Bond layer for a solid oxide fuel cell, and related processes and devices
AssigneeGeneral Electric Company
InventorsJian Wu, Todd-Michael Striker, Stephane Renou, Simon William Gaunt
Life of this patent
Estimating the term…
Abstract
An electrically-conductive layer of material having a composition comprising lanthanum and strontium is described. The material is characterized by a microstructure having bimodal porosity. Another concept in this disclosure relates to a solid oxide fuel cell attached to at least one cathode interconnect by a cathode bond layer. The bond layer includes a microstructure having bimodal porosity. A fuel cell stack which incorporates at least one of the cathode bond layers is also described herein, along with related processes for forming the cathode bond layer.
Claims22
A solid oxide fuel cell attached to at least one cathode interconnect by a cathode bond layer, wherein the bond layer comprises a micro structure having bimodal porosity.
A method for the formation of a cathode bond layer for a solid oxide fuel cell, comprising the steps of
- (a) combining a cathode bond paste material with at least one solvent and at least one pore-forming agent, to form a bond paste mixture;
- wherein the cathode bond paste material comprises particles having an average particle size in the range of about 0.1 micron to about 0.4 micron;
- (b) applying the bond paste mixture to a substrate;
- and
- (c) heat-treating the applied bond paste mixture at a temperature of at least about 650° C.,
- so as to remove substantially all volatile content from the mixture, and to cause the formation of a microstructure having bimodal porosity, with a total porosity of at least about 50 volume %.
An electrically-conductive layer of material having a composition comprising lanthanum and strontium, and characterized by a micro structure having bimodal porosity.
A solid oxide fuel cell stack, comprising a plurality of solid oxide fuel cells attached to each other, wherein a cathode bond layer connects a cathode interconnect to a cathode for each adjacent fuel cell;
- and said cathode bond layer comprises a microstructure having bimodal porosity.
Dependencies are inferred from the claim text.