Preparation and Characterization of Composite Films of Polypyrrole with Metal Oxide/Hydroxides Using Galvanic Corrosion Reaction

摘要

The interactions of electropolymerized polypyrrole (PPy) films with evaporated aluminum and indium layers were investigated. The apparent occlusion of the metals into the PPy films was induced simply by their storage in air, giving rise to PPy-metal oxide/hydroxides composite films. More important, the composites showed stability against the electrochemical redox cyclings and metal-dependent electric conductivity. The formation of the composite materials was explained by assuming the corrosion reaction that proceeds in the galvanic cells formed between the PPy films and the metals. This assumption was experimentally supported by various control and simulation experiments.