Cathode composition for solid oxide fuel cell
AssigneeThe Dow Chemical Company
InventorsSten A. Wallin, Sunil D. Wijeyesekera
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Abstract
A high performance electrocatalyst is based on transition metal perovskites of praseodymium, samarium, terbium or neodymium which react with YSZ to form a product which is itself active as the cathode in a fuel cell. While PrCoO3 reacts with YSZ, the reaction product(s) do not result in severe degradation of cell performance. A fuel cell made with a cathode composed of only the reaction product of YSZ and PrCoO3 has good performance, indicating that this phase is itself not only a good conductor, but also a good catalyst for oxygen activation.
Claims4
A cathode composition for a solid oxide fuel cell having an anode and a cathode comprising:
- 30-70 percent by weight of an yttria stabilized zirconia;
- and
- dispersed in a substantially uniform manner within the yttria stabilized zirconia, 70-30 percent by weight of a material consisting essentially of:
- (i) a transition metal perovskite of praseodymium, terbium, or neodymium, and (ii) reaction products formed by the sintering of the yttria stabilized zirconia and the transition metal perovskite of praseodymium, terbium, or neodymium.
Dependencies are inferred from the claim text.