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

L Malavasi, C A J Fisher, M Saiful Islam

Research output: Contribution to journalArticle

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Abstract

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 mechanisms to the conventional materials. It is concluded that the rich chemistry of these important systems provides diverse possibilities for developing superior ionic conductors for use as solid electrolytes in fuel cells and related applications. In most cases, a greater atomic-level understanding of the structures, defects and conduction mechanisms is achieved through a combination of experimental and computational techniques (217 references).
LanguageEnglish
Pages4370-4387
Number of pages18
JournalChemical Society Reviews
Volume39
Issue number11
DOIs
StatusPublished - Nov 2010

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Oxides
Electrolytes
Protons
Solid electrolytes
Ions
Silicates
Apatites
Proton conductivity
Fluorspar
Defect structures
Solid oxide fuel cells (SOFC)
Fuel cells
Crystalline materials
Defects
molybdate
perovskite

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Oxide-ion and proton conducting electrolyte materials for clean energy applications: structural and mechanistic features. / Malavasi, L; Fisher, C A J; Islam, M Saiful.

In: Chemical Society Reviews, Vol. 39, No. 11, 11.2010, p. 4370-4387.

Research output: Contribution to journalArticle

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