Potential Specific Capacitance in Layered Nickel Ferrite Electrochemical Supercapacitors

Nickel ferrite electrodes for electrochemical supercapacitors were made from a successive ionic layer adsorption and reaction (SILAR) chemical method. Their structural elucidation and morphological evolution studies were made and further investigated in electrochemical cyclic-voltammetry characteristic measurement. Face-centered cubic crystal structure of nickel ferrites composed of several irregular islands is confirmed. Brief flow chart is discussed for clear in-depth understanding of the formation nickel ferrite. Due to a significant reversible pseudocapacitive contribution nickel ferrite electrochemical supercapacitor contributes 555.5 F/g specific capacitance at 2 mV/s. Electrochemical impedance analysis measurement, along with an equivalent circuit details, is also provide for understanding the charge transport kinetics across various interfaces.