Solid-state electrochemical reactions

Although the SOFC community has generally maintained an empirical approach to the three-phase boundary longer than the aqueous and polymer literature, the last 20 years have seen a similar transformation of our understanding of SOFC cathode kinetics. Few examples remain today of solid-state electrochemical reactions that are not known to be at least partially limited by solid-state or surface diffusion processes or chemical catalytic processes remote from the electrochemical—kinetic interface. 

The relevant point to emphasize is that this model allows one to justify the existence of solid-state electrochemical reactions. Remarkably, the redox conductivity is maintained even in the limiting cases where electron diffusion or cation diffusion are hindered. Here, the electrochemical reaction may progress via surface diffusion along the external layer of the particle in contact, respectively, with the electrode and the electrolyte. 

Lovric, M., Hermes, M., and Scholz, F. 2000. Solid state electrochemical reactions in systems with miscibility gaps. Journal of Solid State Electrochemistry, 4, 394-401. 

Many electrochemical conversions of solid compounds and materials, including for example the corrosion of metals and alloys or the electrochemical conversions of most battery materials, take place within a liquid electrolyte environment, with the classic approach to investigation comprising macro-sized electrodes. However, in order to obtain a comprehensive understanding ofthe mechanism ofthese solid-state electrochemical reactions, the simple technique of immobilizing small amounts of a solid compound/material on an inert electrode surface provides an easy, yet sometimes exclusive, access to their study. In this chapter is presented a survey of the recent developments of this approach, which is referred to as the voltammetry of immobilized microparticles (VIM). Attention is also focused on progress in the field of theoretical descriptions of solid-state electrochemical reactions. 

Solid-State Electrochemical Reactions of Electroactive Microparticles and Nanoparticles... 

During a solid-state electrochemical reaction of microparticles (but also of adhered... 

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