RECENT DEVELOPMENTS IN THE THEORY OF SOLID ELECTROLYTES

In this article we discuss different levels of theoretical description pertaining to the behaviour of solid electrolyte materials with different degrees of complexity. First we present a brief overview on density-functional methods, hopping models and their generalizations and random impedance-networks to illustrate recent theoretical progress both on the microscopic and the macroscopic level. Second, we address the problem of non-Debye relaxation in solid ionic conductors and discuss possible mechanisms based on specific models for atomic hopping. © 1990.