CN110690472B - Composite bipolar plate and preparation method and application thereof - Google Patents

Composite bipolar plate and preparation method and application thereof Download PDF

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Publication number
CN110690472B
CN110690472B CN201910891769.XA CN201910891769A CN110690472B CN 110690472 B CN110690472 B CN 110690472B CN 201910891769 A CN201910891769 A CN 201910891769A CN 110690472 B CN110690472 B CN 110690472B
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layer
carbon fiber
graphite
nodes
plate
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CN110690472A (en
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韩建
崔龙
倪大龙
米新艳
张克金
张苡铭
苏中辉
曲英雪
付中博
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FAW Jiefang Automotive Co Ltd
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FAW Jiefang Automotive Co Ltd
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    • 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
    • H01M8/0213—Gas-impermeable carbon-containing materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
    • B32B9/007—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile comprising carbon, e.g. graphite, composite carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/047—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material made of fibres or filaments
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/42—Alternating layers, e.g. ABAB(C), AABBAABB(C)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/202—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/302—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/10—Batteries
    • 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

Abstract

The invention provides a composite bipolar plate and a preparation method and application thereof, wherein the composite bipolar plate comprises an anode plate layer and a cathode plate layer which are connected together, the anode plate and the cathode plate respectively comprise graphite layers and carbon fiber net layers with nodes which are alternately arranged, and the graphite layers are arranged on two sides of the carbon fiber net layers with the nodes; the graphite layers and the carbon fiber net layers with the nodes are alternately arranged on the anode plate layer and the cathode plate layer, so that the obtained composite bipolar plate has better flexibility, mechanical strength, electrical conductivity and thermal conductivity, and can effectively reduce the internal resistance of a fuel cell when being used for the fuel cell, thereby improving the cell performance and the discharge efficiency.

Description

Composite bipolar plate and preparation method and application thereof
Technical Field
The invention belongs to the field of fuel cells, and relates to a composite bipolar plate and a preparation method and application thereof.
Background
A fuel cell is a power generation device that directly and continuously converts chemical energy in a fuel and an oxidant into electrical energy. As a novel chemical energy, the energy is known as a fourth generation power generation technology following hydroelectric power generation, thermal power generation and nuclear power. The fuel cell has high energy conversion efficiency (40-60 percent), is environment-friendly, and only has water as emission. The proton exchange membrane fuel cell is composed of a plurality of single cells, and each single cell is composed of a membrane electrode, a diffusion layer and a bipolar plate. The bipolar plate is an important component of the PEMFC, and functions to separate gases and introduce fuel reaction gases into the fuel cell through a flow field, collect and conduct current and support the membrane electrode, while also performing a heat dissipation function of the entire cell system. The cost and weight of the bipolar plate account for 45% and 80% of PEMFCs, respectively, and the high cost thereof causes the PEMFCs to be expensive.
The bipolar plate at present is mainly researched by three categories, namely a metal plate, a pure graphite plate and a composite plate. The metal bipolar plate has good electric and thermal conductivity, the air leakage problem can not occur, the gas flow channel can be formed by punching, and the mass production is easy to realize. However, the surface of the metal bipolar plate needs to be specially treated to improve the chemical stability, otherwise, the oxide film on the surface of the metal bipolar plate is thickened, the contact resistance is increased, and the battery performance is reduced.
The pure graphite plate has good electrical conductivity, thermal conductivity and chemical stability, and the flow channel is generally processed by the pure graphite plate by adopting a traditional machining method, so that the processing process is long in time consumption and the production efficiency is not high; and the pure graphite plates are brittle, the internal pores are easy to cause gas leakage, and a certain thickness must be kept to ensure the gas tightness, so that the improvement of the volume ratio power and the weight ratio power of the pile is restricted.
The graphite-based composite bipolar plate has the same corrosion resistance as graphite and excellent electrical conductivity and thermal conductivity, and the bipolar plate made of the material can be formed by a die pressing process, and a flow field can be formed at one time, so that the graphite-based composite bipolar plate is easy to form at one time, is suitable for large-scale production, and can reduce the production cost of the bipolar plate.
Application No. 201310043424.1 discloses a process for manufacturing a bipolar plate for a fuel cell, which uses expanded graphite as a carbon-based material and resin powder as a binder, and adds carbon black in the preparation of the composite material, and small carbon black particles help to form conductive paths between the graphite particles, and by increasing the electrical conductivity, the incorporation of carbon fibers into the composite bipolar plate results in good bending strength, but the electrical conductivity and bending strength thereof remain to be improved.
The patent with the application number of 200910072406.X discloses an expanded graphite/phenolic resin composite material bipolar plate and a preparation method thereof, and relates to a bipolar plate and a preparation method thereof. The invention solves the problems of poor conductivity and mechanical property of the bipolar plate of the proton exchange membrane fuel cell. The bipolar plate is prepared from expanded graphite, thermoplastic phenolic resin and hexamethylenetetramine, and the method comprises the following steps: mixing the expanded graphite with the aqueous solution of the thermoplastic phenolic resin, filtering, drying filter residues, ball-milling and mixing with hexamethylenetetramine, adding into a mold for mold pressing, reducing pressure, raising temperature, keeping the temperature for mold pressing, and demolding to obtain the expanded graphite/phenolic resin composite material bipolar plate, wherein the bending strength of the bipolar plate is still to be improved.
The patent with the application number of 201610741160.0 discloses a hot-pressed graphite bipolar plate and a manufacturing process thereof, and the specific method comprises the steps of selecting graphite powder, phenolic resin, carbon black and carbon fiber according to the weight percentage, putting the graphite powder and the phenolic resin into a kneading pot with the temperature of 140-. But the preparation process conditions are complicated.
Therefore, it is necessary to develop a composite bipolar plate having high electrical conductivity and high bending strength.
Disclosure of Invention
The invention aims to provide a composite bipolar plate and a preparation method and application thereof, wherein graphite layers and carbon fiber net layers with nodes are alternately arranged on an anode plate layer and a cathode plate layer, so that the obtained composite bipolar plate has better flexibility, mechanical strength, electrical conductivity and thermal conductivity, and can effectively reduce the internal resistance of a fuel cell when used in the fuel cell, thereby improving the cell performance and the discharge efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention aims to provide a composite bipolar plate which comprises an anode plate layer and a cathode plate layer which are connected together, wherein the anode plate and the cathode plate respectively comprise graphite layers and carbon fiber net layers with nodes which are alternately arranged, and the graphite layers are arranged on two sides of the carbon fiber net layers with the nodes.
In the invention, the anode plate layer and the cathode plate layer in the composite bipolar plate both comprise the graphite layers and the carbon fiber net layers with nodes which are alternately arranged, so that the obtained composite bipolar plate layer has better flexibility, mechanical strength, electrical conductivity and thermal conductivity, and can effectively reduce the internal resistance of the fuel cell when being used in the fuel cell, thereby improving the performance and the discharge efficiency of the cell. The graphite layer is used for forming a flow channel for flowing of reaction gas and conduction of electrons, and the graphite layer can be better combined together through the carbon fiber net layer with the nodes, so that the breaking strength and the conductivity of the composite plate are improved.
In the invention, the anode plate layer comprises a carbon fiber net layer with nodes and graphite layers arranged on two sides of the carbon fiber net layer with nodes.
In the invention, the anode plate layer comprises a graphite layer, and a carbon fiber net layer and a graphite layer which are positioned on two sides of the graphite layer and provided with nodes in sequence.
In the present invention, the cathode sheet layer includes a carbon fiber mesh layer having nodes and graphite layers disposed on both sides of the carbon fiber mesh layer having nodes.
In the invention, the cathode plate layer comprises a graphite layer, and a carbon fiber net layer and a graphite layer which are positioned on two sides of the graphite layer and provided with nodes in sequence.
In the present invention, the graphite layer has a thickness of 3 to 10mm, for example, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc. When the thickness of the graphite layer is less than 3mm, the composite plate formed after die pressing is thin, and the risk of air leakage exists; when the thickness of the graphite layer is higher than 10mm, the composite plate formed after die pressing is too thick, which is not beneficial to the miniaturization of the galvanic pile and the promotion of volume power density.
In the present invention, the ash content of the graphite layer is less than 0.4%, for example, 0.01%, 0.05%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.39%, etc.
In the present invention, the content of the metal element in the graphite layer is less than 10ppm, for example, 1ppm, 2ppm, 3ppm, 4ppm, 5ppm, 6ppm, 7ppm, 8ppm, 9ppm, 10ppm, etc.
In the invention, the graphite layer is an expanded graphite plate layer or a graphite paper layer.
In the present invention, the density of the expanded graphite sheet layer is 0.05 to 0.5g/cm3E.g. 0.05g/cm3、0.1g/cm3、0.15g/cm3、0.2g/cm3、0.25g/cm3、0.3g/cm3、0.35g/cm3、0.4g/cm3、0.45g/cm3、0.5g/cm3And the like. When the density of the expanded graphite plate is within the limited range, the compression molding is convenient; when the density of the expanded graphite sheet layer is less than 0.05g/cm3The porosity of the molded plate is too high, and the conductivity of the composite plate is too low after glue injection; when the density of the expanded graphite sheet layer is higher than 0.5g/cm3The porosity of the molded board is too low, the injection quantity is too small, and the mechanical strength is too low.
In the invention, the density of the graphite paper layer is 0.8-1.2g/cm3E.g. 0.8g/cm3、0.85g/cm3、0.9g/cm3、0.95g/cm3、1.0g/cm3、1.05g/cm3、1.1g/cm3、1.15g/cm3、1.2g/cm3And the like. When the density of the graphite paper layer is within the limited range, glue injection and molding are convenient to form; when the density of the graphite paper layer is lower than 0.8g/cm3The glue injection amount is too much, so that the conductivity of the composite board is too low; when the density of the graphite paper layer is higher than 1.2g/cm3The glue injection amount is too small, and the mechanical strength of the composite board is too low.
In the invention, the mesh number of the carbon fiber mesh in the carbon fiber mesh layer with nodes is 50-2000 mesh, such as 50 mesh, 100 mesh, 150 mesh, 200 mesh, 250 mesh, 300 mesh, 350 mesh, 400 mesh, 450 mesh, 500 mesh, 550 mesh, 600 mesh, 650 mesh, 700 mesh, 750 mesh, 800 mesh, 850 mesh, 900 mesh, 950 mesh, 1000 mesh and the like. When the mesh number of the carbon fiber net is within the range, the composite board after compression molding is convenient to have proper mechanical strength and conductivity; when the mesh number of the carbon fiber net is less than 50 meshes, the combination between graphite layers is not facilitated; when the mesh number of the carbon fiber net is higher than 2000 meshes, the mechanical strength of the composite plate is not obviously improved after compression molding.
In the present invention, the diameters of the warp carbon fiber bundles and the weft carbon fiber bundles in the carbon fiber mesh layer with nodes are 0.05 to 2mm, such as 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, etc. When the diameters of the warp and weft fiber bundles are higher than 2mm, the graphite layer and the carbon fibers are easy to separate and warp after compression molding; when the diameter is less than 0.05mm, the mechanical strength and the conductivity of the composite plate after compression molding are not obviously improved.
The warp fiber bundles and the weft fiber bundles in the present invention are only introduced for convenience of description, and as is well known in the art, to form a carbon fiber net structure, a group of several fiber bundles arranged in parallel and another group of several fiber bundles arranged in parallel are required, wherein one group and the other group are arranged crosswise to form a fiber net structure, wherein one group of the fiber bundles arranged in parallel is referred to as warp fiber bundles, and the other group is referred to as weft cellulose arranged crosswise to the warp fiber bundles.
In the invention, the nodes in the carbon fiber net layer with the nodes are formed by knotting at the junctions of the warp carbon fiber bundles and the weft carbon fiber bundles.
In the invention, the mechanical strength and the electrical conductivity of the composite board can be obviously improved by knotting the junction of the warp carbon fiber bundles and the weft carbon fiber bundles;
in the present invention, the nodes have a radial dimension of 0.1-2mm, such as 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, etc. When the radial size of the node is within a given range, the composite pole plate after compression molding has proper mechanical strength and conductivity; when the radial size of the node is lower than 0.1mm, the performance is not obviously improved; when the radial dimension of the node is more than 2mm, separation and warping of graphite layers are easily caused.
In the invention, a snake-shaped flow channel is arranged in the anode plate layer. The serpentine channels are provided on the anode plate to facilitate the flow of hydrogen. In the invention, the cathode plate layer is provided with a straight flow channel. The function of the direct current channel arranged on the cathode plate layer is to facilitate the circulation of air.
The second purpose of the present invention is to provide a method for preparing a composite bipolar plate according to the first purpose, comprising: and bonding the anode plate layer and the cathode plate layer to obtain the composite bipolar plate.
In the invention, the preparation method of the anode plate layer comprises the following steps: and alternately arranging the graphite layers and the carbon fiber net layers with the nodes, ensuring that the graphite layers are arranged on two sides of the carbon fiber net layers with the nodes, pressing, and gluing to obtain the anode plate layer.
In the present invention, the method for preparing the cathode plate layer includes: and alternately arranging the graphite layers and the carbon fiber net layers with the nodes, ensuring that the graphite layers are arranged on two sides of the carbon fiber net layers with the nodes, pressing, and gluing to obtain the cathode plate layer.
The preparation method of the composite bipolar plate is simple, the raw materials are easy to obtain, the price is low, the realization is easy, and the industrial large-scale production and application are facilitated.
In the present invention, the pressing method comprises pressing and/or rolling, preferably pressing.
In the present invention, the molding is performed by a molding machine.
In the invention, the pressing speed of the mould press is 0.2-2mm/min, the pressing pressure is 50-150MPa, and the mould pressing time is 5-20 min.
In the present invention, the vacuum-pumping process is performed simultaneously in the pressing process.
In the present invention, the degree of vacuum used for the vacuum treatment is (-0.09 to-0.1) MPa, for example, -0.09MPa, -0.091MPa, -0.092MPa, -0.093MPa, -0.094MPa, -0.095MPa, -0.096MPa, -0.097MPa, -0.098MPa, -0.099MPa, -0.1MPa, etc.
In the present invention, the mold used in the lamination process of the anode plate layer is a mold with a serpentine shape.
In the present invention, the mold used in the lamination process of the cathode sheet layer is a mold with a straight shape.
In the present invention, the gluing includes dipping the laminate obtained after pressing in a resin glue, and then curing.
In the present invention, the time for the impregnation is 1 to 24h, for example 1h, 3h, 5h, 7h, 10h, 12h, 15h, 17h, 20h, 22h, 24h, etc.
In the present invention, the impregnation is performed in a vacuum environment.
In the present invention, the degree of vacuum in the vacuum environment is (-0.09 to-0.1) MPa, for example, -0.09MPa, -0.091MPa, -0.092MPa, -0.093MPa, -0.094MPa, -0.095MPa, -0.096MPa, -0.097MPa, -0.098MPa, -0.099MPa, or-0.1 MPa.
In the present invention, the viscosity of the resin paste is (1 to 10) pas, for example, 1 pas, 2 pas, 3 pas, 4 pas, 5 pas, 6 pas, 7 pas, 8 pas, 9 pas, 10 pas, and the like.
In the invention, the resin glue is Heren 41814 glue.
According to the invention, the anode plate layer and the cathode plate layer are bonded through the resin adhesive, so that the anode plate layer, the holes in the plate layer and the holes in the plate layer can be effectively filled, and the air leakage condition is avoided.
In the present invention, the curing is carried out in a water bath.
In the present invention, the curing time is 10-120min, such as 10min, 20min, 30min, 40min, 50min, 60min, 70min, 80min, 90min, 100min, 110min, 120min, etc.
In the present invention, the curing temperature is 70 to 95 ℃, for example, 70 ℃, 75 ℃, 80 ℃, 85 ℃, 90 ℃, 95 ℃ and the like.
In the present invention, the adhesive bonding further comprises drying a cured product obtained after curing.
In the present invention, the drying includes placing the cured product obtained after curing in a drying tank and purging with dry air.
In the present invention, the temperature of the purge is 30 to 60 ℃, for example, 30 ℃, 35 ℃, 40 ℃, 45 ℃, 50 ℃, 55 ℃, 60 ℃ and the like.
In the present invention, the purging time is 10-120min, such as 10min, 20min, 30min, 40min, 50min, 60min, 70min, 80min, 90min, 100min, 110min, 120min, etc.
In the present invention, the humidity of the dry air is 5 to 30%, for example, 5%, 8%, 10%, 12%, 15%, 17%, 20%, 22%, 25%, 27%, 30%, etc.
The invention also aims to provide a proton exchange membrane fuel cell, which comprises the composite bipolar plate.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the graphite layers and the carbon fiber net layers with nodes are alternately arranged on the anode plate layer and the cathode plate layer, so that the obtained composite bipolar plate has better flexibility, mechanical strength, electrical conductivity and thermal conductivity, and can effectively reduce the internal resistance of a fuel cell when being used in the fuel cell, thereby improving the cell performance and the discharge efficiency, wherein the electrical conductivity is up to 93S-cm, and the flexural strength is up to 55 MPa; the composite bipolar plate has the advantages of simple preparation method, easily obtained raw materials, low price and convenience for industrial large-scale production and application.
Drawings
FIG. 1 is a structural view of an anode plate layer and a cathode plate layer in example 1;
FIG. 2 is a structural view of an anode plate layer and a cathode plate layer in example 6;
wherein, 1 is a graphite layer, and 2 is a carbon fiber net layer with nodes.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
The embodiment provides a composite bipolar plate, which comprises an anode plate layer and a cathode plate layer which are connected together, wherein the structural diagrams of the anode plate and the cathode plate are both shown in fig. 1, and each composite bipolar plate comprises two graphite layers 1 (Qingdao sea) and a carbon fiber net layer 2 with nodes, which is arranged between the two graphite layers (on the basis of the existing carbon fiber net, carbon fibers are used for knotting at the nodes at the junctions of warps and wefts or the warps and wefts are knotted in the weaving process of the carbon fiber net); wherein the graphite layer 1 is a graphite plate layer with a thickness of 5mm, an ash content of 0.2%, a metal element content of 5ppm, and a density of 0.1g/cm3(ii) a The mesh number of the carbon fiber net in the carbon fiber net layer 2 with the nodes is 100 meshes, the diameters of the warp carbon fiber bundles and the weft carbon fiber bundles are 0.1mm, and the radial size of the nodes is 1 mm; the anode plate layer is provided with a snake-shaped flow channel, and the cathode plate layer is provided with a straight flow channel.
The embodiment also provides a preparation method of the composite bipolar plate, which comprises the following steps:
(1) the carbon fiber net layer is placed between two expanded graphite plate layers, the length and width dimensions of the carbon fiber net layer and the expanded graphite plate layers are the same, then the laminated composite plate assembly is placed in a mold with a snake-shaped forming flow channel and transferred onto a platform of a molding press, the pressing speed of the molding press is 1mm/min, the pressing pressure is 50MPa, the pressure maintaining time is 10min, vacuum pumping is simultaneously carried out in the pressure maintaining process, and the vacuum degree is-0.098 MPa. Putting the molded polar plate into Heren 41814 low-viscosity resin adhesive, performing impregnation treatment for 6h under the condition that the vacuum degree is-0.098 MPa, taking out the plate after vacuum impregnation, washing off the adhesive solution on the surface by using pure water, then putting the plate into a water bath tank at 85 ℃ for curing for 20min, then putting the cured polar plate into a drying tank, and purging with dry air (the humidity is 20 percent and the temperature is 50 ℃) for 20min to obtain an anode plate layer;
(2) preparing a cathode plate layer according to the preparation method in the step (1), wherein the difference is that the adopted mould is a mould with a straight forming runner, and the other preparation methods are the same as the step (1);
(3) and (3) gluing the anode plate layer obtained in the step (1) and the cathode plate layer obtained in the step (2) together to obtain the composite bipolar plate.
Example 2
The embodiment provides a composite bipolar plate, which comprises an anode plate layer and a cathode plate layer which are connected together, wherein the anode plate layer and the cathode plate layer comprise 2 graphite layers and a carbon fiber net layer with nodes, and the carbon fiber net layer is arranged between the 2 graphite layers; wherein the graphite layer is a graphite plate layer with a thickness of 3mm, an ash content of 0.3%, a metal element content of 8ppm, and a density of 0.1g/cm3(ii) a The mesh number of the carbon fiber net in the carbon fiber net layer with the nodes is 100 meshes, the diameters of the warp carbon fiber bundles and the weft carbon fiber bundles are 0.1mm, and the radial size of the nodes is 0.5 mm; the anode plate layer is provided with a snake-shaped flow channel, and the cathode plate layer is provided with a straight flow channel.
The embodiment also provides a preparation method of the composite bipolar plate, which comprises the following steps:
(1) the carbon fiber net layer is placed between two expanded graphite plate layers, the length and width dimensions of the carbon fiber net layer and the expanded graphite plate layers are the same, then the laminated composite plate assembly is placed in a mold with a snake-shaped forming flow channel and transferred onto a platform of a molding press, the pressing speed of the molding press is 0.8mm/min, the pressing pressure is 80MPa, the pressure maintaining time is 15min, vacuum pumping is simultaneously carried out in the pressure maintaining process, and the vacuum degree is-0.098 MPa. Putting the molded polar plate into commercially available Heren 41814 low-viscosity resin adhesive, performing impregnation treatment for 8h under the condition that the vacuum degree is-0.098 MPa, taking out the plate after vacuum impregnation, washing away glue solution on the surface by using pure water, then putting the plate into a water bath tank at 90 ℃ for curing for 25min, then putting the cured polar plate into a drying tank, and purging with dry air (the humidity is 20 percent and the temperature is 50 ℃) for 20min to obtain an anode plate layer;
(2) preparing a cathode plate layer according to the preparation method in the step (1), wherein the difference is that the adopted mould is a mould with a straight forming runner, and the other preparation methods are the same as the step (1);
(3) and (3) gluing the anode plate layer obtained in the step (1) and the cathode plate layer obtained in the step (2) together to obtain the composite bipolar plate.
Example 3
The embodiment provides a composite bipolar plate, which comprises an anode plate layer and a cathode plate layer which are connected together, wherein the anode plate layer and the cathode plate layer comprise 2 graphite layers and a carbon fiber net layer with nodes, and the carbon fiber net layer is arranged between the 2 graphite layers; wherein the graphite layer is a graphite paper layer with a thickness of 0.5mm, an ash content of 0.1%, a metal element content of 0.5ppm, and a density of 0.8g/cm3(ii) a The mesh number of the carbon fiber net in the carbon fiber net layer with the nodes is 200 meshes, the diameters of the warp carbon fiber bundles and the weft carbon fiber bundles are 0.05mm, and the radial size of the nodes is 0.2 mm; the anode plate layer is provided with a snake-shaped flow channel, and the cathode plate layer is provided with a straight flow channel.
The embodiment also provides a preparation method of the composite bipolar plate, which comprises the following steps:
(1) the carbon fiber net layer is placed between the two expanded graphite paper layers, the length and width of the carbon fiber net layer are the same as those of the expanded graphite paper layers, and then the laminated composite board assembly is placed into a rolling machine for rolling forming, wherein the rolling pressure is 20 tons (the anode plate and the cathode plate are not formed simultaneously, and the dies used for forming the anode plate and the cathode plate are different). Putting the rolled and formed pole plate into commercially available Heren 41814 low-viscosity resin glue, soaking for 6h under the condition that the vacuum degree is-0.098 MPa, taking out the plate after vacuum soaking, washing away glue solution on the surface by using pure water, then putting the plate into a water bath tank at 85 ℃ for curing for 20min, then putting the cured pole plate into a drying tank, and blowing for 20min by using dry air (the humidity is 20 percent and the temperature is 50 ℃). Finally, the anode plate and the cathode plate are bonded together to form the carbon fiber mesh reinforced composite bipolar plate;
(2) preparing a cathode plate layer according to the preparation method in the step (1);
(3) and (3) gluing the anode plate layer obtained in the step (1) and the cathode plate layer obtained in the step (2) together to obtain the composite bipolar plate.
Example 4
The embodiment provides a composite bipolar plate, which comprises an anode plate layer and a cathode plate layer which are connected together, wherein the anode plate layer and the cathode plate layer comprise 2 graphite layers and a carbon fiber net layer with nodes, and the carbon fiber net layer is arranged between the 2 graphite layers; wherein the graphite layer is a graphite plate layer with a thickness of 10mm, an ash content of 0.1%, a metal element content of 1ppm, and a density of 0.05g/cm3(ii) a The mesh number of the carbon fiber net in the carbon fiber net layer with the nodes is 50 meshes, the diameters of the warp carbon fiber bundles and the weft carbon fiber bundles are 0.05mm, and the radial size of the nodes is 0.1 mm; the anode plate layer is provided with a snake-shaped flow channel, and the cathode plate layer is provided with a straight flow channel.
The embodiment also provides a preparation method of the composite bipolar plate, which comprises the following steps:
(1) the carbon fiber net layer is placed between two expanded graphite plate layers, the length and width dimensions of the carbon fiber net layer and the expanded graphite plate layers are the same, then the laminated composite plate assembly is placed in a mold with a snake-shaped forming flow channel and transferred onto a platform of a molding press, the pressing speed of the molding press is 0.2mm/min, the pressing pressure is 50MPa, the pressure maintaining time is 20min, vacuum pumping is simultaneously carried out in the pressure maintaining process, and the vacuum degree is-0.09 MPa. Putting the molded polar plate into commercially available Heren 41814 low-viscosity resin adhesive, performing impregnation treatment for 24 hours under the condition that the vacuum degree is-0.09 MPa, taking out the plate after vacuum impregnation, washing away the adhesive solution on the surface by using pure water, then putting the plate into a 70 ℃ water bath tank for curing for 120min, then putting the cured polar plate into a drying tank, and purging for 10min by using dry air (the humidity is 5 percent and the temperature is 30 ℃) to obtain an anode plate layer;
(2) preparing a cathode plate layer according to the preparation method in the step (1), wherein the difference is that the adopted mould is a mould with a straight forming runner, and the other preparation methods are the same as the step (1);
(3) and (3) gluing the anode plate layer obtained in the step (1) and the cathode plate layer obtained in the step (2) together to obtain the composite bipolar plate.
Example 5
The embodiment provides a composite bipolar plate, which comprises an anode plate layer and a cathode plate layer which are connected together, wherein the anode plate layer and the cathode plate layer comprise 2 graphite layers and a carbon fiber net layer with nodes, and the carbon fiber net layer is arranged between the 2 graphite layers; wherein the graphite layer is a graphite plate layer with a thickness of 3mm, an ash content of 0.38%, a metal element content of 9ppm, and a density of 0.5g/cm3(ii) a The mesh number of the carbon fiber net in the carbon fiber net layer with the nodes is 2000 meshes, the diameters of the warp carbon fiber bundles and the weft carbon fiber bundles are 2mm, and the radial size of the nodes is 2 mm; the anode plate layer is provided with a snake-shaped flow channel, and the cathode plate layer is provided with a straight flow channel.
The embodiment also provides a preparation method of the composite bipolar plate, which comprises the following steps:
(1) the carbon fiber net layer is placed between two expanded graphite plate layers, the length and width dimensions of the carbon fiber net layer and the expanded graphite plate layers are the same, then the laminated composite plate assembly is placed in a mold with a snake-shaped forming flow channel and transferred onto a platform of a molding press, the pressing speed of the molding press is 2mm/min, the pressing pressure is 150MPa, the pressure maintaining time is 5min, vacuum pumping is carried out simultaneously in the pressure maintaining process, and the vacuum degree is-0.1 MPa. Putting the molded polar plate into commercially available Heren 41814 low-viscosity resin adhesive, performing impregnation treatment for 1h under the condition that the vacuum degree is-0.1 MPa, taking out the plate after vacuum impregnation, washing away the adhesive solution on the surface by using pure water, then putting the plate into a water bath tank at 95 ℃ for curing for 10min, then putting the cured polar plate into a drying tank, and purging for 120min by using dry air (the humidity is 30 percent and the temperature is 60 ℃) to obtain an anode plate layer;
(2) preparing a cathode plate layer according to the preparation method in the step (1), wherein the difference is that the adopted mould is a mould with a straight forming runner, and the other preparation methods are the same as the step (1);
(3) and (3) gluing the anode plate layer obtained in the step (1) and the cathode plate layer obtained in the step (2) together to obtain the composite bipolar plate.
Example 6
The difference from the embodiment 1 is only that, as shown in fig. 2, the structure of the anode plate layer and the cathode plate layer comprises three graphite layers 1, and carbon fiber mesh layers 2 with nodes are arranged in the two adjacent graphite layers 1, and the rest of the composition and the preparation method are the same as the embodiment 1.
Example 7
The difference from example 1 is only that the graphite layer has a thickness of 1mm, and the rest of the composition and the preparation method are the same as those of example 1.
Example 8
The difference from example 1 is only that the graphite layer has a thickness of 15mm, and the rest of the composition and the preparation method are the same as those of example 1.
Example 9
The difference from example 1 is only that the diameter of the fiber bundle of the carbon fiber web in the carbon fiber web layer with nodes is 5mm, and the rest of the composition and the preparation method are the same as those of example 1.
Example 10
The difference from example 1 is only that the diameter of the fiber bundle of the carbon fiber web in the carbon fiber web layer with nodes is 0.01mm, and the rest of the composition and the preparation method are the same as those of example 1.
Example 11
The difference from the example 1 is only that the mesh number of the carbon fiber net in the carbon fiber net layer with the nodes is 10 meshes, and the rest of the composition and the preparation method are the same as the example 1.
Example 12
The difference from example 1 is only that the radial dimension of the node is 5mm, and the rest of the composition and the preparation method are the same as those of example 1.
Comparative example 1
The difference from the example 1 is only that the carbon fiber mesh layer does not include the node, and the rest of the composition and the preparation method are the same as the example 1.
Comparative example 2
75 wt% of expanded graphite, 20 wt% of resin (HeNeng 41814 glue) and 5 wt% of carbon fiber are mixed, molded, cured and dried to obtain a composite board, wherein the molding, curing and drying conditions are the same as those of example 1.
The composite bipolar plates obtained in examples 1 to 13 and comparative examples 1 to 3 were subjected to performance tests with the following test standards: GB/T20042.6-2011, the test results are shown in Table 1:
TABLE 1
Figure BDA0002208964180000151
Figure BDA0002208964180000161
As can be seen from Table 1, the composite bipolar plate obtained by the invention has higher conductivity and flexural strength, the conductivity is as high as 93S-cm, and the flexural strength is as high as 55 MPa; from a comparison of example 1 and examples 7-8, it can be seen that when the thickness of the graphite layer is outside the range defined by the present invention, the electrical conductivity and bending strength of the composite bipolar plate are affected; from a comparison of example 1 and examples 9-10, it can be seen that when the diameter of the fiber bundles of the carbon fiber web in the carbon fiber web layer with nodes is outside the range defined by the present invention, the bending strength of the composite bipolar plate is affected; as can be seen from the comparison between example 1 and example 11, when the mesh number of the carbon fiber mesh in the carbon fiber mesh layer with nodes is too low, the electrical conductivity and the bending strength of the composite bipolar plate are affected; as can be seen from the comparison between example 1 and example 12, when the radial dimension of the node is too high, the graphite layer is easily separated and warped, thereby affecting the electrical conductivity and bending strength of the composite bipolar plate; as can be seen from the comparison between example 1 and comparative example 1, when the carbon fiber mesh layer does not include nodes, the electrical conductivity and bending strength of the composite bipolar plate are greatly affected; as can be seen from a comparison of example 1 and comparative example 2, the electrical conductivity and bending strength of the composite bipolar plate are greatly affected when only a simple physical mixture of several materials is used.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.

Claims (32)

1. A composite bipolar plate comprises an anode plate layer and a cathode plate layer which are connected together, and is characterized in that the anode plate layer and the cathode plate layer respectively comprise graphite layers and carbon fiber net layers with nodes which are alternately arranged, and the graphite layers are arranged on two sides of the carbon fiber net layers with the nodes;
the nodes in the carbon fiber net layer with the nodes are formed by knotting at the junctions of the warp carbon fiber bundles and the weft carbon fiber bundles, and the radial size of the nodes is 0.1-2 mm;
the mesh number of the carbon fiber net in the carbon fiber net layer with the nodes is 100-2000 meshes;
a snake-shaped flow channel is arranged in the anode plate layer;
a straight flow channel is arranged in the cathode plate layer;
the knotting treatment is that on the basis of the existing carbon fiber net, the carbon fibers are used for knotting at the joints of the warps and the wefts at the junctions; or knotting the warp and the weft in the weaving process of the carbon fiber net;
the graphite layer is an expanded graphite plate layer or a graphite paper layer.
2. The composite bipolar plate of claim 1 wherein said anode plate layer comprises a carbon fiber web layer with nodes and graphite layers disposed on both sides of the carbon fiber web layer with nodes.
3. The composite bipolar plate of claim 2 wherein said anode plate layer comprises a graphite layer and a carbon fiber mesh layer with nodes and a graphite layer disposed in sequence on either side of the graphite layer.
4. The composite bipolar plate of claim 1, wherein said cathode plate layer comprises a carbon fiber web layer with nodes and graphite layers disposed on both sides of the carbon fiber web layer with nodes.
5. The composite bipolar plate of claim 4 wherein said cathode plate layer comprises a graphite layer and a carbon fiber mesh layer with nodes and a graphite layer disposed in sequence on either side of the graphite layer.
6. Composite bipolar plate according to claim 1, characterised in that the graphite layer has a thickness of 3-10 mm.
7. Composite bipolar plate according to claim 6, characterised in that the ash content of the graphite layers is below 0.4%.
8. Composite bipolar plate according to claim 7, characterised in that the content of metallic elements in the graphite layers is below 10 ppm.
9. The composite bipolar plate of claim 1 wherein said expanded graphite sheet layer has a density of 0.05 to 0.5g/cm3。
10. The composite bipolar plate of claim 1 wherein said graphite paper layer has a density of 0.8-1.2g/cm3。
11. The composite bipolar plate of claim 1, wherein the diameter of the warp carbon fiber bundles and the diameter of the weft carbon fiber bundles in the carbon fiber mesh layer with nodes are both 0.05-2 mm.
12. The composite bipolar plate of claim 1, wherein said anode plate layers are bonded together by a resin adhesive.
13. The composite bipolar plate of claim 1 wherein said cathode plate layers are bonded together by a resin adhesive.
14. Composite bipolar plate according to claim 12 or 13, characterised in that the viscosity of the resin glue is (1-10) Pa-s.
15. The composite bipolar plate of claim 14 wherein said resin glue is hernen 41814 glue.
16. A method of fabricating a composite bipolar plate as claimed in any one of claims 1 to 15, wherein the method of fabricating the composite bipolar plate comprises: bonding the anode plate layer and the cathode plate layer to obtain the composite bipolar plate;
the preparation method of the anode plate layer comprises the following steps: arranging graphite layers and carbon fiber net layers with nodes alternately to ensure that the graphite layers are arranged on two sides of the carbon fiber net layers with the nodes, pressing, and gluing to obtain the anode plate layer; the mould used in the lamination process of the anode plate layer is a mould with a snake shape;
the preparation method of the cathode plate layer comprises the following steps: arranging graphite layers and carbon fiber net layers with nodes alternately to ensure that the graphite layers are arranged on two sides of the carbon fiber net layers with the nodes, pressing, and gluing to obtain the cathode plate layer; the die used in the lamination process of the cathode plate layer is a die with a straight shape;
the pressing method is mould pressing;
the gluing comprises the steps of putting the laminated object obtained after pressing into resin glue for dipping and then curing.
17. The method of claim 16, wherein the molding is performed by a molding press.
18. The method of claim 17, wherein the operating parameters of the molding press during molding include: the pressing speed is 0.2-2mm/min, the pressing pressure is 50-150MPa, and the mould pressing time is 5-20 min.
19. The production method according to claim 16, wherein a vacuum evacuation treatment is simultaneously performed in performing the pressing.
20. The method according to claim 19, wherein the degree of vacuum for the evacuation treatment is (-0.09 to-0.1) MPa.
21. The method of claim 16, wherein the time for the immersion is 1 to 24 hours.
22. The method of claim 16, wherein the impregnating is performed in a vacuum environment.
23. The method of claim 22, wherein the vacuum environment has a vacuum degree of (-0.09 to-0.1) MPa.
24. The method of claim 16, wherein the curing is performed in a water bath.
25. The method of claim 16, wherein the curing time is 10-120 min.
26. The method of claim 16, wherein the curing temperature is 70-95 ℃.
27. The method according to claim 16, wherein the step of adhering further comprises drying a cured product obtained after curing.
28. The production method according to claim 27, wherein the drying comprises placing the cured product obtained after curing in a drying tank and purging with dry air.
29. The method of claim 28, wherein the temperature of the purge is 30-60 ℃.
30. The method of claim 28, wherein the time for purging is 10-120 min.
31. The method of claim 28, wherein the humidity of the drying air is 5-30%.
32. A proton exchange membrane fuel cell comprising a composite bipolar plate according to any one of claims 1 to 15.
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