摘要:
A polymer electrolyte fuel cell which includes a pair of electrodes, a polymer electrolyte membrane interposed between the pair of the electrodes, a first conductive separator having a channel for supplying an oxidant gas to one of the electrodes therethrough, and a second conductive separator having a channel for supplying a fuel gas to the other of the electrodes therethrough, wherein at least one of the electrodes includes a porous catalyst layer formed on the surface of the polymer electrolyte membrane, or formed on the surface of a porous conductive base.
摘要:
A fuel cell includes an electrolyte membrane, a pair of anode-side and cathode-side catalyst layers, a pair of an anode gas diffusion layer and a cathode gas diffusion layer, and a pair of an anode-side separator and a cathode-side separator. Also adjusted in the fuel cell is at least one of a fine pore diameter and a content of a water repellent agent in the anode gas diffusion layer and the cathode gas diffusion layer, so as to satisfy the following equation (1): −0.07≦(Ya−Xa)/((Ya−Xa)+(Yc−Xc))≦0.15 (1) wherein Xa represents a water feeding amount in the fuel gas thus fed, Ya represents a water discharging amount in the discharged fuel gas, Xc represents a water feeding amount in the oxidizing gas thus fed, and Yc represents a water discharging amount in the discharged oxidizing gas.
摘要:
A separator for a polymer electrolyte fuel cell, which contains electrically conductive carbon and a binder that binds the electrically conductive carbon, comprises a reaction gas passage formed on at least a main surface thereof, wherein a water droplet falling angle of a surface the reaction gas passage is not less than 5 degrees and not more than 45 degrees when a water droplet of not less than 50 μL and not more than 80 μL is dropped under a condition in which ambient temperature is not lower than 50° C. and not higher than 90° C. and relative humidity is not less than 70% and not more than 100%.
摘要:
The present invention provides a gas diffusion layer for a fuel cell which has proper rigidity, is easy to handle and contributes to the improvement of the productivity of fuel cells. A method for producing a gas diffusion layer for a fuel cell including a first step of: impregnating a conductive porous substrate made of a conductive carbon fiber cloth or conductive carbon fiber felt with a first dispersion containing a first fluorocarbon resin having thermoplasticity; and baking the first conductive porous substrate at a first baking temperature of not less than the melting point of the first fluorocarbon resin and less than the decomposition temperature of the first fluorocarbon resin to enhance the rigidity of the conductive porous substrate.
摘要:
In order to effectively supply and demand electric power between an electric power supplier and a node or a group of nodes individually having an electric power generator, the present invention provides an electric power supply and demand management system capable of obtaining the difference between the total of electric power supplied from the electric power supplier to the node or group and the total of electric power consumed by the electric power loads of the node or group and capable of transmitting information for increasing/decreasing the amount of electric power supply so that the difference becomes smaller to the electric power supplier.
摘要:
The present invention provides a gas diffusion layer for a fuel cell which has proper rigidity, is easy to handle and contributes to the improvement of the productivity of fuel cells. A method for producing a gas diffusion layer for a fuel cell including a first step of: impregnating a conductive porous substrate made of a conductive carbon fiber cloth or conductive carbon fiber felt with a first dispersion containing a first fluorocarbon resin having thermoplasticity; and baking the first conductive porous substrate at a first baking temperature of not less than the melting point of the first fluorocarbon resin and less than the decomposition temperature of the first fluorocarbon resin to enhance the rigidity of the conductive porous substrate.
摘要:
There is provided a polymer electrolyte fuel cell capable of: sufficiently suppressing the progress of drying of the polymer electrolyte in the catalyst layers and of the polymer electrolyte membrane, and in addition, the occurrence of flooding, even if the moistened conditions of the fuel gas or the oxidant gas fed to the fuel cell change; suppressing the degradation of the anode, cathode and polymer electrolyte membrane; and thus reducing the deterioration of the cell performance readily and reliably. The polymer electrolyte fuel cell includes: a polymer electrolyte membrane; an anode and a cathode which are arranged in such a manner as to hold the polymer electrolyte membrane between them; and a pair of separators having a first gas flow path for feeding fuel gas to the anode and discharging fuel gas from the anode and a second gas flow path for feeding oxidant gas to the cathode and discharging oxidant gas from the cathode, where a notched portion is made on each of the anode and the cathode in such a position so as to allow the two notched portions to face each other, the polymer electrolyte membrane is held by the pair of separators in that position, and the polymer electrolyte membrane is supported by reinforcing members having gas permeability in the notches.
摘要:
A polymer electrolyte fuel cell comprising a hydrogen-ion conductive polymer electrolyte membrane, an anode and a cathode sandwiching the hydrogen-ion conductive polymer electrolyte membrane, an anode-side conductive separator plate having gas flow channels for supplying a fuel gas to the anode, and a cathode-side conductive separator plate having gas flow channels for supplying an oxidant gas to the cathode, wherein the anode-side and cathode-side conductive separator plates have a substantially rectangular part in contact with the anode or cathode in which the length of a longer side is equal to or more than twice the length of a shorter side, and the oxidant gas flow channels have a linear part formed along the longer side of the rectangular part.
摘要:
The invention relates to a polymer electrolyte fuel cell comprising a polymer electrolyte film of hydrogen ion conduction; an anode and a cathode between which the electrolyte film is placed; a conductive separator having a channel through which fuel gas is supplied to the anode, and a conductive separator having a channel through which oxidative gas is supplied to the cathode. The conventional conductive separator uses a carbon material that is unlikely to be less costly, and an attempt has been made to use a metal plate in place of the carbon material. Since the metal plate is exposed to an oxidizing atmosphere at high temperature for a long time, however, corrosion may occur, disadvantageously causing the efficiency of power generation to decrease gradually. The polymer electrolyte fuel cell of this invention uses an acid-resistant conductive airtight elastomer as a conductive separator for substantial cost reduction.
摘要:
The durability of a polymer electrolyte fuel cell is very significantly improved by using a tightening pressure of about 2 to 4 kgf/cm2 of area of electrode; or a tightening pressure of about 4 to 8 kgf/cm2 of contact area between electrode and separator plate; or by selecting a value not exceeding about 1.5 mS/cm2 for the short-circuit conductivity attributed to the DC resistance component in each unit cell; or by selecting a value not exceeding about 3 mA/cm2 for the hydrogen leak current per area of electrode of each MEA. Further, in a method of manufacturing or an inspection method for a polymer electrolyte fuel cell stack, fuel cells having high durability can be efficiently manufactured by removing such MEAs or unit cells using such MEAs or such cell stacks having short-circuit conductivity values and/or hydrogen leak current values exceeding predetermined values, respectively.
摘要翻译:通过使用约2至4kgf / cm 2的电极面积的紧固压力,可以显着改善聚合物电解质燃料电池的耐久性; 或约4〜8kgf / cm 2的电极与隔离板之间的接触面积的紧固压力; 或通过选择不超过约1.5mS / cm 2的值,对于每个晶胞中的直流电阻分量导致的短路导电率; 或者通过为每个MEA的电极面积的氢泄漏电流选择不超过约3mA / cm 2的值。 此外,在聚合物电解质燃料电池堆的制造方法或检查方法中,通过使用这样的MEA或这种具有短路导电性值的电池组除去这样的MEA或单元电池,能够有效地制造具有高耐久性的燃料电池,和/ 或氢泄漏电流值分别超过预定值。