Evolution of the sintering ability, microstructure, and cell performance of Ba0.8Sr0.2Ce0.8-x-yZryInxY0.2O3-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

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Ba0.8Sr0.2Ce0.8-x-yZryInxY0.2O3-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 Ba0.8Sr0.2Ce0.8-x-yZryInxY0.2O3-δ oxides were systemically investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and two probe conductivity analysis. The results reveal that the Ba0.8Sr0.2Ce0.8-x-yZryInxY0.2O3-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 Ba0.8Sr0.2Ce0.8-x-yZryInxY0.2O3-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 Ba0.8Sr0.2Ce0.8-x-yZryInxY0.2O3-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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