Hybrid electrodes composed of electroactive polymer and metal hexacyanoferrates in aprotic electrolytes

In this work hybrid materials composed of electroactive polymer poly(3,4-ethylenedioxythiophene) (pEDOT) and metal hexacyanoferrates (Mehcf) (Me = Fe, Co, Ni) were tested in ethylene carbonate (EC):propylene carbonate (PC) electrolytes containing 0.5 M KPF6 or 0.5 M LiPF6 salts. The hybrid materials pEDOT/Mehcf were examined by using: cyclic voltammetry (CVA), potentiometry and impedance spectroscopy (IS). The materials pEDOT/Mehcf exhibit electrode activity, good stability and high electrical capacity in tested nonaqueous electrolytes and they are considered to be suitable active materials for supercapacitors or for positive electrode of secondary cell with lithium and potassium salts. Contrary to the solid Prussian Blue “PB” analogues, hybrid pEDOT/Cohcf electrodes work with good efficiency in contact with nonaqueous electrolyte containing lithium salts.