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1 US2005048352A1
Fuel-cell device utilizing surface-migration on solid oxide
Publication/Patent Number: US2005048352A1 Publication Date: 2005-03-03 Application Number: 10/924,917 Filing Date: 2004-08-25 Inventor: Horiuchi, Michio   Suganuma, Shigeaki   Watanabe, Misa   Assignee: SHINKO ELECTRIC INDUSTRIES CO., LTD.   IPC: H01M008/02 Abstract: The present invention relates to a fuel-cell device utilizing surface-migration on solid oxide wherein a cathode layer and an anode layer are arranged in parallel to each other on one surface of the substrate. A strip-shaped cathode layer formed from SSC or the like and a strip-shaped permeable anode layer formed from a rhenium metal powder or the like are arranged in parallel and spaced apart from each other on one surface of the substrate. A fluid fuel such as ethanol is fed to the entire surface of the anode layer so as to permeate therethrough. Oxygen ions formed at the cathode layer exposed to the atmosphere migrate over a surface region on the substrate and react with the fuel species supplied to the anode layer. The cathode layer and the anode layer formed on the substrate together constitute a fuel cell. The present invention relates to a fuel-cell device utilizing surface-migration on solid oxide wherein a cathode layer and an anode layer are arranged in parallel to each other on one surface of the substrate. A strip-shaped cathode layer formed from SSC or the like and a ...More ...Less
2 US2005019648A1
Fuel cell stack design and method of operation
Publication/Patent Number: US2005019648A1 Publication Date: 2005-01-27 Application Number: 10/917,038 Filing Date: 2004-08-12 Inventor: Rapaport, Pinkhas   Rock, Jeffrey   Bosco, Andrew   Salvador, John   Paine, Lesley   Gasteiger, Hubert   Assignee: Rapaport, Pinkhas   Rock, Jeffrey   Bosco, Andrew   Salvador, John   Paine, Lesley   Gasteiger, Hubert   IPC: H01M008/02 Abstract: A hydrogen fuel cell stack has at least two segments of fuel cells each having reactant gas passages. The reactant gas passages of each fuel cell in each segment are arranged in parallel with each other. Flow of fuel cell fluids is in a gravity assisted downward direction. Gravity assisted flow directs water formed in each cell to lower removal points of the stack segments. Adjacent segments are separated by either a separator segment formed as an integral unit with the stack or the segments are joined and an external piping system directs flow to differing stack areas. A cathode flow enters at a first stack end and a hydrogen anode flow enters the stack at an opposite end, such that cathode and anode flows are counter-current to each other. A coolant flow is normally injected adjacent to and flows parallel with the cathode flow, but can also be directed by the piping system to any or all segments in series or parallel. A hydrogen fuel cell stack has at least two segments of fuel cells each having reactant gas passages. The reactant gas passages of each fuel cell in each segment are arranged in parallel with each other. Flow of fuel cell fluids is in a gravity assisted downward direction ...More ...Less
3 US2005136317A1
Molded multi-part flow field structure
Publication/Patent Number: US2005136317A1 Publication Date: 2005-06-23 Application Number: 10/740,985 Filing Date: 2003-12-19 Inventor: Ferguson, Dennis   Assignee: 3M Innovative Properties Company   IPC: H01M008/02 Abstract: A molded multi-part flow field structure includes a molded flow field plate formed of a conductive material comprising a first polymer. A molded frame is disposed around the flow field plate and formed of a non-conductive material comprising a second polymer. The molded flow field plate and frame preferably define a unipolar flow field structure. Manifolds are formed in the molded frame, and a molded gasket arrangement is disposed proximate a periphery of the manifolds. A molded coupling arrangement may be formed to extend from the frame and configured to couple the flow field structure with other unipolar flow field structures to define a continuous web of the unipolar flow field structures. A molded multi-part flow field structure includes a molded flow field plate formed of a conductive material comprising a first polymer. A molded frame is disposed around the flow field plate and formed of a non-conductive material comprising a second polymer. The molded flow ...More ...Less
4 US2005153192A1
Fuel cell
Publication/Patent Number: US2005153192A1 Publication Date: 2005-07-14 Application Number: 11/023,754 Filing Date: 2004-12-28 Inventor: Nakagawa, Takaki   Tanaka, Hiroyuki   Kosaka, Takashi   Yoshida, Takahiro   Sugita, Narutoshi   Goto, Shuhei   Sugiura, Seiji   Nishiyama, Tadashi   Assignee: Nakagawa, Takaki   Tanaka, Hiroyuki   Kosaka, Takashi   Yoshida, Takahiro   Sugita, Narutoshi   Goto, Shuhei   Sugiura, Seiji   Nishiyama, Tadashi   IPC: H01M008/02 Abstract: A fuel cell includes a membrane electrode assembly and first and second metal separators sandwiching the membrane electrode assembly. A first cell voltage terminal for detecting a voltage generated in the membrane electrode assembly is formed integrally with an outer region of the first metal separator. The first cell voltage terminal extends outwardly from the first metal separator. A first seal member covers the outer region of the first metal separator, and includes a first extension seal which covers the first cell voltage terminal to a position near a tip end of the first cell voltage terminal. A fuel cell includes a membrane electrode assembly and first and second metal separators sandwiching the membrane electrode assembly. A first cell voltage terminal for detecting a voltage generated in the membrane electrode assembly is formed integrally with an outer region of ...More ...Less
5 US2005130021A1
Fuel cell and power chip technology
Publication/Patent Number: US2005130021A1 Publication Date: 2005-06-16 Application Number: 10/985,736 Filing Date: 2004-11-09 Inventor: Marsh, Stephen   Assignee: Integrated Fuel Cell Technologies, Inc.   IPC: H01M008/02 Abstract: A fuel cell is disclosed which is formed on a semiconductor wafer by etching channel in the wafer and forming a proton exchange membrane PEM barrier in the etched channel. The barrier divides the channel into two. A hydrogen fuel is admitted into one of the divided channels and an oxidant into the other. The hydrogen reacts with a catalyst formed on an anode electrode at the hydrogen side of the channel to release hydrogen ions (protons) which are absorbed into the PEM. The protons migrate through the PEM and recombine with return hydrogen electrons on a cathode electrode on the oxygen side of the PEM and the oxygen to form water. A fuel cell is disclosed which is formed on a semiconductor wafer by etching channel in the wafer and forming a proton exchange membrane PEM barrier in the etched channel. The barrier divides the channel into two. A hydrogen fuel is admitted into one of the divided channels and ...More ...Less
6 US2005118489A1
Modified gas outlet for improved reactant handling in fuel cell separator plates
Publication/Patent Number: US2005118489A1 Publication Date: 2005-06-02 Application Number: 10/992,933 Filing Date: 2004-11-19 Inventor: Frederiksen, Henning   Grahl-madsen, Laila   Lundsgaard, Jorgen   Thomas, David   Assignee: Frederiksen, Henning   Grahl-Madsen, Laila   Lundsgaard, Jorgen   Thomas, David   IPC: H01M008/02 Abstract: Electrode separator plate gas outlets are provided which have been modified in comparison to a standard electrode separator plate gas outlet to increase gas flow velocity and promote release of trapped water droplets in the flow field and gas outlet.
7 US2005014052A1
Apparatus for supplying an oxygen-containing gas to a fuel cell system
Publication/Patent Number: US2005014052A1 Publication Date: 2005-01-20 Application Number: 10/487,532 Filing Date: 2002-08-28 Inventor: Kaufmann, Lars   Assignee: Kaufmann, Lars   IPC: H01M008/02 Abstract: A fuel cell system (1) comprises at least one fuel cell (2) and at least one gas generation system (6) in which at least one component requires air during operation. A compression device (11) is provided to supply the oxygen-containing gas, for example air, to the cathode chamber (4) of the fuel cell. At least one branch line (13) also supplies oxygen-containing gas to the gas generation system component(s) that requires air during operation thereof. Exhaust gases from the fuel cell cathode chamber anode chamber are combined downstream of the fuel cell. A fuel cell system (1) comprises at least one fuel cell (2) and at least one gas generation system (6) in which at least one component requires air during operation. A compression device (11) is provided to supply the oxygen-containing gas, for example air, to the cathode ...More ...Less
8 US2005064270A1
Fuel cell bipolar separator plate
Publication/Patent Number: US2005064270A1 Publication Date: 2005-03-24 Application Number: 10/669,242 Filing Date: 2003-09-24 Inventor: Marianowski, Leonard   Assignee: Marianowski, Leonard   IPC: H01M008/02 Abstract: A bipolar separator plate for a fuel cell stack constructed of at least two coextensive sheet metal elements shaped to promote the distribution of reactant gases to the electrodes of the fuel cell units of the fuel cell stack. The coextensive sheet metal elements are corrugated and fitted together to form at least one coolant flow channel between corresponding peaks, or valleys, of the corrugations of the sheet metal elements. A bipolar separator plate for a fuel cell stack constructed of at least two coextensive sheet metal elements shaped to promote the distribution of reactant gases to the electrodes of the fuel cell units of the fuel cell stack. The coextensive sheet metal elements are corrugated ...More ...Less
9 US2005089744A1
Composite material for bipolar plate
Publication/Patent Number: US2005089744A1 Publication Date: 2005-04-28 Application Number: 10/966,031 Filing Date: 2004-10-18 Inventor: Kim, Hyoung-juhn   Eun, Yeong-chan   Cho, Sung-yong   Kweon, Ho-jin   Moon, Jin-kyoung   Lee, Dong-hun   Kim, Ju-yong   An, Seong-jin   Assignee: Kim, Hyoung-Juhn   Eun, Yeong-Chan   Cho, Sung-Yong   Kweon, Ho-Jin   Moon, Jin-Kyoung   Lee, Dong-Hun   Kim, Ju-Yong   An, Seong-Jin   IPC: H01M008/02 Abstract: A composite material for a bipolar plate of fuel cells is comprised of conductive carbon dispersed in polybenzoxazine matrix. The present invention also provides a composite material for preparing a bipolar plate for fuel cells comprising a polymer where a volume reduction percent is less than 5%, preferably 3%, and more preferably 1% after polymerization of the monomers with respect to total volume of the monomers before the polymerization thereof, and conductive carbon. The polymers of the present invention have good workability since there is little volume change during polymerization, and good mechanical and chemical properties, and they can be manufactured at a low cost. A composite material for a bipolar plate of fuel cells is comprised of conductive carbon dispersed in polybenzoxazine matrix. The present invention also provides a composite material for preparing a bipolar plate for fuel cells comprising a polymer where a volume reduction ...More ...Less
10 US2005074660A1
Three way valve assembly
Publication/Patent Number: US2005074660A1 Publication Date: 2005-04-07 Application Number: 10/886,932 Filing Date: 2004-07-08 Inventor: Linder, James   Ulschmid, Todd   Assignee: Linder, James   Ulschmid, Todd   IPC: H01M008/02 Abstract: Improved three way valves comprise three openings aligned to directly connect with a corresponding series of ports and a selectively positionable seal that regulates the flow of a fluid within the valve. Improved fuel cells comprise a plurality of flow channels connected to at least one improved three way valve suitable for regulating fluid flow through the fuel cell. Generally, the flow channels comprise a series of ports, wherein the three way valve is configured to engage and disengage from the series of ports directly to form a manifold without the use of additional connectors, for example, tubes and/or hoses. Due to the fact that the three way valve can engage and disengage form the series of ports directly, potential leakage points in the fuel cell piping system can be reduced. In some embodiments, the three way valve comprises a central chamber having a selectively positionable seal, a bypass chamber and a through chamber. Generally, the selectively positionable seal can form a seal selectively at the port, or passage, connecting the central chamber with the bypass chamber or with the through chamber. The selectively positionable seal can regulate fluid flow from the central chamber to the bypass chamber and to the through chamber. Improved three way valves comprise three openings aligned to directly connect with a corresponding series of ports and a selectively positionable seal that regulates the flow of a fluid within the valve. Improved fuel cells comprise a plurality of flow channels connected to at ...More ...Less
11 US2005221154A1
Fuel cell reactant flow fields that maximize planform utilization
Publication/Patent Number: US2005221154A1 Publication Date: 2005-10-06 Application Number: 10/816,403 Filing Date: 2004-04-01 Inventor: Guthrie, Robin   Assignee: Guthrie, Robin   IPC: H01M008/02 Abstract: Fuel cell reactant gas flow field plates (53, 84, 104) have flow channels (71, 98, 105, 106), with transverse portions (73, 100, 109) some of which have more than one groove (78, 79; 101, 103; 111, 112; 117, 118), thereby to adjust the planform shape of the reactant gas flow field. Fuel cell reactant gas flow field plates (53, 84, 104) have flow channels (71, 98, 105, 106), with transverse portions (73, 100, 109) some of which have more than one groove (78, 79; 101, 103; 111, 112; 117, 118), thereby to adjust the planform shape of the reactant gas flow ...More ...Less
12 US2005214628A1
Inertial pump for moving gases in a micro fuel cell
Publication/Patent Number: US2005214628A1 Publication Date: 2005-09-29 Application Number: 11/090,365 Filing Date: 2005-03-25 Inventor: Pristash, David   Assignee: Pemery Corp.   IPC: H01M008/02 Abstract: A fuel cell device includes at least one and preferably two gas storage chambers, the gas storage chambers being connected via gas flow channels to a fuel cell membrane, such as a proton exchange membrane. A piston in each gas storage chamber moves to compress the gas upon being subject to an acceleration force. A flow control opens upon a predetermined condition being achieved to provide the compressed gases to a fuel cell membrane. A fuel cell device includes at least one and preferably two gas storage chambers, the gas storage chambers being connected via gas flow channels to a fuel cell membrane, such as a proton exchange membrane. A piston in each gas storage chamber moves to compress the gas upon being ...More ...Less
13 US2005181264A1
Capillary layer on flowfield for water management in PEM fuel cell
Publication/Patent Number: US2005181264A1 Publication Date: 2005-08-18 Application Number: 10/780,025 Filing Date: 2004-02-17 Inventor: Gu, Wenbin   Fly, Gerald   Mathias, Mark   Assignee: Gu, Wenbin   Fly, Gerald   Mathias, Mark   IPC: H01M008/02 Abstract: The present invention is directed to an electroconductive element within an electrochemical cell that improves water management. The electroconductive element comprises an impermeable electrically conductive element and a porous liquid distribution media disposed along a major surface of the conductive element. Preferably, the liquid distribution media is in direct contact and fluid communication with a fluid distribution layer disposed between the membrane electrode assembly (MEA) and the liquid distribution media, so that liquids are drawn from the MEA through the fluid distribution layer to and through the liquid distribution media. The liquid distribution media transports liquids away from the MEA in the fuel cell. Methods of fabricating and operating fuel cells and electroconductive elements according to the present invention are also contemplated. The present invention is directed to an electroconductive element within an electrochemical cell that improves water management. The electroconductive element comprises an impermeable electrically conductive element and a porous liquid distribution media disposed along a major ...More ...Less
14 US2005170234A1
Solid Oxide Fuel Cell With Internal Reforming, Catalyzed Interconnect For Use Therewith, and Methods
Publication/Patent Number: US2005170234A1 Publication Date: 2005-08-04 Application Number: 10/708,042 Filing Date: 2004-02-04 Inventor: Liu, Di-jia   Guan, Jie   Minh, Nguyen   Assignee: General Electric Company   IPC: H01M008/02 Abstract: A catalyzed interconnect for an SOFC electrically connects an anode and an anodic current collector and comprises a metallic substrate, which provides space between the anode and anodic current collector for fuel gas flow over at least a portion of the anode, and a catalytic coating on the metallic substrate comprising a catalyst for catalyzing hydrocarbon fuel in the fuel gas to hydrogen rich reformate. An SOFC including the catalyzed anodic inter-connect, a method for operating an SOFC, and a method for making a catalyzed anodic interconnect are also disclosed. A catalyzed interconnect for an SOFC electrically connects an anode and an anodic current collector and comprises a metallic substrate, which provides space between the anode and anodic current collector for fuel gas flow over at least a portion of the anode, and a catalytic ...More ...Less
15 US2005164064A1
Stack of generators and fuel cell system having the same
Publication/Patent Number: US2005164064A1 Publication Date: 2005-07-28 Application Number: 11/041,932 Filing Date: 2005-01-26 Inventor: Cho, Sung-yong   Kweon, Ho-jin   Kim, Hyoung-juhn   Kim, Ju-yong   Eun, Yeong-chan   An, Seong-jin   Lee, Dong-hun   Assignee: Cho, Sung-Yong   Kweon, Ho-Jin   Kim, Hyoung-Juhn   Kim, Ju-Yong   Eun, Yeong-Chan   An, Seong-Jin   Lee, Dong-Hun   IPC: H01M008/02 Abstract: The present invention is a stacked fuel cell system which is formed by stacking a plurality of electricity generators, each electricity generator having a membrane-electrode assembly and a separator provided with the membrane-electrode assembly. The stack comprises an aligner which is disposed at least one portion of the separator and which couples and aligns the plurality of electricity generators. The present invention is a stacked fuel cell system which is formed by stacking a plurality of electricity generators, each electricity generator having a membrane-electrode assembly and a separator provided with the membrane-electrode assembly. The stack comprises an aligner ...More ...Less
16 US2005164070A1
Extruded bipolar plates
Publication/Patent Number: US2005164070A1 Publication Date: 2005-07-28 Application Number: 10/765,822 Filing Date: 2004-01-27 Inventor: Krajewski, Paul   Mishra, Raja   Assignee: Krajewski, Paul   Mishra, Raja   IPC: H01M008/02 Abstract: An extruded bipolar plate for a fuel cell. The bipolar plate is fabricated by an extrusion process so that the extruder die forms linear channels in the extrusion for the flow channels in the plate. A variety of different shapes can be provided for the flow channels. In one design, the flow channels for the cooling fluid extend through the center of the bipolar plates, and flow channels for the anode and cathode fluids are provided on the outside of the bipolar plate. Further, the sides of the bipolar plate can be formed with a recess to receive end caps to secure the plates together. In addition, the end cap can include flow channels to control the flow of the fluids to the plates when the fuel cell stack is assembled. An extruded bipolar plate for a fuel cell. The bipolar plate is fabricated by an extrusion process so that the extruder die forms linear channels in the extrusion for the flow channels in the plate. A variety of different shapes can be provided for the flow channels. In one ...More ...Less
17 US2005255361A1
Connecting structure and connecting method of fuel cell
Publication/Patent Number: US2005255361A1 Publication Date: 2005-11-17 Application Number: 11/128,203 Filing Date: 2005-05-13 Inventor: Saito, Shuichiro   Assignee: CANON KABUSHIKI KAISHA   IPC: H01M008/02 Abstract: A connecting structure of a fuel cell for connecting a fuel cartridge containing a gaseous fuel to a fuel cell body and supplying the gaseous fuel to the fuel cell body is provided which comprises a cover member of a fuel supply port provided outside of a valve of the fuel cartridge, a recess of a fuel receiving port provided in the fuel cell body for connection to the fuel supply port, a sealing member of a sealing means for keeping a connecting portion of the fuel supply port and fuel receiving port airtight, and a pin of a valve opening/closing means provided in the fuel cell body for opening/closing the valve after making the connecting portion airtight by the sealing means. A connecting structure of a fuel cell for connecting a fuel cartridge containing a gaseous fuel to a fuel cell body and supplying the gaseous fuel to the fuel cell body is provided which comprises a cover member of a fuel supply port provided outside of a valve of the fuel ...More ...Less
18 US2005255364A1