Single phase manganese doped Nickel Ferrite nanoparticles for Supercapacitor nature

In the field of supercapacitor applications, there has been significant interest in utilizing ferrite-based nanocomposites particularly that include Mn-doped NiFe2O4 nanoparticles. In the current study, Ni1-xMnxFe2O4 (x=0.5) nanoparticles were synthesized using the co-precipitation method. The crystalline nature of the prepared materials has been proved through XRD, for various annealing temperatures which revealed their highly ordered structure. Thermo gravimetric analysis offered insights into the optimal temperature of the samples, determining it to be 700ºC. Hence, further analysis of the produced sample was done at 700ºC. Additionally, the existence of functional groups was confirmed using FTIR spectroscopy. The morphology of the nanoparticles was studied through the SEM and HR-TEM, revealing well-defined nanostructures with approximately spherical shapes. The specific surface area of the nanoparticles was measured with the Brunauer-Emmett-Teller technique, which identifies the accessible surface area for electrochemical reactions. By employing X-ray photoelectron spectroscopy, the binding energies of the elements found in the samples Ni, Mn, Fe, and O were recorded; with EDX analysis validating these findings. To assess their electrochemical properties, cyclic voltammetry was performed, showcasing that the samples had a high capacitance of 424 Fg-1 on a lower scan rate of 2mVs-1, indicating their potential for application in supercapacitors.