Synthesis and Electrochemical Properties of Nanocrystalline Nickel Molybdate

  • O.M. Popovych Vasyl Stefanyk Precarpathian National University
  • I.M. Budzulyak Vasyl Stefanyk Precarpathian National University
  • O.V. Popovych Vasyl Stefanyk Precarpathian National University
  • B.I. Rachiy Vasyl Stefanyk Precarpathian National University
  • R.V. Ilnytskyi Vasyl Stefanyk Precarpathian National University
  • L.S. Yablon Vasyl Stefanyk Precarpathian National University
  • O.V. Morushko Vasyl Stefanyk Precarpathian National University
Keywords: nickel molybdate, hydrate, cyclic voltammogram, specific capacitance, сoulombic efficiency, activated carbon, hybrid supercapacitor

Abstract

We have obtained nanocrystalline hydrate and alpha phase of nickel molybdate by a hydrothermal technique. On the basis of the obtained cyclic voltammetry data, we have evaluated the contribution of faradaic and non-faradaic processes to the total capacitance of molybdates under study. It was found that the specific capacitance of hydrate NiMoO4·H2O is 621 F/g at a scan rate of 1 mV / s and the specific capacitance of the α-NiMoO4 is 281 F/g. Cathodes for hybrid supercapacitors were formed on the basis of the obtained nickel molybdates. As a result of electrochemical studies, it was found that the specific capacitance of hybrid supercapacitor based on NiMoO4·H2O/C was 256 F/g at the current of 0.2 A/g, while the specific energy was 80 W h/kg and specific power – 304 W/kg and these results are higher below in the α-NiMoO4 /C-based hybrid supercapacitor.

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Published
2021-03-13
How to Cite
[1]
PopovychO., BudzulyakI., PopovychO., RachiyB., IlnytskyiR., YablonL. and MorushkoO. 2021. Synthesis and Electrochemical Properties of Nanocrystalline Nickel Molybdate. Physics and Chemistry of Solid State. 22, 1 (Mar. 2021), 123-131. DOI:https://doi.org/10.15330/pcss.22.1.123-131.
Section
Scientific articles

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