Manufacturing method for solid-electrolyte fuel cell
AssigneeYuasa Corporation
InventorsRyoichi Okuyama, Eiichi Nomura
Life of this patent
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Abstract
This invention relates to a manufacturing method for a solid-electrolyte fuel cell having a three-layer structure and equipped with a fuel-electrode and an air-electrode for its electrodes with a solid-electrolyte sandwiched between them. A mold (4) comprising a material having a property to suck a specified solvent is used. A slurry is made up by mixing a solid-electrolyte powder and an electrode powder to the same solvent as the above specified solvent, and the slurry is poured in turn in the mold to form an electrolyte green body (5) and electrode green bodies (6) and (7). Thereby, a solid-electrolyte fuel cell including no crack and peeling-off in each layer can be obtained easily and inexpensively.
Claims27
A method for manufacturing a solid-electrolyte fuel cell equipped with a fuel-electrode and an air-electrode for its electrodes with a solid-electrolyte sandwiched between said electrodes;
- said method comprising the steps of pouring a first slurry into a concave portion of a mold composed of a material having a property for sucking a specified liquid and forming an electrolyte green body, said first slurry being a mixture of a solid-electrolyte powder and said specified liquid,
- pouring a second slurry into said concave portion and forming an electrode green body on said electrolyte green body and forming a multi-layer green body integrated with said electrolyte green body, said second slurry being a mixture of an electrode powder and said specified liquid,
- and removing said multi-layer green body from said mold and sintering said removed multi-layer green body;
- said electrode green body formed in said concave portion being one or both of a fuel-electrode green body and an air-electrode green body.
A method for manufacturing a solid-electrolyte fuel cell equipped with a fuel-electrode and an air-electrode for its electrodes with a solid-electrolyte sandwiched between said electrodes;
- said method comprising the steps of pouring a first slurry into a concave portion of a mold composed of a material having a property for sucking a specified liquid and forming an electrolyte green body, said first slurry being a mixture of a solid-electrolyte powder and said specified liquid,
- pouring a second slurry onto said electrolyte green body in said concave portion of said mold and forming a selected one of a fuel-electrode green body and an air-electrode green body and forming a double-layer green body integrated with said electrolyte green body, said second slurry being a mixture of said selected one of said fuel-electrode powder and said air-electrode powder with said specified liquid,
- and removing said double-layer green body from said mold and sintering said removed double-layer green body and forming an electrolyte-electrode composite,
- and forming a coating of the other of said selected said fuel-electrode and said air-electrode on the electrolyte side of said electrolyte-electrode composite.
A method for manufacturing a solid-electrolyte fuel cell equipped with a fuel-electrode and an air-electrode for its electrodes with a solid-electrolyte sandwiched between said electrodes;
- said method comprising the steps of pouring a first slurry into a concave portion of a mold composed of a material having a property for sucking a specified liquid for forming a selected one of a fuel-electrode green body and an air-electrode green body, said first slurry being a mixture of a selected one of a fuel-electrode powder and an air-electrode powder and said specified liquid,
- pouring a second slurry onto said green body made up in said pouring of said first slurry and forming an electrolyte green body integrated with said green body made up in said first slurry pouring and forming a double-layer green body, said second slurry being made up of a mixture of a solid-electrolyte powder and said specified liquid,
- removing said double-layer green body from said mold and sintered said removed double-layer green body and forming an electrolyte-electrode composite,
- and forming a coating of the other of said selected said fuel-electrode and said air-electrode on the electrolyte side of said electrolyte-electrode composite.
A method for manufacturing a solid-electrolyte fuel cell equipped with a fuel-electrode and an air-electrode for its electrodes with a solid-electrolyte sandwiched between said electrodes;
- said method comprising the steps of pouring a first slurry into a concave portion of a mold composed of a material having a property for sucking a specified liquid and forming a first green body, said first slurry being a mixture of a powder selected from one of a fuel-electrode powder and an air-electrode powder with said specified liquid,
- pouring a second slurry onto said first green body formed in said concave portion of said mold and forming a second green body on said first green body in said mold, said second slurry being a mixture of a solid-electrolyte powder and said specified liquid,
- pouring a third slurry onto said second green body formed in said concave portion of said mold and forming a third green body on said first and second green bodies in said mold, said third slurry being a mixture of a powder selected from the other of said fuel-electrode powder and said air-electrode powder with said specified liquid,
- and removing said three-layer green body from said mold and sintering said three-layer green body and forming an electrolyte-electrode composite.
Dependencies are inferred from the claim text.