WO2022150953A1 - Bipolar plate and manufacturing method therefor, and proton exchange membrane fuel cell - Google Patents

Bipolar plate and manufacturing method therefor, and proton exchange membrane fuel cell Download PDF

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Publication number
WO2022150953A1
WO2022150953A1 PCT/CN2021/071215 CN2021071215W WO2022150953A1 WO 2022150953 A1 WO2022150953 A1 WO 2022150953A1 CN 2021071215 W CN2021071215 W CN 2021071215W WO 2022150953 A1 WO2022150953 A1 WO 2022150953A1
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bipolar plate
layer
base layer
filler
base
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PCT/CN2021/071215
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French (fr)
Chinese (zh)
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韦剑飞
聂骁
霍夫曼·洛塔尔
库尔茨贝克·施特凡
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舍弗勒技术股份两合公司
韦剑飞
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Priority to PCT/CN2021/071215 priority Critical patent/WO2022150953A1/en
Publication of WO2022150953A1 publication Critical patent/WO2022150953A1/en

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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
    • H01M8/0223—Composites
    • H01M8/0228—Composites in the form of layered or coated products

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  • the present invention relates to the field of fuel cells, and more particularly, to a bipolar plate for a fuel cell and a method for manufacturing the same, and a proton exchange membrane fuel cell including the bipolar plate.
  • Bipolar plates typically serve the following functions: distribute hydrogen and air within the cell; separate individual cells in the stack; support water management within the cell; serve as a conductive path from the cell to the load; and support the thermal management of the cell (cooling and heating). Therefore, first of all, the bipolar plate needs to have good electrical and thermal conductivity, good processing and forming ability, and certain hydrophobic properties; secondly, since the bipolar plate works under acidic conditions, the bipolar plate should also have corrosion resistance; again; , in order to increase the energy density, the bipolar plate should be as thin as possible.
  • Different materials are used to manufacture bipolar plates in the prior art, as follows.
  • the first material is various graphite materials.
  • Graphite materials have good durability, but bipolar plates made of graphite materials are difficult to make sufficiently thin due to their poor mechanical properties (low strength and poor toughness).
  • the second material is a metallic material. Due to the good mechanical properties of metal materials, bipolar plates made of metal materials can be very thin, and metal materials such as stainless steel can have good cold deformation forming properties, which are suitable for rapid production in large quantities. However, with the exception of noble metals such as gold, platinum, iridium, etc., the corrosion resistance of other metals is insufficient. Although stainless steel has good corrosion resistance, its corrosion resistance is due to the formation of a high chromium oxide film on the surface. The conductivity of the oxide film is low, and the contact resistance between the bipolar plate and the gas diffusion layer (GDL) increases. The resistance loss of the fuel cell increases. In order to improve corrosion resistance while maintaining good surface conductivity, a coating with good corrosion resistance is usually formed on the surface of metal materials.
  • GDL gas diffusion layer
  • the surface coating increases the cost of the bipolar plate, and if the coating is not completely dense, the base metal ions may contaminate the membrane electrode of the fuel cell during use, thereby deteriorating the performance of the fuel cell.
  • the durability is often not comparable to that of bipolar plates made of graphite materials.
  • the third material is a composite material.
  • Composite materials are mixtures of base polymers with electrically and thermally conductive fillers (eg, graphite, carbon nanotubes, etc.). Although the corrosion resistance is improved compared to bipolar plates made of metallic materials, the electrical and thermal conductivity of composites is a bottleneck limiting their use due to the presence of non-conductive or low-conductivity polymer phases.
  • the electrical and thermal conductivity of composite materials depends on the volume percentage concentration of electrical and thermal conductive fillers. A high volume percentage concentration of electrical and thermal conductive fillers can increase electrical and thermal conductivity, but at the same time, mechanical properties decrease. Therefore, how to solve the electrical and thermal conductivity of composite materials while maintaining Sufficient mechanical strength is one of the keys to composite bipolar plates.
  • An object of the present invention is to provide a new bipolar plate and a method for manufacturing the same, which has better durability and can be made thin enough.
  • Another object of the present invention is to provide a proton exchange membrane fuel cell including the above bipolar plate.
  • the present invention provides a bipolar plate for use in a fuel cell and comprising:
  • a base layer made of a metallic material
  • a filler layer, the filler layer is made of a composite material mixed with a base polymer and a conductive filler, and the filler layer is fixed to the base layer in a manner of covering one side or both sides of the base layer.
  • the volume percentage concentration of the conductive filler is more than 70%.
  • the base polymer comprises at least one selected from the following thermoplastic materials: PP, PVF, PVDF, PTFE, PCTFE, ETFE, PA, PPA, PPS, LCP, PEK, PEEK, PC, PPE, PSU , PESU, PEI; or
  • the base polymer includes at least one selected from the following thermosetting materials: phenolic resin, epoxy resin, melamine resin, polyimide, unsaturated polyester resin, polyamideimide; or
  • the base polymer includes at least one selected from the following rubbers: FKM, FFKM, EPDM, HNBR, CR, IIR, CSM, FVMQ.
  • the conductive filler is at least one selected from the following materials: carbon black, graphite, carbon fiber, carbon nanotube, graphene, ceramic and metal particles.
  • the thickness D1 of the base layer and the thickness D2 of the filler layer satisfy the following relationship: 20 ⁇ m ⁇ D1, and 1 ⁇ m ⁇ D2 ⁇ 100 ⁇ m.
  • the base layer is a metal plate or a metal mesh, and the elongation of the metal material is greater than 20%.
  • the metal material is at least one selected from the following materials: low carbon steel, stainless steel, copper, copper alloy, aluminum, aluminum alloy.
  • the surface of the base layer is subjected to anti-corrosion treatment and/or roughening treatment.
  • the present invention also provides a method for manufacturing a bipolar plate according to any one of the above technical solutions, the manufacturing method comprising the following steps:
  • the filler layer is fixed to the base layer in a manner of covering one side or both sides of the base layer to form a semi-finished product
  • the semi-finished product is formed into a bipolar plate having a predetermined geometry.
  • the base polymer is formed into a powder state or a liquid state.
  • the base polymer and the conductive material are mixed or mixed with a ball mill to obtain the composite material.
  • the present invention also provides the following proton exchange membrane fuel cell, which includes the bipolar plate described in any one of the above technical solutions.
  • the present invention provides a bipolar plate and a manufacturing method thereof.
  • the bipolar plate includes a base layer and a filler layer fixed together, the base layer is made of a metal material, and the filler layer is made of a mixed material of a base polymer and a conductive filler.
  • the filler layer is fixed to the base layer in a manner of covering one side or both sides of the base layer.
  • the bipolar plate uses the base layer made of metal material as the skeleton, the machinability and structural strength of the entire bipolar plate are improved, so that the entire bipolar plate can be made thin enough; in addition, the bipolar plate It also includes a filler layer made of a composite material obtained by mixing the base polymer and the conductive filler, and the filler layer has strong corrosion resistance, so that the durability of the entire bipolar plate is effectively improved.
  • FIG. 1 is a schematic diagram showing the structure of a bipolar plate according to a first embodiment of the present invention.
  • FIG. 2 is a schematic diagram showing a partial structure of a rolling device for manufacturing the semi-finished product of the bipolar plate shown in FIG. 1 .
  • FIG. 3 is a schematic diagram showing the structure of a bipolar plate according to a second embodiment of the present invention.
  • the bipolar plate according to the present invention can be used in a fuel cell, and the function of the bipolar plate in the fuel cell is the same as that of the conventional bipolar plate described in the background art. Exemplary embodiments of the present invention are described below with reference to the accompanying drawings.
  • the bipolar plate according to the first embodiment of the present invention includes a base layer 1 and two filler layers 2 fixed together.
  • the base layer 1 is a metal plate made of a metal material and is located between the two filler layers 2 , so that the base layer 1 and the two filler layers 2 are stacked together in the thickness direction T.
  • the thickness D1 of the base layer 1 was 50 ⁇ m. In this way, the base layer 1 can be made thin enough by taking advantage of the excellent machinability of metal; and when the bipolar plate is made very thin, the base layer 1 can enhance the strength of the bipolar plate and play the role of a skeleton .
  • the metal material for making the base layer 1 may be at least one material selected from the following materials: low carbon steel, stainless steel, copper, copper alloy, aluminum, aluminum alloy. In the case of low carbon steel, the low carbon steel is preferably treated for corrosion resistance.
  • the metal plate is roughened. Concavities and convexities or textures can be formed on the surface of the metal plate by rolling, and the surface of the metal plate can also be roughened by chemical treatment or sandblasting, or by laser roughening or texturing.
  • the filler layer 2 is made of a composite material made by mixing a base polymer and a conductive filler, the base polymer is used to bond various substances in the composite material together, and the conductive filler is used to realize the Conductive function.
  • the two layers of filler layers 2 sandwich the base layer 1 , and each filler layer 2 is attached and fixed to the base layer 1 in a manner of covering the corresponding side surfaces of the base layer 1 .
  • the filler layer 2 can be made to have a sufficient thickness.
  • the filler layer 2 The thickness D2 is 20 ⁇ m.
  • the filler layer 2 mainly serves the purpose of improving the durability of the bipolar plate.
  • the above-mentioned base polymer is preferably selected from a material with very good acid resistance.
  • the base polymer may include at least one selected from the following thermoplastic materials: PP (polypropylene), PVF (polyvinyl fluoride), PVDF (polyvinylidene fluoride), PTFE (polytetrafluoroethylene), PCTFE ( Polychlorotrifluoroethylene), ETFE (ethylene tetrafluoroethylene), PA (polyamide), PPA (polyphthalamide), PPS (polyphenylene sulfide), LCP (liquid crystal polymer), PEK (polyether) ether ketone), PEEK (polyether ether ketone), PC (polycarbonate), PPE (polyphenylene ether), PSU (polysulfone), PESU (polyethersulfone), PEI (
  • the base polymer After selecting the base polymer and the conductive material, before uniformly mixing the base polymer and the conductive filler to obtain the composite material, the base polymer is formed into a fine powder state or a low viscosity liquid state with a viscosity less than a predetermined value, the fine powder state and The low viscosity liquid state promotes uniform mixing between the base polymer and the conductive filler.
  • ball milling, stirring or other efficient mixing methods can be used to uniformly mix the base polymer and the conductive material together, thereby utilizing The base polymer and conductive filler result in a well-mixed composite.
  • the volume percentage concentration of the conductive filler is 70%.
  • the bipolar plate according to the first embodiment of the present invention has both the advantages of the bipolar plate made only of the metal material and the bipolar plate made only of the composite material, and can improve the durability while making it thin enough.
  • the manufacturing method includes the following steps.
  • the metal plate as the base layer 1 is made of the metal material; and the base polymer and the conductive filler are respectively selected according to the needs, so that the base polymer and the conductive filler are in a predetermined volume percentage concentration (for example, the volume of the conductive filler).
  • the percentage concentration is 70%) uniformly mixed to obtain a composite material, and the filler layer 2 is formed by using the composite material.
  • the two layers of filler layers 2 and the base layer 1 are rolled by the rolling device as shown in FIG.
  • the processing temperature and the temperature of each rolling roll can be determined according to the type of the base polymer, and specifically, the temperature can be controlled by heating or cooling the rolls during the rolling process.
  • a large number of semi-finished products of bipolar plates can be continuously processed, which is beneficial to large-scale industrial production.
  • the semi-finished product is formed into a finished bipolar plate having a predetermined geometric shape, and the above-mentioned geometric shape can be determined in consideration of the structure and size of the fuel cell to which the bipolar plate is applied.
  • the structure of the bipolar plate according to the second embodiment of the present invention is different from that of the bipolar plate according to the first embodiment of the present invention.
  • the base layer 1 is a metal mesh made of a metal material
  • the bipolar plate includes only one filler layer 2 , and the filler layer 2 is attached and fixed to one side of the base layer 1 , so that the base layer 1 and the filler layer 2 are stacked together in the thickness direction T.
  • the metal mesh As the base layer 1, since the metal mesh has sufficient adhesion, it is not necessary to roughen the metal mesh. In order to prevent the side of the metal mesh not attached with the filler layer 2 from being corroded in contact with a coolant (such as water), etc., thereby affecting the durability of the entire bipolar plate, it is preferable to use a corrosion-resistant metal material to make the metal mesh, or to make the metal mesh The mesh is treated for corrosion resistance.
  • the bipolar plate according to the second embodiment of the present invention can be formed using a similar manufacturing method to the bipolar plate according to the first embodiment of the present invention, and has the same characteristics as the first embodiment. Effect.
  • the present invention also provides a proton exchange membrane fuel cell, which adopts the bipolar plate with the above structure.
  • the thickness of the bipolar plate including the base layer 1 can be sufficiently thin. It should be understood that D1>200 ⁇ m can also be made if required.
  • the thickness D2 of the filler layer 2 satisfies the following relationship: 1 ⁇ m ⁇ D2 ⁇ 100 ⁇ m, so that the thickness of the bipolar plate including the filler layer 2 can be made thin enough to prevent pinholes in the filler layer 2 from causing damage to the base layer 1 . Undesirable corrosion occurs. D2>100 ⁇ m can also be made if required.
  • volume percentage concentration of the conductive filler in the filler layer 2 is described as 70% in the above specific embodiment, the present invention is not limited to this. As long as the volume percentage concentration of the conductive filler in the filler layer 2 is greater than or equal to 70%, the filler layer 2 can have better conductivity. Further preferably, in the filler layer 2, the volume percentage concentration of the conductive filler is greater than or equal to 80%.
  • bipolar plates according to the present invention are described in the above specific embodiments for use in proton exchange membrane fuel cells, it should be understood that the bipolar plates according to the present invention can also be used in other fuel cells.

Abstract

Provided is a bipolar plate, comprising: a base layer (1) made of a metal material; and a filler layer (2) made of a composite material formed by mixing a base polymer and a conductive filler, wherein the filler layer (2) is fixed to the base layer (1) in a manner of extending across one side surface or two side surfaces of the base layer (1). In this way, the machining performance and structural strength of the whole bipolar plate are improved, so that the whole bipolar plate can be manufactured to be thin enough, and the durability of the whole bipolar plate is effectively improved. Also provided are a manufacturing method for the bipolar plate and a proton exchange membrane fuel cell comprising the bipolar plate.

Description

双极板及其制造方法以及质子交换膜燃料电池Bipolar plate, method for making the same, and proton exchange membrane fuel cell 技术领域technical field
本发明涉及燃料电池领域，更特别地涉及一种用于燃料电池的双极板及其制造方法，以及包括该双极板的质子交换膜燃料电池。The present invention relates to the field of fuel cells, and more particularly, to a bipolar plate for a fuel cell and a method for manufacturing the same, and a proton exchange membrane fuel cell including the bipolar plate.
背景技术Background technique
现有的质子交换膜燃料电池(PEMFC)包括双极板、阳极、阴极和质子交换膜。双极板通常具有如下功能：在电池内分配氢气和空气；在电池堆中分隔各个电池单元；支持电池内的水管理；作为从电池到负载的导电路径；以及支持电池的热管理(冷却和加热)。因此，首先，双极板需要具有良好的导电导热性能、良好的加工成型能力以及一定的疏水性能；其次，由于双极板工作在酸性条件下，因此双极板还应当具有耐腐蚀性；再次，为了提高能量密度，双极板应当尽可能地薄。在现有技术中采用不同的材料来制造双极板，具体如下。Existing proton exchange membrane fuel cells (PEMFCs) include bipolar plates, anodes, cathodes, and proton exchange membranes. Bipolar plates typically serve the following functions: distribute hydrogen and air within the cell; separate individual cells in the stack; support water management within the cell; serve as a conductive path from the cell to the load; and support the thermal management of the cell (cooling and heating). Therefore, first of all, the bipolar plate needs to have good electrical and thermal conductivity, good processing and forming ability, and certain hydrophobic properties; secondly, since the bipolar plate works under acidic conditions, the bipolar plate should also have corrosion resistance; again; , in order to increase the energy density, the bipolar plate should be as thin as possible. Different materials are used to manufacture bipolar plates in the prior art, as follows.
第一种材料为各种石墨材料。石墨材料具有良好的耐久性，但是由于其机械性能不良(强度低而且韧性差)，因而由石墨材料制成的双极板难以制造得足够薄。The first material is various graphite materials. Graphite materials have good durability, but bipolar plates made of graphite materials are difficult to make sufficiently thin due to their poor mechanical properties (low strength and poor toughness).
第二种材料为金属材料。由于金属材料的机械性能好，因此由金属材料制成的双极板可以很薄，而且金属材料如不锈钢可以有很好的冷变形成型性能，适合大批量的快速生产。但是除了诸如金、铂、铱等贵金属之外，其它金属的耐腐蚀性不足。不锈钢虽然有很好的耐腐蚀性能，但其耐腐蚀性能是因为在表面形成高铬氧化膜，该氧化膜的电导率低，双极板与气体扩散层(GDL)的接触电阻增大，使燃料电池的电阻损耗加大。为了提高耐腐蚀性同时与保持良好的表面电导率，通常在金属材料的表面形成具有良好耐腐蚀 性的涂层。但是表面涂层增加了双极板的成本，而且如果涂层不是完全致密，在使用过程中基体金属离子就有可能污染燃料电池的膜电极从而使燃料电池性能衰退，因此这种双极板的耐久性往往无法与由石墨材料制成的双极板的耐久性相比。The second material is a metallic material. Due to the good mechanical properties of metal materials, bipolar plates made of metal materials can be very thin, and metal materials such as stainless steel can have good cold deformation forming properties, which are suitable for rapid production in large quantities. However, with the exception of noble metals such as gold, platinum, iridium, etc., the corrosion resistance of other metals is insufficient. Although stainless steel has good corrosion resistance, its corrosion resistance is due to the formation of a high chromium oxide film on the surface. The conductivity of the oxide film is low, and the contact resistance between the bipolar plate and the gas diffusion layer (GDL) increases. The resistance loss of the fuel cell increases. In order to improve corrosion resistance while maintaining good surface conductivity, a coating with good corrosion resistance is usually formed on the surface of metal materials. However, the surface coating increases the cost of the bipolar plate, and if the coating is not completely dense, the base metal ions may contaminate the membrane electrode of the fuel cell during use, thereby deteriorating the performance of the fuel cell. The durability is often not comparable to that of bipolar plates made of graphite materials.
第三种材料为复合材料。复合材料是基础聚合物与导电导热填料(例如石墨，纳米碳管等)的混合物。虽然与由金属材料制成的双极板相比，耐腐蚀性改进，但由于非导电或低导电率的高分子相的存在，复合材料的导电导热性能是限制其使用的瓶颈。复合材料的导电导热性能取决于导电导热填料的体积百分比浓度，高的导电导热填料的体积百分比浓度可以增加导电导热性能，但同时机械性能就下降，因而如何解决复合材料的导电导热性能，同时保持足够的机械强度是复合材料双极板的关键之一。The third material is a composite material. Composite materials are mixtures of base polymers with electrically and thermally conductive fillers (eg, graphite, carbon nanotubes, etc.). Although the corrosion resistance is improved compared to bipolar plates made of metallic materials, the electrical and thermal conductivity of composites is a bottleneck limiting their use due to the presence of non-conductive or low-conductivity polymer phases. The electrical and thermal conductivity of composite materials depends on the volume percentage concentration of electrical and thermal conductive fillers. A high volume percentage concentration of electrical and thermal conductive fillers can increase electrical and thermal conductivity, but at the same time, mechanical properties decrease. Therefore, how to solve the electrical and thermal conductivity of composite materials while maintaining Sufficient mechanical strength is one of the keys to composite bipolar plates.
发明内容SUMMARY OF THE INVENTION
为了克服上述现有技术的缺陷而做出了本发明。本发明的一个目的在于提供一种新的双极板及其制造方法，该双极板具有较佳的耐久性的同时能够被制造得足够薄。本发明的另一个目的在于提供包括上述双极板的质子交换膜燃料电池。The present invention has been made to overcome the above-mentioned deficiencies of the prior art. An object of the present invention is to provide a new bipolar plate and a method for manufacturing the same, which has better durability and can be made thin enough. Another object of the present invention is to provide a proton exchange membrane fuel cell including the above bipolar plate.
为了实现上述发明目的，本发明采用如下的技术方案。In order to achieve the above purpose of the invention, the present invention adopts the following technical solutions.
本发明提供了一种如下的双极板，所述双极板用于燃料电池并且包括：The present invention provides a bipolar plate for use in a fuel cell and comprising:
基层，所述基层由金属材料制成；以及a base layer made of a metallic material; and
填料层，所述填料层由基础聚合物和导电填料混合而成的复合材料制成，所述填料层以遍及所述基层的一侧面或两侧面的方式固定于所述基层。A filler layer, the filler layer is made of a composite material mixed with a base polymer and a conductive filler, and the filler layer is fixed to the base layer in a manner of covering one side or both sides of the base layer.
优选地，在所述填料层中，所述导电填料的体积百分比浓度为70％以上。Preferably, in the filler layer, the volume percentage concentration of the conductive filler is more than 70%.
更优选地，所述基础聚合物包括从以下热塑性材料中选择的至少一种：PP、PVF、PVDF、PTFE、PCTFE、ETFE、PA、PPA、PPS、LCP、PEK、PEEK、PC、PPE、PSU、PESU、PEI；或者More preferably, the base polymer comprises at least one selected from the following thermoplastic materials: PP, PVF, PVDF, PTFE, PCTFE, ETFE, PA, PPA, PPS, LCP, PEK, PEEK, PC, PPE, PSU , PESU, PEI; or
所述基础聚合物包括从以下热固性材料中选择的至少一种：酚醛树脂、环氧树脂、三聚氰胺树脂、聚酰亚胺、不饱和聚酯树脂、聚酰胺酰亚胺；或者The base polymer includes at least one selected from the following thermosetting materials: phenolic resin, epoxy resin, melamine resin, polyimide, unsaturated polyester resin, polyamideimide; or
所述基础聚合物包括从以下橡胶中选择的至少一种：FKM、FFKM、EPDM、HNBR、CR、IIR、CSM、FVMQ。The base polymer includes at least one selected from the following rubbers: FKM, FFKM, EPDM, HNBR, CR, IIR, CSM, FVMQ.
更优选地，所述导电填料为从以下材料中选择的至少一种：炭黑、石墨、碳纤维、纳米碳管、石墨烯、陶瓷和金属颗粒。More preferably, the conductive filler is at least one selected from the following materials: carbon black, graphite, carbon fiber, carbon nanotube, graphene, ceramic and metal particles.
更优选地，所述基层的厚度D1和所述填料层的厚度D2满足以下关系：20μm≤D1，并且1μm≤D2≤100μm。More preferably, the thickness D1 of the base layer and the thickness D2 of the filler layer satisfy the following relationship: 20 μm≦D1, and 1 μm≦D2≦100 μm.
更优选地，所述基层为金属板或金属网，并且所述金属材料的伸长率大于20％。More preferably, the base layer is a metal plate or a metal mesh, and the elongation of the metal material is greater than 20%.
更优选地，所述金属材料为从以下材料中选择的至少一种：低碳钢、不锈钢、铜、铜合金、铝、铝合金。More preferably, the metal material is at least one selected from the following materials: low carbon steel, stainless steel, copper, copper alloy, aluminum, aluminum alloy.
更优选地，所述基层的表面进行耐腐蚀处理和/或粗糙化处理。More preferably, the surface of the base layer is subjected to anti-corrosion treatment and/or roughening treatment.
本发明还提供了一种根据以上技术方案中任意一项技术方案所述的双极板的制造方法，所述制造方法包括如下步骤：The present invention also provides a method for manufacturing a bipolar plate according to any one of the above technical solutions, the manufacturing method comprising the following steps:
提供所述金属材料制成所述基层；providing the metal material to make the base layer;
使所述基础聚合物和所述导电填料均匀混合得到所述复合材料，利用该复合材料制成所述填料层；uniformly mixing the base polymer and the conductive filler to obtain the composite material, and using the composite material to make the filler layer;
利用辊扎加工，使所述填料层以遍及所述基层的一侧面或两侧面的方式将所述填料层固定于所述基层，形成半成品；以及Using rolling processing, the filler layer is fixed to the base layer in a manner of covering one side or both sides of the base layer to form a semi-finished product; and
将所述半成品成型为具有预定几何形状的双极板。The semi-finished product is formed into a bipolar plate having a predetermined geometry.
优选地，在使所述基础聚合物和所述导电填料均匀混合得到复合材料之前，将所述基础聚合物形成为粉末状态或液体状态。Preferably, before uniformly mixing the base polymer and the conductive filler to obtain a composite material, the base polymer is formed into a powder state or a liquid state.
更优选地，利用球磨混合或搅拌混合所述基础聚合物和所述导电材料，以得到所述复合材料。More preferably, the base polymer and the conductive material are mixed or mixed with a ball mill to obtain the composite material.
本发明还提供了一种如下的质子交换膜燃料电池，其包括以上技术方案中任意一项技术方案所述的双极板。The present invention also provides the following proton exchange membrane fuel cell, which includes the bipolar plate described in any one of the above technical solutions.
通过采用上述技术方案，本发明提供了一种双极板及其制造方法。在该双极板中包括固定在一起的基层和填料层，基层由金属材料制成，填料层由基础聚合物和导电填料混合的材料制成。填料层以遍及基层的一侧面或两侧面的方式固定于基层。这样，由于该双极板以金属材料制成的基层作为骨架，改善了整个双极板的机械加工性能和结构强度，因而能够使得整个双极板被制造得足够薄；另外，该双极板还包括由基础聚合物和导电填料混合得到的复合材料制成的填料层，填料层的耐腐蚀性较强，从而使得整个双极板的耐久性得到了有效改善。By adopting the above technical solutions, the present invention provides a bipolar plate and a manufacturing method thereof. The bipolar plate includes a base layer and a filler layer fixed together, the base layer is made of a metal material, and the filler layer is made of a mixed material of a base polymer and a conductive filler. The filler layer is fixed to the base layer in a manner of covering one side or both sides of the base layer. In this way, since the bipolar plate uses the base layer made of metal material as the skeleton, the machinability and structural strength of the entire bipolar plate are improved, so that the entire bipolar plate can be made thin enough; in addition, the bipolar plate It also includes a filler layer made of a composite material obtained by mixing the base polymer and the conductive filler, and the filler layer has strong corrosion resistance, so that the durability of the entire bipolar plate is effectively improved.
附图说明Description of drawings
图1是示出了根据本发明的第一实施方式的双极板的结构的示意图。FIG. 1 is a schematic diagram showing the structure of a bipolar plate according to a first embodiment of the present invention.
图2是示出了制造图1中所示的双极板的半成品的辊扎装置的局部结构示意图。FIG. 2 is a schematic diagram showing a partial structure of a rolling device for manufacturing the semi-finished product of the bipolar plate shown in FIG. 1 .
图3是示出了根据本发明的第二实施方式的双极板的结构的示意图。FIG. 3 is a schematic diagram showing the structure of a bipolar plate according to a second embodiment of the present invention.
附图标记说明Description of reference numerals
1基层 2填料层1 base layer 2 filler layer
T厚度方向 D1基层的厚度 D2填料层的厚度。T thickness direction D1 thickness of base layer D2 thickness of filler layer.
具体实施方式Detailed ways
根据本发明的双极板可以用于燃料电池，该双极板在燃料电池中发挥的功能与背景技术中说明的现有的双极板在燃料电池中发挥的功能相同。以下 参照附图说明本发明的示例性实施方式。The bipolar plate according to the present invention can be used in a fuel cell, and the function of the bipolar plate in the fuel cell is the same as that of the conventional bipolar plate described in the background art. Exemplary embodiments of the present invention are described below with reference to the accompanying drawings.
(根据本发明的第一实施方式的双极板的结构及制造方法)(The structure and manufacturing method of the bipolar plate according to the first embodiment of the present invention)
如图1所示，根据本发明的第一实施方式的双极板包括固定在一起的基层1和两层填料层2。As shown in FIG. 1 , the bipolar plate according to the first embodiment of the present invention includes a base layer 1 and two filler layers 2 fixed together.
在本实施方式中，基层1为由金属材料制成的金属板且位于两层填料层2之间，使得基层1与两层填料层2在厚度方向T上层叠在一起。基层1的厚度D1为50μm。这样，利用金属的机械加工性能优良的特点，能够将基层1制造得足够薄；并且在双极板被制造得非常薄的情况下，基层1能够增强双极板的强度，起到骨架的作用。In this embodiment, the base layer 1 is a metal plate made of a metal material and is located between the two filler layers 2 , so that the base layer 1 and the two filler layers 2 are stacked together in the thickness direction T. The thickness D1 of the base layer 1 was 50 μm. In this way, the base layer 1 can be made thin enough by taking advantage of the excellent machinability of metal; and when the bipolar plate is made very thin, the base layer 1 can enhance the strength of the bipolar plate and play the role of a skeleton .
为了提高双极板的机械加工性能，金属材料的伸长率优选大于20％。因此，制造基层1的金属材料可以为从以下材料中选择的至少一种材料：低碳钢、不锈钢、铜、铜合金、铝、铝合金。在采用低碳钢的情况下，低碳钢优选地经过耐腐蚀处理。In order to improve the machinability of the bipolar plate, the elongation of the metal material is preferably greater than 20%. Therefore, the metal material for making the base layer 1 may be at least one material selected from the following materials: low carbon steel, stainless steel, copper, copper alloy, aluminum, aluminum alloy. In the case of low carbon steel, the low carbon steel is preferably treated for corrosion resistance.
为了改善作为基层1的金属板对复合材料的附着能力，对金属板进行粗糙化处理。可以通过轧辊加工在金属板的表面形成凹凸或者纹理，也可以通过化学处理或者喷砂处理或者通过激光粗糙化或纹理化在金属板的表面完成粗糙化处理。In order to improve the adhesion of the metal plate as the base layer 1 to the composite material, the metal plate is roughened. Concavities and convexities or textures can be formed on the surface of the metal plate by rolling, and the surface of the metal plate can also be roughened by chemical treatment or sandblasting, or by laser roughening or texturing.
在本实施方式中，填料层2由基础聚合物和导电填料混合制成的复合材料制成，基础聚合物用于使复合材料中的各种物质接合在一起，导电填料用于实现复合材料的导电功能。两层填料层2夹着基层1，各填料层2以遍及基层1的对应侧面的方式附着固定于基层1。为了避免金属材料制成的基层1受到不期望的腐蚀以及金属离子扩散到电池中使得MEA(膜电极组合体)性能劣化，可以使填料层2具有足够的厚度，在本实施方式中填料层2的厚度D2为20μm。In this embodiment, the filler layer 2 is made of a composite material made by mixing a base polymer and a conductive filler, the base polymer is used to bond various substances in the composite material together, and the conductive filler is used to realize the Conductive function. The two layers of filler layers 2 sandwich the base layer 1 , and each filler layer 2 is attached and fixed to the base layer 1 in a manner of covering the corresponding side surfaces of the base layer 1 . In order to prevent the base layer 1 made of metal material from being undesiredly corroded and the diffusion of metal ions into the battery to degrade the performance of the MEA (membrane electrode assembly), the filler layer 2 can be made to have a sufficient thickness. In this embodiment, the filler layer 2 The thickness D2 is 20 μm.
填料层2主要起到提高双极板的耐久性的目的，由于双极板工作在酸性条件下，因而上述基础聚合物优选选择耐酸性非常好的材料。具体地，基础聚合物可以包括从以下热塑性材料中选择的至少一种：PP(聚丙烯)、PVF(聚氟乙烯),PVDF(聚偏氟乙烯),PTFE(聚四氟乙烯),PCTFE(聚三氟氯乙烯),ETFE(乙四氟乙烯)、PA(聚酰胺)、PPA(聚邻苯二甲酰胺)、PPS(聚苯硫醚)、LCP(液晶聚合物)、PEK(聚醚醚酮)、PEEK(聚醚醚酮)、PC(聚碳酸酯)、PPE(聚苯醚)、PSU(聚砜)、PESU(聚醚砜)、PEI(聚醚酰亚胺)；或者基础聚合物可以包括从以下热固性材料中选择的至少一种：酚醛树脂、环氧树脂、三聚氰胺树脂、不饱和聚酯树脂、聚酰亚胺、聚酰胺酰亚胺；或者基础聚合物可以包括从以下橡胶中选择的至少一种：FKM(氟橡胶)、FFKM(全氟醚橡胶)、EPDM(三元乙丙橡胶)、HNBR(氢化丁腈橡胶)、CR(氯丁橡胶)、IIR(丁基橡胶)、CSM(氯磺化聚乙烯橡胶)、FVMQ(氟硅橡胶)。导电填料可以为从以下材料中选择的至少一种：炭黑、石墨、碳纤维、纳米碳管、石墨烯、陶瓷和金属颗粒。The filler layer 2 mainly serves the purpose of improving the durability of the bipolar plate. Since the bipolar plate works under acidic conditions, the above-mentioned base polymer is preferably selected from a material with very good acid resistance. Specifically, the base polymer may include at least one selected from the following thermoplastic materials: PP (polypropylene), PVF (polyvinyl fluoride), PVDF (polyvinylidene fluoride), PTFE (polytetrafluoroethylene), PCTFE ( Polychlorotrifluoroethylene), ETFE (ethylene tetrafluoroethylene), PA (polyamide), PPA (polyphthalamide), PPS (polyphenylene sulfide), LCP (liquid crystal polymer), PEK (polyether) ether ketone), PEEK (polyether ether ketone), PC (polycarbonate), PPE (polyphenylene ether), PSU (polysulfone), PESU (polyethersulfone), PEI (polyetherimide); or base The polymer may comprise at least one selected from the following thermosetting materials: phenolic resin, epoxy resin, melamine resin, unsaturated polyester resin, polyimide, polyamideimide; or the base polymer may comprise from the following At least one selected from the rubber: FKM (Fluoroelastomer), FFKM (Perfluoroether Rubber), EPDM (Ethylene Propylene Diene Monomer), HNBR (Hydrogenated Nitrile Rubber), CR (Neoprene Rubber), IIR (Butyl rubber), CSM (chlorosulfonated polyethylene rubber), FVMQ (fluorosilicone rubber). The conductive filler may be at least one selected from the following materials: carbon black, graphite, carbon fibers, carbon nanotubes, graphene, ceramics, and metal particles.
当选择好基础聚合物和导电材料之后，在使基础聚合物和导电填料均匀混合得到复合材料之前，使基础聚合物形成呈现微细粉末状态或粘度小于预定值的低粘度液体状态，微细粉末状态和低粘度液体状态能够促进基础聚合物和导电填料之间均匀混合。当对基础聚合物和导电材料进行混合时，基于所选择的基础聚合物的种类，可以利用球磨混合、搅拌混合或其它有效率的混合方式使基础聚合物和导电材料均匀混合在一起，从而利用基础聚合物和导电填料得到混合均匀的复合材料。After selecting the base polymer and the conductive material, before uniformly mixing the base polymer and the conductive filler to obtain the composite material, the base polymer is formed into a fine powder state or a low viscosity liquid state with a viscosity less than a predetermined value, the fine powder state and The low viscosity liquid state promotes uniform mixing between the base polymer and the conductive filler. When mixing the base polymer and the conductive material, based on the type of the base polymer selected, ball milling, stirring or other efficient mixing methods can be used to uniformly mix the base polymer and the conductive material together, thereby utilizing The base polymer and conductive filler result in a well-mixed composite.
为了使填料层2具有非常良好的导电性能，在本实施方式的填料层2中，导电填料的体积百分比浓度为70％。In order to make the filler layer 2 have very good electrical conductivity, in the filler layer 2 of this embodiment, the volume percentage concentration of the conductive filler is 70%.
通过具有上述结构，根据本发明的第一实施方式的双极板兼具仅由金属 材料制成的双极板和仅由复合材料制成的双极板两者的优点，能够在提高耐久性的同时制造得足够薄。By having the above-described structure, the bipolar plate according to the first embodiment of the present invention has both the advantages of the bipolar plate made only of the metal material and the bipolar plate made only of the composite material, and can improve the durability while making it thin enough.
以下说明根据本发明的第一实施方式的双极板的制造方法。该制造方法包括如下步骤。A method of manufacturing the bipolar plate according to the first embodiment of the present invention will be described below. The manufacturing method includes the following steps.
首先，根据选择金属材料，利用金属材料制成作为基层1的金属板；并且根据需要分别选择基础聚合物和导电填料，使基础聚合物和导电填料以预定的体积百分比浓度(例如导电填料的体积百分比浓度为70％)均匀混合得到复合材料，利用该复合材料形成填料层2。First, according to the selection of the metal material, the metal plate as the base layer 1 is made of the metal material; and the base polymer and the conductive filler are respectively selected according to the needs, so that the base polymer and the conductive filler are in a predetermined volume percentage concentration (for example, the volume of the conductive filler). The percentage concentration is 70%) uniformly mixed to obtain a composite material, and the filler layer 2 is formed by using the composite material.
然后，利用如图2所示的辊扎装置对两层填料层2和基层1(金属板)进行辊扎加工，使填料层2以遍及基层1的两侧面的方式附着固定于基层1，此时形成了双极板的半成品。在进行辊扎加工过程中，可以根据基础聚合物的类型决定加工温度和各扎辊的温度，具体地可以在辊扎过程中对辊进行加热或冷却来控制温度。利用该辊扎加工，能够持续加工形成大量的双极板的半成品，从而有利于大规模工业生产。Then, the two layers of filler layers 2 and the base layer 1 (metal plate) are rolled by the rolling device as shown in FIG. When the semi-finished product of the bipolar plate is formed. During the rolling process, the processing temperature and the temperature of each rolling roll can be determined according to the type of the base polymer, and specifically, the temperature can be controlled by heating or cooling the rolls during the rolling process. Using this rolling process, a large number of semi-finished products of bipolar plates can be continuously processed, which is beneficial to large-scale industrial production.
最后，将半成品成型为具有预定几何形状的成品双极板，上述几何形状可以考虑双极板所应用的燃料电池的结构和尺寸等来决定。Finally, the semi-finished product is formed into a finished bipolar plate having a predetermined geometric shape, and the above-mentioned geometric shape can be determined in consideration of the structure and size of the fuel cell to which the bipolar plate is applied.
(根据本发明的第二实施方式的双极板的结构)(Structure of the bipolar plate according to the second embodiment of the present invention)
根据本发明的第二实施方式的双极板的结构与根据本发明的第一实施方式的双极板的结构不同，在本实施方式中，基层1为由金属材料制成的金属网，并且双极板仅包括一层填料层2，填料层2附着固定于基层1的一个侧面，使得基层1与填料层2在厚度方向T上层叠在一起。The structure of the bipolar plate according to the second embodiment of the present invention is different from that of the bipolar plate according to the first embodiment of the present invention. In this embodiment, the base layer 1 is a metal mesh made of a metal material, and The bipolar plate includes only one filler layer 2 , and the filler layer 2 is attached and fixed to one side of the base layer 1 , so that the base layer 1 and the filler layer 2 are stacked together in the thickness direction T.
以金属网作为基层1，由于金属网具有足够的附着性，因此不需要对金属网进行粗糙化处理。为了避免金属网未附着有填料层2的那侧与冷却剂(例如水)等接触受到腐蚀，从而影响整个双极板的耐久性，优选利用耐腐蚀的金属材料制成金属网，或者对金属网进行耐腐蚀处理。Using the metal mesh as the base layer 1, since the metal mesh has sufficient adhesion, it is not necessary to roughen the metal mesh. In order to prevent the side of the metal mesh not attached with the filler layer 2 from being corroded in contact with a coolant (such as water), etc., thereby affecting the durability of the entire bipolar plate, it is preferable to use a corrosion-resistant metal material to make the metal mesh, or to make the metal mesh The mesh is treated for corrosion resistance.
除了以上说明的不同之处，根据本发明的第二实施方式的双极板可以采用与根据本发明的第一实施方式的双极板类似的制造方法形成，并且具有与第一实施方式同样的效果。Except for the differences explained above, the bipolar plate according to the second embodiment of the present invention can be formed using a similar manufacturing method to the bipolar plate according to the first embodiment of the present invention, and has the same characteristics as the first embodiment. Effect.
此外，本发明还提供了一种质子交换膜燃料电池，该质子交换膜燃料电池采用了具有如上结构的双极板。In addition, the present invention also provides a proton exchange membrane fuel cell, which adopts the bipolar plate with the above structure.
当然，本发明不限于上述实施方式，本领域技术人员在本发明的教导下可以对本发明的上述实施方式做出各种变型，而不脱离本发明的范围。另外，进行以下说明。Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can make various modifications to the above-mentioned embodiments of the present invention under the teaching of the present invention without departing from the scope of the present invention. In addition, the following description will be made.
(i)需要说明的是，在根据本发明的双极板中，由于采用了金属板或金属网作为基层1，因而在改善了双极板的结构强度的同时改善了面内导电性。(i) It should be noted that, in the bipolar plate according to the present invention, since a metal plate or a metal mesh is used as the base layer 1, the structural strength of the bipolar plate is improved and the in-plane conductivity is improved.
(ii)虽然在以上的具体实施方式中说明了基层1的厚度D1和填料层2的厚度D2采用的具体数值，但是本发明不限于此。(ii) Although the specific numerical values adopted for the thickness D1 of the base layer 1 and the thickness D2 of the filler layer 2 have been described in the above specific embodiments, the present invention is not limited thereto.
优选地，20μm≤D1≤200μm，这样能够使包括该基层1的双极板的厚度足够薄。应当理解，在需要的情况下，也可以使得D1>200μm。Preferably, 20 μm≦D1≦200 μm, so that the thickness of the bipolar plate including the base layer 1 can be sufficiently thin. It should be understood that D1>200 μm can also be made if required.
优选地，填料层2的厚度D2满足以下关系1μm≤D2≤100μm，这样能够在使包括该填料层2的双极板的厚度足够薄的情况下，防止填料层2产生针孔导致对基层1产生不期望的腐蚀。在需要的情况下，也可以使得D2>100μm。Preferably, the thickness D2 of the filler layer 2 satisfies the following relationship: 1 μm≦D2≦100 μm, so that the thickness of the bipolar plate including the filler layer 2 can be made thin enough to prevent pinholes in the filler layer 2 from causing damage to the base layer 1 . Undesirable corrosion occurs. D2>100μm can also be made if required.
(iii)虽然在以上的具体实施方式中说明了填料层2中的导电填料的体积百分比浓度为70％，但是本发明不限于此。只要填料层2中的导电填料的体积百分比浓度大于或等于70％，都可以使填料层2具有较佳的导电性。进一步优选地，在填料层2中，导电填料的体积百分比浓度大于或等于80％。(iii) Although the volume percentage concentration of the conductive filler in the filler layer 2 is described as 70% in the above specific embodiment, the present invention is not limited to this. As long as the volume percentage concentration of the conductive filler in the filler layer 2 is greater than or equal to 70%, the filler layer 2 can have better conductivity. Further preferably, in the filler layer 2, the volume percentage concentration of the conductive filler is greater than or equal to 80%.
(iv)虽然在以上的具体实施方式中说明了根据本发明的双极板用于质子交换膜燃料电池，但是应当理解，根据本发明的双极板还可以用于其它的燃料电池。(iv) Although the bipolar plates according to the present invention are described in the above specific embodiments for use in proton exchange membrane fuel cells, it should be understood that the bipolar plates according to the present invention can also be used in other fuel cells.

Claims (12)

  1. 一种双极板，所述双极板用于燃料电池并且包括：A bipolar plate for a fuel cell and comprising:
    基层(1)，所述基层(1)由金属材料制成；以及a base layer (1), the base layer (1) being made of a metallic material; and
    填料层(2)，所述填料层(2)由基础聚合物和导电填料混合而成的复合材料制成，所述填料层(2)以遍及所述基层(1)的一侧面或两侧面的方式固定于所述基层(1)。A filler layer (2), the filler layer (2) is made of a composite material mixed with a base polymer and a conductive filler, and the filler layer (2) is spread over one side or both sides of the base layer (1) is fixed to the base layer (1).
  2. 根据权利要求1所述的双极板，其特征在于，在所述填料层(2)中，所述导电填料的体积百分比浓度为70％以上。The bipolar plate according to claim 1, characterized in that, in the filler layer (2), the volume percent concentration of the conductive filler is 70% or more.
  3. 根据权利要求1或2所述的双极板，其特征在于，The bipolar plate according to claim 1 or 2, characterized in that,
    所述基础聚合物包括从以下热塑性材料中选择的至少一种：PP、PVF、PVDF、PTFE、PCTFE、ETFE、PA、PPA、PPS、LCP、PEK、PEEK、PC、PPE、PSU、PESU、PEI；或者The base polymer includes at least one selected from the following thermoplastic materials: PP, PVF, PVDF, PTFE, PCTFE, ETFE, PA, PPA, PPS, LCP, PEK, PEEK, PC, PPE, PSU, PESU, PEI ;or
    所述基础聚合物包括从以下热固性材料中选择的至少一种：酚醛树脂、环氧树脂、三聚氰胺树脂、聚酰亚胺、不饱和聚酯树脂、聚酰胺酰亚胺；或者The base polymer includes at least one selected from the following thermosetting materials: phenolic resin, epoxy resin, melamine resin, polyimide, unsaturated polyester resin, polyamideimide; or
    所述基础聚合物包括从以下橡胶中选择的至少一种：FKM、FFKM、EPDM、HNBR、CR、IIR、CSM、FVMQ。The base polymer includes at least one selected from the following rubbers: FKM, FFKM, EPDM, HNBR, CR, IIR, CSM, FVMQ.
  4. 根据权利要求1至3中任一项所述的双极板，其特征在于，所述导电填料为从以下材料中选择的至少一种：炭黑、石墨、碳纤维、纳米碳管、石墨烯、陶瓷和金属颗粒。The bipolar plate according to any one of claims 1 to 3, wherein the conductive filler is at least one selected from the following materials: carbon black, graphite, carbon fiber, carbon nanotube, graphene, Ceramic and metal particles.
  5. 根据权利要求1至4中任一项所述的双极板，其特征在于，所述基层(1)的厚度D1和所述填料层(2)的厚度D2满足以下关系：20μm≤D1，并且1μm≤D2≤100μm。The bipolar plate according to any one of claims 1 to 4, wherein the thickness D1 of the base layer (1) and the thickness D2 of the filler layer (2) satisfy the following relationship: 20 μm≤D1, and 1μm≤D2≤100μm.
  6. 根据权利要求1至5中任一项所述的双极板，其特征在于，所述基层(1)为金属板或金属网，并且所述金属材料的伸长率大于20％。The bipolar plate according to any one of claims 1 to 5, wherein the base layer (1) is a metal plate or a metal mesh, and the elongation of the metal material is greater than 20%.
  7. 根据权利要求1至5中任一项所述的双极板，其特征在于，所述金属材料为从以下材料中选择的至少一种：低碳钢、不锈钢、铜、铜合金、铝、铝合金。The bipolar plate according to any one of claims 1 to 5, wherein the metal material is at least one selected from the following materials: low carbon steel, stainless steel, copper, copper alloy, aluminum, aluminum alloy.
  8. 根据权利要求1至7中任一项所述双极板，其特征在于，所述基层(1)的表面进行耐腐蚀处理和/或粗糙化处理。The bipolar plate according to any one of claims 1 to 7, characterized in that, the surface of the base layer (1) is subjected to anti-corrosion treatment and/or roughening treatment.
  9. 一种根据权利要求1至8中任一项所述的双极板的制造方法，所述制造方法包括如下步骤：A method of manufacturing a bipolar plate according to any one of claims 1 to 8, the manufacturing method comprising the steps of:
    提供所述金属材料制成所述基层(1)；providing the metal material to make the base layer (1);
    使所述基础聚合物和所述导电填料均匀混合得到所述复合材料，利用该复合材料制成所述填料层(2)；uniformly mixing the base polymer and the conductive filler to obtain the composite material, and using the composite material to make the filler layer (2);
    利用辊扎加工，使所述填料层(2)以遍及所述基层(1)的一侧面或两侧面的方式将所述填料层(2)固定于所述基层(1)，形成半成品；以及Using rolling processing, the filler layer (2) is fixed to the base layer (1) by covering one side or both sides of the base layer (1) to form a semi-finished product; and
    将所述半成品成型为具有预定几何形状的双极板。The semi-finished product is formed into a bipolar plate having a predetermined geometry.
  10. 根据权利要求9所述的制造方法，其特征在于，在使所述基础聚合物和所述导电填料均匀混合得到复合材料之前，将所述基础聚合物形成为粉末状态或液体状态。The production method according to claim 9, wherein the base polymer is formed into a powder state or a liquid state before uniformly mixing the base polymer and the conductive filler to obtain a composite material.
  11. 根据权利要求9或10所述的制造方法，其特征在于，利用球磨混合或搅拌混合所述基础聚合物和所述导电材料，以得到所述复合材料。The manufacturing method according to claim 9 or 10, wherein the base polymer and the conductive material are mixed or mixed with a ball mill to obtain the composite material.
  12. 一种质子交换膜燃料电池，其包括权利要求1至8中任一项所述的双极板。A proton exchange membrane fuel cell comprising the bipolar plate of any one of claims 1 to 8.
PCT/CN2021/071215 2021-01-12 2021-01-12 Bipolar plate and manufacturing method therefor, and proton exchange membrane fuel cell WO2022150953A1 (en)

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