Scaling up aqueous processing of A-site deficient strontium titanate for SOFC anode supports

Maarten C. Verbraeken*, Bhaskar Reddy Sudireddy, Viacheslav Vasechko, Mark Cassidy, Tania Ramos, Jürgen Malzbender, Peter Holtappels, John T.S. Irvine

*Corresponding author for this work

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Abstract

All ceramic anode supported half cells of technically relevant scale were fabricated in this study, using a novel strontium titanate anode material. The use of this material would be highly advantageous in solid oxide fuel cells due to its redox tolerance and resistance to coking and sulphur poisoning. Successful fabrication was possible through aqueous tape casting of both anode support and electrolyte layers and subsequent lamination. Screen printing of electrolyte layers onto green anode tapes was also attempted but resulted in cracked electrolyte layers upon firing. Microstructural, electrical and mechanical properties of anode supports and half cells will be discussed. The use of two different commercial titanate powders with nominal identical, but in reality different stoichiometries, strongly affect electrical and mechanical properties. Careful consideration of such variations between powder suppliers, and batches of the same supplier, is critical for the successful implementation of ceramic anode supported solid oxide fuel cells.
Original languageEnglish
JournalJournal of the European Ceramic Society
Volume38
Issue number4
Pages (from-to)1663-1672
ISSN0955-2219
DOIs
Publication statusPublished - 2018

Keywords

  • Solid oxide fuel cells
  • Alternative anodes
  • Perovskites
  • Tape casting
  • Co-firing

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