Eggshell membrane-templated synthesis of highly crystalline perovskite ceramics for solid oxide fuel cells

Dehua Dong, Yuzhou Wu, Xinyi Zhang, Jianfeng Yao, Yi Huang, Dan Li, Chun-Zhu Li, Huanting Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Highly crystalline perovskite ceramics were templated by an eggshell membrane (ESM) via strong metal-protein bonding. Templated Sm0.5Sr0.5CoO3 (SSC) ceramics retained an interwoven fibrous structure at a temperature up to 1000 degrees C. The use of citric acid-assisted sol-gel coating in the template synthesis greatly enhanced the crystallininty of the ceramic because the sol-gel process ensured the stoichiometric adsorption of ceramic precursors, and it also affected ceramic morphology. The highly crystalline SSC ceramic was used as a cathode material of solid oxide fuel cell (SOFC), and the cathode properties were compared with those prepared with the ceramic synthesized via a conventional combustion method. The maximum power density of the cell made with the templated SSC was 44.5% and 29.8% higher than that made with the combusted SSC at 600 degrees C and 500 degrees C, respectively, because the highly porous cathode constructed with the templated SSC reduced the cell concentration polarization and cathode polarization resistance. This study suggests high-performance perovskite ceramic for SOFC was produced via the template synthesis.

Original languageEnglish
Pages (from-to)1028-1032
Number of pages5
JournalJournal of Materials Chemistry
Volume21
Issue number4
DOIs
Publication statusPublished - 2011
Externally publishedYes

Keywords

  • GEL MINERALIZATION
  • METAL-OXIDES
  • CITRIC-ACID
  • SOFCS
  • NANOTUBES
  • CATHODES
  • FILMS
  • TUBES

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