US 12,034,168 B2 · Composite of cobalt-based perovskite material with negative thermal expansion material, and preparation method of same, and solid oxide fuel cell comprising same

Abstract

The present invention relates to a composite of a cobalt-based perovskite material with a negative thermal expansion material, and a preparation method of the same, and a solid oxide fuel cell (SOFC) comprising the same, and belongs to the technical field of fuel cells. In the present invention, a negative thermal expansion material is introduced into a cobalt-based perovskite oxide to successfully prepare an SOFC cathode material with excellent electrochemical performance and low thermal expansivity. The composite electrode achieves prominent mechanical tolerance in SOFC, which can moderate a volume change during the whole calcination process and enable a smooth transition to a high-temperature stage. The composite electrode has a thermal expansion coefficient (TEC) only of 12.9×10−6 K−1, which is perfectly matched with that of an SDC electrolyte. In addition, the composite shows excellent oxygen reduction reaction (ORR) activity, high TEC, and extremely-excellent anti-CO2 poisoning performance.

Claims5

Dependent claims

A preparation method of a composite of a cobalt-based perovskite material with a negative thermal expansion material, wherein the composite of the cobalt-based perovskite material with the negative thermal expansion material is obtained by combining the negative thermal expansion material with the cobalt-based perovskite material;

the negative thermal expansion material is Y2W3O12, and the cobalt-based perovskite material is SrNb0.1Co0.9O3-δ;
and
the preparation method comprises the following steps:
mixing the negative thermal expansion material and the cobalt-based perovskite material to obtain a precursor material, and subjecting the precursor material to calcination;
wherein a content of the negative thermal expansion material in the precursor material is 5 wt % to 40 wt %;
and
the calcination is conducted at 600° ° C. to 1,000° ° C. for 1 h to 6 h.

4 more elements

Dependencies are inferred from the claim text.

Composite of cobalt-based perovskite material with negative thermal expansion material, and preparation method of same, and solid oxide fuel cell comprising same

Life of this patent

Composite of cobalt-based perovskite material with negative thermal expansion material, and preparation method of same, and solid oxide fuel cell comprising same

Life of this patent

Abstract

Claims5