Tailoring the chemical stability of cobalt-rich perovskite mixed conductor

Fang Wang, Koki Igarashi, Takashi Nakamura, Keiji Yashiro, Junichiro Mizusaki, Koji Amezawa

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

In this paper we try to tailor the chemical stability of cobalt-rich perovskite Ba0.5Sr0.5Co0.8Fe0.2O3 - δ (BSCF) by B-site doping Sb. The chemical stability of Ba0.5Sr0.5Co0.8Fe0.1Sb0.1O3 - δ (BSCFS) was investigated by studying the oxygen nonstoichiometry, crystal structure and oxidation state by means of coulometric titration, high-temperature X-ray diffraction (HT-XRD) and soft-X-ray absorption spectroscopy (s-XAS) in various oxygen pressure (p(O2)) and temperatures. The results prove that chemical stability of BSCFS is successfully improved in intermediate temperature solid oxide fuel cell working condition owing to Co valence change which is controlled by high valence cation doping.

Original languageEnglish
Pages (from-to)2-5
Number of pages4
JournalSolid State Ionics
Volume288
DOIs
Publication statusPublished - 2016 May 1

Keywords

  • BSCF
  • Chemical stability
  • Oxygen nonstoichiometry
  • Soft XAS

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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