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Characterization of Electrochemical Properties of Micro-Tubular SOFCs

[+] Author Affiliations
Kevin V. Galloway, Nigel M. Sammes, Jung-Hoon Song

Colorado School of Mines, Golden, CO

Paper No. FuelCell2008-65260, pp. 93-96; 4 pages
  • ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology
  • ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology
  • Denver, Colorado, USA, June 16–18, 2008
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4318-1 | eISBN: 0-7918-3822-6
  • Copyright © 2008 by ASME


Micro-tubular Solid Oxide Fuel Cells (SOFCs) are fabricated and tested for analysis of electrochemical properties. The impedance spectra from individual 1.8 mm diameter, 1.2 cm length micro-tubular SOFCs are obtained for the intermediate temperature range of 450–550°C. The micro-tubular SOFC used is anode supported, consisting of a NiO and Gd0.2 Ce0.8 O2−x (GDC) cermet anode, thin GDC electrolyte, and a La0.6 Sr0.4 Co0.2 Fe0.8 O3−y (LSCF) and GDC composite cathode. The impedance information gained at cell operating temperatures of 450, 500, and 550°C yielded power density losses of 0.8, 2.3, and 4.6% respectively. Within the operating temperature range of 450–550 °C, the ceria based 1.8 mm micro-tubular SOFCs were found to have a power densities ranging between 180–740 mW/cm2 .

Copyright © 2008 by ASME



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