Effect of infiltrate solution additives on samarium strontium cobaltite-cerium gadolinium oxide nano-composite SOFC cathodes

J. D. Nicholas, S. A. Barnett

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Nano-composite SSC (Sm0.5Sr0.5CoO3-x)-GDC (Ce0.9Gd0.1O1.95) Solid Oxide Fuel Cell cathodes were produced by infiltrating SSC nitrate solutions with/without additives into GDC scaffolds. X-ray diffraction indicated that fired precursor solutions containing the surfactant Triton X-100 had less secondary phases than similarly processed pure nitrate solutions. Further, precursor solutions containing citric acid, a chelating agent, produced nearly phase-pure SSC after 1 hour at 800°C These solution additives did not have a large effect on the cathode polarization resistance. In contrast, alterations of the infiltration procedure influenced the SSC nano-particle size and hence the polarization resistance. Polarization resistances of 0.1 Ω·cm2 at 600°C were achieved with a single infiltration of concentrated solution. Polarization resistance predictions made using microstructural observations and a modified Tanner, Fung, Virkar model were found to be within 40% (without fitting parameters) of the experimentally measured values, regardless of the testing temperature, cathode thickness, solution additives, and cathode synthesis conditions.

Original languageEnglish (US)
Title of host publicationECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)
Pages2435-2442
Number of pages8
Edition2 PART 3
DOIs
StatePublished - Dec 1 2009
Event11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting - Vienna, Austria
Duration: Oct 4 2009Oct 9 2009

Publication series

NameECS Transactions
Number2 PART 3
Volume25
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting
Country/TerritoryAustria
CityVienna
Period10/4/0910/9/09

ASJC Scopus subject areas

  • Engineering(all)

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