Impedance Response of a Thin Film on an Electrode: Deciphering the Influence of the Double Layer Capacitance

The different contributions of the interfacial capacitance are identified in case passive materials or thin protective coatings deposited on electrode surface. method is based a graphical analysis EIS results to determine both passive-film high-frequency domain and double-layer low-frequency domain. proposed shown be independent physicochemical origins frequency dispersion capacitances which results, from an point view experimental use constant-phase element However, for correct evaluation thin-film properties such as its thickness, data must corrected contribution. In particular, it that if gives frequency-dispersed response, necessary part elements. This first demonstrated synthetic then used determination thickness oxide film formed Al neutral pH solution.