WO2003050902A2 - Method for the production of a plate and plate - Google Patents

Method for the production of a plate and plate Download PDF

Info

Publication number
WO2003050902A2
WO2003050902A2 PCT/EP2002/013997 EP0213997W WO03050902A2 WO 2003050902 A2 WO2003050902 A2 WO 2003050902A2 EP 0213997 W EP0213997 W EP 0213997W WO 03050902 A2 WO03050902 A2 WO 03050902A2
Authority
WO
Grant status
Application
Patent type
Prior art keywords
plate
layer
different
layers
starting mixture
Prior art date
Application number
PCT/EP2002/013997
Other languages
German (de)
French (fr)
Other versions
WO2003050902A3 (en )
Inventor
Günter Rinn
Volker Banhardt
Dietrich Kehr
Original Assignee
Schunk Kohlenstofftechnik Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0297Arrangements for joining electrodes, reservoir layers, heat exchange units or bipolar separators to each other
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/96Carbon-based electrodes
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0202Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0204Non-porous and characterised by the material
    • H01M8/0223Composites
    • H01M8/0228Composites in the form of layered or coated products
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0202Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/0263Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/56Manufacturing of fuel cells

Abstract

The invention relates to a method for the production of a plate, comprising a thermally-hardening and/or thermoplastic plastic with carbon filler, with a filler proportion of preferably 70 wt. % to 95 wt. %, whereby a starting mixture containing the plastic and the carbon filler is filled in a press mould and moulded to give the plate by means of a pressing tool. According to the invention, the plate may have the desired properties, whereby the starting mixture is fed to the press mould in portions in layers or regions and the supplied portions are serially subjected to the desired pressing parameters.

Description

description

A method of manufacturing a disk and plate

The invention relates to a method for producing a plate comprising at least two layers of different composition and / or different chemical and / or physical properties, in particular intended for a Brennstoffzellei wherein as at least one starting mixture to form a layer, a heat-exchangeable and / or thermoplastic plastic with carbon filler with a filler content by weight of preferably 70.% to 95 wt.% is used, and wherein the Ausgangsxnischungen introduced into a press mold and under pressure at least partly, preferably fully heat cured. Furthermore, the invention refers to a plate, in particular bipolar plate intended for a fuel cell or the separator plate or electrode plate consisting of several layers of different chemical and / or physical properties, wherein the layers consist of the same or different starting mixtures, wherein at least one layer of a thermosetting and / or thermoplastic resin and a carbon filler with a filler proportion of preferably 70 wt% to 95 wt% is.

In fuel cells, chemical energy can be converted at high efficiency directly into electricity. The basic principle is realized by a spatial separation of reactants, such as hydrogen or methanol on the one hand and oxygen or air on the other hand by a ionenleitfahigen electrolyte such as polymer electrolyte membrane on both sides with porous electrodes - is in contact - the anode and the cathode. In this manner, a chemical reaction between hydrogen and oxygen can not explosively proceed as oxyhydrogen gas reaction but carried out so controlled that an exchange of electrons between the Reaktionspartnem via an external circuit, and thus supplies the electrical energy.

The electrodes are often made of one provided with a catalyst layer of soot deposited on the membrane, wherein the catalyst used is preferably platinum, but other suitable metals such as palladium.

The supply of the reactants to the electrodes may be via the bipolar plates, which consist of a thermosetting plastic with carbon filler with a filler proportion of particularly 70 wt% to 95 wt%. In the electrode-facing surfaces of the bipolar plates channels are recessed, along the flow, the reactants. Is supplied as a reaction gas hydrogen to the anode of the fuel cell, so in the catalyst layer of Artode cations are formed, and simultaneously emitted electrons at the electron-conducting anode. As the oxidizing agent oxygen or air to the cathode side of the cell is supplied. the reaction gas is reduced oxygen uptake by the io- nenleitfähige membrane diffused hydrogen ions (protons) and the current flowing through the external circuit from the anode to the cathode. This reaction proceeds in the catalyst layer of the cathode that is contacted with the membrane. The reaction product is water. The reaction enthalpy is released in the form of electrical energy and heat.

So that the reactants reach a sufficient extent with the respective electrode or the water present in this catalyst in contact, a diffusion layer is disposed between the respective electrode and the bipolar plate. Thus, the electrode is not covered by the existing between the channels of the bipolar plate webs or walls, whereby, otherwise, the efficiency may be impaired. Decisive parameters for achieving a high efficiency are a quick and complete as possible supply and removal of reactants and products at the active centers of the electrodes and an optimum water balance in the membrane.

Drying of the membrane can drastically decrease the proton conductivity; however, water serüberschuss leads to blockage of the pores in the gas diffusion layer, and finally to clog the gas ducts.

Typically, the problem of an optimum water content over the entire active area of ​​the design and arrangement of the gas guide channels attempting to solve the bipolar plate. Simultaneously, either external or internal humidification systems are used.

From DE 195 42 721 Al it is known to form plastic-filler mixtures by extrusion into sheets, which may be intended for electrical and electrochemical purposes. By extruding conditionally supplied to the extruder mixes must adhere to certain temperatures to ensure a mass claim.

In DE 26 35 636 C2 discloses a fuel cell and a method for producing such is described. In this case, paths of electrode material and webs are joined by non-woven material, are punched to achieve a desired geometry of the plates made from these openings to provide at a desired finished fuel chambers, channels, and passages.

From WO 96/33520 a graphitized composite material is known which is used for the production of plates of fuel cells.

DE 198 29 142 Al relates to a gas barrier composite of Bipolaφlatte and membrane-electrode assembly of polymer electrolyte membrane fuel cells. Also bipolar plates with cooling channels are known which consist of two plate-shaped superimposed portions, the superposed surfaces mutually aligned channel-like depressions, which form the cooling passages. The plattenrormigen sections themselves are bonded by adhesive, thereby sacrificing reference must be made to the conductivity of the bipolar plate in the field of connection points into account.

An electrode material for fuel cells according to the DE 35 12 326 Al has an integrated press molded five-layer structure. The starting materials for the electrode material in a mold are inputted in succession, in order then to obtain a finished structure together by means of compression molding, post-curing and calcination. Corresponding structures produced as a unit can be re-entered into a printing form, if appropriate, to connect them to each other by interposing a graphite sheet.

The present invention is based on the problem even further develop a method for producing a plate and such a such a way that layers of desired properties can be achieved with simple measures, wherein an individual design of the plate should be possible. At the same time a good water balance to be ensured for a membrane with the use of the plate for a fuel cell. A humidification system should not be necessary or only in a simplified form.

According to the invention the problem is solved by a method of the aforementioned type substantially by the following steps

Introducing a first starting mixture in the printing form and at least partially heat curing of the starting mixture under pressure to form a first layer,

Introducing a second feed mixture to the first layer in the printing plate and at least partly heat-curing the second starting mixture respectively introduced each introduction of a starting mixture to previously in the printing forme at least partially heat-cured layer and at least partially curing under pressure to form the second layer and accordingly trainee further layers of starting mixture under pressure.

According to the invention a single plate is prepared by specifically obtaining supplies of the starting mixtures, and the successive formation of the individual layers of desired chemical or physical characteristics in their final properties. However, it may consist of these same starting mixtures due to the individual configuration of the individual layers, due to differing pressure loadings and temperatures in their physical properties, particularly porosity can be set differently. Thus, for example, may be formed liquid-tightly to a flat side of a plate porous, and the other flat side without different starting mixtures are necessary. Rather, the porosity can be adjusted simply by varying pressure effects.

In other words, the different material properties can be achieved in that the mold portions, a starting mixture of the same composition is supplied, and is then performed after the supplying respective portion of the pressing operation, wherein different portions of different pressing parameters may be suspended.

In particular that at least one top layer of the plate is made hydrophilic by for example oxidizable post-treatment such as wet-chemically or by corona or Plassmabe- treatment is provided.

A plate of the aforementioned type is characterized in that it consists of successive at least partly thermoset when pressure is applied layers which in turn are connected to each other by heat and pressure in forming respective layer. The plate may be structured in at least one of its flat sides by, for example, molded channels, wherein the flat sides are formed differently porous. Of course, each flat side of the plate may be structured wherein a flat surface when used as Bipolaφlatte, namely the porous flat side of the cathode and the denser flat side of the anode of a membrane electrode assembly (MEA) may face.

According to a development of the invention, the porous cathode side is rendered hydrophilic with conventional additives or process or post-treated. When the gas guide channels are arranged such that the inlet and outlet are closely adjacent, water can penetrie- ren of the water-rich outlet side through the pore system for dry inlet side and moisten the incoming air. Excess water will wet the surface well plate and discharged as a film; a closing of pores and channels by drop-shaped water is thus avoided.

Depending on the membrane thickness and the operating conditions of the cathode-side humidification of the membrane is sufficient to ensure the optimum water content; if necessary, but the anomalous denseitige fuel gas prior to entry needs to be dampened in the fuel cell.

The combination of a porous surface layer with fine-structured channels may in particular be unnecessary on the anode side the use of a gas diffusion layer. The fuel gas can reach the catalyst layer on the entire surface membrane over the porous structure of the webs between the channels. By not using a Gasdiffüsionsschicht are lower contact resistance, ie reduced resistive losses and better efficiency attainable.

Furthermore, there is the possibility that the top layer of the panel contains at least one hydrophilic additive, such as silica gel. Further details, advantages and features of the invention will become apparent not only from the claims and in the features they contain - singly and / or in combination - but also from the following description of exemplary embodiments.

example 1

intended for the production of a plastic-filler mixture for a Bipolaφlatte 850 g of graphite of a fraction from 0 to 200 microns, and 150 g of phenolic resin were mixed in a mixer at a temperature of 80 ° over a period of 10 min as the mixture constituents. After discharging the mixture from the mixer and solidification of the mass of a mill was fed to gain ground material a fraction less than 1 mm. A preweighed and volumetric dose mass of the mixture is then filled a hot-pressing tool in a pressing mold (die) to close then by axial, that is vertical movement of the upper ram of the press. After placing the upper punch to the mass whose softening, compacting and curing begins as a result of contact of the molding compound with the hot Stempelwandungen. A first weighed and volumetric dose mass is subjected to a pressure of 50 MPa. In this way the mass is compressed almost pore'nfrei. After curing, the mass of the Pressste pel is retracted to fill a second weighed and volumetric dose mass in the die. Then carrying out a pressing process again, but the pressure was changed to 5 MPa. Thus shows the layer formed by the second weighed volumetrically metered mass a pore volume of 25%. Due to the hydrophilic nature of phenolic resin, the plate is well wetted by water.

example 2

intended for the production of a plastic-filler mixture for a Bipolaφlatte 950 g of graphite of a fraction from 5 to 100 microns and 50 g of phenolic resin were mixed in a mixer at a temperature of 80 ° over a period of 10 min as the mixture constituents. After discharging the mixture from the mixer and solidification of the mass was se a mill fed to gain ground material a fraction less than 1 mm. A pre-weighed and volumetric dose mass of the mixture is then filled a hot-pressing tool in a pressing mold (die) to close then by axial, that is vertical movement of the upper ram of the press. After placing the upper punch to the mass whose softening, compacting and curing begins as a result of contact of the molding compound with the hot Stempelwandungen. A first weighed and volumetric dose mass is subjected to a pressure of 50 MPa. In this way the mass is compressed almost pore-free. After curing, the mass of the press plunger is retracted to fill a second weighed and volumetric dose mass in the die. Then carrying out a pressing process again, but the pressure was changed to 25 MPa. Thus shows the coating layer formed by the second weighed volumetrically metered mass, a pore volume of 15-20% on.

Due to the low binder content, a relatively high pore volume will also include at the higher molding pressure. The improved contact of the graphite particles in the porous layer leads to a lower electric resistance of the multilayer board.

example 3

intended for the production of a plastic-filler mixture for a Bipolaφlatte 850 g of graphite of a fraction from 0 to 200 microns, and 150 g of epoxy resin mixed in a mixer at a temperature of 80 ° over a period of 10 min as the mixture constituents. After discharging the mixture from the mixer and solidification of the mass of a mill was fed to gain ground material a fraction less than 1 mm. A pre-weighed and volumetric dose mass of the mixture is then filled a hot-pressing tool in a pressing mold (die) to close by axial, thus vertically moving the upper ram of the press. After placing the upper punch to the mass whose softening, compacting and curing begins as a result of contact of the molding compound with the hot Stempelwandungen. A first weighed and volumetric dose mass is subjected to a pressure of 50 MPa. In this way the mass is compressed almost pore-free. After curing, the mass of the press plunger is retracted to fill a second weighed and volumetric dose mass in the die. Then carrying out a pressing process again, but the pressure was changed to 5 MPa. Thus shows the layer formed by the second weighed volumetrically metered mass a pore volume of 25%.

example 4

intended for the production of a plastic-filler mixture for a Bipolaφlatte 850 g of graphite of a fraction from 0 to 200 microns, and 150 g of epoxy resin mixed in a mixer at a temperature of 80 ° over a period of 10 min as the mixture constituents. After discharging the mixture from the mixer and solidification of the mass of a mill was fed to gain ground material a fraction less than 1 mm. A pre-weighed and volumetric dose mass of the mixture is filled a hot-pressing tool in a pressing mold (die) to close then by axial, that is vertical movement of the upper ram of the press. After placing the upper punch to the mass whose softening, compacting and curing begins as a result of contact of the molding compound with the hot Stempelwandungen. A first weighed and volumetric dose mass is subjected to a pressure of 50 MPa. In this way the mass is compressed almost pore-free. After curing, the mass of the press plunger is retracted to fill a second weighed and volumetric dose mass in the die. Then carrying out a pressing process again, but the pressure was changed to 25 MPa. Thus shows the layer formed by the second weighed volumetrically metered mass, a pore volume of 15-20% on.

Due to the low binder content, a relatively high pore volume will also include at the higher molding pressure. The improved contact of the graphite particles in the porous layer leads to a lower electric resistance of the multilayer board. By using epoxy resin in Examples 3 and 4, the plates are hydrophobic after forming. A hydrophilic setting is by oxidative treatment (wet-chemical or by corona or plasma treatment) possible.

The invention is also explained below by reference to the drawings of exemplary embodiments to be taken, from which further the invention will defining characteristics.

Show it:

Fig. 1 is an exploded perspective view of a portion of a

fuel cell,

Fig. 2 is a schematic representation of a pressing tool and

Fig. 3 is a schematic diagram of an embodiment of a Bipolaφlatte.

In Fig. 1, a Aussclinitt a fuel cell is shown purely schematically and in exploded view, wherein a membrane electrode assembly (MEA) 10 is disposed between two Bipolaφlatten 12, 14. in the exemplary embodiment 12 this case, the Bipolaφlatte to a homogeneous structure with the same characteristics in each region, whereas the Bipolaφlatte 14 from regions 16, 18 is composed having different properties. Thus, the area 16 may be more porous than the area of ​​the 18th

Independently of this, there are the Bipolaφlatten 12, 14 made of a thermosetting and / or thermoplastic plastic with carbon filler with a filler proportion of particularly 70 wt% to 95 wt%. In that regard, however, refer to well-known techniques. Also, should the Bipolaφlatten 12, 14 at least on the of the membrane electrode assembly facing 10 surface 20 preferably meandering extending channels 92, which may be divided into sections which have, through which a reactant - anode side hydrogen or methane and the cathode side air or oxygen can flow. The membrane electrode assembly 10 includes a cation permeable membrane 24, along the faces of a soot layer with a noble metal catalyst such as platinum or palladium, as the anode 26 and cathode are arranged 28th Anode 26 and cathode 28 are in turn covered by a respective Gasdifrussionsschicht 30, 32, the channels 22 of the Bipolaφlatten 12, 14 cover at composite unit consisting of the Bipolaφlatten 12, 14 and the membrane electrode assembly 10 entirely, but at the same time the possibility provide that in the channels 22 flowing reactants themselves, so that the desired chemical reaction to proceed with high efficiency over the entire electrode surfaces 26, can distribute 28th

In accordance with the inventive teaching the Bipolaφlatten from portions of different material compositions or differing chemical or physical properties can be made.

In Fig. 3 is a Bipolaφlatte exemplified 34 having a cuboid Trägerköφer 36 and on this known a structure formed by channels 38, 40, 42, 44, 46 layer is 48, the layer 48 has a greater porosity than the base plate 36 has. The base plate 36 and the layer 48 are not separately formed portions of the Bipolaφlatte 34 but are successively in a pressing tool 50 (Fig. 2) was prepared, which may be a hot-pressing tool.

The pressing tool 50 includes a die or a die 52 having a geometry of a panel to be produced predetermining interior 54 and an axially adjustable in this press plunger 56th

For the formation of layers corresponding to those of Fig. 3 with different material properties and / or physical or chemical properties in the die, that is, the interior of which is filled 54 layers 58, 60, 62 in succession, after introduction of each layer in this, the ram 56 applied for molding. The pressing parameters of the ram 56 can be set differently, so as z. B. adjust the porosity of the individual layers 58, 60, 62 different. Thus, with the same starting mixture a board can be produced having layers of different material properties such as porosity. Of course, the individual layers can also show different material compositions.

By way of example, the layer 58 has a composition of 95% graphite a fraction of 50 to 100 microns and 50% of phenolic resin, the layer 60 and 62, a composition 85% of graphite of a fraction from 0 to 200 microns and 15% phenolic resin. After introduction of a particular layer of the pressing cylinder 56 acts with a pressure of 25 MPa and 50 MPa and 5 MPa. The layers 58, 60, 62 a Bipolaφlatte thus prepared have the following physical properties:

Density porosity mean pore size

62 1.55 g / cm 3 21.5% 2.0 microns

60 1.95 g / cm 3 0.0% ./.

58 1.75 g / cm 3 15.0% 1 5 microns.

The porous structure allows z. B. at a Bipolaφlatte a smooth transport of water, so that there is no risk that channels are blocked by water drops.

Claims

claims
A method of manufacturing a disk and plate
1. A method of manufacturing a plate (12, 14, 34) consisting of at least two layers (36, 48, 58, 60, 62) of different composition and / or different chemical and / or physical properties, in particular intended for a fuel cell, wherein as at least one starting mixture to form a layer, a heat-exchangeable and / or thermoplastic plastic with carbon filler blended with a filler of preferably 70.% o to 95 wt.% is used, and wherein the starting mixtures introduced into a press mold and under pressure at least in part, be fully thermally cured, preferably, characterized by the method steps
Introducing a first starting mixture in the printing form and at least partially heat curing of the starting mixture under pressure to form a first layer,
Introducing a second feed mixture to the first layer in the printing plate and at least partly heat-curing the second starting mixture respectively introduced each introduction of a starting mixture to previously in the printing forme at least partially heat-cured layer and at least partially curing under pressure to form the second layer and accordingly trainee further layers of starting mixture under pressure.
The method of claim 1, d ad urch g ek ted b y ei c HNET be used for different layers that same starting mixtures.
3. The method of claim 1 or 2, d ABy g ekennze i chn et that the same and / or different starting mixtures of different print parameters and / or different temperatures.
4. The method according to at least one of the preceding claims, characterized in that at least one top layer (48) of the plate is made hydrophilic by for example oxidizable post-treatment such as wet-chemically or by corona or plasma treatment.
5. The method according to at least one of the preceding claims, d ABy ge characterizing zei seframe that porosity of a layer is adjusted by acting on the corresponding starting mixture pressure and temperature.
6. The method according to at least one of the preceding claims, d ad urch g ekennz ei et chn that are exposed to achieve divergent porosity of layers of the same starting mixture, these different pressures and / or temperatures.
7. plate (12, 14, 34), in particular Bipolaφlatte intended for a fuel cell or Separatoφlatte or electrode plate consisting of several layers of different chemical and / or physical properties, wherein the layers of the same or different starting mixtures consist, at least a layer of thermosetting and / or thermoplastic resin and a carbon filler with a filler proportion of preferably 70 wt%> consists to 95 wt%>, characterized in that the plate (12, 14, 34) of successive when pressure is applied at least partially heat-cured layers (12, 14, 34), which in turn are connected to each other by heat and pressure in forming respective layer.
8. Plate according to claim 7, characterized in that the plate (14, 34) in at least one of its flat sides by, for example, molded-in channels (38, 40, 42, 44, 46) is structured and in that the flat sides are different porous.
9. Plate according to claim 7 or 8, characterized in that the respective flat side of the plate (34) is structured.
10. Plate according to at least one of claims 7 to 9, characterized in that the cover layer (48) of the plate (34) at least one hydrophilic additive, such as silica gel.
11. Plate according to at least one of claims 7 to 10, characterized in that at least one top layer (48), preferably all the covering layers of the plate (34) are made hydrophilic.
PCT/EP2002/013997 2001-12-11 2002-12-10 Method for the production of a plate and plate WO2003050902A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10160706.7 2001-12-11
DE2001160706 DE10160706A1 (en) 2001-12-11 2001-12-11 A method of manufacturing a disk and plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2002361039A AU2002361039A8 (en) 2001-12-11 2002-12-10 Method for the production of a plate and plate

Publications (2)

Publication Number Publication Date
WO2003050902A2 true true WO2003050902A2 (en) 2003-06-19
WO2003050902A3 true WO2003050902A3 (en) 2004-06-10

Family

ID=7708733

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/013997 WO2003050902A3 (en) 2001-12-11 2002-12-10 Method for the production of a plate and plate

Country Status (2)

Country Link
DE (1) DE10160706A1 (en)
WO (1) WO2003050902A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7534510B2 (en) 2004-09-03 2009-05-19 The Gillette Company Fuel compositions

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011120802A1 (en) 2011-12-10 2013-06-13 Daimler Ag Plastic bipolar plate for fuel cell, has inner region formed from electrically conductive material, and peripheral region formed from electrically insulating material such as thermoplastic resin

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0330124A2 (en) * 1988-02-24 1989-08-30 Toray Industries, Inc. Electroconductive integrated substrate and process for producing the same
US5338320A (en) * 1989-10-17 1994-08-16 Kureha Kagaku Kogyo Kabushiki Kaisha Flat plate-like ribbed porous carbon material and manufacturing method therefor
US6039823A (en) * 1995-04-20 2000-03-21 International Fuel Cells Composite article
WO2000016424A1 (en) * 1998-09-16 2000-03-23 Schunk Kohlenstofftechnik Gmbh Plastic plate and method for producing the same
EP1020942A1 (en) * 1997-05-14 2000-07-19 SANYO ELECTRIC Co., Ltd. Solid polymer fuel cell capable of stably providing excellent power generation characteristics
WO2001005571A1 (en) * 1999-07-15 2001-01-25 Teledyne Energy Systems, Inc. Improved conductivity fuel cell collector plate and method of fabrication

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7509675A (en) * 1975-08-14 1977-02-16 Stamicarbon A method for manufacturing an electro-chemical cell or battery, for example, a fuel cell or fuel cell battery, and according to this method produced cell or battery.
JPS60236461A (en) * 1984-04-04 1985-11-25 Kureha Chem Ind Co Ltd Electrode substrate for fuel cell and its manufacture
DE3642605C2 (en) * 1986-12-13 1995-06-08 Ringsdorff Werke Gmbh Electrode for electrochemical processes and using the electrode
DE19542721A1 (en) * 1995-11-16 1997-05-22 Sgl Technik Gmbh A process for producing shaped bodies of plastic-filler mixtures with a high content of fillers
DE19829142A1 (en) * 1998-06-30 2000-01-05 Manhattan Scientifics Inc Gas-tight composite of a bipolar plate and membrane electrode assembly of polymer electrolyte membrane fuel cells

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0330124A2 (en) * 1988-02-24 1989-08-30 Toray Industries, Inc. Electroconductive integrated substrate and process for producing the same
US5338320A (en) * 1989-10-17 1994-08-16 Kureha Kagaku Kogyo Kabushiki Kaisha Flat plate-like ribbed porous carbon material and manufacturing method therefor
US6039823A (en) * 1995-04-20 2000-03-21 International Fuel Cells Composite article
EP1020942A1 (en) * 1997-05-14 2000-07-19 SANYO ELECTRIC Co., Ltd. Solid polymer fuel cell capable of stably providing excellent power generation characteristics
WO2000016424A1 (en) * 1998-09-16 2000-03-23 Schunk Kohlenstofftechnik Gmbh Plastic plate and method for producing the same
WO2001005571A1 (en) * 1999-07-15 2001-01-25 Teledyne Energy Systems, Inc. Improved conductivity fuel cell collector plate and method of fabrication

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7534510B2 (en) 2004-09-03 2009-05-19 The Gillette Company Fuel compositions
US7989117B2 (en) 2004-09-03 2011-08-02 The Gillette Company Fuel compositions

Also Published As

Publication number Publication date Type
DE10160706A1 (en) 2003-06-26 application
WO2003050902A3 (en) 2004-06-10 application

Similar Documents

Publication Publication Date Title
US5300370A (en) Laminated fluid flow field assembly for electrochemical fuel cells
US20020192530A1 (en) Fuel cell that can stably generate electricity with excellent characteristics
US20060127735A1 (en) Membrane based electrochemical cell stacks
US5702839A (en) Manufacture of electrodes
US6607857B2 (en) Fuel cell separator plate having controlled fiber orientation and method of manufacture
US20080149900A1 (en) Process for producing carbon-cladded composite bipolar plates for fuel cells
US20040062974A1 (en) Separator plate for PEM fuel cell
EP0933825A2 (en) Separator for fuel cell and manufacturing method for the same
US20030124414A1 (en) Porous carbon body for a fuel cell having an electronically conductive hydrophilic agent
US6291091B1 (en) Continuous method for manufacturing a Laminated electrolyte and electrode assembly
US20020076597A1 (en) Monopolar cell pack of proton exchange membrane fuel cell and direct methanol fuel cell
US4769296A (en) Batteries comprising high energy and power density methanol/air fuel cells
US5976726A (en) Electrochemical cell with fluid distribution layer having integral sealing capability
US20050252603A1 (en) Compression mould for making a membrane electrode assembly
US20040110057A1 (en) Separator for fuel cell and fuel cell therewith
US6395416B1 (en) Separator for fuel battery and method of producing the same
US20040214071A1 (en) Substrate
US3553032A (en) Method of making a fuel cell electrode by thermal decomposition of silver carbonate
US6921598B2 (en) Polymer electrolyte fuel cell and method of manufacturing the same
US20070215461A1 (en) Membrane Electrode Assembly for Use in Electochmical Devices
JPH08162123A (en) Polymer electrolytic electrochemical cell and its manufacture
WO2002043173A1 (en) Electrochemical polymer electrolyte membrane cell stacks
EP1246281A1 (en) Polymer electrolyte type fuel cell and production method therefor
JPH103931A (en) Manufacture of fuel cell separator, and the separator
Kim et al. A novel process to fabricate membrane electrode assemblies for proton exchange membrane fuel cells

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LU MC NL PT SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase in:

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP