Abstract: Disclosed is a paste for screen printing which is used in the fabrication of an anode functional layer, an electrolyte layer, or a cathode layer of an anode-supported solid oxide fuel cell. The paste contains a raw material powder, ethyl cellulose alpha terpineol, and an alcoholic solvent in which a thermosetting binder is soluble. Also provided is a method of fabricating an anode-supported solid oxide fuel cell using the paste. Thus, a reliable high-performance, large area solid oxide fuel cell that can be economically and efficiently fabricated is provided.

Abstract: A composite sealant of the present invention increases a fracture toughness of glass which has an excellent gas tightness but has a low fracture resistance, to enhance the thermal cycle stability while maintaining the gas tightness of a stack. For this, alpha-alumina fiber particles, alpha-alumina granular particles, and metallic particles are mixed and added to a glass matrix for remarkably increasing the fracture toughness from 0.5 MPa·m05 to 6 MPa·m°'5 through the multiple effects of crack deflection and crack bridging by the fiber and granular particles, and effects of crack arresting and plastic deformation by the metallic particles.

Abstract: The present invention provides a hybrid composite sealant, as a sealing material for a planar type solid oxide fuel cell stack, having a matrix of a glass composition, wherein a surface layer reinforced with platelet reinforcement particles is laminated on either one or both surfaces of an inner layer reinforced with fibrous reinforcement particles. Accordingly, by applying the composite sealant of the present invention to the solid oxide fuel cell stack, excellent gas-tightness of the stack can be obtained even under low coupling pressure, thermal cycling durability can be enhanced due to low coupling strength with a contact surface of an object to be sealed, stack disassembly and maintenance can be facilitated when parts within the stack are disabled, and stack stability as well as stack performance can be maintained under a pressurized operation condition where pressure differentials between the inside and outside of the stack reach to 5 atmospheric pressures (0.5 MPa).

Abstract: A metal oxide thin film structure for a solid oxide fuel cell, prepared by a method comprising dispersing a metal oxide nanopowder in a metal oxide salt solution and subsequent coating of the resulting metal oxide powder dispersed sol and the metal oxide salt solution on a porous substrate, has excellent gas impermeability, excellent phase stability, and is devoid of cracks or pinholes.

Abstract: Multi-stage in-line cartridge ejectors for a fuel cell system provided herein comprise: at least one ejector main body for supplying hydrogen, each ejector main body including a plurality of nozzles arranged in line with a predetermined gap, in which the diameters of the respective nozzles become larger from an inlet side of the ejector main body toward an outlet side thereof, and a plurality of sub-inlets formed on an outer surface of the ejector main body to be connected to the gap or gaps between the nozzles; and a housing accommodating the eject main body and including a main inlet for intake of recirculated hydrogen. The multi-stage in-line cartridge ejectors can improve the system performance by increasing the amount of recirculated hydrogen. Moreover, at least one check valve is provided at an intake position of the cartridge ejectors to effectively prevent reverse flow of recirculation hydrogen gas and at least one heater is provided around the cartridge ejectors to improve cold startability.

Abstract: The present invention relates to ceramic-NiO composite powders which can be used to form ceramic-NiO composite body anodes. These anodes possess an interpenetrating network structure and can be used in solid oxide fuel cell (SOFC) by The present invention also describes methods of preparing these powder, anodes and fuel cells.

Abstract: A micro cell fuel cell using a nano porous structure according to a thin film process and an anodizing process as a template for implementing a porous structure of an electrode, its fabrication method, and a micro fuel cell stack using the same are disclosed. The micro-fuel cell includes a solid electrolyte and first and second electrodes separately formed on the electrolyte, wherein at least one of the first and second electrodes is supported by a template having a plurality of nano pores formed by depositing, anodizing and etching a thin film, and is a porous electrode with nano pores formed at positions corresponding to the entirety or a portion of the plurality of nano pores formed on the template. The micro-fuel cell can be fabricated based on the thin film process, and unit cells can be highly integrated to implement a micro-fuel cell system generating a high voltage and a high current.

Abstract: The present invention provides electrode-electrolyte composite particles for a fuel cell, which have either electrode material particles uniformly dispersed around electrolyte material particles or electrolyte material particles uniformly dispersed around electrode material particles, to enhance the electrode performance characteristics and electrode/electrolyte bonding force, as well as thermal, mechanical and electrochemical properties of the fuel cell, in a simple method without using expensive starting materials and a high temperature process.

Abstract: Disclosed is a single chamber solid oxide fuel cell, in which an electrode is arranged on the same plane as an electrolyte and unit cells are integrated to one another. A high output density of the fuel cell is obtained, and a micro fuel cell for generating a high voltage and a high current is implemented by constructing the unit cells in series or in parallel.

Abstract: The present invention discloses a paste for screen printing which is used in a process of fabricating an anode functional layer, an electrolyte layer and a cathode layer of an anode-supported solid oxide fuel cell. The paste for the solid oxide fuel cell contains raw material powder of each layer, ethyl cellulose which is a binder, alpha terpineol which is a solvent, and an alcoholic solvent which has solubility to a thermosetting binder contained in an anode support and which is added by 0.5 to 20 wt % of alpha terpineol as an additional solvent. The present invention also discloses a fabricating method of an anode-supported solid oxide fuel cell which forms each layer of the fuel cell by screen printing by using the paste.

Abstract: A method for preparing powder granules by a liquid condensation process comprising preparing a slurry by mixing powders, a binding agent and a binding agent soluble solvent, dropping the slurry to a binding agent insoluble solvent to fix the binding agent so that the binding agent can not be released to a surface of a droplet of the slurry, coagulating the droplet by solvent exchange between the soluble solvent inside the droplet and the insoluble solvent at the surface of the droplets, and separating the coagulated droplet from the insoluble solvent, drying it and completely removing a residual solvent.

Abstract: The present invention relates to ceramic-NiO composite powders which can be used to form ceramic-NiO composite body anodes. These anodes possess an interpenetrating network structure and can be used in solid oxide fuel cell (SOFC) by The present invention also descibes methods of preparing these powder, anodes and fuel cells.

Abstract: Disclosed is an anode supporter for a solid oxide fuel cell (SOFC). The SOFC comprises an anode supporter having a high gas permeability, a high electrical conductivity, a high electrochemical activity, a high mechanical strength, and a large area; an anode functional layer for attenuating a surface defect of the anode supporter and maximizing an electrochemical activity of the anode; an electrolyte having a ultra-thin film; a cathode functional layer for removing an interface reaction between the electrolyte and the cathode and enhancing an electrochemical reaction at the cathode; a cathode having an excellent interface bonding characteristic with the cathode functional layer and a high electrical conductivity; and a current collect layer for maximizing an electrical connection between the cathode and a separator or interconnector. Accordingly, a performance of the single cell of a large area is enhanced.

Abstract: An electrode pattern for a solid oxide fuel cell (SOFC) comprises a plurality of micro-sized first electrode patterns formed on an upper surface of a substrate including an electrolyte layer, and a plurality of micro-sized second electrode patterns formed between the first electrode patterns. The electrode pattern is formed by using a mold fabricated by a photoresist process. In order to form the electrode pattern, a paste for an electrode including a thermo-setting resin and an electrode powder is prepared. The electrode having a micro-sized or sub-micro sized width and a high precision is simply fabricated, and a miniaturized SOFC having a high function is fabricated.

Abstract: In a metal oxide nanoparticle and a synthetic method thereof, and in particular to maghemite (?-Fe2O3) nanoparticles usable as a superhigh density magnetic recording substance by having good shape anisotropy and magnetic characteristics, hematite (?-Fe2O3) nanoparticles usable as a precursor to the maghemite or a catalyst, maghemite and hematite-mixed nanoparticles and a synthetic method thereof, the method for synthesizing metal oxide nanoparticles includes forming a reverse micelle solution by adding distilled water, a surfactant and a solvent to metallic salt not less than trivalent, precipitating and separating gel type amorphous metal oxide particles by adding proton scavenger to the reverse micelle solution; adjusting a molar ratio of metal oxide to the surfactant by washing the gel type amorphous metal oxide particles with a polar solvent; and crystallizing metal oxide nanoparticles through heating or reflux after dispersing the gel type amorphous metal oxide particles in a non-polar solvent having a h

Abstract: Disclosed is a method for manufacturing composite granules having a homogeneous particle distribution, comprising powders of multimodal particle size distribution and phenol resins, and a method for manufacturing green bodies having homogeneous microstructure without particle separation from the granules.

Abstract: In a metal oxide nanoparticle and a synthetic method thereof, and in particular to maghemite (&ggr;-Fe2O3) nanoparticles usable as a superhigh density magnetic recording substance by having good shape anisotropy and magnetic characteristics, hematite (&agr;-Fe2O3) nanoparticles usable as a precursor to the maghemite or a catalyst, maghemite and hematite-mixed nanoparticles and a synthetic method thereof, the method for synthesizing metal oxide nanoparticles includes forming a reverse micelle solution by adding distilled water, a surfactant and a solvent to metallic salt not less than trivalent, precipitating and separating gel type amorphous metal oxide particles by adding proton scavenger to the reverse micelle solution; adjusting a molar ratio of metal oxide to the surfactant by washing the gel type amorphous metal oxide particles with a polar solvent; and crystallizing metal oxide nanoparticles through heating or reflux after dispersing the gel type amorphous metal oxide particles in a non-polar solvent ha

Abstract: A method for preparing powder granules by a liquid condensation process comprising preparing a slurry by mixing powders, a binding agent and a binding agent soluble solvent, dropping the slurry to a binding agent insoluble solvent to fix the binding agent so that the binding agent can not be released to a surface of a droplet of the slurry, coagulating the droplet by solvent exchange between the soluble solvent inside the droplet and the insoluble solvent at the surface of the droplets, and separating the coagulated droplet from the insoluble solvent, drying it and completely removing a residual solvent.

Abstract: Disclosed is a method for manufacturing composite granules having a homogeneous particle distribution, comprising powders of multimodal particle size distribution and phenol resins, and a method for manufacturing green bodies having homogeneous microstructure without particle separation from the granules.

Abstract: A SiC whisker-reinforced ceramic composite is prepared by adding about 0.4 to 1.0% by weight of a nonionic polymer, polyvinylalcohol (PVA) to a heat-treated SiC whisker to obtain a SiC whisker slurry, mixing the SiC whisker slurry with a matrix slurry formed at about pH 4 followed by freeze-drying the resulting slurry mixture to produce granules having a uniform packing structure and hot pressing the granules.