Solid State Ionics, Vol.176, No.25-28, 1997-2003, 2005
Impedance spectroscopy at interfaces of metals and aqueous solutions -Surface roughness, CPE and related issues
The interfacial impedance of solid electrodes deviates from that of an ideal capacitor even in the complete absence of Faradaic reactions; the deviation is usually larger on rough electrodes than on smooth ones. The origin of this deviation is discussed; the roles of atomic scale roughness and of the adsorption processes are analyzed. (c) 2005 Elsevier B.V. All rights reserved.
Keywords:interfacial impedance;surface roughness;capacitance dispersion;constant phase element;non-Faradaic process;adsorption process;porous electrode;fractal