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.
Claims9
A solid oxide fuel cell having an oxygen electrode comprising an interpenetrating network of (a) a stabilized zirconia and (b) an electrically-conductive material, optionally having dispersed therein (c) an electrocatalyst different from (b);
- wherein component (b) or (c) comprises (i) a cobaltite of praseodymium, samarium, terbium, or neodymium or (ii) a zirconate-containing reaction product of stabilized zirconia and a cobaltite of praseodymium, samarium, terbium, or neodymium.
Dependencies are inferred from the claim text.