Abstract:
PURPOSE: A self humidifying method of a fuel cell device is provided to easily humidify a room without a humidifier; reduce the size of the fuel cell system without a separate cell for humidification; increase a fuel power density. CONSTITUTION: A self humidifying method of a fuel cell device in which more than one alkali anion exchange membrane fuel cell or a stack and more than one polymer electrolyte membrane fuel cell or the stack are arranged by turns comprises the following: a step of supplying hydrogen gas to the alkali anion exchange membrane fuel cell or the stack; a step of supplying the hydrogen gas which is emitted from the alkali anion exchange membrane fuel cell or the stack, and which is humidified with the water which is generated in the alkali anion exchange membrane fuel cell or the stack to the polymer electrolyte membrane fuel cell or the stack.
Abstract:
PURPOSE: A hydrogen pump system is provided to separate or purify hydrogen by an independent operation without external power source. CONSTITUTION: A hydrogen pump system includes m hydrogen pumps and n fuel cells. A first hydrogen pump includes a first electrode-membrane assembly; a first hydrogen supply unit located in one side of the first hydrogen pump electrode-membrane assembly; a first residual gas exhaust unit; and a hydrogen exhaust unit located in the opposite side of the electrode-membrane assembly. Other hydrogen pumps are similar to the first hydrogen pump. [Reference numerals] (AA) Mixed gas; (BB) Concentration; (CC) Hydrogen pump; (DD) Air
Abstract:
본 명세서에는 안정하면서도 성능이 우수한 고분자 전해질의 재료인 신규한 폴리벤즈이미다졸리움이 제공되며, 상기 폴리벤즈이미다졸리움을 이용하면 불안정한 음이온 교환기의 단점을 보완함으로써, 높은 안정성과 고성능을 갖는 고분자 전해질 막 또는 촉매 바인더를 제공할 수 있는 효과가 있다.
Abstract:
PURPOSE: A method for stabilizing structure of a membrane electrode assembly is provided to improve interface stability between an electrolyte membrane and a catalyst layer, by modifying edge parts of a polymer electrolyte membrane, which are not coated with a catalyst. CONSTITUTION: In a method for stabilizing structure of a membrane electrode assembly, the fuel cell membrane electrode assembly comprises a polymer electrolyte membrane, and a catalyst layer coated on the polymer electrolyte membrane. The method comprises a step of heat-treatment of the part of the polymer electrolyte membrane which includes one or more of an edge region of a polymer electrolyte membrane, a gas inlet region, and an outlet region(20). By the heat-treatment, the interface of the electrolyte membrane and catalyst layer is stabilized.
Abstract:
본 발명은 촉매; 변성 알콕시레이트 화합물을 유효성분으로 포함하는 분산제; 전도성 이오노머; 및 용매를 포함하는 연료전지용 막-전극 접합체(MEA)의 제조를 위한 촉매 슬러리 조성물, 이를 사용한 연료전지용 막-전극 접합체의 제조방법 및 이로부터 제조된 연료전지용 막-전극 접합체에 관한 것이다. 촉매 슬러리 조성물에 포함된 촉매 및 전도성 이오노머 입자의 분산성을 향상시킬 수 있고, 이러한 촉매 슬러리 조성물을 도포하는 코팅공정과 용매를 제거하는 건조공정을 거친 후에 경우 균일성이 매우 우수하고 촉매와 이오노머 입자 사이가 연속적으로 이어지지 않아, 데드 스페이스(dead space)라 불리는 큰 크랙이 없는 구조 배열을 가진 촉매층을 형성할 수 있고, 궁극적으로 기공구조를 적용한 막-전극 접합체의 경우 향상된 성능을 나타낼 수 있다.
Abstract:
PURPOSE: A fuel cell electrolyte membrane is provided to have excellent cell performance and long term dimensional stability, and to obtain interfacial stability because a membrane/electrode interface separation phenomenon is not occurred after long term operation. CONSTITUTION: A fuel cell electrolyte membrane comprises a blend of sulfonated polymers which are the same, or two or more kinds of polymers having different sulfonation degrees. The sulfonate polymers are independently and respectively selected from sulfonated poly(ether sulfone), poly(thiosulfone), poly(ether ether ketone), polyimide, polystyrene, and polyphosphazene based sulfonated hydrocarbon based polymers. A membrane-electrode assembly comprises the fuel cell electrolyte membrane.
Abstract:
본 발명은 (a) 촉매, 이온 전도성 고분자 및 용매로 촉매 잉크 슬러리를 제조하는 단계; (b) 상기 촉매 잉크 슬러리를 지지막에 도포하고, 진공 건조시키는 단계; 및 (c) 상기 지지막을 전해질막의 일면 또는 양면에 전사하여 전해질막에 촉매층을 형성하는 단계를 포함하는 연료전지용 막-전극 접합체의 제조방법, 이로부터 제조된 막-전극 접합체 및 이를 포함한 연료전지에 관한 것이다. 본 발명의 제조방법에 따르면, 기공율이 상승된 막-전극 접합체를 제조할 수 있으며, 이를 통해 전해질막과 전극 사이의 물질 전달 저항(mass transfer resistance)이 유의하게 감소될 수 있는 바, 궁극적으로 본 발명의 제조방법에 따라 제조된 막-전극 접합체를 포함한 연료전지의 출력 밀도 및 성능을 효율적으로 향상시킬 수 있다. 촉매층, 전해질막, 전사, 진공 건조, 지지막
Abstract:
PURPOSE: A carbon supported platinum-iridium alloy catalyst and a method for synthesizing the same, an electrode fuel cell including the catalyst are provided to synthesize platinum-iridium alloy particles in a carbon support at a room temperature by supplying a stabilizer and a reducing agent in a colloidal solution containing a platinum precursor, an iridium precursor, and the carbon support. CONSTITUTION: A carbon supported platinum-iridium alloy catalyst is obtained by supplying a reducing agent in a colloidal solution containing a platinum precursor, an iridium precursor, and a carbon support. The colloidal solution contains a stabilizer. The synthesis of the carbon supported platinum-iridium alloy catalyst is implemented at a room temperature. The solvent of the colloidal solution is ethanol, methanol, or tetrahydrofuran. The stabilizer is an ammonium bromide-based compound represented by chemical formula 1. The pH value of the colloidal solution is between 1 and 11. The stabilizer is eliminated after the carbon supported platinum-iridium catalyst is obtained.
Abstract:
PURPOSE: An apparatus and a method for sensing fuel concentration, a system apparatus and a method for the fuel recirculation of a fuel cell using the same, and a fuel cell using apparatus using the same are provided to use various materials having low conductivity as the material of an electrolyte film. CONSTITUTION: An apparatus(100) for sensing fuel concentration comprises a unit cell, a stack, and an open circuit voltage meter. The unit cell comprises electrolyte films(10), a reference electrode(13), and a measurement electrode(15). The reference electrode is formed in one side of the electrolyte films, and the measurement electrode is formed in the other side. The stack stacks the electrolyte films. The open circuit voltage meter measures the open circuit voltage of the unit cell or the stack.