Review on zirconate-cerate-based electrolytes for proton-conducting solid oxide fuel cell

Nur Lina Rashidah Mohd Rashid, Abdullah Abdul Samat, Abdul Azim Jais, Mahendra Rao Somalu, Andanastuti Muchtar, Nurul Akidah Baharuddin, Wan Isahak Wan Nor Roslam

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The performance of low-to-intermediate temperature (400–800 °C) solid oxide fuel cells (SOFCs) depends on the properties of electrolyte used. SOFC performance can be enhanced by replacing electrolyte materials from conventional oxide ion (O2-) conductors with proton (H+) conductors because H+ conductors have higher ionic conductivity and theoretical electrical efficiency than O2- conductors within the target temperature range. Electrolytes based on cerate and/or zirconate have been proposed as potential H+ conductors. Cerate-based electrolytes have the highest H+ conductivity, but they are chemically and thermally unstable during redox cycles, whereas zirconate-based electrolytes exhibit the opposite properties. Thus, tailoring the properties of cerate and/or zirconate electrolytes by doping with rare-earth metals has become a main concern for many researchers to further improve the ionic conductivity and stability of electrolytes. This article provides an overview on the properties of four types of cerate and/or zirconate electrolytes including cerate-based, zirconate-based, single-doped cerate–zirconate and hybrid-doped cerate–zirconate. The properties of the proton electrolytes such as ionic conductivity, chemical stability and sinterability are also systematically discussed. This review further provides a summary of the performance of SOFCs operated with cerate and/or zirconate proton conductors and the actual potential of these materials as alternative electrolytes for proton-conducting SOFC application.

Original languageEnglish
JournalCeramics International
DOIs
Publication statusAccepted/In press - 1 Jan 2019

Fingerprint

Solid oxide fuel cells (SOFC)
Electrolytes
Protons
Ionic conductivity
Rare Earth Metals
Hydrogen
Chemical stability
Oxides
Rare earths
Doping (additives)
Ions
Temperature

Keywords

  • Cerate-ziconate-based electrolyte
  • Chemical stability
  • Ionic conductivity
  • Proton-conducting fuel cell
  • Sinterability

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Review on zirconate-cerate-based electrolytes for proton-conducting solid oxide fuel cell. / Rashid, Nur Lina Rashidah Mohd; Samat, Abdullah Abdul; Jais, Abdul Azim; Somalu, Mahendra Rao; Muchtar, Andanastuti; Baharuddin, Nurul Akidah; Wan Nor Roslam, Wan Isahak.

In: Ceramics International, 01.01.2019.

Research output: Contribution to journalArticle

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