Green synthesis of MnO2 using Calendula officinalis and Tilia cordata extracts for application in supercapacitors.

Autor: Mladenova, Borislava, Pashova, Katya, Hinkov, Ivaylo, Dimitrova, Mariela, Stoyanova, Antonia
Zdroj: Chemical Monthly / Monatshefte für Chemie; Apr2024, Vol. 155 Issue 3/4, p341-348, 8p
Abstrakt: 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. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index