摘要:
A membrane-electrode assembly for a direct oxidation fuel cell includes an electrolyte membrane, and an anode and a cathode sandwiching said electrolyte membrane. The cathode includes a catalyst layer in contact with the electrolyte membrane and a diffusion layer formed on the catalyst layer, and the catalyst layer contains 2 to 20% by volume of pores. A direct oxidation fuel cell including this membrane-electrode assembly has excellent power generating performance and durability.
摘要:
A direct oxidation fuel cell of this invention has at least one unit cell including: a membrane-electrode assembly comprising an electrolyte membrane sandwiched between an anode and a cathode, each of the anode and the cathode including a catalyst layer and a diffusion layer; an anode-side separator with a fuel flow channel for supplying a fuel to the anode; and a cathode-side separator with an oxidant flow channel for supplying an oxidant containing oxygen gas to the cathode. The fuel flow channel and the oxidant flow channel are so structured that the concentration of the oxygen gas in the oxidant flow channel is higher at a part opposing an upstream part of the fuel flow channel than at a part opposing a downstream part of the fuel flow channel.
摘要:
A direct methanol fuel cell of the present invention includes a unit cell having an electrolyte membrane, an anode on one surface of the electrolyte membrane, and a cathode on the other surface of the electrolyte membrane. The anode includes an anode catalyst layer and an anode diffusion layer. The anode catalyst layer is in contact with a surface of the electrolyte membrane. The anode diffusion layer is in contact with a surface of the anode catalyst layer opposite to the surface of the anode catalyst layer in contact with the electrolyte membrane. A methanol flux value JGDL of the anode diffusion layer and a methanol flux value JPEM of the electrolyte membrane satisfy the following relations: JGDL=1×10−5 to 5×10−4 mol/(cm2·min.), (i) and JPEM×JGDL≦1×10−8 [mol/(cm2·min.)]2. (ii)
摘要:
A fuel cell system includes a fuel cell stack for generating power and power generation control means. The fuel cell stack has at least one cell that includes a cathode to which an oxidant is supplied, an anode to which a fuel is supplied, and a polymer electrolyte membrane sandwiched between the cathode and the anode. The power generation control means has dryness degree determination means for determining the degree of dryness of the fuel cell stack based on shut-down period. When the shut-down period is shorter than a predetermined period of time, the power generation control means supplies a gas for drying to the cathode for a predetermined period of time, to remove water remaining in the cathode. When the shut-down period is equal to or longer than the predetermined period of time, such a drying operation is not performed.
摘要:
The direct oxidation fuel cell of the invention includes at least one unit cell, the unit cell including: a membrane-electrode assembly including an anode, a cathode, and an electrolyte membrane interposed therebetween; an anode-side separator; and a cathode-side separator. The cathode includes a first cathode catalyst layer, a diffusion layer being in contact with the cathode-side separator, and an intermediate layer disposed therebetween. The intermediate layer includes a second cathode catalyst layer and a porous composite layer, the porous composite layer containing a hydrophobic material and an electron-conductive material. The anode-side separator has a fuel flow channel, and the cathode-side separator has an oxidant flow channel. At least a portion of the intermediate layer facing the upstream portion of the fuel flow channel includes the second cathode catalyst layer, and at least portions of the intermediate layer facing the midstream and downstream portions of the fuel flow channel include the porous composite layer.
摘要:
An anode electrode for use in a fuel cell comprises a stacked structure including, in sequence: a catalyst layer, a hydrophobic, microporous layer (“MPL”), a porous gas diffusion layer (“GDL”), and an anode plate with at least one recessed fuel supply-fuel/gas exhaust channel formed in a surface thereof facing the GDL, wherein the stacked structure further comprises at least one hydrophobic region aligned with the at least one recessed channel. The electrode is useful in direct oxidation fuel cells and systems, such as direct methanol fuel cells operating with highly concentrated liquid fuel.
摘要:
A fuel container for storing a fuel liquid for a fuel cell has a double wall structure including an inner container for storing a fuel liquid and an outer container for housing the inner container, and a material capable of retaining the fuel between the inner container and the outer container. A fuel cell pack includes a fuel cell and a fuel container for storing a fuel liquid for the fuel cell. The fuel cell pack includes a double wall exterior casing having an inner casing for housing the fuel cell and the fuel container and an outer casing for housing the inner casing, and a material capable of retaining the fuel between the inner casing and the outer casing.
摘要:
A direct methanol fuel cell of the present invention includes a unit cell having an electrolyte membrane, an anode on one surface of the electrolyte membrane, and a cathode on the other surface of the electrolyte membrane. The anode includes an anode catalyst layer and an anode diffusion layer. The anode catalyst layer is in contact with a surface of the electrolyte membrane. The anode diffusion layer is in contact with a surface of the anode catalyst layer opposite to the surface of the anode catalyst layer in contact with the electrolyte membrane. A methanol flux value JGDL of the anode diffusion layer and a methanol flux value JPEM of the electrolyte membrane satisfy the following relations: JGDL=1×10−5 to 5×10−4 mol/(cm2·min.), (i) and JPEM×JGDL≦1×10−8 [mol/(cm2·min.)]2. (ii)
摘要:
Disclosed is a milling and classifying apparatus, adapted to produce toner fine particles, comprising a collision mill, and an air classifier, wherein the collision mill comprises a jet nozzle room, a path, a collision plate, and a collision member mounted to a support of the collision plate at downstream of the collision plate, the air classifier comprises a dispersion room and a classification room, the classification room is disposed below the dispersion room, and a flow stabilizer is arranged at a central suction of the separator core to control swirl stream generated within the classification room so as to centrifuge the powder into coarse particles and fine particles by action of the swirl stream.
摘要:
A method for activating a direct oxidation fuel cell including an anode, a cathode, and a proton-conductive electrolyte membrane interposed between the anode and the cathode is provided. The anode and the cathode each have a catalyst layer on a face in contact with the proton-conductive electrolyte membrane. This method activates the fuel cell by passing a current through the fuel cell from an external power source, with the positive electrode and the negative electrode of the external power source connected to the anode and the cathode of the fuel cell, respectively, while supplying an organic fuel and an inert gas to the anode and the cathode, respectively.