Callaghan Innovation Research Papers

Back to Research Papers

TitleFabrication and properties of Ce0.8Gd0.2O1.9 electrolyte-based tubular solid oxide fuel cells
Publication TypeJournal Article
Year of Publication1999
AuthorsHatchwell, C., Sammes N.M., and Brown I.W.M.
JournalSolid State Ionics
Pagination201 - 208
Date Published1999
ISSN01672738 (ISSN)
KeywordsBinders, Ceria, Cerium compounds, Commercial water based binder system, Current density, Electric potential, Electrodes, Extrusion, Fuel cells, Heat treatment, Solid electrolytes, Solid oxide fuel cells, Surfaces, Tubular electrolytes
AbstractA general procedure for the extrusion of Ce0.8Gd0.2O1.9 tubular electrolytes is detailed. Using a commercial water-based binder system, Ce0.8Gd0.2O1.9 was extruded, then fired at 1600°C to form high-density electrolyte tubes (98% relative to theoretical). Heat-treatment of the Ce0.8Gd0.2O1.9 powder at 900°C for 4 h yielded tubes that were highly dense with a smooth surface finish, while non heat-treated powders resulted in an extrusion that was less dense with poor surface finish. Electrodes were applied and the tubular SOFC was electrically tested. A good open circuit voltage of 0.911 V was achieved for the cell, however a poor operating current density of 0.0123 A/cm2 at 0.7 V was obtained. The results demonstrate the potential of fabricating and operating tubular SOFCs.

Back to top