Mixed ions-electrons conducting

Kavan, L. Dousek, F.P. Micka, K. The role of ion transport in the electrochemical corrosion of fluoropolymers. Preparation and properties of n-doped polymeric carbon with mixed ion/electron conductivity. Solid State Ionics 1990, 38. 109-118. 

As was shown in Chap. 4, the behaviour of real electrochemical systems on long timescales cannot often be predicted from short-term observations. In terms of the approach considered in 1.6, this happens because of the onset of positive feedbacks destabilising the stationary state of the system. Several possible reasons exist for this event to take place. Among them, most significant, however very rarely considered, is the coupling between the electrochemical processes at separate electrodes. To understand how it works, we shall first consider the process of electrochemical decomposition of an electrolyte with mixed ion-electron conductivity. 

After definite time (from 10 min up to several hours depending on the current, composition and temperature), the process becomes unsteady which causes the nonlinear oscillations of voltage (Fig. 6.35). As we already know (see Chaps. 4 and 5), such behaviour is often observed in electrochemical film systems with mixed ion-electron conductivity of the film. 

Spallina, V., Melchiori, T., Gallucci, F., and van Sint Annaland, M. (2015) Auto-thermal reforming using mixed ion-electronic conducting ceramic membranes for a small-scale H2 production plant. Molecules, 20 (3), 4998-5023. 

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