Nanostructured Gd-CeO 2 electrolyte for solid oxide fuel cell by aqueous tape casting

A. Akbari-Fakhrabadi, R. V. Mangalaraja, Felipe A. Sanhueza, Ricardo E. Avila, S. Ananthakumar, S. H. Chan

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Gadolinia-doped ceria (Ce 0.9Gd 0.1O 1.95, GDC) electrolyte was fabricated by aqueous-based tape casting method for solid oxide fuel cells (SOFCs). The ceramic powder prepared by combustion synthesis was used with poly acrylic acid (PAA), poly vinyl alcohol (PVA), poly ethylene glycol (PEG), Octanol, 2,4,7,9-tetramethyl-5-decyne-4,7-diol ethoxylate and double distilled water as dispersant, binder, plasticizer, defoamer, surfactant and solvent respectively, to prepare stable GDC slurry. The conditions for preparing stable GDC slurries were studied and optimized by sedimentation, zeta potential and viscosity measurements. Green tapes with smooth surface, flexibility, thickness in the range of 0.35-0.4 mm and 45% relative green density were prepared. Conventional and flash sintering techniques were used and compared for densification which demonstrated the possibility of surpassing sintering at high temperatures and retarding related grain growth.

Original languageEnglish
Pages (from-to)307-312
Number of pages6
JournalJournal of Power Sources
Volume218
DOIs
StatePublished - 15 Nov 2012
Externally publishedYes

Keywords

  • Aqueous tape casting
  • Electrolyte
  • Flash sintering
  • GDC
  • SOFC

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