a study on the supercapacitive behavior of zinc substituted manganese ferrite nanoparticles

Synthesis and applications of novel nanomaterials in energy storage are of great importance. in this study, nanoparticles of zinc substituted manganese ferrite (zn0.5mn0.5fe2o4) were synthesized by a simple coprecipitation method. the synthesized nanoparticles were then characterized by field emission scanning electron microscopy, ftir spectroscopy, atomic force microscopy and x-ray diffraction. the nanoparticles had a spherical morphology with a diameter of ~ 30 nm. the nanoparticles were electrochemically evaluated as a supercapacitor electrode material by cyclic voltammetry, electrochemical impedance spectroscopy and charge/discharge cycling. the nanoparticles represented both double layer and pseudocapacitive behaviors with a specific capacitance of 77.9 f g− 1 at a charge/discharge current of 1.0 a g− 1. the specific energy and power of the nanoparticles were 13.2 wh g− 1 and 563 w g− 1, respectively. the nanoparticles retained more than 87% of the initial capacitance after 1000 charge/discharge cycles.