CN219286455U - Multiphase composite polar plate - Google Patents
Multiphase composite polar plate Download PDFInfo
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- CN219286455U CN219286455U CN202222452773.6U CN202222452773U CN219286455U CN 219286455 U CN219286455 U CN 219286455U CN 202222452773 U CN202222452773 U CN 202222452773U CN 219286455 U CN219286455 U CN 219286455U
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- 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
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- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model provides a multiphase composite polar plate, which comprises a first carbon fiber layer, a second carbon fiber layer, a conductive adhesive layer and a resin reinforcing layer; the resin reinforcing layer is arranged in the conductive adhesive layer, and the conductive adhesive layer is arranged between the first carbon fiber layer and the second carbon fiber layer; the first carbon fiber layer and the second carbon fiber layer are uniformly filled with thermosetting resin binders; the resin reinforcing layer and the multiphase composite polar plate have the same flow passage and sealing structure; the thickness of the multiphase composite polar plate is 0.05mm-1.00 mm. The multiphase composite polar plate has excellent electric conduction, heat conduction and corrosion resistance, has long service life at high temperature, and can effectively improve the volume power density and performance of the fuel cell, so that the whole fuel cell has good service performance.
Description
Technical Field
The utility model relates to the technical field of fuel cells, in particular to a multiphase composite polar plate.
Background
The hydrogen fuel cell can directly convert chemical energy in hydrogen and oxygen into electric energy, is not limited by Carnot cycle, has high conversion rate, and is an efficient energy conversion device; meanwhile, the product of the hydrogen fuel cell is only water, is clean and pollution-free, has zero carbon emission and is an ideal new energy carrier. However, at present, two main stream polar plate materials (graphite plates and metal plates) of the hydrogen fuel cell have technical bottlenecks, and popularization and application of the fuel cell in the fields of high power and high volume power density are limited.
Graphite sheet has excellent corrosion resistance, low cost and acceptable production efficiency. However, due to the limitation of the ductility and structural strength of the graphite plates, most graphite bipolar plates are currently thick in the range of 1.6-2.0mm, and the size is thick, so that the volume of the graphite plate galvanic pile is large. Therefore, the graphite plate galvanic pile is mainly suitable for vehicle types with abundant space in vehicles such as traffic buses, logistics heavy trucks and the like. The passenger car has strict requirements on the volume ratio power density of the electric pile, so that the performance of the membrane electrode is improved, and the volume ratio of the bipolar plates in the electric pile is required to be greatly reduced, so that the graphite plate electric pile cannot meet the requirements of the passenger car.
Compared with graphite plates, the metal plates have excellent ductility and structural strength, so that the thickness of the metal plate base material can be reduced to 0.1mm, and the total thickness of the metal bipolar plate is about 0.8mm. However, the metal plate has the defects of poor corrosion resistance, high plating requirement, difficult forming process and the like, and has a high technical barrier in the aspect of metal plate galvanic pile in China at present.
Disclosure of Invention
Based on the problems, on the premise of keeping the thickness of the polar plate substrate thin, the problems of poor corrosion resistance, high forming difficulty, high coating process requirement and the like of the traditional metal polar plate are solved. The thickness of the multiphase composite polar plate can be controlled between 0.05mm and 1.00mm, the requirements of high structural strength, high corrosion resistance, high heat conduction and electrical conductivity, easy processing and the like can be met simultaneously, raw materials are easy to obtain, the price is low, and the multiphase composite polar plate is suitable for mass production.
In order to achieve the above objective, an embodiment of the present utility model provides a multiphase composite electrode plate, including a first carbon fiber layer, a second carbon fiber layer, a conductive adhesive layer and a resin reinforcing layer; the resin reinforcing layer is arranged in the conductive adhesive layer, and the conductive adhesive layer is arranged between the first carbon fiber layer and the second carbon fiber layer;
the first carbon fiber layer and the second carbon fiber layer are uniformly filled with thermosetting resin binders; the resin reinforcing layer and the multiphase composite polar plate have the same flow passage and sealing structure;
the thickness of the multiphase composite polar plate is 0.05mm-1.00mm, and the working temperature of the multiphase composite polar plate is-50 ℃ to 200 ℃.
As a preferred embodiment, the first carbon fiber layer or the second carbon fiber layer is a carbon fiber layer pretreated by impregnation.
As a preferred embodiment, the first carbon fiber layer or the second carbon fiber layer is subjected to impregnation pretreatment by: and (3) placing the first carbon fiber layer or the second carbon fiber layer in 10-50wt% of thermosetting resin binder for impregnation treatment, taking out the first carbon fiber layer or the second carbon fiber layer after the impregnation treatment, and cleaning the surface with deionized water to obtain the first carbon fiber layer or the second carbon fiber layer.
As a preferred embodiment, the thermosetting resin binder is one or a mixture of at least two of epoxy resin, vinyl ester, phenolic or bismaleimide.
In a preferred embodiment, the conditions of the dipping treatment are vacuum-pumping and dipping at room temperature for 0.2 to 3.0 hours, and the number of times of dipping is 1.
As a preferable embodiment, the thickness of the first carbon fiber layer is 0.02mm to 0.5mm; the thickness of the second carbon fiber layer is 0.02 mm-0.5 mm. The thicknesses of the first carbon fiber layer and the second carbon fiber layer can be selected according to the actual use requirement and the design requirement of the multiphase composite polar plate.
As a preferred embodiment, the thickness of the conductive adhesive layer between the first carbon fiber layer and the resin reinforcing layer is 0.01mm to 0.2mm; the thickness of the conductive adhesive layer between the second carbon fiber layer and the resin reinforcing layer is 0.01-0.2 mm; and the thickness of the conductive adhesive layer between the first carbon fiber layer and the resin reinforcing layer is equal to the thickness of the conductive adhesive layer between the second carbon fiber layer and the resin reinforcing layer.
As a preferable embodiment, the use temperature of the resin reinforcing layer is more than 200 ℃, and the structural tensile strength is more than or equal to 500kPa. In the present application, the structural strength of the resin reinforcing layer is superior to that of a stainless steel plate of the same thickness, but the external dimensions of the resin reinforcing layer are smaller than those of the first carbon fiber layer and the second carbon fiber layer.
As a preferred embodiment, the resin reinforcing layer has an external dimension smaller than external dimensions of the first carbon fiber layer and the second carbon fiber layer; and the distance between the edge of the resin reinforcing layer and the edge of the first carbon fiber layer or the distance between the edge of the resin reinforcing layer and the edge of the second carbon fiber layer is 0.05 mm-5 mm.
In a preferred embodiment, the thickness of the resin reinforcing layer is 0.01mm to 0.8mm.
As a preferred embodiment, the resin reinforcing layer is a polyamide 66 resin reinforcing layer, an ABS resin reinforcing layer, or a PARMAX resin reinforcing layer.
As a preferred embodiment, the resin reinforcing layer is prepared by injection molding or 3D printing.
In a preferred embodiment, the conductive adhesive layer is a thermoplastic conductive adhesive layer or a thermosetting conductive adhesive layer.
In this application, set up first carbon fiber layer and second carbon fiber layer in the both sides outermost of heterogeneous composite polar plate respectively, can play electric conduction, heat conduction, prevent the effect that other structural layers corrode in the polar plate. The conductive adhesive layer is used for bonding the first carbon fiber layer, the second carbon fiber layer and the resin reinforcing layer, sealing the resin reinforcing layer inside the multiphase composite polar plate, and conducting electrons between the first carbon fiber layer and the second carbon fiber layer.
The preparation method of the multiphase composite polar plate comprises the following steps:
s1, coating first conductive adhesive on two opposite sides of a resin reinforcing layer, the side surface of a first carbon fiber layer close to the resin reinforcing layer and the side surface of a second carbon fiber layer close to the resin reinforcing layer respectively, and then bonding the first carbon fiber layer and the second carbon fiber layer on two opposite sides of the resin reinforcing layer coated with the first conductive adhesive respectively to obtain a composite structure;
s2, filling gaps in the composite structure in the step S1 by using a second conductive adhesive to obtain a filled composite structure; the first conductive adhesive and the second conductive adhesive form a conductive adhesive layer, and the conductive adhesive layer is a conductive adhesive layer with a closed loop;
s3, carrying out hot press solidification on the filled composite structure in the step S2 to obtain the multiphase composite polar plate with polar plate appearance and runner characteristics.
In step S1, the coating thickness of the first conductive adhesive is preferably 0.005mm to 0.1mm.
The first carbon fiber layer or the second carbon fiber layer is subjected to impregnation pretreatment by the following method: and (3) placing the first carbon fiber layer or the second carbon fiber layer in 10-50wt% of thermosetting resin binder for impregnation treatment, taking out the first carbon fiber layer or the second carbon fiber layer after the impregnation treatment, and cleaning the surface with deionized water to obtain the first carbon fiber layer or the second carbon fiber layer.
The thermosetting resin binder is one or a mixture of at least two of epoxy resin, vinyl ester, phenolic aldehyde or bismaleimide.
The conditions of the dipping treatment are that the dipping is carried out for 0.2 to 3.0 hours at room temperature under the condition of vacuumizing, and the dipping times are 1 time.
In the step S3 of the process,
the hot press curing conditions are that the hot press curing is carried out for 0.1 to 4.0 hours at the temperature of between 120 and 170 ℃ under the pressure of between 1 and 30 MPa.
Contact resistance of the multiphase composite polar plate<10mOhm·cm 2 The conductivity is 100S/cm-120S/cm, and the bending strength is high>50MPa, air tightness<2*10 -6 cm 3 ·s -1 ·cm -2 Corrosion current<1uA/cm 2 Meets the DOE standard.
The thickness of the multiphase composite polar plate provided by the embodiment of the utility model can be less than 0.1mm, and the thickness of the base material is far less than that of a graphite polar plate and even better than that of a metal polar plate. The outermost layer of the multiphase composite polar plate is a carbon-based material polar plate with far-reaching corrosion resistance, no plating layer is needed, raw materials are easy to obtain, the price is low, the preparation and molding process is simple, and the multiphase composite polar plate is suitable for large-scale batch production. The resin reinforcing layer is sealed in the multiphase composite polar plate, so that the structural strength of the multiphase composite polar plate is effectively improved. The carbon fiber layer and the resin reinforcing layer are simple in forming process and excellent in air tightness, the air tightness of the whole composite pole plate can be effectively guaranteed, the air tightness failure of the whole pole plate caused by tiny breakage of similar metal pole plates in the stamping forming process can be avoided, the operation difficulty of stamping forming of the composite pole plate is effectively reduced, and the yield of the composite pole plate is greatly improved. The multiphase composite polar plate can work at the temperature of-50 ℃ to 200 ℃, has excellent electric conduction, heat conduction and corrosion resistance, has longer durable service life at high temperature, can be applied to a fuel cell, and can effectively improve the volume power density and the performance of the fuel cell, so that the whole fuel cell has better service performance.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a multiphase composite plate according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a multiphase composite electrode plate according to another embodiment of the present utility model.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, if directional indications (such as up, down, left, right, front, back, top, bottom … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
At present, compared with a graphite plate, the metal plate has excellent ductility and structural strength, so that the thickness of the metal plate base material can be reduced to 0.1mm, and the total thickness of the metal bipolar plate is about 0.8mm. However, the metal plate has the defects of poor corrosion resistance, high plating requirement, difficult forming process and the like, and has a high technical barrier in the aspect of metal plate galvanic pile in China at present. Based on the above, the application provides a multiphase composite polar plate, and a preparation method and application thereof, so as to solve the technical problems.
Specifically, as shown in fig. 1, an embodiment of the present utility model provides a multiphase composite electrode plate, which includes a first carbon fiber layer 10, a second carbon fiber layer 20, a conductive adhesive layer 30 and a resin reinforcing layer 40; the resin reinforcing layer 40 is disposed in the conductive adhesive layer 30, and the conductive adhesive layer 30 is disposed between the first carbon fiber layer 10 and the second carbon fiber layer 20;
the first carbon fiber layer 10 and the second carbon fiber layer 20 are uniformly filled with a thermosetting resin binder 50; the resin reinforcing layer 40 and the multiphase composite electrode plate have the same flow passage and sealing structure;
the thickness of the multiphase composite polar plate is 0.05mm-1.00mm, and the working temperature of the multiphase composite polar plate is-50 ℃ to 200 ℃.
In the embodiment of fig. 1, the first carbon fiber layer 10 and the second carbon fiber layer 20 have the same thickness. It is understood that in other embodiments, the thicknesses of the first carbon fiber layer 10 and the second carbon fiber layer 20 may be different; as shown in fig. 2, the thickness of the first carbon fiber layer 10 is thinner than the thickness of the second carbon fiber layer 20; in other embodiments, the thickness of the first carbon fiber layer 10 may be thicker than the thickness of the second carbon fiber layer 20.
As a preferred embodiment, the tensile strength of the resin reinforcing layer is not less than 500kPa. The resin reinforcing layer has the characteristics of high temperature resistance and high strength, can resist high temperature of at least 200 ℃ for a long time (more than 20000 hours), and does not change in materials, structures, functions and the like; the strength is up to or better than that of the metal polar plate, and the tensile strength is more than or equal to 500kPa.
As a preferred embodiment, the first carbon fiber layer or the second carbon fiber layer is a carbon fiber layer pretreated by impregnation.
As a preferred embodiment, the first carbon fiber layer or the second carbon fiber layer is subjected to impregnation pretreatment by: and (3) placing the first carbon fiber layer or the second carbon fiber layer in 10-50wt% of thermosetting resin binder for impregnation treatment, taking out the first carbon fiber layer or the second carbon fiber layer after the impregnation treatment, and cleaning the surface with deionized water to obtain the first carbon fiber layer or the second carbon fiber layer.
As a preferred embodiment, the thermosetting resin binder is one or a mixture of at least two of epoxy resin, vinyl ester, phenolic or bismaleimide.
In a preferred embodiment, the conditions of the dipping treatment are vacuum-pumping and dipping at room temperature for 0.2 to 3.0 hours, and the dipping times are preferably 1 time.
As a preferable embodiment, the thickness of the first carbon fiber layer is 0.02mm to 0.5mm; the thickness of the second carbon fiber layer is 0.02 mm-0.5 mm. The thicknesses of the first carbon fiber layer and the second carbon fiber layer can be selected according to the actual use requirement and the design requirement of the multiphase composite polar plate.
As a preferred embodiment, the thickness of the conductive adhesive layer between the first carbon fiber layer and the resin reinforcing layer is 0.01mm to 0.2mm; the thickness of the conductive adhesive layer between the second carbon fiber layer and the resin reinforcing layer is 0.01-0.2 mm; and the thickness of the conductive adhesive layer between the first carbon fiber layer and the resin reinforcing layer is equal to the thickness of the conductive adhesive layer between the second carbon fiber layer and the resin reinforcing layer. Thus, uniformity of coating and forming of the conductive adhesive layer, and resistance and adhesion ability of the entire conductive adhesive layer can be ensured. If it is less than 0.01mm, that is, 10 μm, the difficulty of uniform coating and forming is great, and at the same time, the overall resistance of such a thin conductive adhesive layer is also great, and the adhesive strength is insufficient. If it is too thick, it is difficult to ensure uniformity of coating and forming.
As a preferable embodiment, the use temperature of the resin reinforcing layer is more than 200 ℃, and the structural tensile strength is more than or equal to 500kPa. In the present application, the structural strength of the resin reinforcing layer is superior to that of a stainless steel plate of the same thickness, but the external dimensions of the resin reinforcing layer are smaller than those of the first carbon fiber layer and the second carbon fiber layer.
As a preferred embodiment, the resin reinforcing layer has an external dimension smaller than external dimensions of the first carbon fiber layer and the second carbon fiber layer; and the distance between the edge of the resin reinforcing layer and the edge of the first carbon fiber layer or the distance between the edge of the resin reinforcing layer and the edge of the second carbon fiber layer is 0.05 mm-5 mm. By the arrangement, the conductive adhesive on the upper and lower parts of the resin reinforcing layer can be connected and conducted to form the conductive adhesive layer, so that the whole polar plate forms a conductor, and meanwhile, the strength near the sealing of the polar plate is ensured; if the distance is too narrow, the risk that the two sides of the polar plate cannot be conducted can be caused; if the distance is too wide, the portion of the plate without the resin reinforcing layer (carbon fiber layer/conductive adhesive/carbon fiber layer) will extend below the seal line (the vicinity of the plate seal line is a stress concentration area) which is subjected to a pressure of several MPa in the stack, and if the resin reinforcing layer is not present, the carbon fiber layer will deform and the conductive adhesive layer will deform and overflow, resulting in failure of the plate-membrane electrode seal.
In a preferred embodiment, the thickness of the resin reinforcing layer is 0.01mm to 0.8mm. This arrangement ensures the strength of the resin reinforcing layer. The thickness of less than 0.01mm, the strength of the resin reinforcing layer is insufficient, relatively brittle or easily deformed, and insufficient to support the whole electrode plate and membrane electrode. Too thick a thickness may result in a large increase in the thickness of the entire composite plate, thereby increasing the volume of the cell stack.
As a preferred embodiment, the resin reinforcing layer is a polyamide 66 resin reinforcing layer, an ABS resin reinforcing layer, or a PARMAX resin reinforcing layer.
As a preferred embodiment, the resin reinforcing layer is prepared by injection molding or 3D printing.
In a preferred embodiment, the conductive adhesive layer is a thermoplastic conductive adhesive layer or a thermosetting conductive adhesive layer.
In this application, set up first carbon fiber layer and second carbon fiber layer in the both sides outermost of heterogeneous composite polar plate respectively, can play electric conduction, heat conduction, prevent the effect that other structural layers corrode in the polar plate. The conductive adhesive layer is used for bonding the first carbon fiber layer, the second carbon fiber layer and the resin reinforcing layer, sealing the resin reinforcing layer inside the multiphase composite polar plate, and conducting electrons between the first carbon fiber layer and the second carbon fiber layer.
The preparation method of the multiphase composite polar plate comprises the following steps:
s1, coating first conductive adhesive on two opposite sides of a resin reinforcing layer, the side surface of a first carbon fiber layer close to the resin reinforcing layer and the side surface of a second carbon fiber layer close to the resin reinforcing layer respectively, and then bonding the first carbon fiber layer and the second carbon fiber layer on two opposite sides of the resin reinforcing layer coated with the first conductive adhesive respectively to obtain a composite structure;
s2, filling gaps in the composite structure in the step S1 by using a second conductive adhesive to obtain a filled composite structure; the first conductive adhesive and the second conductive adhesive form a conductive adhesive layer, and the conductive adhesive layer is a conductive adhesive layer with a closed loop;
s3, carrying out hot press solidification on the filled composite structure in the step S2 to obtain the multiphase composite polar plate with polar plate appearance and runner characteristics.
In step S1, the coating thickness of the first conductive adhesive is preferably 0.005mm to 0.1mm. Thus, uniformity of coating and forming of the conductive adhesive layer, and resistance and adhesion ability of the entire conductive adhesive layer can be ensured.
The first carbon fiber layer or the second carbon fiber layer is subjected to impregnation pretreatment by the following method: and (3) placing the first carbon fiber layer or the second carbon fiber layer in 10-50wt% (for example, 10-20wt%, 35-50wt% or the like) of thermosetting resin binder for impregnation treatment, taking out the first carbon fiber layer or the second carbon fiber layer after the impregnation treatment is finished, and cleaning the surface with deionized water to obtain the first carbon fiber layer or the second carbon fiber layer.
The thermosetting resin binder is one or a mixture of at least two of epoxy resin, vinyl ester, phenolic aldehyde or bismaleimide.
The conditions of the dipping treatment are that the dipping is carried out for 0.2 to 3.0 hours at room temperature under the condition of vacuumizing, and the dipping times are 1 time.
In the step S3 of the process,
the conditions for the hot press curing are hot press curing at 1MPa to 30MPa (for example, 1MPa, 6MPa, 20MPa, 30MPa, etc.), 120 ℃ to 170 ℃ (for example, 120 ℃, 140 ℃, 150 ℃ or 170 ℃ etc.) for 0.1 hour to 4.0 hours (for example, 0.1 hour, 0.5 hour, 2.0 hours, 4.0 hours, etc.).
Contact resistance of the multiphase composite polar plate<10mOhm·cm 2 The conductivity is 100S/cm-120S/cm, and the bending strength is high>50MPa, airtightSex characteristics<2*10 -6 cm 3 ·s -1 ·cm -2 Corrosion current<1uA/cm 2 Meets the DOE standard.
The thickness of the multiphase composite polar plate provided by the embodiment of the utility model can be less than 0.1mm, and the thickness of the base material is far less than that of a graphite polar plate and even better than that of a metal polar plate. The outermost layer of the multiphase composite polar plate is a carbon-based material polar plate with far-reaching corrosion resistance, no plating layer is needed, raw materials are easy to obtain, the price is low, the preparation and molding process is simple, and the multiphase composite polar plate is suitable for large-scale batch production. The resin reinforcing layer is sealed in the multiphase composite polar plate, so that the structural strength of the multiphase composite polar plate is effectively improved. The carbon fiber layer and the resin reinforcing layer are simple in forming process and excellent in air tightness, the air tightness of the whole composite pole plate can be effectively guaranteed, the air tightness failure of the whole pole plate caused by tiny breakage of similar metal pole plates in the stamping forming process can be avoided, the operation difficulty of stamping forming of the composite pole plate is effectively reduced, and the yield of the composite pole plate is greatly improved. The multiphase composite polar plate can work at the temperature of-50 ℃ to 200 ℃, has excellent electric conduction, heat conduction and corrosion resistance, has longer durable service life at high temperature, can be applied to a fuel cell, and can effectively improve the volume power density and the performance of the fuel cell, so that the whole fuel cell has better service performance.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (8)
1. The multiphase composite polar plate is characterized by comprising a first carbon fiber layer, a second carbon fiber layer, a conductive adhesive layer and a resin reinforcing layer; the resin reinforcing layer is arranged in the conductive adhesive layer, and the conductive adhesive layer is arranged between the first carbon fiber layer and the second carbon fiber layer;
the first carbon fiber layer and the second carbon fiber layer are uniformly filled with thermosetting resin binders; the resin reinforcing layer and the multiphase composite polar plate have the same flow passage and sealing structure;
the thickness of the multiphase composite polar plate is 0.05mm-1.00 mm.
2. The multi-phase composite plate according to claim 1, wherein the first carbon fiber layer or the second carbon fiber layer is a carbon fiber layer pretreated by impregnation.
3. The multiphase composite plate of claim 1, wherein the tensile strength of the resin reinforcing layer is greater than or equal to 500kPa; contact resistance of the multiphase composite polar plate<10mOhm·cm 2 The conductivity is 100S/cm-120S/cm, and the bending strength is high>50MPa, air tightness<2*10 -6 cm 3 ·s -1 ·cm -2 Corrosion current<1uA/cm 2 。
4. The multiphase composite plate of claim 1, wherein the first carbon fiber layer has a thickness of 0.02mm to 0.5mm.
5. The multiphase composite plate of claim 4, wherein the second carbon fiber layer has a thickness of 0.02mm to 0.5mm.
6. The multiphase composite plate of claim 5, wherein the thickness of the conductive adhesive layer between the first carbon fiber layer and the resin reinforcing layer is 0.01mm to 0.2mm; the thickness of the conductive adhesive layer between the second carbon fiber layer and the resin reinforcing layer is 0.01-0.2 mm; and the thickness of the conductive adhesive layer between the first carbon fiber layer and the resin reinforcing layer is equal to the thickness of the conductive adhesive layer between the second carbon fiber layer and the resin reinforcing layer.
7. The multi-phase composite plate according to claim 1, wherein an external dimension of the resin reinforcing layer is smaller than external dimensions of the first carbon fiber layer and the second carbon fiber layer; and the distance between the edge of the resin reinforcing layer and the edge of the first carbon fiber layer or the distance between the edge of the resin reinforcing layer and the edge of the second carbon fiber layer is 0.05 mm-5.00 mm.
8. The multi-phase composite plate according to claim 1, wherein the thickness of the resin reinforcing layer is 0.01mm to 0.8mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222452773.6U CN219286455U (en) | 2022-09-16 | 2022-09-16 | Multiphase composite polar plate |
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| CN202222452773.6U CN219286455U (en) | 2022-09-16 | 2022-09-16 | Multiphase composite polar plate |
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