Measurement of Oxygen Exchange Kinetics on Thin-Film La[sub 0.6]Sr[sub 0.4]CoO[sub 3−δ] Using Nonlinear Electrochemical Impedance Spectroscopy

The Superior Properties of La0.6Ba0.4CoO3-δThin Film Electrodes for Oxygen Exchange in Comparison to La0.6Sr0.4CoO3-δ

“…It is generally agreed that the oxygen exchange resistance dominates the overall electrode impedance for thin films of the La 1-x Sr x Co 1-y Fe y O 3-δ perovskite family. [40][41][42][43] Therefore, the resistive contribution of the low frequency semicircle is associated with the oxygen exchange reaction at the surface, which is also supported by its time, temperature and pressure dependency shown in the following sections. Accordingly, the surface exchange resistance can already be approximated from the impedance spectra without any detailed fit model.…”

Nonlinear frequency response analysis of PEM fuel cells for diagnosis of dehydration, flooding and CO-poisoning

“…Another nonlinear method descended from EIS is the so called Nonlinear Electrochemical Impedance Spectroscopy (NLEIS), suggested by Darowicki and co-workers in the field of corrosion [34]. The group of Adler and co-workers used NLEIS successfully for the investigation of solid oxide fuel cell cathode materials [35,36]. In their work, measurements at 10 different amplitudes are fitted to a power series, which describes the nonlinearities of the system.…”

A study of external magnetic-field effects on nickel–iron alloy electrodeposition, based on linear and non-linear differential AC electrochemical response measurements

“…So far, different versions of non-linear electrochemical AC spectrometry were applied for studying the corrosion rate [23,24], the electrodeposition of Cu from sulfate solutions in the presence of PEG [25] and solid oxide fuel cell cathode materials [26] as well as for measuring the kinetics of oxygen exchange in thin La 0.6 Sr 0.4 CoO 3Àd films [27] and for the analysis of some electrochemical properties of industrial lubricants [28]. It was shown in [23][24][25][26][27][28] that the non-linear electrochemical AC spectrometry is a useful technique for characterizing processes such as electrochemical reactions, diffusion or adsorption processes.…”

“…It was shown in [23][24][25][26][27][28] that the non-linear electrochemical AC spectrometry is a useful technique for characterizing processes such as electrochemical reactions, diffusion or adsorption processes. These processes are usually non-linear; therefore useful information can be obtained by analysing the higher harmonics of the signals.…”

“…However, by analysing also the higher harmonics of the current response, one can obtain more insightful information about the voltage-current transfer function (the generalised, non-linear analog of impedance). It was shown in [23][24][25][26][27][28] that the non-linear transfer function could offer some advantages when compared to the linear impedance. Thus, unique and more accurate information regarding the electrochemical processes can be obtained by non-linear AC spectrometry in comparison to the linear EIS.…”