Hexagonal perovskite derivatives: a new direction in the design of oxide ion conducting materials

Sacha Fop (Corresponding Author), Kirstie S McCombie, Eve J Wildman, Janet M S Skakle, Abbie C. Mclaughlin (Corresponding Author)

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Various structural families have been reported to support oxide ion conductivity; among these, perovskite conductors have received particular attention. The perovskite structure is generally composed of a framework of corner-sharing octahedral units. When the octahedral units share their faces, hexagonal perovskites are formed. Mixed combinations of corner-sharing and face-sharing octahedral units can give rise to a variety of hexagonal perovskite derivatives. However, the ionic conducting properties of these materials have not been well explored. In this feature article, we review the conducting properties of the most significant hexagonal perovskite derivatives, with special focus on Ba3MM'O8.5. Ba3MM'O8.5 is the first hexagonal perovskite derivative to exhibit substantial oxide ion conductivity, and here we outline the structural features that are key for the oxide ion conduction within this system. The results demonstrate that further investigation of hexagonal perovskite derivatives could open up new directions in the design of oxide ion conductors.

Original languageEnglish
Pages (from-to)2127-2137
Number of pages11
JournalChemical Communications
Volume55
Issue number15
Early online date17 Jan 2019
DOIs
Publication statusPublished - 2019

Keywords

  • CRYSTAL-STRUCTURE
  • PHASE-TRANSITIONS
  • CATIONIC VACANCIES
  • TRANSPORT
  • COORDINATION
  • TEMPERATURE
  • MECHANISMS
  • MIGRATION
  • HYDRATION
  • STACKING

Fingerprint Dive into the research topics of 'Hexagonal perovskite derivatives: a new direction in the design of oxide ion conducting materials'. Together they form a unique fingerprint.

Cite this