WO2022129279A1 - Brennstoffzellenstapel und verfahren zur herstellung - Google Patents
Brennstoffzellenstapel und verfahren zur herstellung Download PDFInfo
- Publication number
- WO2022129279A1 WO2022129279A1 PCT/EP2021/086089 EP2021086089W WO2022129279A1 WO 2022129279 A1 WO2022129279 A1 WO 2022129279A1 EP 2021086089 W EP2021086089 W EP 2021086089W WO 2022129279 A1 WO2022129279 A1 WO 2022129279A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bipolar plate
- gas diffusion
- diffusion layer
- coating
- fuel cell
- Prior art date
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 64
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000009792 diffusion process Methods 0.000 claims abstract description 65
- 239000011248 coating agent Substances 0.000 claims abstract description 55
- 238000000576 coating method Methods 0.000 claims abstract description 55
- 239000012528 membrane Substances 0.000 claims abstract description 28
- 239000003792 electrolyte Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 27
- 239000012799 electrically-conductive coating Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000011231 conductive filler Substances 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 230000009974 thixotropic effect Effects 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 58
- 210000004027 cell Anatomy 0.000 description 50
- 229910001868 water Inorganic materials 0.000 description 8
- 239000001257 hydrogen Substances 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 229920000049 Carbon (fiber) Polymers 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000004917 carbon fiber Substances 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 150000002431 hydrogen Chemical class 0.000 description 5
- 239000007800 oxidant agent Substances 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 239000004809 Teflon Substances 0.000 description 4
- 229920006362 Teflon® Polymers 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000002322 conducting polymer Substances 0.000 description 2
- 229920001940 conductive polymer Polymers 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 150000002118 epoxides Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0223—Composites
- H01M8/0228—Composites in the form of layered or coated products
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0297—Arrangements for joining electrodes, reservoir layers, heat exchange units or bipolar separators to each other
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04126—Humidifying
- H01M8/04149—Humidifying by diffusion, e.g. making use of membranes
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the invention relates to a fuel cell stack comprising at least one bipolar plate, at least one gas diffusion layer and at least one electrolyte, in particular at least one membrane, with a coating being arranged between the at least one bipolar plate and the at least one gas diffusion layer. Furthermore, the invention relates to a method for producing the fuel cell stack.
- a fuel cell is an electrochemical cell that converts chemical reaction energy of a continuously supplied fuel and oxidant into electrical energy.
- a fuel cell is therefore an electrochemical energy converter.
- known fuel cells in particular hydrogen (H2) and oxygen (O2) are converted into water (H2O), electrical energy and heat.
- PEM proton exchange membranes
- Solid oxide fuel cells which are also referred to as solid oxide fuel cells (SOFC).
- SO FC fuel cells have a higher operating temperature and exhaust gas temperature than PEM fuel cells and are used in stationary operation in particular.
- Fuel cells have an anode and a cathode. The fuel is fed to the anode of the fuel cell and catalytically oxidized to protons, releasing electrons, which then reach the cathode. The electrons emitted are derived from the fuel cell and flow to the cathode via an external circuit.
- the oxidizing agent in particular atmospheric oxygen, is supplied to the cathode of the fuel cell and reacts by absorbing the electrons from the external circuit and protons to form water. The resulting water is drained from the fuel cell.
- the gross reaction is:
- a fuel cell stack usually has end plates that press the individual fuel cells together and give the fuel cell stack stability.
- the end plates also serve as the positive and negative poles of the fuel cell stack for dissipating the current.
- the electrodes ie the anode and the cathode, and the membrane can be structurally combined to form a membrane electrode assembly (MEA), which is also referred to as a membrane electrode assembly.
- MEA membrane electrode assembly
- the membrane is often coated with a catalyst and is referred to as a catalyst coated membrane (CCM).
- Fuel cell stacks also have bipolar plates, which are also referred to as gas distributor plates.
- Bipolar plates are used to evenly distribute fuel to the anode and evenly distribute oxidant to the cathode.
- bipolar plates usually have a surface structure, for example channel-like structures, for distributing the fuel and the oxidizing agent to the electrodes.
- Bipolar plates usually have a wavy profile in which channels and Alternate bars.
- the channel-like structures also serve to drain off the water produced during the reaction.
- a cooling medium for dissipating heat can be conducted through the fuel cell through the channel-like structures of the bipolar plates.
- the bipolar plates ensure a flat electrical contact with the electrolyte.
- a fuel cell stack typically comprises up to a few hundred individual fuel cells that are stacked on top of one another in what are known as sandwiches.
- the individual fuel cells generally have an MEA and a bipolar plate half on the anode side and on the cathode side.
- a fuel cell includes in particular an anode monopolar plate and a cathode monopolar plate, which are brought together and form a bipolar plate.
- the gas diffusion layer and the bipolar plate are pressed together in the fuel cell stack, resulting in an electrical contact in the form of a press contact.
- the higher the pressing force the lower the contact resistance between the gas diffusion layer and the bipolar plate.
- the risk of damage to the gas diffusion layer which is usually made up of carbon fibers that are glued together using Teflon, for example, increases at the same time.
- the risk of damage to the carbon fibers increases.
- the porosity of the gas diffusion layer decreases as a result of strong pressing, which can lead to poorer gas distribution in the fuel cell stack.
- the gas distribution over the surface, in particular over the membrane is also inhomogeneous.
- GDL gas diffusion layers
- CCM catalyst-coated membranes
- DE 11 2005 002 974 B4 describes a method for increasing the adhesive strength between elements of a fuel cell membrane electrode assembly that are to be bonded.
- a catalyst-coated, proton-conducting polymer membrane is part of a membrane-electrode unit that has a gas distribution structure and a diffusion layer on the cathode and anode side. Adhesive properties of a catalyst layer or the membrane are improved.
- a fuel cell stack comprising at least one bipolar plate, at least one gas diffusion layer and at least one electrolyte, in particular at least one membrane, is proposed, with a coating being arranged as a connecting means between the at least one bipolar plate and the at least one gas diffusion layer, and the coating being electrically conductive.
- a method for producing the fuel cell stack comprising the following steps: a. Providing the at least one bipolar plate, the at least one gas diffusion layer and the at least one electrolyte, in particular the at least one membrane, b. Application of the electrically conductive coating comprising a coating material to the at least one bipolar plate and/or the at least one gas diffusion layer, c. Stacking the at least one bipolar plate, the at least one gas diffusion layer and the at least one electrolyte, in particular the at least one membrane, and connecting the at least one bipolar plate and the at least one gas diffusion layer by means of the electrically conductive coating, so that an electrical contact is made between the at least one bipolar plate and the at least one gas diffusion layer, and d. Hardening of the coating material.
- the at least one bipolar plate and the at least one gas diffusion layer are preferably connected to one another in a materially bonded and/or form-fitting manner by means of the coating.
- the at least one bipolar plate and the at least one gas diffusion layer are more preferably bonded to one another by means of the coating. More preferably, the at least one gas diffusion layer and the at least one bipolar plate are connected to one another with a contact pressure of no more than 1.4 N/mm 2 .
- the at least one bipolar plate and the at least one gas diffusion layer are preferably stacked with a contact pressure of less than 1.4 N/mm 2 .
- the at least one bipolar plate and the at least one gas diffusion layer are particularly preferably connected to one another exclusively in a material-to-material and/or form-fitting manner.
- the gas diffusion layer preferably comprises fibers, in particular carbon fibers, and a matrix, which in particular comprises Teflon. More preferably, the at least one gas diffusion layer consists of carbon fibers and Teflon.
- the coating can preferably be molded onto the fibers of the at least one gas diffusion layer, in particular molded on, which enables the positive connection of the at least one bipolar plate and the at least one gas diffusion layer.
- the material connection can also be referred to as adhesion or glued connection.
- the at least one bipolar plate and the at least one gas diffusion layer are bonded to one another by the coating.
- the coating can also be referred to as glue or glue.
- the coating preferably has a low contact resistance between the at least one bipolar plate and the at least one gas diffusion layer.
- the contact resistance is of the order of 50 mm Ohm ⁇ cm 2 .
- the coating preferably comprises the coating material and the coating material more preferably contains an electrically conductive filler.
- the coating consists of the coating material containing the electrically conductive filler.
- a filler content is between 5% and 95%, preferably between 50% and 95%.
- the material can be, for example, an epoxy, an acrylate, polyurethane silicone, or polyester, or a mixture of these materials.
- the electrically conductive filler preferably comprises graphite and/or a metal such as silver. More preferably, the electrically conductive filler consists of graphite and/or the metal such as silver, in particular silver.
- the coating material can be a one-component adhesive or a two-component adhesive.
- the coating material preferably has a thixotropic flow behavior before curing.
- a thixotropic behavior is understood to mean that the viscosity of the coating material decreases as a result of ongoing external influences and resumes the initial viscosity after the stress has ended.
- the coating is preferably applied to the at least one bipolar plate. More preferably, the coating is only applied to parts of the bipolar plate.
- the at least one bipolar plate particularly preferably has webs and the coating is applied to the webs, in particular only to parts of the webs.
- the coating can be applied to a cathode side and/or an anode side of the bipolar plate.
- the coating material is flowable when it is applied and can be applied precisely, in particular to the webs of the at least one bipolar plate.
- the viscosity of the coating material increases suddenly, so that the coating material remains on the webs and does not flow off.
- the webs of the at least one bipolar plate preferably each have a web width in a range from 0.3 mm to 1.5 mm, more preferably from 0.5 mm to 1 mm.
- the webs of the at least one bipolar plate are preferably arranged at a distance from one another in a range from 1 mm to 2 mm, more preferably from 1.25 mm to 1.60 mm.
- Valleys which can also be referred to as channels, are preferably located between the webs.
- the valleys preferably have a depth in a range from 0.25 mm to 0.75 mm, more preferably from 0.45 mm to 0.60 mm.
- the coating material preferably covers at least the contact width of the webs.
- the curing of the coating material is preferably carried out at a temperature in a range from 10°C to 90°C, more preferably from 15°C to 80°C.
- the electrically conductive coating can be applied, for example, by dosing or screen printing methods. In the screen printing process, several areas of the at least one bipolar plate are coated, in particular simultaneously and selectively. The surface area of the bipolar plate that has a coating is between 5% and 50%. When dosing, amounts of the coating material are preferably applied in a range from 0.001 ml to 9 ml per dosing process and position.
- the at least one bipolar plate and/or the at least one gas diffusion layer are preferably pretreated by means of plasma before the electrically conductive coating is applied.
- the at least one gas diffusion layer can also form a membrane-electrode assembly together with the at least one, in particular catalyst-coated, membrane, with the at least one bipolar plate being correspondingly connected to the at least one gas diffusion layer of the membrane-electrode assembly.
- the at least one gas diffusion layer preferably has a mesoporous layer (MPL). Also the mesoporous layer containing at least one membrane and/or a frame of the membrane-electrode unit, which can also be referred to as a gasket, can be pretreated by means of plasma.
- MPL mesoporous layer
- Plasma pre-treatment increases adhesive forces, with the plasma generating reactive groups on the surface so that the coating material can bond covalently to them.
- a covalent connection of carbon fibers can take place, for example, via amine groups with an epoxide.
- the pretreatment by means of plasma is carried out in particular in an atmosphere containing air, in particular oxygen.
- the atmosphere may contain NH3, N2, SO2, H2O and/or air, among others.
- Nozzles of various designs can be used for pretreatment with plasma.
- the application of the electrically conductive coating is preferably carried out before stacking. Furthermore, it is preferable to carry out curing after stacking.
- All of the bipolar plates contained in the fuel cell stack are preferably connected to the respective adjoining gas diffusion layer by means of the coating.
- FIG. 1 shows a fuel cell stack according to the prior art
- FIG. 2 shows a fuel cell stack according to the invention
- Figure 4 shows a cross section of a bipolar plate
- Figure 5 shows a section of a cross section of a bipolar plate
- FIG. 6 shows a schematic representation of a method for producing a fuel cell stack.
- FIG. 1 shows a fuel cell stack 1 according to the prior art.
- the fuel cell stack 1 comprises a layering of bipolar plates 3 and gas diffusion layers 5.
- a membrane 7 is also shown.
- An electrical contact 17 is produced between a gas diffusion layer 5 and a bipolar plate 3 in each case by means of a contact pressure 15 .
- Hydrogen 19 flows through the bipolar plates 3 on the one hand and air 21 and water 23 on the other hand, which each reach the membrane 7 through a gas diffusion layer 5 and are removed from it. Furthermore, electrons 25 are conducted through the bipolar plates 3 .
- FIG. 2 shows a fuel cell stack 1 according to the invention.
- a coating 9 which is electrically conductive and comprises a coating material 13 .
- electrically conductive means an electrical conductivity that is greater than 100 S/m.
- the coating 9 is in each case arranged between a gas diffusion layer 5 and a bipolar plate 3 and connects them to one another in a materially bonded and form-fitting manner. Furthermore, the coating 9 is arranged locally on the webs 11 of the bipolar plates 3 .
- FIG. 3 shows a bipolar plate 3 in a plan view and a section of the bipolar plate 3 in a perspective view. Hydrogen 19 and air 21 are supplied, and unused hydrogen 19 and unused air 21 are discharged. In addition, a cooling medium 27 is conducted through the bipolar plate 3 . Furthermore, a schematic representation of a section of the center of the bipolar plate 3 is shown, on which the webs 11 of the bipolar plate 3 can be seen. The coating 9 is arranged on a web 11 shown.
- FIG. 4 shows the section of the bipolar plate 3 according to FIG. 3 in a cross-sectional view.
- the wavy profile of the bipolar plate 3 with the webs 11 becomes clear.
- FIG. 5 shows a detail of a cross-sectional view of a bipolar plate 3.
- the bipolar plate 3 has webs 11 and valleys 29.
- the webs 11 have a web width 31 and are at a distance 33 from one another.
- a contact width 35 is present on the webs 11 .
- the valleys 29 have a depth 37 and a valley width 39.
- FIG. 6 shows a schematic representation of a method for producing a fuel cell stack 1.
- Two gas diffusion layers 5 are partially provided with a coating 9.
- a bipolar plate 3 with a seal 41 is arranged between the gas diffusion layers 5, which have the coating 9, and is materially connected to the gas diffusion layers 5 by the coating 9.
- a bipolar plate 3 that already has a seal 41 can be partially provided with the coating 9 .
- two gas diffusion layers 5 can be arranged on either side of the bipolar plate 3 .
- a membrane 7 with a gasket 43 is placed on the gas diffusion layers 5 .
- Several bipolar plates 3 with gas diffusion layers 5 and membranes 7 are stacked to form the fuel cell stack 1 .
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202180094004.9A CN116868383A (zh) | 2020-12-17 | 2021-12-16 | 燃料电池堆叠及其制造方法 |
US18/257,952 US20240055621A1 (en) | 2020-12-17 | 2021-12-16 | Fuel cell stack and production method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020216104.6 | 2020-12-17 | ||
DE102020216104.6A DE102020216104A1 (de) | 2020-12-17 | 2020-12-17 | Brennstoffzellenstapel und Verfahren zur Herstellung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022129279A1 true WO2022129279A1 (de) | 2022-06-23 |
Family
ID=79317021
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/086089 WO2022129279A1 (de) | 2020-12-17 | 2021-12-16 | Brennstoffzellenstapel und verfahren zur herstellung |
Country Status (4)
Country | Link |
---|---|
US (1) | US20240055621A1 (de) |
CN (1) | CN116868383A (de) |
DE (1) | DE102020216104A1 (de) |
WO (1) | WO2022129279A1 (de) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10224452C1 (de) | 2002-05-29 | 2003-11-20 | Fraunhofer Ges Forschung | Protonenleitende Polymermembran sowie Verfahren zu deren Herstellung |
DE10235598A1 (de) * | 2002-07-31 | 2004-02-19 | Reinz-Dichtungs-Gmbh & Co. Kg | Bauteil sowie Verfahren zur Beschichtung desselben |
US20070298267A1 (en) * | 2006-06-27 | 2007-12-27 | Feng Zhong | Adhesion of polymeric coatings to bipolar plate surfaces using silane coupling agents |
DE112005002974B4 (de) | 2004-12-13 | 2010-03-04 | General Motors Corp., Detroit | Verfahren zum Erhöhen der Klebkraft zwischen mittels eines Klebstoffs zu verbindenden Elementen einer Brennstoffzellen-Membranelektrodenanordnung |
DE102016200802A1 (de) * | 2016-01-21 | 2017-07-27 | Volkswagen Ag | Flusskörper-Gasdiffusionsschicht-Einheit für eine Brennstoffzelle, Brennstoffzellenstapel, Brennstoffzellensystem und Kraftfahrzeug |
WO2019175014A1 (de) * | 2018-03-14 | 2019-09-19 | Robert Bosch Gmbh | Elektrochemischer energiewandler mit reduziertem übergangswiderstand |
DE102019218380A1 (de) * | 2019-11-27 | 2021-05-27 | Robert Bosch Gmbh | Brennstoffzellenanordnung und Verfahren zur Herstellung einer Brennstoffzellenanordnung |
DE102020202086A1 (de) * | 2020-02-19 | 2021-08-19 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren zum Aufbringen einer Dichtung auf eine Bipolarplatte |
-
2020
- 2020-12-17 DE DE102020216104.6A patent/DE102020216104A1/de active Pending
-
2021
- 2021-12-16 WO PCT/EP2021/086089 patent/WO2022129279A1/de active Application Filing
- 2021-12-16 US US18/257,952 patent/US20240055621A1/en active Pending
- 2021-12-16 CN CN202180094004.9A patent/CN116868383A/zh active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10224452C1 (de) | 2002-05-29 | 2003-11-20 | Fraunhofer Ges Forschung | Protonenleitende Polymermembran sowie Verfahren zu deren Herstellung |
DE10235598A1 (de) * | 2002-07-31 | 2004-02-19 | Reinz-Dichtungs-Gmbh & Co. Kg | Bauteil sowie Verfahren zur Beschichtung desselben |
DE112005002974B4 (de) | 2004-12-13 | 2010-03-04 | General Motors Corp., Detroit | Verfahren zum Erhöhen der Klebkraft zwischen mittels eines Klebstoffs zu verbindenden Elementen einer Brennstoffzellen-Membranelektrodenanordnung |
US20070298267A1 (en) * | 2006-06-27 | 2007-12-27 | Feng Zhong | Adhesion of polymeric coatings to bipolar plate surfaces using silane coupling agents |
DE102016200802A1 (de) * | 2016-01-21 | 2017-07-27 | Volkswagen Ag | Flusskörper-Gasdiffusionsschicht-Einheit für eine Brennstoffzelle, Brennstoffzellenstapel, Brennstoffzellensystem und Kraftfahrzeug |
WO2019175014A1 (de) * | 2018-03-14 | 2019-09-19 | Robert Bosch Gmbh | Elektrochemischer energiewandler mit reduziertem übergangswiderstand |
DE102019218380A1 (de) * | 2019-11-27 | 2021-05-27 | Robert Bosch Gmbh | Brennstoffzellenanordnung und Verfahren zur Herstellung einer Brennstoffzellenanordnung |
DE102020202086A1 (de) * | 2020-02-19 | 2021-08-19 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren zum Aufbringen einer Dichtung auf eine Bipolarplatte |
Non-Patent Citations (2)
Title |
---|
MASON ET AL.: "Effect of Clamping Pressure on Ohmic Resistance and Compression of Gas Diffusion Layers for Polymer Electrolyte Fuel Cells", JOURNAL OF POWER SOURCES, vol. 219, 2012, pages 52 - 59 |
NIKOLOV K ET AL: "High-efficient surface modification of thin austenitic stainless steel sheets applying short-time plasma nitriding by means of strip hollow cathode method for plasma thermochemical treatment", VACUUM, PERGAMON PRESS, GB, vol. 110, 16 September 2014 (2014-09-16), pages 106 - 113, XP029088836, ISSN: 0042-207X, DOI: 10.1016/J.VACUUM.2014.09.002 * |
Also Published As
Publication number | Publication date |
---|---|
CN116868383A (zh) | 2023-10-10 |
US20240055621A1 (en) | 2024-02-15 |
DE102020216104A1 (de) | 2022-06-23 |
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