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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
DE60237570D1
Publication/Patent Number: DE60237570D1
Publication date: 2010-10-21
Application number: 60237570
Filing date: 2002-02-21
Assignee: Hitachi Ltd.
3
US7709131B2
Publication/Patent Number: US7709131B2
Publication date: 2010-05-04
Application number: 11/205,081
Filing date: 2005-08-17
Assignee: Hitachi, Ltd.
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
4
CN1910777B
Publication/Patent Number: CN1910777B
Publication date: 2010-05-05
Application number: 200580002812
Filing date: 2005-01-17
Abstract: A fuel container for a fuel cell
5
US7659028B2
Publication/Patent Number: US7659028B2
Publication date: 2010-02-09
Application number: 10/845,144
Filing date: 2004-05-14
Assignee: Hitachi, Ltd.
Abstract: This invention provides an electrode for a polymer electrolyte fuel cell which fuel cell contains: a solid polymer electrolyte membrane; electrode layers formed respectively on both faces of the electrolyte membrane; two reinforcing members which cover respective outer surfaces of the electrode layers; and a sealing member which covers, extending from respective end faces to respective end parts of the reinforcing members, whole peripheries of the two reinforcing members, wherein the electrolyte membrane, the electrode layers and the reinforcing members are integrally formed by the sealing member. This invention provides an electrode for a polymer electrolyte fuel cell which fuel cell contains: a solid polymer electrolyte membrane; electrode layers formed respectively on both faces of the electrolyte membrane; two reinforcing members which cover respective outer surfaces ...more ...less
6
US7766032B2
Publication/Patent Number: US7766032B2
Publication date: 2010-08-03
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
7
DE60237340D1
Publication/Patent Number: DE60237340D1
Publication date: 2010-09-30
Application number: 60237340
Filing date: 2002-08-21
Assignee: Hitachi Ltd.
8
EP1296398B1
Publication/Patent Number: EP1296398B1
Publication date: 2010-08-18
Application number: 02018238.2
Filing date: 2002-08-21
Assignee: Hitachi, Ltd.
Abstract: An object of the present invention is to provide a highly durable solid polymer electrolyte (1) that has a deterioration resistance equal to or higher than that of the fluorine-containing solid polymer electrolytes or a deterioration resistance sufficient for practical purposes, and can be produced at a low cost. According to the present invention, there is provided a solid polymer electrolyte comprising a polyether ether sulfone that is used as an electrolyte and has sulfoalkyl groups bonded to its aromatic rings and represented by the general formula -(CH 2 ) n -SO 3 H. An object of the present invention is to provide a highly durable solid polymer electrolyte (1) that has a deterioration resistance equal to or higher than that of the fluorine-containing solid polymer electrolytes or a deterioration resistance sufficient for practical purposes ...more ...less
9
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
10
CN101427409A
Publication/Patent Number: CN101427409A
Publication date: 2009-05-06
Application number: 200680052788
Filing date: 2006-03-28
Assignee: Hitachi Ltd.
Abstract: In transmission current density measurement by the Gottesfeld's method and methanol permeability coefficient measurement by gas chromatography and liquid chromatography
11
US7572302B2
Publication/Patent Number: US7572302B2
Publication date: 2009-08-11
Application number: 11/062,598
Filing date: 2005-02-22
Assignee: Hitachi Ltd.
Abstract: Disclosed is a sheet-like chemical cell including a plurality of unit cells each of which comprises an electrolyte membrane, a plurality of anode plates on one surface of the electrolyte membrane, and a plurality of cathode plates on the other surface of the electrolyte membrane, with the anode and the cathode plates opposed to each other in pairs with the membrane therebetween. Slots are provided in the electrolyte membrane between adjacent anodes and adjacent cathodes, and cathode and anode wiring layers, on thermoplastic sheets, are provided to sandwich the electrolyte membrane. forming a laminate. The laminate is heat-crimped, with wiring layers on both sides of the membrane being electrically connected through the slots, and thermoplastic resin, of the thermoplastic sheets, filling the slots. Also disclosed are methods of making such cells. Disclosed is a sheet-like chemical cell including a plurality of unit cells each of which comprises an electrolyte membrane, a plurality of anode plates on one surface of the electrolyte membrane, and a plurality of cathode plates on the other surface of the electrolyte ...more ...less
12
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
13
US7541107B2
Publication/Patent Number: US7541107B2
Publication date: 2009-06-02
Application number: 10/921,268
Filing date: 2004-08-19
Assignee: Hitachi, Ltd.
Abstract: An object of the present invention is to provide a highly durable solid polymer electrolyte that has a deterioration resistance equal to or higher than that of the fluorine-containing solid polymer electrolytes or a deterioration resistance sufficient for practical purposes, and can be produced at a low cost. According to the present invention, there is provided a solid polymer electrolyte comprising a polyether ether sulfone that is used as an electrolyte and has sulfoalkyl groups bonded to its aromatic rings and represented by the general formula —(CH2)n—SO3H. An object of the present invention is to provide a highly durable solid polymer electrolyte that has a deterioration resistance equal to or higher than that of the fluorine-containing solid polymer electrolytes or a deterioration resistance sufficient for practical purposes, and ...more ...less
14
HK1103171A1
Publication/Patent Number: HK1103171A1
Publication date: 2009-07-03
Application number: 07107527
Filing date: 2007-07-13
IPC: H01M
15
US7560185B2
Publication/Patent Number: US7560185B2
Publication date: 2009-07-14
Application number: 11/176,397
Filing date: 2005-07-08
Assignee: Hitachi, Ltd
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
US7553574B2
Publication/Patent Number: US7553574B2
Publication date: 2009-06-30
Application number: 11/176,373
Filing date: 2005-07-08
Assignee: Hitachi, Ltd
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: CH2nSO3H  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: CH2nSO3H  FORMULA 1 wherein “n” is 1, 2, 3, 4, 5, or 6. The solid polymer ...more ...less
17
US7323266B2
Publication/Patent Number: US7323266B2
Publication date: 2008-01-29
Application number: 10/687,600
Filing date: 2003-10-20
Assignee: Hitachi, Ltd.
Abstract: Provided is a sheet chemical cell of a simple and easy-fabricated structure having a small number of parts that can improve the energy density strikingly, a manufacturing method thereof, a fuel cell, and a manufacturing method thereof. Also provided is a sheet chemical cell including a plurality of unit cells each of which includes an electrolyte membrane, a plurality of anode plates on one surface of the electrolyte membrane, and a plurality of cathode plates on the other surface of the electrolyte membrane, with the anode and cathode plates opposed to each other in pairs with the membrane therebetween, and slots through the electrolyte membrane so that wiring plates of respective anode and cathode plates are electrically connected through the membrane via the slots to provide cells connected in series. Provided is a sheet chemical cell of a simple and easy-fabricated structure having a small number of parts that can improve the energy density strikingly, a manufacturing method thereof, a fuel cell, and a manufacturing method thereof. Also provided is a sheet chemical cell ...more ...less
18
KR20080094070A
Publication/Patent Number: KR20080094070A
Publication date: 2008-10-22
Application number: 20087020201
Filing date: 2008-08-19
Abstract: In transmission current density measurement by the Gottesfeld's method and methanol permeability coefficient measurement by gas chromatography and liquid chromatography
19
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
20
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