Electropolymerization of polypyrrole at the three-phase interline: Influence of polymerization conditions

► Free-standing PPy film is prepared by a dynamic three-phase-interline electropolymerization (D3PIE) process. ► Influences of polymerization conditions on the formation and morphology of film were specified. ► A simple model of describing the filming kinetics was established. ► The polypyrrole prepared by the D3PIE method appears to be a promising capacitor material.