| Autor: |
Kolkovska, H. M., Yaremiy, I. P., Kolkovskyi, P. I., Sklepova, S-V. S., Rachiy, B. I., Belous, A. G., Halushchak, M. O. |
| Předmět: |
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| Zdroj: |
Journal of Nano- & Electronic Physics; 2022, Vol. 14 Issue 1, p01020-1-01020-6, 6p |
| Abstrakt: |
In this work, lanthanum (LaMnO3), strontium (SrMnO3) and Sr-doped lanthanum (La0.7Sr0.3MnO3) manganites with the perovskite structure were synthesized by the sol-gel autocombustion method. Moreover, the obtained material structure was investigated by the XRD method. Additionally, the electrochemical properties of nanoporous carbon materials (CMs), lanthanum (LaMnO3) and strontium (SrMnO3) manganites, as well as La0.7Sr0.3MnO3 were investigated by the methods of chronoamperometry and voltammetry, and the application of these materials as electrodes (anode and cathode) of hybrid electrochemical supercapacitors (HECs) was tested. The hybrid electrochemical system of the CM/KOH/La0.7Sr0.3MnO3 type was formed. The employment of this system made it possible to increase the operating voltage range of HEC based on aqueous electrolytes from 0-1 to 0-1.4 V and, consequently, increase the energy characteristics of a unit cell. It was determined that high specific capacitance values were recorded for HECs with an electrode based on La0.7Sr0.3MnO3 and amounted to about 235 F/g at 1 mV/s. At the same time, much lower specific capacitance values were obtained for HECs with electrodes based on LaMnO3 and SrMnO3, which were about 130 F/g and 40 F/g, respectively. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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