A simple chemical precipitation method has been used for the preparation of Mn3O4 nanoparticles at
room temperature. The crystal structure and morphology studies of the resulting Mn3O4 nanoparticles
were characterized by powder X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FT-IR),
Raman spectroscopy, scanning electron microscope (SEM), transmission electron microscope (TEM), N2
adsorption and desorption and X-ray photoelectron spectroscopy (XPS). The electrochemical properties
of the Mn3O4 nanoparticles were then investigated using cyclic voltammetry (CV), galvanostatic
charge–discharge and electrochemical impedance spectroscopy (EIS) analysis. The supercapacitive properties
of Mn3O4 nanoparticles in the presence of 1 M Na2SO4 exhibited a high specific capacitance of
322 F g1 at a current density of 0.5 mA cm2 in the potential range from 0.1 to +0.9 V and about
77% of the initial capacitance was retained after 1000 cycles, indicating that the Mn3O4 electrode owns
a good electrochemical stability and capacitance retention capability. The results suggest that the
obtained Mn3O4 nanoparticles is a promising electrode material for supercapacitor applications.
A simple chemical precipitation method has been used for the preparation of Mn3O4 nanoparticles atroom temperature. The crystal structure and morphology studies of the resulting Mn3O4 nanoparticleswere characterized by powder X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FT-IR),Raman spectroscopy, scanning electron microscope (SEM), transmission electron microscope (TEM), N2adsorption and desorption and X-ray photoelectron spectroscopy (XPS). The electrochemical propertiesof the Mn3O4 nanoparticles were then investigated using cyclic voltammetry (CV), galvanostaticcharge–discharge and electrochemical impedance spectroscopy (EIS) analysis. The supercapacitive propertiesof Mn3O4 nanoparticles in the presence of 1 M Na2SO4 exhibited a high specific capacitance of322 F g1 at a current density of 0.5 mA cm2 in the potential range from 0.1 to +0.9 V and about77% of the initial capacitance was retained after 1000 cycles, indicating that the Mn3O4 electrode ownsa good electrochemical stability and capacitance retention capability. The results suggest that theobtained Mn3O4 nanoparticles is a promising electrode material for supercapacitor applications.
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