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1
US7855032B2
Publication/Patent Number: US7855032B2
Publication date: 2010-12-21
Application number: 35/702,506
Filing date: 2006-02-21
Abstract: The present invention provides a fuel cell having an anode to oxidize liquid fuel
2
US2009246570A1
Publication/Patent Number: US2009246570A1
Publication date: 2009-10-01
Application number: 12/280,008
Filing date: 2006-03-28
Abstract: When using a measurement of a crossover current density by the Gotesfeld method or a measurement of a methanol permeation coefficient by gas chromatography or by liquid chromatography, a measure for crossover amount may be given but the interrelation with a crossover loss is not clearly known and thus, it could not be possible to evaluate a degree of the crossover loss. The present invention has for its object the provision of a novel measuring method that is able to measure a methanol crossover loss directly. The measuring method is characterized by measuring a crossover loss of MEA for methanol fuel cell from a difference between a voltage when a cathode catalyst layer is not influenced by methanol crossover and a voltage when the cathode catalyst layer is influenced by the methanol crossover. When using a measurement of a crossover current density by the Gotesfeld method or a measurement of a methanol permeation coefficient by gas chromatography or by liquid chromatography, a measure for crossover amount may be given but the interrelation with a crossover loss is not ...more ...less
3
US2009291348A1
Publication/Patent Number: US2009291348A1
Publication date: 2009-11-26
Application number: 11/721,447
Filing date: 2004-12-14
Abstract: The present invention provides an electrolyte membrane with high proton conductivity and low methanol permeability, a high output MEA and DMFC. The electrolyte membrane is characterized by comprising a metal oxide hydrate having proton conductivity and an organic polymer having proton conductivity. A preferable metal oxide hydrate is zirconium oxide hydrate or tungsten oxide hydrate. The composite electrolyte membrane has an ion exchange capacity of 0.75 to 1.67 meq/g as a preferable range. The composite electrolyte membrane constituted by the metal oxide hydrate and the organic polymer is provided with high proton conductivity and low methanol permeability so that MEA for DMFC with high output is provided. The present invention provides an electrolyte membrane with high proton conductivity and low methanol permeability, a high output MEA and DMFC. The electrolyte membrane is characterized by comprising a metal oxide hydrate having proton conductivity and an organic polymer having ...more ...less
4
US2008272128A1
Publication/Patent Number: US2008272128A1
Publication date: 2008-11-06
Application number: 10/586,685
Filing date: 2005-01-17
Abstract: A fuel container for a fuel cell, comprises a liquid fuel chamber having a space for the storage of liquid fuel, a valve disposed in an outlet of the liquid fuel chamber to discharge the liquid fuel from the space or stop the discharge, a partition wall member movable through the space toward the valve, and a compressed gas chamber communicating with the space and storing compressed gas, the compressed gas imparting a back pressure to the partition wall member so that the partition wall member moves through the space toward the valve, the liquid fuel chamber and the compressed gas chamber being integral with each other. This fuel container is used as a fuel container for replenishing fuel to a fuel container installed in a fuel cell or can be installed into a fuel cell. A fuel container for a fuel cell, comprises a liquid fuel chamber having a space for the storage of liquid fuel, a valve disposed in an outlet of the liquid fuel chamber to discharge the liquid fuel from the space or stop the discharge, a partition wall member movable through ...more ...less
5
US2008241631A1
Publication/Patent Number: US2008241631A1
Publication date: 2008-10-02
Application number: 10/586,686
Filing date: 2005-01-17
Abstract: A fuel container for a fuel cell, comprises a container body, the container body having a liquid fuel chamber for the storage of liquid fuel and a discharge means accommodating chamber for accommodating means for discharging the liquid fuel, a valve disposed in the container body to discharge or shut off the liquid fuel, and a partition wall member disposed slidably in the interior of the container body, wherein the partition wall member partitions the interior of the container body into the liquid fuel chamber and the discharge means accommodating chamber, the liquid fuel chamber and the discharge means accommodating chamber are in communication with each other through the partition wall member, and at least one of sliding surfaces of the container body and the partition wall member contains a material of a low frictional coefficient. A fuel container for a fuel cell, comprises a container body, the container body having a liquid fuel chamber for the storage of liquid fuel and a discharge means accommodating chamber for accommodating means for discharging the liquid fuel, a valve disposed in the container ...more ...less
6
US2007072038A1
Publication/Patent Number: US2007072038A1
Publication date: 2007-03-29
Application number: 11/359,372
Filing date: 2006-02-23
Abstract: A fuel cartridge is applicable to the fuel cell comprising an anode, a cathode, a polymer electrolyte membrane and a fuel wicking structure for feeding liquid fuel to the anode. The fuel cartridge comprises a fuel container and a porous fuel transport wick. The porous fuel transport for transporting the liquid fuel to the fuel cell, is incorporated in the fuel container. The fuel cartridge is configured to feed the liquid fuel stored in the cartridge to the fuel cell through the porous fuel transport wick, with assist of the negative capillary attraction which occurs in the fuel wicking structure depending on fuel consumption at the anode. A fuel cartridge is applicable to the fuel cell comprising an anode, a cathode, a polymer electrolyte membrane and a fuel wicking structure for feeding liquid fuel to the anode. The fuel cartridge comprises a fuel container and a porous fuel transport wick. The porous fuel ...more ...less
7
US2007072037A1
Publication/Patent Number: US2007072037A1
Publication date: 2007-03-29
Application number: 11/357,025
Filing date: 2006-02-21
Abstract: The present invention provides a fuel cell having an anode to oxidize liquid fuel, a cathode to reduce oxygen, and a solid polymer electrolyte membrane formed between said anode and said cathode, wherein: a porous body, which faces the porous anode, having continuous micro pores which form a liquid fuel feed channel by capillary force and continuous micro pores which do not have liquid retentivity is used; and the liquid fuel is supplied by the capillary negative pressure generated at the anode. The present invention provides a fuel cell having an anode to oxidize liquid fuel, a cathode to reduce oxygen, and a solid polymer electrolyte membrane formed between said anode and said cathode, wherein: a porous body, which faces the porous anode, having continuous micro pores ...more ...less
8
US2007224484A1
Publication/Patent Number: US2007224484A1
Publication date: 2007-09-27
Application number: 11/589,097
Filing date: 2006-10-30
Abstract: A fuel cell comprises a fuel vessel, a unit cell, a fuel transport member. The fuel vessel is formed with a fuel chamber section for retaining a liquid fuel and a fuel tank section for supply the fuel to the fuel chamber section. The unit cell is placed on the fuel chamber section so that the fuel is fed from the fuel chamber section. The fuel transport member has first pores for retaining the fuel by a capillary attraction and second pores allowing the passage of a gas by not retaining the fuel. The fuel transport is placed in the fuel chamber section. A fuel-gas exchange section is provided between the fuel chamber section and the fuel tank section to lead the gas in the fuel chamber into the fuel tank section and to lead the fuel in the fuel tank section into the fuel chamber section. A vent hole is provided to a wall of the fuel chamber section to exhaust the gas in the fuel chamber section. A fuel cell comprises a fuel vessel, a unit cell, a fuel transport member. The fuel vessel is formed with a fuel chamber section for retaining a liquid fuel and a fuel tank section for supply the fuel to the fuel chamber section. The unit cell is placed on the fuel chamber ...more ...less
9
US2007178344A1
Publication/Patent Number: US2007178344A1
Publication date: 2007-08-02
Application number: 11/713,727
Filing date: 2007-03-05
Abstract: An electronic apparatus includes a power generation panel having a film/electrode assembly formed by joining an electrolyte film, an anode electrode and a cathode electrode, and a fuel supply layer for supplying fuel to the film/electrode assembly. The electronic apparatus further includes a main body having a semiconductor circuit for performing operational processing, and a cover member for covering the main body. When a power supply for the electronic apparatus is turned on, a space is provided between the power generation panel and the main body. An electronic apparatus includes a power generation panel having a film/electrode assembly formed by joining an electrolyte film, an anode electrode and a cathode electrode, and a fuel supply layer for supplying fuel to the film/electrode assembly. The electronic apparatus ...more ...less
10
WO2007110969A1
Publication/Patent Number: WO2007110969A1
Publication date: 2007-10-04
Application number: 2006307023
Filing date: 2006-03-28
Abstract: In transmission current density measurement by the Gottesfeld's method and methanol permeability coefficient measurement by gas chromatography and liquid chromatography
11
US2006046126A1
Publication/Patent Number: US2006046126A1
Publication date: 2006-03-02
Application number: 11/211,654
Filing date: 2005-08-26
Abstract: A fuel cell, which comprises a plurality of fuel cell units each comprising an anode for oxidizing fuel, a cathode for reducing oxygen, an membrane/electrode assembly sandwiched between the anode and the cathode, wherein the fuel cell units are arranged in a plane to constitute power generation unit, a plurality of the power generation unit being stacked by means of insulating plates. The disclosure is also concerned with an information terminal mounting the fuel cell. A fuel cell, which comprises a plurality of fuel cell units each comprising an anode for oxidizing fuel, a cathode for reducing oxygen, an membrane/electrode assembly sandwiched between the anode and the cathode, wherein the fuel cell units are arranged in a plane to constitute ...more ...less
12
US2006115703A1
Publication/Patent Number: US2006115703A1
Publication date: 2006-06-01
Application number: 11/205,081
Filing date: 2005-08-17
Abstract: A fuel cell endplate to be combined with a membrane/electrode assembly comprising a high-polymer electrolytic membrane and electrodes sandwiching the membrane; which comprises a resin substrate, a collector plate and a gasket; the collector plate being in contact with the surface of the resin substrate and the membrane/electrode assembly; the gasket being provided so as to surround the periphery of the collector plate; a terminal connector connected to the collector plate and being disposed at a position where it does not contact with the membrane/electrode assembly. A fuel cell endplate to be combined with a membrane/electrode assembly comprising a high-polymer electrolytic membrane and electrodes sandwiching the membrane; which comprises a resin substrate, a collector plate and a gasket; the collector plate being in contact with the ...more ...less
13
US2006008688A1
Publication/Patent Number: US2006008688A1
Publication date: 2006-01-12
Application number: 11/060,476
Filing date: 2005-02-18
Abstract: An object of the present invention is to provide a fuel cell having a structure capable of generating a large cell output power. According to the present invention, there is provided a fuel cell including an anode for oxidizing liquid fuel, a cathode for reducing oxygen, an electrolyte membrane provided between the above described anode and the above described cathode, a fuel chamber for storing liquid fuel to be fed to the above described anode, and a unit for ventilating between the outside and the inside of the fuel chamber and for blocking liquid, wherein the pressure inside the fuel chamber is higher than the pressure outside the fuel chamber. An object of the present invention is to provide a fuel cell having a structure capable of generating a large cell output power. According to the present invention, there is provided a fuel cell including an anode for oxidizing liquid fuel, a cathode for reducing oxygen, an ...more ...less
14
US2006008693A1
Publication/Patent Number: US2006008693A1
Publication date: 2006-01-12
Application number: 11/058,370
Filing date: 2005-02-16
Abstract: An object of the present invention is to provide a fuel cell having a structure capable of generating a large cell output power. According to the present invention, there is provided a fuel cell including an anode for oxidizing liquid fuel, a cathode for reducing oxygen, an electrolyte membrane provided between the above described anode and the above described cathode, a fuel chamber for holding liquid fuel to be fed to the anode, an exhaust gas module having a gas-liquid separation function arranged so as to permit ventilation between the inside and the outside of the fuel chamber. An object of the present invention is to provide a fuel cell having a structure capable of generating a large cell output power. According to the present invention, there is provided a fuel cell including an anode for oxidizing liquid fuel, a cathode for reducing oxygen, an ...more ...less
15
US2006292417A1
Publication/Patent Number: US2006292417A1
Publication date: 2006-12-28
Application number: 11/176,397
Filing date: 2005-07-08
Abstract: A solid polymer electrolyte is made up of a polymer compound having a hydrocarbon aromatic group in the backbone thereof and including a side chain expressed by FORMULA 1: wherein “n” is 1, 2, 3, 4, 5, or 6. The solid polymer electrolyte may be incorporated into a membrane and may be used in a solution for covering an electrode catalyst. A solid polymer electrolyte is made up of a polymer compound having a hydrocarbon aromatic group in the backbone thereof and including a side chain expressed by FORMULA 1: wherein “n” is 1, 2, 3, 4, 5, or 6. The solid polymer electrolyte may be ...more ...less
16
WO2006064542A1
Publication/Patent Number: WO2006064542A1
Publication date: 2006-06-22
Application number: 2004018613
Filing date: 2004-12-14
Abstract: An electrolyte membrane having both of high proton conducting and low methanol permeating properties; and a high-output MEA
17
US2005282048A1
Publication/Patent Number: US2005282048A1
Publication date: 2005-12-22
Application number: 11/152,368
Filing date: 2005-06-15
Abstract: An aqueous solution fuel is fed to a fuel cell by using a propellant gas composed of a pressure has or pressure-liquefied gas. The aqueous solution fuel and the propellant gas are held in an exchangeable fuel cartridge. An ejector for ejecting the aqueous solution fuel from the fuel cartridge to the fuel cell with the propellant gas is provided at the side of the fuel cartridge or at the side of the fuel cell. An aqueous solution fuel is fed to a fuel cell by using a propellant gas composed of a pressure has or pressure-liquefied gas. The aqueous solution fuel and the propellant gas are held in an exchangeable fuel cartridge. An ejector for ejecting the aqueous solution fuel from the ...more ...less
18
US2005158605A1
Publication/Patent Number: US2005158605A1
Publication date: 2005-07-21
Application number: 11/028,237
Filing date: 2005-01-04
Abstract: An object of the present invention is to provide a fuel cell whose generated output can be prevented from decreasing owing to the influence of impurities present in fuel, by reducing the production of an electrical short circuit between single cells which make a potential diffe