Bonding character and ionic conduction in solid electrolytes

• Published in: Pure and applied chemistry Vol. 91; no. 11; pp. 1797 - 1806
• Main Author: Aniya, Masaru
• Format: Journal Article
• Language: English
• Published: Berlin De Gruyter 01.11.2019; Walter de Gruyter GmbH
• Subjects: bond fluctuation model; chemical bonding; Chemical bonds; Chemistry; Conductors; elastic constants; Elastic properties; glasses; Ion currents; Ions; medium range structure; Molten salt electrolytes; non-Arrhenius ionic conductivity; Solid electrolytes; SSC-2018; superionic conductors
• ISSN: 0033-4545; 1365-3075
• DOI: 10.1515/pac-2018-1220

The properties of the materials are intimately related to the nature of the chemical bond. Research to explain the peculiarities of superionic materials by focusing on the bonding character of the materials is presented. In particular, a brief review of some fundamental aspects of superionic conductors is given based on the talk presented at “Solid State Chemistry 2018, Pardubice” in addition to some new results related to the subject. Specifically, the topics on bond fluctuation model of ionic conductors, the role of medium range structure in the ionic conductivity, bonding aspects of non-Arrhenius ionic conductivity and elastic properties of ionic conductors are discussed. Key concepts that are gained from these studies is stressed, such as the importance of the coexistence of different types of bonding, and the role of medium range structure in glasses for efficient ionic transport in solids. These concepts could help the development of new materials.