Insulation for SOFC Systems
OwnerMichael Edward Badding, Thomas Dale Ketcham +2inventors
InventorsMichael Edward Badding, Thomas Dale Ketcham, Sasha Marjanovic, Dell Joseph St. Julien
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Abstract
The invention is directed to insulating compositions for use in solid oxide fuel cells. Such compositions can be used to prevent seal damage and increase the electrical and ion efficiency.
Claims30
A solid oxide fuel cell comprising a cathode, an anode, an electrolyte, a bus bar, a via pad, a seal, and an insulating amount of an insulating composition, wherein the insulating composition is proximate to the bus bar and/or the via pad and/or is present in part of the electrolyte, wherein the insulating composition is not substantially disposed between the cathode and the electrolyte.
A solid oxide fuel cell comprising a cathode, an anode, an electrolyte, a bus bar, a via pad, a seal, and an insulating amount of an insulating composition, wherein the insulating composition is proximate to the bus bar and/or the via pad and/or is present in part of the electrolyte, wherein the insulating composition is not lanthanum zirconate or strontium zirconate.
A solid oxide fuel cell comprising a cathode, an anode, an electrolyte, a bus bar, a via pad, a seal, and an insulating amount of an insulating composition comprising one or more insulating oxide ceramics having the following crystal structure class, super class, derivative structure or superstructure of the following crystal structure type:
- i) pyrochlore or distorted pyrochlore,
- ii) perovskite, distorted perovskite, superstructure of perovskite, or interleaved perovskite-like structure,
- iii) fluorite, distorted fluorite, fluorite like, anion defective fluorite, sheelite, fergusonite, or fluorite related ABO4 compound,
- iv) spinel, spinel derived structure, or inverse spinel,
- v) rock salt structure,
- vi) ilmenite,
- vii) pseudobrookite A2BO5,
- viii) stoichiometric structure based on ReO3-like blocks,
- ix) bronze or tetragonal bronze structure based on ReO3-like blocks,
- x) rutile;
- xi) trirutile crystal structure or columbite crystal structure of AB2O6,
- xii) cubic rare earth (C-M2O3) structure, or
- xiii) corundum, or
- a mixture thereof or a solid solution thereof.
- wherein the insulating composition is proximate to the bus bar and/or the via pad and/or is present in part of the electrolyte.
A solid oxide fuel cell comprising a cathode, an anode, an electrolyte, a bus bar, a via pad, a frame, a seal, and an insulating amount of an insulating composition comprising one or more insulating oxide ceramics having the following crystal structure class, super class, derivative structure or superstructure of the following crystal structure types:
- i) pyrochlore or distorted pyrochlore,
- ii) perovskite, distorted perovskite, superstructure of perovskite, or interleaved perovskite-like structure,
- iii) fluorite, distorted fluorite, fluorite like, anion defective fluorite, sheelite, fergusonite, or a fluorite related ABO4 compound,
- iv) ilmenite,
- v) pseudobrookite A2BO5,
- vi) stoichiometric structure based on ReO3-like blocks,
- vii) bronze or tetragonal bronze structure based on ReO3-like blocks,
- viii) rutile,
- ix) trirutile crystal structure or columbite crystal structure of AB2O6, or
- x) cubic rare earth (C-M2O3) structure, or
- a mixture thereof or a solid solution thereof,
- wherein the insulating composition is proximate to the frame of the solid oxide fuel cell.
Dependencies are inferred from the claim text.