Ba1−xSrxCe0.8−yZryY0.2O3−Δ protonic electrolytes synthesized by hetero-composition-exchange method for solid oxide fuel cells

Kan Rong Lee, Chung Jen Tseng, Jeng-Kuei Chang, Kuan Wen Wang, Yu Shuo Huang, Tzu Chi Chou, Kuo Chuang Chiu, Li Duan Tsai, Sheng Wei Lee*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

This study reports the synthesis of proton-conducting Ba0.8Sr0.2Ce0.6Zr0.2Y0.2O3−δ oxides by using a combination of the sol–gel process and hetero-composition-exchange technique. The experimental results show that the sintered Ba0.8Sr0.2Ce0.6Zr0.2Y0.2O3−δ pellet synthesized by the hetero-composition-exchange method exhibits excellent sinterability, good relatively density, and high protonic conduction. Furthermore, the Pt/electrolyte/Pt single cell with such an electrolyte shows a significantly higher maximum power density as compared to those oxides prepared from conventional sol–gel powders. Based on the experimental results, we attempt to explain the improvement mechanism in terms of as-calcined particle characteristics and proton hopping distance. This work shows that the Ba1−xSrxCe0.8−yZryY0.2O3−δ oxides synthesized by the sol–gel combined with hetero-composition-exchange method would be a promising electrolyte for H+-SOFC applications. More importantly, this new fabrication approach could be applied to other similar perovskite-type electrolyte systems.

Original languageEnglish
Pages (from-to)22222-22227
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume42
Issue number34
DOIs
StatePublished - 24 Aug 2017

Keywords

  • BaSrCeZrYO
  • Chemical stability
  • Ionic conductivity
  • Proton-conducting electrolyte
  • Solid oxide fuel cells

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