Currently, there is a need to develop new devices capable of storing energy, which arelightweight, flexible and friendly to the environment. In this paper we present the synthesisand characterization of cassava starch films and polypyrrole films, which were used in thedevelopment of an electrochemical battery. The starch films were synthesizedchemicallyfrom native cassava starch adding plasticizers and lithium perchlorate. Moreover, polypyrrolefilms were doped with p-toluenesulfonic acid (pTS) and Indigo Carmin (IC) and synthesizedelectrochemically in an electrochemical cell of three electrodes (working, reference andauxiliary). The characterization was carried out using electrochemical techniques of cyclicvoltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results indicateexcellent electrochemical behavior of starch films with conductivities of approximately 3x10-3 S ...