Abstract:
본 발명은 전도성 고분자 또는 탄소에 고분자 물질을 첨가한 형태인 탄소 복합체를 주 재질로 하여 분리판을 제조함으로써, 경량화 및 박막화가 가능하고, 부식을 방지할 수 있으며, 나아가 간단한 제조공정으로 제조단가를 저감시킬 수 있는, 전도성 고분자 또는 탄소 복합체 재질의 고분자 전해질 연료 전지용 분리판 제조방법에 관한 것으로, 본 발명에 의한 고분자 전해질 연료 전지용 분리판은, 전도성 고분자 또는 탄소 복합체를 주 재질로 하여 제조되는 고분자 전해질 연료 전지용 분리판으로, 상기 전도성 고분자는 폴리아닐린, 폴리페닐렌, 폴리치에닐렌 비닐렌, 폴리피롤, 폴리페닐렌 비닐렌, 및 폴리아세틸렌로 구성되는 군으로부터 하나 이상 선택된 것이고, 상기 탄소 복합체는 탄소에 페놀수지, 비닐 에스터수지, 에폭시수지, 강화 폴리에스터수지, 및 폴리이미드 수지로 구성되는 고분자 물질군으로부터 하나 이상을 선택하여 첨가시킨 것임을 특징으로 한다.
Abstract:
PURPOSE: Provided is a functional electrolyte membrane for a fuel cell, which is controllable n terms of a membrane thickness, is manufactured by a simple process, and has improved performance. CONSTITUTION: The functional polymer electrolyte membrane(1) is manufactured by adding, to a polymer electrolyte ionomer solution, a carrier having a large specific surface area or a catalyst used for electrochemical reactions in a polymer electrolyte fuel cell, as functional additives(2,3) which permit self-moistening or protect methanol crossover. In the functional polymer electrolyte membrane, the carrier is microparticles(2) or microfibers(3) comprising platinum, palladium, silica, alumina, titania or fluorine, and the catalyst comprises at least one component selected from the group consisting of platinum and ruthenium.
Abstract:
PURPOSE: A joining method of a fuel cell stack is provided, which can perform the joining in the center as well as the outside, therefore disperses excessive force to the outside equally, prevents a channel plate and a header from being bended, and reduces a contact resistance between an electrolyte-electrode assembly and the channel plate. CONSTITUTION: The joining method of the fuel cell stack is performed by forming sections(18), on which gas channels(12) are not formed, in the center or the outside of the channel plate; forming a central joining hole(15) and a plurality of outside joining holes(14) in the sections(18) to insert joining sticks(17) therein; inserting the joining sticks(17); and then fastening by headers on the both sides of the stack. Manifolds(13) for gas or liquid are formed between the outside joining holes(14).
Abstract:
Provided are a membrane electrode assembly having an ununiform composition for a fuel cell which is improved in performance and lifetime and is lowered in manufacturing cost, and a polymer electrolyte fuel cell containing the membrane electrode assembly. The membrane electrode assembly is such that the total region of an electrode catalyst layer is divided into a plurality of regions from a gas injection hole to a gas discharge hole, and the catalyst coating amount per unit area increases gradually along the divided regions(1,2,3) from the gas injection hole part to the discharge hole part. Preferably the catalyst is platinum or a platinum-ruthenium alloy.
Abstract:
본 발명은 연료 전지용 분리판에 관한 것으로, 상세하게는 분리판의 중심을 기준으로 좌우 대칭의 기체유로가 요철모양의 패턴으로 반복 배치된 형태이고, 기체의 입구와 출구가 각각 하나의 매니폴드로 구성되어 있는 요철구조의 기체유로를 갖는 연료 전지용 분리판에 관한 것으로, 전기 전도도를 띠는 재질에 기체가 흐르는 통로인 기체유로가 형성된 연료 전지용 분리판에서, 상기 기체유로는 분리판의 종방향 및 횡방향의 각 중심선에 대하여 요철구조의 반복 패턴을 가지며, 분리판의 중심을 기준으로 하여 기체유로 수 개가 한 조를 이루어 좌우 대칭으로 둘 이상의 조를 이루어 형성되는 것을 특징으로 하는 요철구조의 기체유로를 갖는 연료 전지용 분리판을 제공한다.
Abstract:
PURPOSE: A separating panel made of a conductive polymer or a carbon complex for a polymer electrolyte fuel cell is provided to achieve a light weight and a thin thickness, prevent corrosion, and reduce production cost owing to the simplified process, compared to the conventional separating panel. CONSTITUTION: The separating panel(1) for a polymer electrolyte fuel cell is mainly comprised of a conductive polymer or a carbon complex, wherein the conductive polymer is at least one selected from a group consisting of polyaniline, polyphenylene, polythienylene vinylene, polypyrrole, polyphenylene vinylene and polyacetylene, and the carbon complex is one added with at least one selected from a group consisting of phenol resin, vinyl ester resin, epoxy resin, reinforced polyester resin and polyimide resin. The separating panel is produced by (a) preparing a mesh type gas flow channel panel(10) and a collecting panel, wherein the separating panel is a serpentine-parallel type panel having a gas channel or a mesh type gas separating panel; (b) attaching a gasket to meshes except the meshes contacting with the electrode in the mesh type gas flow channel panel; and (c) attaching the collecting panel to the mesh type gas flow channel panel from the step (b).
Abstract:
PURPOSE: A separating panel having a gas flow channel with uneven structure for a fuel cell is provided to minimize the gradient in gas concentration in the gas flow channel, and remarkably reduce the pressure drop between the inlet and outlet of the gas flow channel, thereby helping to easily drain the water in the channel, to diffuse the gas into the electrode. The separating panel also has improved efficiency without requiring additional manifolds. CONSTITUTION: The separating panel(11) made of an electroconductive material comprises a plurality of gas flow channels as one group, which are symmetrically positioned having the center of the separating panel as the axis, wherein the gas flow channel is formed to have repetitively protruded-and-receded uneven patterns(13) to each horizontal and vertical axis(15) of the separating panel, and the plurality of gas flow channels are converged, at each end of the inlet and outlet, into one channel being connected to one manifold(14).