSC based on aqueous electrolytes from 0-1 V to 0.6-1.6 V, and, consequently, to increase the energy characteristics of a unit cell by more than 2 times. It is shown that at operating currents of 1 mA, the specific capacity of the HSC is 57.1 F/g, while the specific energy density and power are 7.09 Wh/kg and 1.39 W/kg, respectively.

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