Electrolytes

J. A. Kilner, John William Richard Druce, Tatsumi Ishihara

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

This chapter discusses fundamental and practical aspects of electrolyte materials for solid oxide fuel cells (SOFCs). We focus on two main families of ceramic electrolytes; those with the fluorite crystal structure (ZrO2- and CeO2-based) and those with perovskite-related structures (La1-xSrxGa1-yMgyO3-(x+y)/2, CaTiO3 and Brownmillerite). Fundamental factors influencing the oxide ionic conductivity are discussed, including the crystal structure, along with strategies to improve the conductivity by substitution with aliovalent cations to introduce extrinsic point defects (oxygen vacancies). Protonic conductivity in perovskite-structured ceramics is also discussed. Finally, we consider some of the alternative materials, including apatite-structured silicates and LAMOX. Although the latter two families are interesting, we highlight some of the challenges to be overcome for their implementation in practical SOFC systems.

Original languageEnglish
Title of host publicationHigh-Temperature Solid Oxide Fuel Cells for the 21st Century
Subtitle of host publicationFundamentals, Design and Applications: Second Edition
PublisherElsevier Inc.
Pages85-132
Number of pages48
ISBN (Print)9780124104532
DOIs
Publication statusPublished - Jan 1 2016

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Solid oxide fuel cells (SOFC)
Perovskite
Crystal structure
Electrolytes
Fluorspar
Apatite
Point defects
Oxygen vacancies
Ionic conductivity
Silicates
Substitution reactions
Positive ions
Oxides

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Kilner, J. A., Druce, J. W. R., & Ishihara, T. (2016). Electrolytes. In High-Temperature Solid Oxide Fuel Cells for the 21st Century: Fundamentals, Design and Applications: Second Edition (pp. 85-132). Elsevier Inc.. https://doi.org/10.1016/B978-0-12-410453-2.00004-X

Electrolytes. / Kilner, J. A.; Druce, John William Richard; Ishihara, Tatsumi.

High-Temperature Solid Oxide Fuel Cells for the 21st Century: Fundamentals, Design and Applications: Second Edition. Elsevier Inc., 2016. p. 85-132.

Research output: Chapter in Book/Report/Conference proceedingChapter

Kilner, JA, Druce, JWR & Ishihara, T 2016, Electrolytes. in High-Temperature Solid Oxide Fuel Cells for the 21st Century: Fundamentals, Design and Applications: Second Edition. Elsevier Inc., pp. 85-132. https://doi.org/10.1016/B978-0-12-410453-2.00004-X
Kilner JA, Druce JWR, Ishihara T. Electrolytes. In High-Temperature Solid Oxide Fuel Cells for the 21st Century: Fundamentals, Design and Applications: Second Edition. Elsevier Inc. 2016. p. 85-132 https://doi.org/10.1016/B978-0-12-410453-2.00004-X
Kilner, J. A. ; Druce, John William Richard ; Ishihara, Tatsumi. / Electrolytes. High-Temperature Solid Oxide Fuel Cells for the 21st Century: Fundamentals, Design and Applications: Second Edition. Elsevier Inc., 2016. pp. 85-132
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