Anode Supported Thin Zirconia Based Cells for Intermediate Temperature SOFC

Ni-YSZ anode supports show a fundamentally different microstructure from screenprinted Ni-YSZ anodes on YSZ electrolyte supports. Of high density and composed of fine zirconia and nickel oxide to allow for cofiring with a thin zirconia electrolyte film (5 µm), the anode support shows advantages of adequate strength and increased electrochemical activity probably not only limited to the TPB, unlike screen printed porous anodes. Areas up to 100 cm2 have been fabricated. Electrochemical cell testing produced results of >80% fuel utilisation, 35% electrical efficiency and >20 W at 800°C using hydrogen fuel. Unusually high ohmic loss (*3 x theoretical) on supported cells is consistently observed. The smallest loss is measured when employing thin dense cathodes of a mixed conducting material. Overall cell performance (at *800 °C) is more determined by the cathode than by the anode support.

Published in:
Proceedings of the 7th International Symposium on Solid Oxide Fuel Cells, 2001-16, 1002-1011
Presented at:
7th Intnl. Symposium on SOFC, Tsukuba, Japan, June 2001
Pennington, NJ (USA), The Electrochemical Society

Note: The status of this file is: Involved Laboratories Only

 Record created 2005-08-08, last modified 2018-03-17

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