Formation of conductive oxide scale on 33NK and 47ND interconnector alloys for solid oxide fuel cells

V. A. Eremin, A.A. Solodyankin, S.A. Belyakov, A.V. Khodimchuk, A.S. Farlenkov, D.A. Krainova, N.S. Saetova, Anton V. Kuzmin, A.S. Artamonov, Robert Steinberger-Wilckens, Maxim V. Ananyev

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Abstract

Two grades of chromium‐free alloys were studied in order to apply them as
interconnectors for solid oxide fuel cells. The surface modification methods were proposed for each alloy with the purpose of forming of oxide scales considering the required physicochemical properties. Investigations of the structure and properties of the obtained oxide scales were performed and the efficiency of the chosen surface modification methods was approved. The samples with the surface modification exhibited higher conductivity values in comparison with the
nonmodified samples. A compatibility study of samples with surface modification and glass sealant of chosen composition was accomplished. The modified samples demonstrated good adhesion during testing and electrical resistance less than 40 mOhm/cm2 at 850 °C in air, which allowed us to
recommend these alloys with respective modified oxide scales as interconnectors for SOFC.
Original languageEnglish
Article number4795
Pages (from-to)1-17
Number of pages17
JournalEnergies
Volume12
Issue number24
DOIs
Publication statusPublished - 16 Dec 2019

Keywords

  • steel-interconnector
  • oxide scale
  • electrical resistance
  • solid oxide fuel cells (SOFC)
  • electrocrystallization
  • glass sealant

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