Oxide-ion and proton conducting electrolyte materials for clean energy applications: structural and mechanistic features

This critical review presents an overview of the various classes of oxide materials exhibiting fast oxide-ion or proton conductivity for use as solid electrolytes in clean energy applications such as solid oxide fuel cells. Emphasis is placed on the relationship between structural and mechanistic features of the crystalline materials and their ion conduction properties. After describing well-established classes such as fluorite- and perovskite-based oxides, new materials and structure-types are presented. These include a variety of molybdate, gallate, apatite silicate/germanate and niobate systems, many of which contain flexible structural networks, and exhibit different defect properties and transport…

• CI
  Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali
• EA
  Engineering and Physical Sciences Research Council