Electrochemical Behavior of Polyaniline in the Presence of the Vanadate Anion

Resumo

The chemical and electrochemical syntheses of polyaniline (PANI) were performed in a sulfuric electrolyte in the presence of the vanadate anion (VA). The resulting composite materials based on PANI and VA (PANI–VA) were characterized by IR spectroscopy, X-ray diffractometry, SEM, and elemental analysis. In the electrochemical trials, conditions were indicated under which the composite material retained 96% of its electrochemical capacitance (C) and the cycling of PANI–VA in the range of potentials extended to the anodic and cathodic regions did not lead to the degradation of the polymer material over 50 cycles.