Abstract: A solid oxide fuel cell capable of directly utilizing hydrocarbons as a fuel source at operating temperatures between 200° C. and 500° C. The anode, electrolyte, and cathode of the solid oxide fuel cell can include technologies for improved operation at temperatures between 200° C. and 500° C. The anode can include technologies for improved direct utilization of hydrocarbon fuel sources.

Abstract: Disclosed are an oxide-coated metal catalyst for a composite electrode and a method for preparing a composite electrode using the same. The metal catalyst includes oxide particles applied thereto, wherein the oxide particles are applied so as not to overlap one another or are applied as an independent separate layer, and the oxide particles are nanograins having a diameter of 1-500 nm. The oxide applied to the metal catalyst prevents the agglomeration of particles of the metal catalyst even under high-temperature conditions. Accordingly, the present invention overcomes the problem in which particles of a metal catalyst that is used in the anode or cathode of various fuel cells or in various electrode materials agglomerate when the metal catalyst particles reach high-temperature conditions during the fabrication or operation of the fuel cells, thereby reducing the efficiency of the electrode.

Abstract: Provided is a flexible fuel cell.

Abstract: Disclosed herein is a flexible fuel cell, including: (i) an anode comprising an anode end plate structure made of a polymer material and provided with a hydrogen flow channel and a collector made of a metal layer deposited on the anode end plate structure; (ii) a cathode comprising a cathode end plate structure made of a polymer material and provided with an air flow channel having air holes and a collector formed of a metal layer deposited on the cathode end plate structure; and (iii) a membrane electrode assembly (MEA) comprising a polymer electrolyte membrane whose surface is coated with a catalyst layer and a gas diffusion layer (GDL) provided on at least one side thereof, wherein the membrane electrode assembly is interposed and pressed between the anode and the cathode.

Abstract: Provided is a fuel cell system using waste hydrogen generated from a sea water electrolyzing apparatus, the fuel cell system including: a sea water electrolyzing apparatus carrying out electrolysis of sea water used as cooling water in a nuclear power generation system to produce a chlorine-containing material; a hydrogen conveying line linked to one side of the sea water electrolyzing apparatus to convey waste hydrogen generated during the electrolysis; and a fuel cell linked to the hydrogen conveying line to generate electricity by using the waste hydrogen supplied from the hydrogen conveying line as fuel. The fuel cell system generates electricity by using waste hydrogen, which, otherwise, is totally discarded after being generated secondarily from the sea water electrolyzing apparatus, as fuel for the fuel cell.

Abstract: Disclosed herein is a flexible fuel cell, including: (i) an anode comprising an anode end plate structure made of a polymer material and provided with a hydrogen flow channel and a collector made of a metal layer deposited on the anode end plate structure; (ii) a cathode comprising a cathode end plate structure made of a polymer material and provided with an air flow channel having air holes and a collector formed of a metal layer deposited on the cathode end plate structure; and (iii) a membrane electrode assembly (MEA) comprising a polymer electrolyte membrane whose surface is coated with a catalyst layer and a gas diffusion layer (GDL) provided on at least one side thereof, wherein the membrane electrode assembly is interposed and pressed between the anode and the cathode.

Abstract: Provided is an electrolyte membrane for solid oxide fuel cells. The electrolyte membrane for solid oxide fuel cells includes two or more deposited layers, wherein each of the deposited layers independently has an average crystal grain size of 5-100 nm and the deposited layers are different from each other in the average crystal grain.

Abstract: Provided is a fuel cell system using waste hydrogen generated from a sea water electrolyzing apparatus, the fuel cell system including: a sea water electrolyzing apparatus carrying out electrolysis of sea water used as cooling water in a nuclear power generation system to produce a chlorine-containing material; a hydrogen conveying line linked to one side of the sea water electrolyzing apparatus to convey waste hydrogen generated during the electrolysis; and a fuel cell linked to the hydrogen conveying line to generate electricity by using the waste hydrogen supplied from the hydrogen conveying line as fuel. The fuel cell system generates electricity by using waste hydrogen, which, otherwise, is totally discarded after being generated secondarily from the sea water electrolyzing apparatus, as fuel for the fuel cell.

Abstract: A solid oxide electrolyte membrane including a solid oxide electrolyte layer; and an insulating layer formed as a conformal layer on a single surface or two opposite surfaces of the solid oxide electrolyte layer and including nano-grains having a average crystal grain size of 30 nm or less, a method of manufacturing the solid oxide electrolyte membrane, and a fuel cell including the solid oxide electrolyte membrane.