EP4165704A1 - Ensemble membrane-électrode pour une pile à combustible - Google Patents

Ensemble membrane-électrode pour une pile à combustible

Info

Publication number
EP4165704A1
EP4165704A1 EP21725728.6A EP21725728A EP4165704A1 EP 4165704 A1 EP4165704 A1 EP 4165704A1 EP 21725728 A EP21725728 A EP 21725728A EP 4165704 A1 EP4165704 A1 EP 4165704A1
Authority
EP
European Patent Office
Prior art keywords
membrane
layer
material layer
open
approx
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP21725728.6A
Other languages
German (de)
English (en)
Inventor
Ulrich Berner
Thilo Lehre
Andreas Gehrold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP4165704A1 publication Critical patent/EP4165704A1/fr
Pending legal-status Critical Current

Links

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
    • H01M8/023—Porous and characterised by the material
    • H01M8/0241—Composites
    • H01M8/0245—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
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/023—Porous and characterised by the material
    • H01M8/0234—Carbonaceous material
    • 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
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M2008/1095—Fuel cells with polymeric electrolytes
    • 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

Definitions

  • the invention relates to a membrane electrode gas diffusion layer arrangement, hereinafter referred to as a membrane electrode arrangement, for an electrochemical cell, in particular a fuel cell.
  • the invention also relates to a fuel cell, a fuel cell unit and a fuel cell system, preferably for a fuel cell vehicle.
  • a fuel cell system for example a fuel cell vehicle
  • the fuel cell comprises at least one membrane-electrode arrangement, which has a layer structure of an ion- or proton-conducting membrane and catalytic electrodes provided on both sides of the membrane (membrane-electrode unit with anode and cathode electrode as reactive layers) and gas diffusion layers .
  • the fuel cell is designed with a large number of membrane electrode assemblies arranged in a stack (fuel cell stack) and bipolar plates arranged between them.
  • EP 2 834870 B1 discloses a membrane electrode arrangement for such a fuel cell, with a microporous particle body provided on a surface of a catalytic electrode of a membrane electrode unit. Furthermore, a coarse-pored metal mesh is provided on the particle body, where in these two bodies together a single gas diffusion layer of the mem- Form bran-electrode arrangement. Furthermore, the particle body has comparatively large particle sizes at those sections that are in mechanical contact with Festphasenab sections of the metal mesh and comparatively small particle sizes at those sections that face the gas phase sections of the metal mesh.
  • the object of the invention is by means of a membrane-electrode arrangement for an electrochemical cell, in particular a fuel cell; and solved by means of a fuel cell, a fuel cell unit and a fuel cell system, preferably for a fuel cell vehicle.
  • the membrane-electrode arrangement comprises a membrane, at least one catalytic electrode provided on the membrane and a flat gas diffusion layer provided on the catalytic electrode, the gas diffusion layer being at least partially constituted as a (micro) porous composite layer , and the (micro) porous composite layer has a microporous particle layer extending in the area of the gas diffusion layer, in which at least some sections an open-pore, in particular me-metallic, material layer is embedded.
  • the open-pore material layer can of course also be designed as an open-microporous material layer.
  • the membrane-electrode arrangement comprises only or at least the membrane, which has at least one catalytic electrode provided on the membrane, that is to say an at least partially configured membrane-electrode assembly. that is, and the at least one gas diffusion layer.
  • the membrane-electrode arrangement preferably has essentially no other components, such as B. a bipolar plate or a section thereof, but can optionally include such a component.
  • the microporous particle layer and the open-pore material layer differ at least in their thermal and / or electrical conductivity, both preferably made of different materials (e.g. differently structured material than two materials), in particular different materials (material: present in a uniform form Matter with certain properties) are built up.
  • the optional “metallic” property of the open-pore material layer is intended to make it clear that the material layer can have at least one property of a metal; this relates in particular to a thermal and / or electrical conductivity, which should be in a range of a metal or above (see below. Graphs).
  • At least one gas diffusion layer of a membrane-electrode arrangement of the single cell has the porous composite layer or the open-pore material layer embedded in the microporous particle layer.
  • the membrane-electrode arrangement can be coated with a catalytic electrode on one side (anode or cathode side) or on both sides (anode and cathode side), and there on a single of one or two catalytic electrodes a single gas diffusion layer or on both catalytic electrodes each have a (single) gas diffusion layer.
  • the porous composite layer according to the invention can be either in / on the anode / anode electrode or cathode / cathode electrode or in / on the anode / anode electrode and cathode / cathode electrode of a single cell concerned.
  • At least one gas diffusion layer of the possibly two gas diffusion layers has the porous composite layer according to the invention, which at least partially or essentially completely constitutes the gas diffusion layer. If only on a single (large-area) side of the membrane-electrode assembly a porous composite layer is set up, can on the opposite side z. B. a conventional gas diffusion layer can be set up.
  • the porous composite layer according to the invention can be referred to as a microporous composite particle layer (composite MPL, see below).
  • the open-pore material layer can have a better thermal and / or electrical conductivity than the microporous particle layer in plane direction and / or thickness direction of the membrane-electrode arrangement.
  • the microporous particle layer can be designed as a microporous particle layer which is free-standing on one side and which at least in sections forms an outside of the membrane-electrode arrangement.
  • the porous composite layer can be designed as a porous composite layer free-standing on one side, which at least in sections forms an outside of the membrane-electrode arrangement.
  • the microporous particle layer, the porous composite layer or the gas diffusion layer, which is essentially completely constituted by the porous composite layer is in fluid contact with a respective operating medium and the operating medium in an installed state of the membrane-electrode arrangement in a fuel cell in an anode or cathode compartment channeling around a relevant bipolar plate.
  • Exactly one or two, at least one or two, or a multiplicity of open-pore material layers can be embedded within the microporous particle layer.
  • the / an open-pore material layer can be closer, equally close or less close to an outside of the microporous particle layer than to a relevant catalytic electrode or the membrane.
  • the open-pore material layer can be placed freely within an overall layer thickness of the microporous particle layer, can itself consist of one or more layers and, if necessary, be homogeneously and / or inhomogeneously distributed in one plane.
  • the microporous particle layer and its open-pore material layer can form a sandwich-like arrangement, the open-pore material layer being seen essentially between layers of the microporous particle layer.
  • Heat sources that can arise from a membrane-electrode unit of the membrane-electrode arrangement can be partially neutralized as heat flows when passing through the porous composite layer by means of the porous composite layer.
  • heat sources so-called “hotspots”
  • These heat sources spread, starting from the membrane-electrode unit of a respective membrane-electrode arrangement, into a relevant porous composite layer and there are propagated as heat flows in the direction of a relevant bipolar plate, with which a single cell is cooled.
  • the heat flows that are spaced apart from one another in the porous composite layer and propagate in the direction of the bipolar plate are forced to fan out, spread out, etc. when passing through the porous composite layer in the thickness direction due to the properties of the open-pore material layer. in particular through their open-pore material layer, in this heat sources entering as heat flows with heat sinks originating from the relevant bipolar plate in part.
  • a total surface heat flow that can be transported away from the membrane-electrode unit of the membrane-electrode arrangement can be homogenized in the open-pore material layer.
  • the porous composite layer can be designed such that a global central plane of the open-pore material layer is embedded precisely within the microporous particle layer (cf. FIGS. 4 and 5, both of which show such material layers within the particle layer).
  • the global center plane of the open-pore material layer can be embedded in the microporous particle layer essentially parallel to an outside of the porous composite layer.
  • Fermer can have a ratio of an optionally average thickness of the porous composite layer or microporous particle layer to the open-pore material layer in an average of approx. 2: 1, approx. 2.5: 1, approx. 3: 1, approx. 3.5: 1, approx. 4: 1, approx. 5: 1, approx. 7.5: 1 or approx. 10: 1.
  • a thickness of the open-pore material layer can be essentially constant or, e.g. B. periodically, vary.
  • the open-pore material layer itself can be essentially plate-shaped, plate-shaped and / or leaf-shaped (cf. FIG. 4).
  • a discontinuity point, step, etc. can be set up in the open-pore material layer.
  • the open-pore material layer can be designed as a corrugated material layer (cf. FIG. 6 o.), Trapezoidal material layer (cf. FIG. 6 u.), Ribbed material layer.
  • the open-pore material layer can be miniaturized and analogous to a corrugated sheet, e.g. B. with a sinusoidal profile; Trapezoidal sheet; Cooling plate, etc. be formed.
  • the open-pore material layer itself can be designed as a simple homogeneous or inhomogeneous material layer.
  • the porous material layer itself can be designed as a coherent and / or loosely fragmented material layer.
  • the openly porous material layer is made up of a large number of interconnected constituents (fragments), whereas in the second case these fragments are not connected to one another via material structures of the open-porous material layer.
  • sections of the open-pore material layer can be closer to heat sources that arise from the membrane-electrode unit than sections of the open-pore material layer directly adjacent to these sections (cf. FIG. 6). Furthermore, sections of the open-pore material layer can lie closer to the membrane-electrode arrangement that can be produced than sections of the open-pore material layer that are directly adjacent to these sections (cf. FIG. 6). Within the open-pore material layer, sections that are adjacent to heat sources can continuously transfer into sections of the open-pore material layer that are adjacent to heat sinks.
  • the open-pore material layer can have free, loose and / or connected long fibers, fibers, short fibers and / or particles.
  • the open-pore material layer can be designed as a fabric, expanded metal, flow, at least one paper-like layer and / or a foam.
  • the open-pore material layer can comprise a metal and / or semimetal, and preferably not comprise a typical non-ferrous metal.
  • a preferred metal is e.g. B. an iron alloy, in particular a steel, preferably a stainless steel; titanium etc.
  • the open-pore material layer can comprise a non-metal and preferably no ceramic or oxidic fibers.
  • a preferred semi-metal or non-metal includes e.g. B. on carbon based particles or fibers.
  • a graphene-like material e.g. B. with an inplane thermal conductivity of greater than 1,000W / m-K, applicable; these include B. a (multi-layer) graph, (multi-wall) carbon nanotubes, etc. -
  • the material or the materials of the open-pore material layer can be coated in order to z. B. to produce a hydrophilic or hydrophobic property.
  • the coating can be homogeneous, vary locally and be (full) surface and / or uninterrupted, etc.
  • the membrane can be used as a cation-selective polymer electrolyte membrane, in particular sondere an ionomer membrane, preferably a Nafion ® membrane, may be formed.
  • the / a membrane-electrode unit can be designed as a membrane coated with catalytic electrodes (CCM: Catalyst Coated Membrane).
  • CCM Catalyst Coated Membrane
  • the essentially entire gas diffusion layer can be designed as the porous composite layer. I. E. the gas diffusion layer as a porous composite layer has no further essential layer, no further essential component, etc.
  • the gas diffusion layer can comprise at least one second layer in addition to the porous composite layer.
  • the gas diffusion layer can include at least one more essential layer, another essential component, etc., z. B. a conventional layer.
  • the membrane-electrode arrangement can comprise at least or precisely one bipolar plate.
  • a feature can be positive, ie present, or negative, ie absent.
  • a negative feature is not explicitly explained as a feature unless, according to the invention, value is attached to the fact that it is absent. I. E. the one actually made and it is not an invention constructed by the prior art to omit that feature.
  • the absence of a feature (negative feature) in one embodiment shows that the feature is optional. - In the only exemplary and schematic figures (Fig.) Of the drawing show:
  • FIG. 1 shows an embodiment of a in a simplified block diagram
  • Fig. 2 in a 2D sectional view a cut away on four sides of a single fuel cell of a fuel cell according to the prior art
  • FIG. 3 shows a view analogous to FIG. 2, with a microporous particle layer (above) and a microporous particle layer as well as a carbon fiber fleece (below) as gas diffusion layers according to the prior art,
  • Fig. 4 is a 2D sectional view of a cut away on four sides of a single fuel cell of a fuel cell, with a first Ausuge approximate form of a gas diffusion layer according to the invention
  • Fig. 5 is an illustration similar to Fig. 3, with a composite layer as a gas diffusion layer according to the invention (top), and a microporous particle layer and a carbon fiber fleece as a gas diffusion layer according to the prior art (bottom), and
  • FIG. 6 shows a view analogous to FIG. 4, in which two further embodiments of the gas diffusion layers according to the invention are shown as composite layers.
  • the invention is based on exemplary embodiments of a membrane electrode assembly 105 for an electrochemical cell, in particular a fuel cell 10 of a fuel cell unit 1 for a low-temperature polymer electrolyte fuel cell system of a fuel cell vehicle, ie a motor vehicle having a fuel cell or a fuel cell system explained.
  • a fuel cell 10 of a fuel cell unit 1 for a low-temperature polymer electrolyte fuel cell system of a fuel cell vehicle ie a motor vehicle having a fuel cell or a fuel cell system explained.
  • a fuel cell 10 of a fuel cell unit 1 for a low-temperature polymer electrolyte fuel cell system of a fuel cell vehicle ie a motor vehicle having a fuel cell or a fuel cell system
  • the invention is described and illustrated in detail by preferred exemplary embodiments, the invention is not restricted by the disclosed exemplary embodiments. Other variations can be derived from this without departing from the scope of protection of the invention.
  • the invention can be applied to an electrochemical cell.
  • FIG. 1 shows the fuel cell unit 1 according to a preferred embodiment, with at least one, in particular a plurality of individual fuel cells 100 (individual cells 100) bundled to form a fuel cell stack 10, also referred to as fuel cell 10, which are in a preferably fluid-tight stack housing 16 are housed.
  • Each individual cell 100 comprises an anode space 12 with a gas diffusion layer 120 (the fuel cell 10), and a cathode space 13 with a gas diffusion layer 130 (the fuel cell 10), which is supported by a membrane-electrode unit 101 (MEA: Membrane Electrode Assembly) are spatially and electrically separated from each other (see detailed section).
  • MEA Membrane Electrode Assembly
  • the membrane-electrode unit 101 (without gas diffusion layer (s) 120, 130) is preferably designed as a membrane 110 (CCM: Catalyst Coated Membrane) coated with catalytic electrodes 112, 113, the membrane-electrode unit 101 with the gas diffusion layer (s) 120, 130 is referred to as a membrane-electrode arrangement 105.
  • CCM Catalyst Coated Membrane
  • a bipolar plate 140 is arranged between two directly adjacent membrane electrode arrangements 105, which serves to supply operating media 3, 5 into an anode compartment 12 of a first individual cell 100 and a cathode compartment 13 of a second individual cell 100 directly adjacent to it and above In addition, an electrically conductive connection between these single cells 100 is realized.
  • the fuel cell unit 1 has an anode supply 20 and a cathode supply 30.
  • the anode supply 20 comprises in particular: a fuel store 23 for the anode operating medium 3 (flowing towards); an anode supply path 21 with an ejector 24; an anode exhaust gas path 22 for an anode exhaust gas 4 (flowing out, mostly into the environment 2); preferably a fuel recirculation line 25 with a fluid delivery device 26 located therein and possibly a water separator.
  • the cathode supply 30 comprises in particular: a cathode supply path 31 for the cathode operating medium 5 (flowing towards, mostly from the environment 2), with preferably a fluid delivery device 33; a cathode exhaust gas path 32 for a cathode exhaust gas 6 (flowing out, mostly into the environment 2) with preferably a turbine 34, possibly that of an exhaust gas turbocharger; preferably a moisture transmitter 36; possibly a wastegate 35 between the cathode supply path 31 and the cathode exhaust gas path 22; and possibly a water separator.
  • the fuel cell unit 1 also includes, in particular, a cooling medium supply 40, through which the fuel cell 10 can be incorporated, preferably by means of its bipolar plates 140, into a cooling circuit to transfer heat to the temperature.
  • the cooling medium supply 40 comprises a cooling medium inflow path 41 and a cooling medium outflow path 42.
  • the cooling medium 7 (flowing in), 8 (flowing out) circulating in the cooling medium supply 40 is preferably conveyed by means of at least one cooling medium conveying device 43.
  • the fuel cell system includes in addition to the fuel cell unit 1 peripheral system components such. B. a control unit which can be egg Nes of the fuel cell vehicle.
  • Fig. 2 shows a single cell 100 according to the prior art, having the central, three-layer membrane-electrode unit 101 (membrane 110 with catalytic anode 112 and cathode electrode 113).
  • a gas diffusion layer 120, 130 is arranged on the respective electrode 112, 113 and is covered by a bipolar plate 140 opposite the membrane-electrode unit 101.
  • Anode or cathode channels for the operating medium 3/5 (operating medium channels) in the respective bipolar plate 140, the respective gas diffusion layer 120/130 and the respective anode 112 or cathode electrode 113 form an anode 102 or cathode 103 of the single cell 100
  • Anode or cathode channels in the respective bipolar plate 140 and a space for the relevant Gas diffusion layers 120/130 each form an anode 12 or cathode space 13 of the individual cell 100.
  • a gas diffusion layer 120, 130 has various tasks within the fuel cell 10 or the individual cell 100. These include a material transport (anode or cathode operating medium 3, 5; anode or cathode exhaust gas 4, 6; water; etc.), a conduction of heat, a conduction of electrical current and / or a mechanical-static force distribution.
  • a material transport anode or cathode operating medium 3, 5; anode or cathode exhaust gas 4, 6; water; etc.
  • conduction of heat a conduction of electrical current and / or a mechanical-static force distribution.
  • the gas diffusion layer 130, 120 each channel side, so facing the anode and cathode channels, a carbon fiber fleece 134, 124 (GDB: gas diffusion backing) and on the catalyst side, ie facing the catalytic cathode 113 or anode electrode 112, a microporous particle layer 135, 125 (MPL: Micro-Porous Layer).
  • a carbon fiber fleece 134/124 (see. Fig. 3, only the lower half without the mikroporö se particle layer 135/125) conducts heat and electricity well along its planes (plane direction E) and poorly through the planes (thickness direction D); so it has anisotropic thermal and electrical conductivity.
  • a freestanding, d. H. with the anode or cathode compartment 12, 13 in direct fluid contact with the microporous particle layer 125/135 (see. Fig. 3, only the upper half), has a quasi isotropic, but poor thermal and electrical conductivity. - The total compared to In the case of a carbon fiber fleece 124, 134, poor conductivities typically lead to poor heat dissipation from an individual cell 100 in the case of a free-standing microporous particle layer 125, 135.
  • microporous particle layer 125/135 in those areas with which it is in mechanical contact with the bipolar plates 140, strong temperature gradients, so-called 'cold spots' (influence of the cooling medium 7), on which undesired condensation of water are possible, are found is what can lead to mass transport losses in the microporous particle layer 125/135.
  • the temperature distribution in Fig. 3 and (microporous particle layer 135/125 and carbon fiber fleece 134/124) is significantly more homogeneous on both the membrane-electrode unit 101 and the channel / web side of the bipolar plate 140 than in FIG free-standing microporous particle layer 125/135.
  • the free-standing microporous particle layer 125/135 i.e. o. in FIG Fig. 3. This is due to the fact that in the conventional gas diffusion layer sandwich of the microporous particle layer 135/125 and the carbon fiber fleece 134/124 a fiber structure of the carbon fiber fleece 134/124 makes a major contribution to the thermal conductivity in the plane, this depending on the free-standing one microporous particle layer 125/135 is absent.
  • an, possibly multiple, gas diffusion layer sandwich of at least one in a microporous particle layer 122/132 at least partially embedded open-pore, in particular metallic, material layer 123/133 is taught; a so-called porous composite sheet according to the invention ge 120/130 as a layer of the membrane electrode assembly 105 according to the invention.
  • This porous composite layer 120/130 as a component of or as an entire gas diffusion layer 120/130 is explained in detail, which is why in the following only the examples in the Fig. 4 to 6 has been discussed in more detail.
  • FIG. 4 shows in a membrane-electrode arrangement 105 of a fuel cell 100 a combination of a porous composite layer 120 according to the invention /
  • the porous composite layer 120/130 according to the invention (FIG. 4 o.) Comprises a single open-pore material layer 123/133 which is closer to an outside of the (single) microporous particle layer 122/132 in which it is embedded than to one concern the catalytic electrode 112/113.
  • the gas diffusion layer 130/120 according to the prior art (Fig. 4 and.) Comprises, analogously to Fig. 3, a single microporous se particle layer 135/125 directly adjacent to the relevant catalytic electrode 113/114 and arranged thereon a carbon fiber fleece 134 / 124.
  • FIGS. 3 and 5 show identically designed and constructed sections of membrane electrode assemblies 105 with the same simulated output of the fuel cell 100.
  • the deviations of Fig. 5 and. 3 u., ie the improvements in heat distribution apart from the invention (Fig. 5 o.) in the area of the conventional gas diffusion layer 130/120 (Fig. 5 u.) is due to a thermal influence of the inventive po- red composite layer 120/130 (Fig. 5 o.).
  • a further improvement in the heat distribution can be expected.
  • FIG. 6 shows two further exemplary embodiments of the invention.
  • Fig. 6 o In contrast to Fig. 5 o., Which teaches a flat and plate-shaped te, open-pore material layer 123/133 - a corrugated material layer 123/133 (analogous to a corrugated sheet).
  • the z. B. sinusoidally corrugated open-pore material layer 123/133 is in sections closer to the membrane electrode unit 101 and in sections closer to the relevant bipolar plate 140.
  • Those sections with which the corrugated open-pore material layer 123/133 is closer to the membrane Electrode unit 101 is, are preferably the operating medium channels of the relevant bipolar plate 140 in the direction of thickness D substantially directly opposite.
  • the corrugated, open-pore material layer 123/133 can be in direct mechanical contact with the relevant bipolar plate 140 and / or the relevant electrode 112/113.
  • FIG. 6 also shows an open-pore trapezoidal material layer 133/123 (analogous to a trapezoidal sheet metal), which, analogously to FIG extends towards the relevant bipolar plate 140.
  • the trapezoidal material layer 133/123 is designed as a loosely fragmented open-pore material layer 133/123 in contrast to FIGS. 5 and 6, which each show a coherent, homogeneous, open-pore material layer 123/133 .

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Fuel Cell (AREA)
  • Inert Electrodes (AREA)

Abstract

L'invention concerne un ensemble membrane-électrode (105) pour une cellule électrochimique, plus particulièrement une pile à combustible (10) d'une unité de pile à combustible (1) de préférence pour un véhicule à pile à combustible, comprenant une membrane (110), au moins une électrode catalytique (112, 113) qui est disposée sur la membrane (110), et une couche de diffusion de gaz (120, 130) qui est disposée sur l'électrode catalytique (112, 113) et qui s'étend de manière plane, la couche de diffusion de gaz (120/130) étant au moins partiellement constituée en tant que couche composite poreuse (120/130), et la couche composite poreuse (120/130) comportant une couche de particules microporeuse (122/132) dans laquelle une couche de matériau (123/133) à pores ouverts, plus particulièrement métallique, est incorporée au moins par sections.
EP21725728.6A 2020-06-12 2021-05-10 Ensemble membrane-électrode pour une pile à combustible Pending EP4165704A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020207333.3A DE102020207333A1 (de) 2020-06-12 2020-06-12 Membran-Elektroden-Anordnung für eine Brennstoffzelle
PCT/EP2021/062319 WO2021249710A1 (fr) 2020-06-12 2021-05-10 Ensemble membrane-électrode pour une pile à combustible

Publications (1)

Publication Number Publication Date
EP4165704A1 true EP4165704A1 (fr) 2023-04-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21725728.6A Pending EP4165704A1 (fr) 2020-06-12 2021-05-10 Ensemble membrane-électrode pour une pile à combustible

Country Status (4)

Country Link
EP (1) EP4165704A1 (fr)
CN (1) CN116018702A (fr)
DE (1) DE102020207333A1 (fr)
WO (1) WO2021249710A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080206615A1 (en) * 2007-02-22 2008-08-28 Paul Nicotera Gas diffusion layer with controlled diffusivity over active area
US8304145B2 (en) * 2010-02-19 2012-11-06 GM Global Technology Operations LLC High tortuosity diffusion medium
JP5924530B2 (ja) * 2011-06-17 2016-05-25 日産自動車株式会社 燃料電池用ガス拡散層
JP6028809B2 (ja) 2012-04-04 2016-11-24 日産自動車株式会社 膜電極接合体、燃料電池、燃料電池スタック、及び膜電極接合体の製造方法
WO2017110690A1 (fr) * 2015-12-24 2017-06-29 東レ株式会社 Électrode à diffusion gazeuse
CA3038024A1 (fr) * 2016-09-29 2018-04-05 Toray Industries, Inc. Electrode de diffusion de gaz et pile a combustible

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DE102020207333A1 (de) 2021-12-16
CN116018702A (zh) 2023-04-25
WO2021249710A1 (fr) 2021-12-16

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