Abstract: Disclosed is a method of manufacturing a cathode for a solid oxide fuel cell (SOFC) including preparing an electrode composition containing urea, ultrasonically spraying the electrode composition onto a GDC scaffold, and drying the scaffold. By using urea, calcination (?700° C.) after each infiltration cycle can be omitted, the next infiltration cycle is performed immediately after the drying (?100° C.), and thus the cathode manufacturing process time can be greatly reduced. Disclosed is also a solid oxide fuel cell including an anode support, an anode functional layer disposed on the anode support, an electrolyte disposed on the anode functional layer, and a cathode disposed on the electrolyte, wherein the cathode is formed by ultrasonic spraying using an electrode composition containing urea.

Abstract: Disclosed is a method for manufacturing a large-area thin-film solid oxide fuel cell, the method including: preparing an anode support slurry, an anode functional layer slurry, an electrolyte slurry, and a buffer layer slurry for tape casting; preparing an anode support green film, an anode functional layer green film, an electrolyte green film, and a buffer layer green film by tape casting the slurries onto carrier films; staking the green films, followed by hot press and warm iso-static press (WIP), to prepare a laminated body; and co-sintering the laminated body.

Abstract: Disclosed is a method for manufacturing a large-area thin-film solid oxide fuel cell, the method including: preparing an anode support slurry, an anode functional layer slurry, an electrolyte slurry, and a buffer layer slurry for tape casting; preparing an anode support green film, an anode functional layer green film, an electrolyte green film, and a buffer layer green film by tape casting the slurries onto carrier films; staking the green films, followed by hot press and warm iso-static press (WIP), to prepare a laminated body; and co-sintering the laminated body.

Abstract: Provided is an interconnect for a solid oxide fuel cell including ferritic stainless steel dispersed with nano-CeO2 and Nb2O5. The interconnect for the solid oxide fuel cell of the present disclosure includes nano-CeO2 and Nb2O5 having specific particle sizes in specific contents, thereby suppressing the formation of the insulating layer SiO2 and exhibiting an excellent improvement effect of high-temperature characteristics such as oxidation resistance and sheet resistance.

Abstract: The present invention relates to a coelectrolysis module which can produce synthesis gas from water and carbon dioxide and, more particularly, to a pressure coelectrolysis module having a tube-type cell mounted thereon. The pressure coelectrolysis module according to the present invention comprises a coelectrolysis cell which uses fuel gas consisting of hydrogen, nitrogen, and carbon dioxide; a pressure chamber for pressurizing the coelectrolysis cell; a vaporizer for providing steam to the coelectrolysis cell; and a mass flow controller for providing fuel gas to the coelectrolysis cell, wherein the pressure coelectrolysis module has excellent performance and durability and can improve the production yield of synthesis gas.

Abstract: The present invention relates to a method for manufacturing a tubular co-electrolysis cell which is capable of producing synthesis gas from water and carbon dioxide, and a tubular co-electrolysis cell prepared by the preparing method. The present invention comprises a tubular co-electrolysis cell which comprises: a cylindrical support comprising NIO and YSZ: a cathode layer formed on a surface of the cylindrical support, the cathode layer comprising (Sr1-xLax)Ti1-yMy)O3(M=V, Nb, Co, Mn); a solid electrolyte layer formed on the surface of the cathode layer; and an anode layer formed on a surface of the solid electrolyte layer. The tubular co-electrolysis cell manufactured by the method for manufacturing the tubular co-electrolysis cell of the present in has an excellent synthesis gas conversion rate and is capable of producing synthesis gas even at a low over voltage.

Abstract: According to an embodiment of the present disclosure, a solid electrolyte for a lithium battery comprises an oxide represented in the following chemical formula and a sintering aid including B2O3 or Bi2O3, wherein the chemical formula is L1+XAXB2?X(PO4)3, wherein A is one or more substances selected from the group consisting of aluminum (Al), chrome (Cr), gallium (Ga), iron (Fe), scandium (Sc), indium (In), ruthenium (Ru), yttrium (Y), and lanthanum (La), B is one or more substances selected from the group consisting of titanium (Ti), germanium (Ge), and zirconium (Zr), and X has a value from 0.1 to 0.5.

Abstract: According to an embodiment of the present disclosure, a method for preparing a metal bipolar plate for a fuel cell includes drying, crushing, and mixing a Fe—Cr ferrite-based steel powder with a powder of an added element selected from the group consisting of LSM((La0.80Sr0.20)0.95MnO3-x), La2O3, CeO2, and LaCrO3 to prepare a powder mixture, mixing and ball-milling the powder mixture with a solvent and binder into slurry, drying and press-forming the slurry into a pellet, cold isostatic pressing the pellet, and sintering the pellet.

Abstract: This invention relates to a cathode for a lithium-air battery, a method of manufacturing the same and a lithium-air battery including the same. The method of manufacturing the cathode for a lithium-air battery includes 1) stirring a cobalt salt, triethanolamine and distilled water, thus preparing a cobalt solution, 2) electroplating the cobalt solution on a porous support, thus preparing a cobalt plated porous support, 3) reacting the cobalt plated porous support with a mixture solution including oxalic acid, water and ethanol, thus forming cobalt oxalate on the porous support, and 4) thermally treating the cobalt oxalate.

Abstract: This invention relates to a cathode for a lithium-air battery, a method of manufacturing the same and a lithium-air battery including the same. The method of manufacturing the cathode for a lithium-air battery includes 1) stirring a cobalt salt, triethanolamine and distilled water, thus preparing a cobalt solution, 2) electroplating the cobalt solution on a porous support, thus preparing a cobalt plated porous support, 3) reacting the cobalt plated porous support with a mixture solution including oxalic acid, water and ethanol, thus forming cobalt oxalate on the porous support, and 4) thermally treating the cobalt oxalate.

Abstract: Disclosed is an anode supported flat-tube solid oxide fuel cell including: a stack including a plurality of unit cells layered therein, each of the unit cells having an anode support, wherein within the anode support, a flow path allowing a fuel gas to flow is formed, and on a surface of the anode support, an electrolyte, a cathode, and an interconnect layer are provided, wherein the interconnect layer positioned between the unit cells constituting the stack is formed by a paste obtained by mixing an electrical conductive material with glass, and on the interconnect layer formed by the paste, a metallic mesh for drawing out a current collection wire is disposed.

Abstract: Disclosed is a method for coating a metallic interconnect for a solid oxide fuel cell (SOFC), the method including the steps of: carrying out pre-treatment for removing impurities adhered on a surface of the metallic interconnect; and carrying out pulse plating with cobalt as an anode, and the metallic interconnect as a cathode, in which an average current density (Ia) is set in a room-temperature cobalt plating solution, and a maximum current density (Ip), a current-on time (Ton) and a current-off time (Toff) are adjusted based on Ia=Ip×Ton/(Ton+Toff). Through the disclosed method, it is possible to obtain a metallic interconnect having a coating surface which has a high electrical conductivity and a high chrome volatilization inhibiting property and can minimize the occurrence of micro-cracks and micro-pores, thereby improving the performance of the SOFC.

Abstract: Disclosed is a method for heating a metallic interconnect for a solid oxide fuel cell (SOFC) to 150˜300° C., which can minimize the thermal shock by reducing a temperature difference between the metallic interconnect and a coating material during a thermal plasma coating process on the metallic interconnect for the SOFC. Accordingly, through the disclosed method, a densified coating layer with minimized micro pores/cracks can be formed on the surface of the metallic interconnect. Thus, it is possible to reduce the loss in output performance during the operation of the SOFC at a high temperature, and to maintain the long-term durability and performance of the metallic interconnect.

Abstract: A sealing element and a sealing method for sealing both ends of an anode-supported tubular solid oxide fuel cell. The sealing element utilizes a coupling tube having one end opened to an exterior and a second end with a perforation hole, in which the coupling tube is formed with an internal cavity having a shape corresponding to an external appearance of an end portion of a fuel cell. A flow tube having a hollow section axially extends outwards from the second end of the coupling tube while communicating with the perforation hole. The sealing method involves cleaning the sealing element and fuel cell, surrounding an outer peripheral surface of an electrolyte layer on the ends of the fuel cell with a metallic filler material, inserting the fuel cell in a connection tube of the sealing element, heating and melting the filler material, and solidifying the melted filler material.

Abstract: An anode-supported flat-tubular solid oxide fuel cell stack includes a plurality of fuel cells and a plurality of connector plates. Each of the fuel cells includes a supported tube having semi-cylinder parts and plate parts, a connector coated on an upper plate of the supported tube as a way to be positioned at the center of the upper plate, an electrolyte layer partly coated on an external surface of the supported tube except for a portion of the supported tube coming into contact with the connector, and an air electrode coated on an external surface of the electrolyte layer. Each of the connector plates includes a lower connector plate, middle connector plates, and an upper connector plate. A plurality of gas channels are formed on the middle and lower connector plates. The anode-supported flat-tubular solid oxide fuel cell stack has a large capacity, improved power density, and reduced production costs.

Abstract: Disclosed are a sealing element and a sealing method for sealing both ends of an anode-supported tubular solid oxide fuel cell. The sealing element includes a coupling tube having a first end portion opened to an exterior and a second end portion having a perforation hole, in which the coupling tube is formed with an internal cavity having a shape corresponding to an external appearance of an end portion of the fuel cell; and a flow tube extending outward from the center of the second end portion of the coupling tube and being formed with a hollow section, which axially extends while communicating with the perforation hole of the coupling tube.

Abstract: Disclosed is an anode-supported flat-tubular solid oxide fuel cell stack, which includes an anode-supported tube having semi-cylinder parts and plate parts, thereby securing a combined structure of a tube-type and a plate-type anode-supported body, and a method of fabricating the same. The anode-supported flat-tubular solid oxide fuel cell stack includes a plurality of fuel cells and a plurality of connector plates. Each of the fuel cells includes a supported tube having the semi-cylinder parts and plate parts, a connector coated on an upper plate of the supported tube as a way to be positioned at the center of the upper plate, an electrolyte layer partly coated on an external surface of the supported tube except for a portion of the supported tube coming into contact with the connector, and an air electrode coated on an external surface of the electrolyte layer. Additionally, each of the connector plates includes a lower connector plate, one or more middle connector plates, and an upper connector plate.

Abstract: Disclosed is an anode-supported tubular solid oxide fuel cell stack, in which a thin and dense electrolyte layer and an air electrode are coated in good order on the surface of a porous anode-supported tube extruded by use of a slurry dipping process useful in mass production of a fuel cell, thereby the stable fuel cell stack with high mechanical strength is formed, and method of fabricating the anode-supported tubular solid oxide fuel cell stack. After a plurality of unit cells for anode-supported tubular solid oxide fuel cell stacks with excellent electric conductivity and a smooth current flow are inexpensively produced, the unit cells are stacked and combined with a plurality of metal connector plates having semicircular grooves for mounting unit cells thereon to fabricate a desired fuel cell stack.

Abstract: A method of making and fuel electrode-supported solid oxide fuel cell (SOFC). For manufacturing the SOFC, YSZ powder containing 30 to 50 vol % of Ni is mixed with carbon powder to give a fuel electrolyte slurry which is pre-sintered, coated on a fuel electrode tube, and then the coated tube is sintered. An air electrode slurry made of (La, Sr)MnO3 powder is coated on the electrolyte-coated tube and sintered. The fuel electrode of the metal (Ni/ceramic (YSZ) cermet of the SOFC is a support and the electrolyte layer underlaying the air electrode is coated as a thin film. At about 1,000° C., the Ni components of the fuel electrode are connected to each other like a mesh, improving the fuel electrode strength while the porous fuel electrode allows the sufficient permeation of fuel gas, thereby providing a large economical profit in the production cost without degradation of fuel cell performance.

Abstract: Disclosed are a metallic interconnection material for solid oxide fuel cells and a preparation method thereof. The metallic interconnection material has two fine microstructural phases in which 5-25% by volume of LaCrO.sub.3 is dispersed at the grain boundaries of Cr particles. It can be prepared by mixing 75-95% by volume of a Cr powder and 5-25% by volume of an LaCrO.sub.3 powder, together with a solvent and a binder, in a mill, molding the mixture into a predetermined shape after drying, and sintering the molded shape at approximately 1,500.degree. C. for 10 hours in an Ar atmosphere with 5 vol % of hydrogen to give an LaCrO.sub.3 -dispersed Cr alloy. The LaCrO.sub.3 -dispersed Cr alloy shows high electric conductivity by virtue of the growth inhibition of Cr particles during sintering and high chemical stability by virtue of the presence of the rare earth metal, La, meeting meet the requirements for the interconnection materials for solid oxide fuel cells.