Abstract
Green synthesis of MnO2 was carried out using natural extracts of Tilia cordata (TC) and Calendula officinalis (CO). Utilizing the transmission electron microscopy, powder X-ray diffraction, and UV–Vis spectra techniques confirmed the successful synthesis of α-MnO2. The BET analysis showed that the CO-derived material has a larger surface area and appropriate mesoporous structure. The obtained synthesized materials were assembled in asymmetric supercapacitor test cell, with a polymer membrane serving as a separator and an electrolyte. The prepared CO-MnO2 demonstrates excellent capacitance and energy characteristics and seems to be a promising electrode material for the development of environmentally friendly solid-state supercapacitors.
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This research is funded by the Ministry of Education and Science of Bulgaria under the National Program “European Scientific Networks” (Agreement D01-286/07.10.2020). The authors gratefully acknowledge.
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Mladenova, B., Pashova, K., Hinkov, I. et al. Green synthesis of MnO2 using Calendula officinalis and Tilia cordata extracts for application in supercapacitors. Monatsh Chem 155, 341–348 (2024). https://doi.org/10.1007/s00706-024-03179-3
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DOI: https://doi.org/10.1007/s00706-024-03179-3