Optimization of a ScCeSZ/GDC bi-layer electrolyte fabrication process for intermediate temperature solid oxide fuel cells

Zeyu Jiang, Abigail L. Snowdon, Abubakr Siddiq, Ahmad El-Kharouf, Robert Steinberger-Wilckens

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Abstract

Cost-effective wet ceramic coating techniques for fabricating ScCeSZ/GDC bi-layer electrolyte anode-supported button cells were investigated in this study. Aqueous ceramic slurries were prepared by ball milling and then used for Ni/ScCeSZ half cell fabrication by tape casting and spin coating. Prepared cells were tested at operating temperature between 700 and 800°C with a fuel composition of hydrogen:nitrogen 3:1 and air at the cathode. The cell with a spin coated GDC film showed the maximum power density of 1.142, 1.012, 0.813 W•cm−2 at 800, 750, and 700°C, respectively. It was also able to produce power output around 0.7 W•cm−2 for 500 h at 750°C, which confirms the cell operational stability. More importantly, the GDC film prepared by spin coating effectively avoided the formation of the (Zr,Ce)O2−based solid solution at the ceria/zirconia interface compared with the other cells with the co-casted and sintered GDC film.
Original languageEnglish
Pages (from-to)32844-32852
Number of pages9
JournalCeramics International
Volume48
Issue number22
Early online date5 Aug 2022
DOIs
Publication statusE-pub ahead of print - 5 Aug 2022

Keywords

  • Anode-supported cell fabrication
  • ScCeSZ/GDC bi-Layer electrolyte
  • Solid oxide fuel cell
  • Spin coating
  • Tape casting

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