Simultaneous Formation of Separate Conducting and Insulating Layers on Aluminum Electrode by Electrolysis

1 January 1999

journal article
Published by The Electrochemical Society in Electrochemical and Solid-State Letters

Vol. 1 (1) , 34-36
https://doi.org/10.1149/1.1390626

Abstract

Two films, conducting (polypyrrole; PPy) and insulating , were successfully formed as separate layers on an electrode by a simple electrochemical oxidation of aluminum metal in aqueous solution which contains pyrrole monomer and an anionic surfactant electrolyte, namely, n‐dodecylbenzenesulfonate. Using a surfactant electrolyte, three layers of thin films ) can be simultaneously formed simply by electrolyzing metal. The formation of layers on electrodes has been confirmed by direct observation (using scanning electron microscopy) and characterized electrochemically. AC impedance spectroscopic analysis demonstrated an excellent impedance‐frequency characteristic for a sample electrolytic capacitor formed from a film. ©1998 The Electrochemical Society

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