The effect of anode support on the electrochemical performance of microtubular solid oxide fuel cells fabricated by gel-casting

Research output: Contribution to journalArticlepeer-review

Authors

Colleges, School and Institutes

External organisations

  • DIOPMA, S.L., Parc Científic de Barcelona
  • Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza
  • Universitat de Barcelona

Abstract

Different cell configurations of anode-supported microtubular solid oxide fuel cells (mT-SOFCs) using samaria-doped ceria (SDC) as the electrolyte were fabricated. Several cells were processed varying the porosity and wall thickness (outer diameter) of NiO-SDC tubular supports. Suitable aqueous slurry formulations of NiO-SDC for gel-casting were prepared using agarose, as a gelling agent, and sucrose, as a pore former. The subsequent NiO-SDC anode functional layer (AFL), the SDC electrolyte and the La0.6Sr0.4Co0.2Fe0.8O3-δ-SDC cathode were deposited by spray-coating. Pre-sintering temperatures of the supports were optimized from linear shrinkage curves, thus obtaining after co-sintering, a dense electrolyte without anode-electrolyte delamination. Electrochemical characterization of mT-SOFC cells fabricated by agarose gel-casting is reported by the first time. The cell with a support of 2.6 mm diameter, 380 μm wall thickness, an active area of 1 cm2 and added porosity, using 10 wt% sucrose, achieved a maximum power density of about 400 mW cm-2 at 650°C.

Details

Original languageEnglish
Pages (from-to)39350-39357
Number of pages8
JournalRSC Advances
Volume5
Issue number49
Publication statusPublished - 16 Apr 2015