Evolution of the sintering ability, microstructure, and cell performance of Ba 0.8 Sr 0.2 Ce 0.8-x-y Zr y In x Y 0.2 O 3-δ (x = 0.05, 0.1 y = 0, 0.1) proton-conducting electrolytes for solid oxide fuel cell

Kai Ti Hsu*, Yu Jing Ren, Han Wen Chen, Pei Hua Tsai, Jason Shian Ching Jang, Chi Shiung Hsi, Jing Chie Lin, Jeng-Kuei Chang, Sheng Wei Lee, I. Ming Hung

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Ba 0.8 Sr 0.2 Ce 0.8-x-y Zr y In x Y 0.2 O 3-δ (x = 0.05, 0.1 y = 0, 0.1) proton-conducting oxides are prepared using a solid state reaction process. The effect of indium contents on the microstructures, chemical stability, electrical conductivity, and sintering ability of these Ba 0.8 Sr 0.2 Ce 0.8-x-y Zr y In x Y 0.2 O 3-δ oxides were systemically investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and two probe conductivity analysis. The results reveal that the Ba 0.8 Sr 0.2 Ce 0.8-x-y Zr y In x Y 0.2 O 3-δ oxides are cubic perovskite crystal structure without second phase. Surface morphology of 1450°C, 4 h sintered oxides shows a dense microstructure. The optimum conductivity of Ba 0.8 Sr 0.2 Ce 0.8-x-y Zr y In x Y 0.2 O 3-δ oxide is 0.011 S/cm measured at 800°C. Chemical stability of the oxides to resist CO2 at 600°C is effectively improved by doping 0.1 at%indium or more. In addition, the laminated electrolyte and anode layers which fabricated by tape casting were co-sintered at 1450°C for 4 h. The sintered half-cell coated with Pt paste as cathode was used for IV curve performance testing. The performance of the single cell of anode supported protonsolid oxide fuel cell (P+-SOFC) have powder density of 139.8mW/cm at 800°C. Therefore, the Ba 0.8 Sr 0.2 Ce 0.8-x-y Zr y In x Y 0.2 O 3-δ ceramic is suggested to be a potential electrolyte material for P+-SOFC applications.

Original languageEnglish
Pages (from-to)193-198
Number of pages6
JournalJournal of the Ceramic Society of Japan
Volume123
Issue number1436
DOIs
StatePublished - 1 Apr 2015

Keywords

  • Chemical stability
  • Electrical conductivity
  • Electrolyte
  • Indium doping
  • Sintering
  • Solid oxide fuel cells

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