Back to results
US 6,958,196 B2Granted
Porous electrode, solid oxide fuel cell, and method of producing the same
AssigneeThe Trustees of the University of Pennsylvania
InventorsRaymond J. Gorte, John M. Vohs
Life of this patent
Estimating the term…
Abstract
The present invention generally relates to porous electrodes for use in solid oxide fuel cells, whereby the electrodes are comprised primarily of ceramic material and electronically conductive material. The electrodes are prepared by impregnating a porous ceramic material with precursors to the electronically conducting material.
Claims44
A cathode comprising:
- a porous ceramic material;
- and
- at least an electronically conducting material dispersed at least partially within the pores of the porous ceramic material,
- wherein the porous ceramic material includes a plurality of pores having an average pore size of at least about 0.5 μm,
- wherein the cathode is prepared by sintering the porous ceramic material first, and contacting the sintered porous ceramic material with a solution containing an oxide of the electronically conducting material,
- and wherein the cathode has a higher electrical conductivity at a lower concentration of electronically conducting material, when compared to a cathode prepared by sintering both the porous ceramic material and electronically conducting material without sintering the porous ceramic material first.
3 more elements
A cathode comprising:
- a porous ceramic material;
- and
- at least an electronically conducting material dispersed at least partially within the pores of the porous ceramic material,
- wherein the cathode has a porosity within the range of from about 10% to about 75%,
- wherein the cathode is prepared by sintering the porous ceramic material first, and contacting the sintered porous ceramic material with a solution containing an oxide of the electronically conducting material,
- and wherein the cathode has a higher electrical conductivity at a lower concentration of electronically conducting material, when compared to a cathode prepared by sintering both the porous ceramic material and electronically conducting material without sintering the porous ceramic material first.
3 more elements
A cathode comprising:
- a porous ceramic material defined by a plurality of pores having an inner pore wall;
- and
- at least an electronically conducting material dispersed at least partially within the pores of the porous ceramic material,
- whereby the inner pore wall of at least a portion of the plurality of pores is coated with the electronically conducting material,
- wherein the cathode is prepared by sintering the porous ceramic material first, and contacting the sintered porous ceramic material with a solution containing an oxide of the electronically conducting material
- and wherein the cathode has a higher electrical conductivity at a lower concentration of electronically conducting material, when compared to a cathode prepared by sintering both the porous ceramic material and electronically conducting material without sintering the porous ceramic material first.
3 more elements
An electrode comprising:
- a porous ceramic material;
- and
- Sr-doped LaCrO3 dispersed at least partially within the pores of the porous ceramic material,
- wherein the porous ceramic material includes a plurality of pores having an average pore size of at least about 0.5 μm,
- wherein the electrode is prepared by sintering the porous ceramic material first, and contacting the sintered porous ceramic material with a solution containing an oxide of Sr-doped LaCrO3,
- and wherein the electrode has a higher electrical conductivity at a lower concentration of Sr-doped LaCrO3, when compared to an electrode prepared by sintering both the porous ceramic material and Sr-doped LaCrO3 without sintering the porous ceramic material first.
3 more elements
An electrode comprising:
- a porous ceramic material;
- and
- Sr-doped LaCrO3 dispersed at least partially within the pores of the porous ceramic material,
- wherein the cathode has a porosity within the range of from about 10% to about 75%,
- wherein the electrode is prepared by sintering the porous ceramic material first, and contacting the sintered porous ceramic material with a solution containing an oxide of Sr-doped LaCrO3,
- and wherein the electrode has a hither electrical conductivity at a lower concentration of Sr-doped LaCrO3, when compared to an electrode prepared by sintering both the porous ceramic material and Sr-doped LaCrO3 without sintering the porous ceramic material first.
3 more elements
An electrode comprising:
- a porous ceramic material defined by a plurality of pores having an inner pore wall;
- and
- Sr-doped LaCrO3 dispersed at least partially within the pores of the porous ceramic material,
- whereby the inner pore wall of at least a portion of the plurality of pores is coated with the electronically conducting material,
- wherein the electrode is prepared by sintering the porous ceramic material first, and contacting the sintered porous ceramic material with a solution containing an oxide of Sr-doped LaCrO3,
- and wherein the electrode has a higher electrical conductivity at a lower concentration of Sr-doped LaCrO3, when compared to an electrode prepared by sintering both the porous ceramic material and Sr-doped LaCrO3 without sintering the porous ceramic material first.
3 more elements
A solid oxide fuel cell comprising:
- a cathode;
- an anode comprising:
- a porous ceramic material;
- and
- Sr-doped LaCrO3 dispersed at least partially within the pores of the porous ceramic material,
- wherein the porous ceramic material includes a plurality of pores having an average pore size of at least about 0.5 μm;
- and
- an electrolyte disposed at least partially between the cathode and the anode,
- wherein the anode is prepared by sintering the porous ceramic material first, and contacting the sintered porous ceramic material with a solution containing an oxide of Sr-doped LaCrO3,
- and wherein the anode has a higher electrical conductivity at a lower concentration of Sr-doped LaCrO3, when compared to an anode prepared by sintering both the porous ceramic material and Sr-doped LaCrO3 without sintering the porous ceramic material first.
7 more elements
Dependencies are inferred from the claim text.