Laser-modified nanocrystalline NiMoO4 as an electrode material in hybrid supercapacitors

  • O.M. Popovych Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
  • I.M. Budzulyak Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
  • M.M. Khemii Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
  • R.V. Ilnytskyi Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
  • L.S. Yablon Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
  • D.I. Popovych Ya. S. Pidstryhach Institute for Applied Problems of Mechanics and Mathematics, Lviv, Ukraine
  • I.I. Panko Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
Keywords: hybrid supercapacitor, laser irradiation, nickel molybdate, electrical conductivity, specific capacitance


The nanocrystalline NiMoO4 obtained as a result of hydrothermal synthesis was exposed to laser radiation with a pulse energy of 70 mJ/cm2 for 5 minutes. The phase composition and size of crystallites of the triclinic structure of NiMoO4 were determined by X-ray analysis. The average crystallite size was 18 nm for laser-irradiated nickel molybdate. Impedance analysis was used to analyze the temperature dependence of the electrical conductivity of laser-modified NiMoO4. The frequency index of the power law, determined by the nonlinear approximation method, was 0.5-0.67, which corresponds to the hopping mechanism of charge carriers. The electrochemical behavior of NiMoO4 was studied using cyclic voltammetry and galvanostatic charge/discharge testing. The laser-irradiated NiMoO4 reaches a specific capacitance of 553 F/g at a scan rate of 1 mV/s. The hybrid electrochemical system based on electrodes of modified NiMoO4 and carbon material provides high Coulombic efficiency (95%) for a significant number of charge/discharge cycles.


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How to Cite
PopovychO., BudzulyakI., KhemiiM., IlnytskyiR., YablonL., PopovychD., & PankoI. (2023). Laser-modified nanocrystalline NiMoO4 as an electrode material in hybrid supercapacitors. Physics and Chemistry of Solid State, 24(1), 190-196.
Scientific articles (Physics)

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