MnFe2O4: Synthesis, Morphology and Electrochemical Properties

MnFe2O4 has been synthesized by simple ammonia assisted co-precipitation method to obtain nanocrystalline powder. X-ray diffraction studies confirmed its crystallinity and phase purity. The MnFe2O4 calcined at 1000 degrees C for 4 h has spinel crystal structure with Fd3m space group and lattice constant 8.511 angstrom. The electrode was prepared by dip coating method on stainless steel substrate and fired at 600 degrees C for 2 h. Random shape grains of 0.2 to 1.5 micron with pores of 1-2 micron dimensions were observed in SEM images. The electrochemical studies of MnFe2O4 were carried out with 1 mole Na2SO4 electrolyte. The MnFe2O4 electrode shows highest specific capacitance of 27.53 F.g(-1) and interfacial capacitance of 0.83 F. cm(-2).