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 ZnxFe3-xO4, NixFe3-xO4, CrxFe3-xO4, (V1/3Zn2/3)x Fe3-xO4 and VxFe3-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.
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