INTERFACIAL PROCESSES IN SOLID-STATE STRUCTURES INVOLVING LANTHANUM FLUORIDE SINGLE-CRYSTALS

Dynamic voltammetry was used to determine the regions of electrochemic al slability of LaF3/Me interfaces, which depend on the metal and are confined by faradaic processes, viz, fluorination of the metals and re duction of lanthanum ions in the solid electrolyte. Oxygen was found t o influence the interfacial processes. The generation of oxygen compou nds during anodic polarization is either coupled to fluoride formation or constitutes an alternative to fluoride formation. The reduction of lanthanum ions during cathodic polarization may be masked by oxygen r eduction near -1 V.