摘要:
Disclosed is a polymer electrolyte fuel cell having an improved separator plate. The fuel cell comprises a solid polymer electrolyte membrane; an anode and a cathode sandwiching the solid polymer electrolyte membrane therebetween; an anode-side conductive separator plate having a gas flow path for supplying a fuel gas to the anode; and a cathode-side conductive separator plate having a gas flow path for supplying an oxidant gas to the cathode, wherein each of the anode-side and cathode-side conductive separator plates is composed of a metal and a conductive coat which has resistance to oxidation and covers a surface of the metal. Alternatively, the above-mentioned separator plates are formed of a metal and a coat having resistance to oxidation and have roughened surfaces with recessions and protrusions, and portions of a top surface of the protruding portions, which lack the coat, are electrically connected to an electrode.
摘要:
A method of operating a polymer electrolytic fuel cell, wherein its operating condition is regulated for an optimal one which is represented by a function of a gas flow rate and the difference between a saturated steam pressure and an actual steam pressure, by regulating an in-plane temperature distribution obtained by a cooling water flow direction and by the regulations of a cooling water inlet temperature and a cooling water flow rate, a gas supply amount, and a supplied moisture amount, and a current density, the method resolving conventional problems with a polymer electrolytic fuel cell that a performance distribution occurs in a single plane of a cell and a stable operation is difficult when a performance distribution is significant.
摘要:
A method for simply manufacturing a high-performance electrode without using any organic solvent for transforming the electrode catalyst to an ink and any surfactant for transforming the water-repellent carbonaceous material to an ink. The method for manufacturing an electrode for a polymer electrolyte fuel cell comprises (a) the step of coating conductive fine particles with a polymer electrolyte or a water-repellent agent and granulating the particles to multinary particles and (b) the step of forming a catalyst layer or a water-repellent layer by applying the multinary particles in the form of a layer.
摘要:
A polymer electrolyte type fuel cell comprising a hydrogen ion conductive polymer electrolyte film, an anode and a cathode holding the hydrogen ion conductive polymer electrolyte film therebetween, an anode side conductive separator plate having a gas flow channel for feeding fuel gas to the anode, and a cathode side conductive separator plate having a gas flow channel for feeding oxidant gas to the cathode, wherein the anode side and cathode side conductive separator plates are rectangular with one longer side having inlet side oxidant gas manifold holes disposed therein and the other longer side having outlet side oxidant gas manifold holes disposed therein, and fuel gas manifold holes and cooling water manifold holes have their inlets and outlets respectively disposed on the different shorter sides so that the fuel gas manifold holes are opposed to the cooling water manifold holes. And the oxidant gas manifold hole, fuel gas manifold hole and cooling water manifold hole differ in the opening configuration from each other.
摘要:
The present invention provides a polymer electrolyte fuel cell stack that includes a cell laminate having a plurality of unit cells, which are laid one upon another and each of which includes a polymer electrolyte membrane, a pair of electrodes that are arranged across the polymer electrolyte membrane and respectively have a catalytic reaction layer, a separator having means for feeding a supply of fuel gas containing hydrogen gas to one of the electrodes, and another separator having means for feeding a supply of oxidant gas to the other of the electrodes. In the polymer electrolyte fuel cell stack, a sealing portion is disposed at least in the vicinity of each electrode. The polymer electrolyte fuel cell stack of the present invention has excellent durability and productivity. Gasket sealing portions, a sealing portion for cooling water, and sealing portions for water and gas in an internal humidifying unit are constituted by a polymer compound that has polyisobutylene as the backbone structure. This arrangement ensures the high reliability.