ELABORATION AND STUDY OF THE CAPACITIVE PROPERTIES OF POLYANILINE COMPOSITE FILMS - MIXED OXIDES, NICKEL-COBALT (NI0.6 CO2.4 O4) ELECTROCHEMICALLY SYNTHESIZED ON A PLATINUM ELECTRODE

The design of electrode material for energy production and storage devices is becoming more and more timely in a world where energy is an essential pillar for development. This context urges us to develop and study the capacitive properties of polyaniline composite films – mixed oxide of Ni0.6 Co2.4O4 which can be used as electrode material.In the present study, the mixed oxides of Ni0.6Co2.4O4 were synthesized by the sol gel method via propionic acid. Polyaniline – Ni0.6Co2.4O4 composite films deposited on a platinum substrate (Pt/PANI - Ni0.6Co2.4O4) were prepared by incorporating mixed nickel and cobalt oxide particles into the matrix of polyaniline. This process was realized by chronoamperometry by electropolymerization of the aniline monomer dissolved in a 0.5M HCl electrolyte with different contents of Ni0.6 Co2.4 O4 oxides (0.5 g/L, 1 g/L).Physical and electrochemical characterizations were made with scanning electron microscopy (SEM) coupled with Energy Dispersive Spectroscopy (EDS), UV-visible spectroscopy,X-ray diffraction (XRD) and cyclic voltammetry.SEM, EDS, XRD and UV-visible analyzes confirmed the nature of the synthesized products and the incorporation of Ni0.6Co2.4O4 in the composite films. The electrochemical performance measurements of the Pt/PANI-Ni0.6Co2.4O4 film (1 g/L) give a specific capacity about 386.108 F.g -1, which is much higher than that of the Pt/ PANI, 164.340 F.g -1 at 5 mV/s.