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Charge Storage and Magnetic Properties Nitrogen-Containing Nanoporous Bio-Carbon

Author

Listed:
  • Ewelina Szymczykiewicz

    (Faculty of Electrical Engineering, Czestochowa University of Technology, J. Dąbrowskiego Str. 69, 42-201 Częstochowa, Poland)

  • Ihor Bordun

    (Faculty of Electrical Engineering, Czestochowa University of Technology, J. Dąbrowskiego Str. 69, 42-201 Częstochowa, Poland
    Institute of Applied Mathematics and Fundamental Sciences, Lviv Polytechnic National University, Bandera Str. 12, 79013 Lviv, Ukraine)

  • Vitalii Maksymych

    (Institute of Applied Mathematics and Fundamental Sciences, Lviv Polytechnic National University, Bandera Str. 12, 79013 Lviv, Ukraine
    Faculty of Electronics and Computer Technologies, Ivan Franko Lviv National University, Universytetska Str. 1, 79005 Lviv, Ukraine)

  • Myroslava Klapchuk

    (Institute of Applied Mathematics and Fundamental Sciences, Lviv Polytechnic National University, Bandera Str. 12, 79013 Lviv, Ukraine)

  • Zenoviy Kohut

    (Faculty of Electrical Engineering, Czestochowa University of Technology, J. Dąbrowskiego Str. 69, 42-201 Częstochowa, Poland
    Institute of Applied Mathematics and Fundamental Sciences, Lviv Polytechnic National University, Bandera Str. 12, 79013 Lviv, Ukraine)

  • Anatoliy Borysiuk

    (Institute of Applied Mathematics and Fundamental Sciences, Lviv Polytechnic National University, Bandera Str. 12, 79013 Lviv, Ukraine)

  • Yuriy Kulyk

    (Faculty of Electronics and Computer Technologies, Ivan Franko Lviv National University, Universytetska Str. 1, 79005 Lviv, Ukraine)

  • Fedir Ivashchyshyn

    (Faculty of Electrical Engineering, Czestochowa University of Technology, J. Dąbrowskiego Str. 69, 42-201 Częstochowa, Poland
    Institute of Applied Mathematics and Fundamental Sciences, Lviv Polytechnic National University, Bandera Str. 12, 79013 Lviv, Ukraine)

Abstract

This article presents the technology for the preparation of a nitrogen-containing nanoporous bio-carbon and investigates its properties. It has been shown that the synthesised bio-carbon is characterised by a high degree of homogeneity, which has been confirmed by energy dispersive spectroscopy. The obtained bio-carbon has a micromesoporous structure, which has been confirmed by the results of studies using the method of low-temperature nitrogen adsorption and desorption. It was found that the specific surface area of biochar is 1247 m 2 /g. The data on nitrogen adsorption and desorption were compared with the data on small-angle X-ray scattering, and it was found that the micropores in the synthesised bio-carbon are open pores, while mesopores remain closed. The energy dispersion analysis showed that the structure of the bio-carbon does not contain ferromagnetic atoms, but due to the addition of nitrogen, the synthesised bio-carbon in a magnetic field has the properties of a ferromagnet with a characteristic hysteresis of the specific magnetisation. It was found that this material has a saturation magnetisation σ s of 1.4 A∙m 2 ∙kg −1 and a coercive force H c of 10 kA/m. Symmetric supercapacitors were fabricated from the synthesised bio-carbon material with 30% aqueous KOH and 1 M Na 2 SO 4 as electrolytes. It was found that for bio-carbon synthesised at 800 °C, the specific capacitance in a 30% aqueous solution of KOH is 180 F/g, and in a 1 M aqueous solution of Na 2 SO 4 , it is 124 F/g. The cyclic voltammetry of the fabricated supercapacitors at different rates of potential expansion was investigated and analysed. Impedance studies on these supercapacitors were carried out. The equivalent electrical circuits describing the electrochemical processes in the studied supercapacitors were constructed and characterised.

Suggested Citation

  • Ewelina Szymczykiewicz & Ihor Bordun & Vitalii Maksymych & Myroslava Klapchuk & Zenoviy Kohut & Anatoliy Borysiuk & Yuriy Kulyk & Fedir Ivashchyshyn, 2024. "Charge Storage and Magnetic Properties Nitrogen-Containing Nanoporous Bio-Carbon," Energies, MDPI, vol. 17(4), pages 1-20, February.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:4:p:903-:d:1339182
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    References listed on IDEAS

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    1. Young-Woo Son & Marvin L. Cohen & Steven G. Louie, 2006. "Half-metallic graphene nanoribbons," Nature, Nature, vol. 444(7117), pages 347-349, November.
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