The Effect of Ni, Cr, V and Zn Substitution on the Electrochemical Properties of Spinel Ferrites

Abstract

Spinel ferrite nano-particles, promising electrode materials for redox capacitors, were prepared with the chemical coprecipitation technique. In this work, the effects of x value on electrochemical properties of Zn_xFe_3-xO₄, Ni_xFe_3-xO₄, Cr_xFe_3-xO₄, (V_1/3Zn_2/3)_x Fe_3-xO₄ and V_xFe_3-xO₄ spinel ferrite electrodes were investigated. Additionally, the effects of occupied site and valence of Fe ion in spinel structure on capacitance were discussed. The results show that capacitance of the spinel ferrites increased with an increase in Fe²⁺ ion in 16d site of spinel structure.