Porous electrode, solid oxide fuel cell, and method of producing the same

A cathode comprising:

• a porous ceramic matrix;
• and
• at least an electronically conducting material dispersed at least partially within the pores of the porous ceramic matrix,
• wherein the cathode has a porosity within the range of from about 10% to about 75%.

A cathode comprising:

• a porous ceramic matrix 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 matrix,
• whereby the inner pore wall of at least a portion of the plurality of pores is coated with the electronically conducting material.

An electrode comprising:

• a porous ceramic matrix;
• and
• Sr-doped LaCrO3 dispersed at least partially within the pores of the porous ceramic matrix,
• wherein the porous ceramic matrix includes a plurality of pores having an average pore size of at least about 0.5 μm.

An electrode comprising:

• a porous ceramic matrix;
• and
• Sr-doped LaCrO3 dispersed at least partially within the pores of the porous ceramic matrix,
• wherein the cathode has a porosity within the range of from about 10% to about 75%.

An electrode comprising:

• a porous ceramic matrix 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 matrix,
• whereby the inner pore wall of at least a portion of the plurality of pores is coated with the electronically conducting material.

A method of making a cathode comprising:

• forming a porous ceramic matrix;
• adding at least an electronically conducting material to the porous ceramic matrix;
• and
• heating the porous ceramic matrix and electronically conducting material to a temperature low enough to prevent a solid state reaction from taking place between the ceramic matrix and the electronically conducting material.

A method of making a cathode comprising:

• forming a porous ceramic matrix;
• impregnating the porous ceramic matrix with precursors to Sr-doped LaCrO3;
• and
• heating the porous ceramic matrix and precursors to Sr-doped LaCrO3 to a temperature low enough to prevent a solid state reaction from taking place between the ceramic matrix and LaCrO3.

A solid oxide fuel cell comprising:

• a cathode;
• an anode comprising:
• a porous ceramic matrix;
• and
• Sr-doped LaCrO3 dispersed at least partially within the pores of the porous ceramic matrix,
• wherein the porous ceramic matrix 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.

A method of making a solid oxide fuel cell comprising:

• forming at least a two-layer green tape comprising an electrolyte material;
• sintering the green tape at a temperature within the range of from about 1,350 to about 1,650° C. to form a porous matrix of electrolyte material having at least a dense layer and one porous layer;
• forming an anode on the dense layer or optionally on the at least one porous layer of the electrolyte material by applying the precursor to an anode composition to the layer and calcining;
• forming a cathode by impregnating the at least one porous layer of the porous matrix of electrolyte material with a precursor of an electronically conducting material and calcining.