Investigations on electrochemical performances of Co(OH)2, Fe2O3 and Mn3O4 nanoparticles covered carbon micro spheres for supercapacitor application

Improved supercapacitor application of manganese ferrite nanoparticles via co-precipitation technique

The novel co-precipitation technique has been employed to create the manganese ferrite nanoparticle. The prepared sample was annealed for various temperatures 400 °C, 600 °C and 700 °C. Based on TG/DT analysis the optimal temperature was found to be 700 °C and further additional analysis was performed for the sample annealed at 700 °C. Their morphology and properties were determined using SEM, HR-TEM, EDX, FTIR, XPS, BET, and CV techniques. Using the X-ray diffraction technique, the prepared sample's structural characteristics were demonstrated. The SEM as well as HR-TEM images showed the nanoparticles had a roughly spherical shape. The EDX analysis confirmed the presence of the elements Fe, O, and Mn in the sample; there was no evidence of contamination by other elements. The specific surface area of the nanoparticles was estimated by BET analysis, which provides details of the material's porosity and surface area. The binding energy of the sample was estimated using XPS measurements, which provide details on the composition and chemical states of the individual elements. By using cyclic voltammetry, the nanoparticles' electrochemical characteristics were evaluated. For a reduced scan rate of 2 mVs-1, the specific capacitance value was discovered to be 341 Fg-1, confirming their suitability for super capacitor applications.