Electrochemical properties and durability of in-situ composite cathodes with SmBa0.5Sr0.5Co2O5+δ for metal supported solid oxide fuel cells

John T. S. Irvine, Joongmyeon Bae, Jun-Young Park, Won Seok Choi, Jung Hyun Kim

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The electrochemical properties and long-term performance of an in-situ composite cathode comprised of SmBa0.5Sr0.5Co2O5+δ (SBSCO) and Ce0.9Gd0.1O2−δ (CGO91) are investigated for metal supported solid oxide fuel cell (MS-SOFC) application.
The Area Specific Resistance (ASR) of an in-situ composite cathode comprised of 50 wt% of SBSCO and 50 wt% of CGO91 (SBSCO:50) is 0.031 Ω cm2 in the first stage of measurement at 700 °C; this value of ASR increases to 0.138 Ω cm2 after 1000 h. The ASR of SBSCO:50 (in-situ sample at 750 °C) is 0.014 Ω cm2 at the initial stage of measurement; the increase of ASR after 1000 h at 750 °C is only 0.067 Ω cm2. These results suggest that the optimum temperature for in-situ firing of an SBSCO:50 cathode sample of MS-SOFC is higher than 700 °C, ideally around 750 °C.
Original languageEnglish
Pages (from-to)1212-1220
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume42
Issue number2
Early online date17 Nov 2016
DOIs
Publication statusPublished - 12 Jan 2017

Keywords

  • Metal supported solid oxide fuel cell
  • Sr doped layered perovskite
  • Area specific resistance
  • In-situ cathode
  • Sintering effect

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