Chemical stability and electrical and mechanical properties of BaZrxCe0.8-xY0.2O3 with CeO2 protection method

Jhe Wei Jhuang, Kan Rong Lee, Jeng-Kuei Chang, Chin Tien Shen, Yi Hsuan Lee, Sheng Wei Lee, Chung Jen Tseng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

This study investigated the decline in the conductivity and mechanical strength after CO2 poisoning and found a new protective method for BaZrxCe0.8-xY0.2O3 proton-conducting electrolyte. The high temperature solid state reaction (SSR) was used in synthesizing electrolyte to naturally generate CeO2 on the surface. A comparison of the oxides in the conductivity decline test revealed that the sample with CeO2 on the surface substantially improved the stability of conductivity, reducing the decline ratio from 56% to 7% for BCY electrolyte and 50% to 7% for BCZY sample. Raman mapping results indicate the naturally generated CeO2 on electrolyte surface can considerably reduce impurity formation and maintain the microstructure of electrolyte. This work demonstrates that samples with CeO2 on the surface effectively protect the BaCeO3-based proton-conducting electrolyte from CO2 poisoning. This method may be applied to similar BaCeO3-based perovskite materials as a new protective method.

Original languageEnglish
Pages (from-to)22259-22265
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume42
Issue number34
DOIs
StatePublished - 24 Aug 2017

Keywords

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

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