Accumulation charge mechanisms in electrochemical systems formed based on activated carbon and manganese oxide

  • B. K. Ostafiychuk Vasyl Stefanyk Precarpathian National University
  • M. I. Kolkovskyi Vasyl Stefanyk Precarpathian National University
  • B. I. Rachiy Vasyl Stefanyk Precarpathian National University
  • P. I. Kolkovskyi Vasyl Stefanyk Precarpathian National University
  • N. Ya. Ivanichok Vasyl Stefanyk Precarpathian National University
  • R. V. Ilnitsky Vasyl Stefanyk Precarpathian National University
Keywords: hybrid electrochemical supercapacitors, porous carbon material, manganese oxide

Abstract

In this work, the porous structure of the carbon material and the crystalline structure of manganese oxide α - modification (α - MnO2) have been investigated. The electrochemical performance of symmetric and asymmetric supercapacitors (α - MnO2 / Activated carbon) 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 0.5 - 5 mA, the specific capacitance value for the α - MnO2 / Activated carbon hybrid capacitor exceeds the value of the symmetric capacitor by 45 - 55 % under the same conditions.

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Published
2020-03-29
How to Cite
Ostafiychuk, B. K., Kolkovskyi, M. I., Rachiy, B. I., Kolkovskyi, P. I., Ivanichok, N. Y., & Ilnitsky, R. V. (2020). Accumulation charge mechanisms in electrochemical systems formed based on activated carbon and manganese oxide. Physics and Chemistry of Solid State, 21(1), 27-34. https://doi.org/10.15330/pcss.21.1.19-34
Section
Scientific articles

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