“Solid state ionics” is a field involving the study of the phenomena of ions in solids, especially solids which exhibit high ionic conductivities at fairly low temperatures below their melting points.
High conductivity solid cationic conductors found so far are monovalent cation conductors such as hydrogen-, lithium-, sodium-, potassium-, silver- and copper (I) -ion conductors. High conductivity anionic conductors, the charge carriers in which are halide- and oxide-ion have been found.
These conductors have been found in stoichiometric compounds having ionic disordered phases and nonstoichiometric compounds or solid solutions posessing high intrinsic or extrinsic ionic vacancy concentrations.
In this paper, these solid ion conductors are reviewed.
