KR102050971B1 - Ultralight weight carbon based bipolar plate and fuel cell stack comprising the same and manufacturing method for the same - Google Patents

Abstract

The present invention relates to a separator plate of a polymer fuel cell and a method of manufacturing the same. The ultralight carbon-based separator plate according to an aspect of the present invention includes a multilayer structure formed by laminating a carbon fiber fabric; And a polymer resin layer formed between each layer of the multilayer structure.

Description

ULTRALIGHT WEIGHT CARBON BASED BIPOLAR PLATE AND FUEL CELL STACK COMPRISING THE SAME AND MANUFACTURING METHOD FOR THE SAME}

The present invention relates to an ultra-light carbon-based separator and a fuel cell stack including the same, and a method for manufacturing the same, and more particularly, to a separator for a fuel cell formed of a carbon fiber fabric and a fuel cell stack including the same. .

A fuel cell is an energy converter that directly converts chemical energy generated by oxidation of fuel into electrical energy. Fuel cells have been developed in various forms and structures depending on the type of fuel used in the cell. Polymer Electrolyte Membrane Fuel Cell (PEMFC) uses a polymer membrane with hydrogen ion exchange as an electrolyte. These PEMFCs have high efficiency, high current density and power density, short start-up time, and fast response to load changes, so they can be applied to various fields such as power source, self-power generation, mobile and military power of pollution-free vehicle. Attempts are being made actively.

The stack of the PEMFC disclosed in the prior art is basically composed of a plurality of unit cells (Single cell) and two end plates (End plate).

PEMFC is composed of anode, cathode, polymer electrolyte membrane, two gas diffusion layers (GDL), a plurality of gaskets and a plurality of separators. have. The polymer electrolyte membrane serves as a carrier of hydrogen ions between the positive electrode and the negative electrode and also prevents contact between oxygen and hydrogen. The two electrodes of the positive electrode and the negative electrode are bonded to the polymer electrolyte membrane, which is called a membrane-electrode assembly (MEA).

The separator is disposed on both sides of the membrane-electrode assembly and is also an electrically conductive plate, also called a bipolar plate or flow field plate. In general, an anode side channel is formed on one side of the separator plate, and a cathode side channel is formed on the other side. Endplates are usually bolted using tie rods to reduce contact resistance between components and have connectors for outlet, inlet, coolant circulation, and power output of the reactor. .

On the other hand, at the anode of the PEMFC, hydrogen cations (Proton) and electrons (Electron) are generated by the oxidation reaction of hydrogen. The generated hydrogen cations and electrons move to the cathode through the electrolyte membrane and the separator, respectively. In the cathode, water, that is, moisture, is generated by a hydrogen cation, an oxygen reduction reaction between electrons and oxygen, and electric power is generated from the flow of electrons.

The separator should have low electrical resistance, high chemical resistance and mechanical properties, and low gas permeability to prevent leakage of hydrogen and oxygen. In addition, the electrical contact resistance between two adjacent separation plates should be low.

Generally, the material of the separator is composed of graphite, expanded carbon, stainless steel, or the like, or a polymer matrix composite material in which carbon particles and graphite particles are added to a polymer matrix. Polymer matrix composite) is used.

According to the existing method of manufacturing a separator plate, a separator is manufactured by milling graphite according to a flow path shape. In this case, the dividers account for 40% of the cost and over 70% of the weight of the stack.

The graphite separator has a high processing cost because it is manufactured through milling, but it is difficult to prevent gas mixing due to the low density. Therefore, it has to be formed to a predetermined thickness or more, there was a problem having a large volume.

In order to overcome this problem, metal separators for easy processing and lower manufacturing costs, composite separators containing polymers containing conductive materials, and separators for coating composite materials on metal plates have been developed after recent research.

Metal separators are being developed around stainless steel and have excellent competitiveness in both workability and electrical conductivity prices. However, stainless steel itself is vulnerable to corrosion characteristics, and as a way to compensate for this, researches on coating gold, platinum, and tungsten with high corrosion characteristics on the surface of stainless steel have been conducted. High processing costs were necessary because of the use. In addition, the composite separator has excellent electrical conductivity, which has been proposed as a conventional problem, but has a disadvantage of being easily broken.

Therefore, there is a demand for a new concept of a separator plate to solve the above problems.

The present invention is a result derived from the research to solve the various problems of the prior art as described above, the object of the present invention, all of the above-mentioned problems are solved to exhibit the mechanical strength properties observed while maintaining excellent electrical conductivity and corrosion resistance To provide an ultra-light carbon-based separator comprising a multi-layered structure formed using carbon fibers.

Ultralight carbon-based separator according to an aspect of the present invention, the multilayer structure formed by laminating a carbon fiber fabric; And a polymer resin layer formed between each layer of the multilayer structure.

According to one embodiment of the present invention, the carbon fiber fabric, carbon consisting of Vulcan, Carbon Black, Graphite carbon, Acetylene Black and Ketjen Black Carrier group; and carbon fiber group consisting of carbon nanotubes, carbon nanowires and carbon nanorods; may be one or more selected from.

According to an embodiment of the present invention, the multi-layered structure may include a plurality of layered structures formed by folding one carbon fiber fabric.

According to one embodiment of the invention, the polymer resin layer comprises a conductive material, the conductive material, carbon-based conductivity consisting of graphene, carbon nanotubes, carbon nanoribbons, carbon nanowires, carbon fibers and carbon black It may include one or more selected from the group of substances.

According to one embodiment of the present invention, the conductive material may be included in 50% by weight to 85% by weight relative to the total weight of the polymer resin layer.

According to an embodiment of the present invention, a layer formed of a carbon cloth including the carbon fiber fabric and a heterogeneous material may be further included in the polymer resin layer.

According to an embodiment of the present invention, the polymer resin layer may include an epoxy-based polymer, a phenol-based polymer, or both.

According to one embodiment of the invention, the polymer resin layer, N-aminoethylpiperazine (N- (aminoethyl) piperazine) and nonylphenol (Nonylphenol) in a weight ratio of 4: 6 to 6: 4 mixture It may be to include.

According to one embodiment of the present invention, the total thickness of the ultra-light carbon-based separator may be 0.3 mm or less.

According to one embodiment of the present invention, the total tensile strength of the ultra-light carbon-based separator plate may be 100 MPa or more, and the electrical conductivity may be 40 S / cm or more.

According to another aspect of the present invention, a method of manufacturing an ultralight carbon-based separator includes preparing a polymer resin solution; Mixing a conductive material with the polymer resin solution to form a conductive polymer slurry; Applying the conductive polymer slurry on at least one side of a carbon fiber fabric; Folding the carbon fiber fabric to form a multilayer structure; And pressing and drying the carbon fiber fabric forming the multilayer structure.

According to an embodiment of the present invention, the step of forming the multi-layer structure by folding the carbon fiber fabric, the step of inserting a carbon cloth comprising the carbon fiber fabric and another material between the multi-layer structure formed of the carbon fiber fabric Include.

According to an embodiment of the present invention, the pressing of the carbon fiber fabrics in the pressing and drying step may be performed at a pressure of 200 bar to 400 bar at 25 ° C. to 80 ° C. by a hot pressing method.

According to one embodiment of the invention, the drying of the step of compressing and drying the carbon fiber fabric, may be performed for 8 to 20 hours at 25 ℃ to 120 ℃ temperature.

According to an embodiment of the present invention, the preparing of the polymer resin solution may include N- (aminoethyl) piperazine and nonylphenol in an organic solvent of 4: 6 to 6: 4 It may be to include mixing in a weight ratio of.

Ultra-light carbon-based separator according to another aspect of the present invention, the thickness is 0.3 mm or less, the tensile strength is 100 MPa or more, the electrical conductivity is 40 S / cm or more, prepared according to an embodiment of the present invention It is manufactured by the method.

Polymer fuel cell stack according to another aspect of the present invention, the fuel cell electrode; Polymer electrolyte membrane; Gas diffusion layer; And an ultralight carbon-based separator according to one embodiment of the present invention.

When the ultra-light carbon-based separator of the present invention is used, there is an effect of securing an ultra-light carbon-based separator showing excellent mechanical strength properties while maintaining excellent electrical conductivity and corrosion resistance.

When using the ultra-light carbon-based separator provided in the present invention, even if the thickness of less than 0.3 mm can exhibit a consistent mechanical strength of 100 MPa or more tensile strength. In addition, the thickness of the separator can be reduced to 0.1 mm level. In this case, the fuel cell stack manufactured by including such a separator plate has an effect of lightening 70% of the weight, reducing the volume by about 65%, and the volume of the fuel cell system by about 13%. There is an effect that can be reduced.

Figure 1 is a schematic diagram showing the structure of the ultra-light carbon-based separator according to an embodiment of the present invention.
Figure 2 is a flow chart sequentially showing each step of the manufacturing method of the ultra-light carbon-based separator according to an embodiment of the present invention.
3 is a graph showing the tensile strength test results of the ultra-light carbon-based separator according to an embodiment of the present invention.
FIG. 4 is a SEM photograph of the surface of an ultralight carbon-based separator according to an embodiment of the present invention. FIG. 4 (a) is an SEM photograph of the surface of an ultralight carbon-based separator including a polymer resin, and FIG. 4 (b). Is a SEM photograph of the surface of an ultralight carbon-based separator including a conductive material in a polymer resin.
FIG. 5 is a SEM photograph of a portion where a carbon fiber fabric of an ultra-light carbon-based separator according to an embodiment of the present invention is formed.
6 is a SEM photograph of a polymer resin, carbon-based ultra-light separating plate according to one embodiment of the present invention taken in cross section penetrating into the carbon cloth surface.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

Various modifications may be made to the embodiments described below. The examples described below are not intended to be limited to the embodiments and should be understood to include all modifications, equivalents, and substitutes for them.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of examples. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

In addition, in the description with reference to the accompanying drawings, the same components regardless of reference numerals will be given the same reference numerals and redundant description thereof will be omitted. In the following description of the embodiment, when it is determined that the detailed description of the related known technology may unnecessarily obscure the gist of the embodiment, the detailed description thereof will be omitted.

Figure 1 is a schematic diagram showing the structure of the ultra-light carbon-based separator according to an embodiment of the present invention.

Hereinafter, with reference to FIG. 1, each structure and components of the ultra-light carbon-based separator provided in one aspect of the present invention will be described in detail.

Ultra-light carbon-based separator according to an aspect of the present invention, the multi-layer structure 110 formed of a carbon fiber fabric laminated; And a polymer resin layer 130 formed between each layer of the multilayer structure.

As shown in Figure 1, the present invention is characterized in that it comprises a multi-layer structure laminated in a carbon fiber fabric in the separator.

The carbon fiber fabrics can form a laminated plurality of layer structures. In this case, the plurality of layer structures may form a structure in which each layer is connected through an edge. For example, it may represent a structure formed by combining 'c' form, 'r' form, 'ㅌ' form or one or more of the above forms. When forming a layer laminated with the carbon fiber fabric, there is an advantage that can maintain a high electron conductivity by maintaining the electron transfer path to ensure high mechanical strength and low brittleness.

A layer formed of a polymer resin is provided between each layer of the multilayer structure. The polymer resin layer may be included between each layer of the stacked multilayer structure, or may be included only between a part of the layers. The polymer resin layer may serve to secure the strength by strengthening the bonding force between the carbon fiber fabric and the cloth and to prevent the leakage of gaseous fuel inside the ultra-light carbon-based separator.

According to one embodiment of the present invention, the carbon fiber fabric, carbon consisting of Vulcan, Carbon Black, Graphite carbon, Acetylene Black and Ketjen Black Carrier group; and carbon fiber group consisting of carbon nanotubes, carbon nanowires and carbon nanorods; may be one or more selected from.

According to an embodiment of the present invention, the multi-layered structure may include a plurality of layered structures formed by folding one carbon fiber fabric.

According to an embodiment of the present invention, the polymer resin layer includes a conductive material 120, and the conductive material includes graphene, carbon nanotubes, carbon nanoribbons, carbon nanowires, carbon fibers, and carbon black. It may include one or more selected from the group of carbon-based conductive materials.

The conductive material may be included in the polymer resin layer to serve to improve electrical conductivity.

According to one embodiment of the present invention, the conductive material may be included in 50% by weight to 85% by weight relative to the total weight of the polymer resin layer. At this time, if less than 50% by weight of the polymer resin layer may increase the thickness and electrical conductivity may cause a problem that can not act as a separator, if contained in excess of 85% by weight evenly impregnated polymer resin This impossibility and weakness of the bond between the carbon fiber fabrics can lead to problems of low strength and leakage of gaseous fuel.

According to an embodiment of the present invention, the polymer resin layer may further include a layer formed of a carbon cloth including the carbon fiber fabric and a heterogeneous carbon material.

When further comprising a layer formed of the carbon cloth, the ultra-light carbon-based separator of the present invention, a layer formed of a layer of a carbon fiber fabric-a polymer resin layer-a layer formed of a carbon cloth-a polymer resin layer-a layer of a carbon fiber fabric It may be formed to include a structure. The carbon material included in the layer formed of the carbon cloth is not particularly limited in the present invention, but may include a material different from the carbon material used in the layer of the carbon fiber fabric.

By further comprising a layer formed of the carbon cloth in the polymer resin layer, it is possible to prevent breakage due to the stress dispersion effect of the folded portion during thermocompression bonding and stack manufacturing to improve fuel cell durability and improve the mechanical strength of the carbon fiber separator. .

According to an embodiment of the present invention, the polymer resin layer may include an epoxy-based polymer, a phenol-based polymer, or both.

According to one embodiment of the invention, the polymer resin layer, N-aminoethylpiperazine (N- (aminoethyl) piperazine) and nonylphenol (Nonylphenol) in a weight ratio of 4: 6 to 6: 4 mixture It may be to include.

Selection of the material of the polymer resin layer in the present invention may be an important configuration. When the content of N-aminoethylpiperazine (N- (aminoethyl) piperazine) and nonylphenol (N- (aminoethyl) piperazine) is insufficient, the impact resistance of the cured product And a weakening of the bonding force with the carbon cloth may occur, if the content of nonylphenol (Nonylphenol) is insufficient, it may be difficult to maintain the curing properties due to the reduction of the curing rate and the restriction of the crosslinking reaction.

According to one embodiment of the present invention, the total thickness of the ultra-light carbon-based separator may be 0.3 mm or less.

According to one embodiment of the present invention, the ultra-light carbon-based separator is formed thin, thereby making it possible to manufacture a low-volume, low-weight fuel cell stack. According to one example, the ultra-light carbon-based separator may be 0.1 mm or less in thickness. In the present invention, even if the thickness of the ultra-light carbon-based separator is formed to 0.1 mm or less, it may be possible to realize a commercially available level of tensile strength.

According to one embodiment of the present invention, the total tensile strength of the ultra-light carbon-based separator plate may be 100 MPa or more, and the electrical conductivity may be 40 S / cm or more.

In another aspect of the present invention, a method for manufacturing an ultralight carbon-based separator is provided.

Figure 2 is a flow chart sequentially showing each step of the manufacturing method of the ultra-light carbon-based separator according to an embodiment of the present invention.

Hereinafter, with reference to Figure 2, each step of the manufacturing method of the ultra-light carbon-based separator will be described in detail.

According to another aspect of the present invention, a method of manufacturing an ultralight carbon-based separator includes preparing a polymer resin solution (S10); Mixing a conductive material with the polymer resin solution to form a conductive polymer slurry (S20); Applying the conductive polymer slurry on at least one side of a carbon fiber fabric (S30); Folding the carbon fiber fabric to form a multilayer structure (S40); And pressing and drying the carbon fiber fabric forming the multilayer structure (S50).

In another example, in the method of manufacturing an ultralight carbon-based separator, the steps of S30 and S40 may be reversed. In that case, after the carbon fiber fabric is folded to form a multilayer structure, a step of applying a conductive polymer slurry between the multilayer structures may be performed.

According to an embodiment of the present invention, the step of forming the multi-layer structure by folding the carbon fiber fabric, the step of inserting a carbon cloth comprising the carbon fiber fabric and another material between the multi-layer structure formed of the carbon fiber fabric Include.

According to an embodiment of the present invention, the pressing of the carbon fiber fabrics in the pressing and drying step may be performed at a pressure of 200 bar to 400 bar at 25 ° C. to 120 ° C. by a hot pressing method.

In this invention, it does not specifically limit about the apparatus used for the said crimping. However, the temperature of the pressing process is preferably maintained at 25 ℃ to 80 ℃. If the temperature is formed below 25 ℃, there may be a problem in removing the bubbles of the conductive polymer slurry, if formed above 80 ℃, the strength may be weakened by reducing the degree of curing due to decomposition of the polymer resin have. Preferably the temperature of the compression is maintained at 65 ℃ to 75 ℃.

It does not specifically limit about the method of maintaining the said pressure in this invention. However, the pressure of the compression process is preferably maintained at about 200 bar to 400 bar. When the compression is formed at less than 200 bar, there is a problem that the strength and electrical conductivity may be reduced since the bonding strength between the polymer resin and the carbon fiber cloth and the electrical path of the conductive carbon carrier group are not sufficiently provided, and 400 bar When formed in excess, the polymer resin may not be sufficiently impregnated between the carbon fiber cloth may cause a problem of inhibiting the strength

The pressure is preferably maintained at 250 bar to 350 bar.

According to one embodiment of the invention, the drying of the step of compressing and drying the carbon fiber fabric, may be performed for 8 to 20 hours at 25 ℃ to 120 ℃ temperature.

The method used in the drying process is not particularly limited in the present invention, an oven may be used, and other methods may be used. If the drying temperature is less than 25 ℃ may increase the production time as the cross-linking time is longer, in the case of more than 120 ℃ may cause a problem of strength degradation due to decomposition of the polymer resin.

According to an embodiment of the present invention, the preparing of the polymer resin solution may include N- (aminoethyl) piperazine and nonylphenol in an organic solvent of 4: 6 to 6: 4 It may be to include mixing in a weight ratio of.

In a preferred embodiment, the N-aminoethylpiperazine (N- (aminoethyl) piperazine) and nonylphenol (Nonylphenol) may be mixed in a 5: 5.

Ultra-light carbon-based separator according to another aspect of the present invention, the thickness is 0.3 mm or less, the tensile strength is 100 MPa or more, the electrical conductivity is 40 S / cm or more, prepared according to an embodiment of the present invention It is manufactured by the method.

In one example, the ultra-light carbon-based separator may be formed to a thickness of 0.1 mm or less.

In the present invention, the tensile strength may be proportional to the area of the manufactured ultralight carbon-based separator.

Polymer fuel cell stack according to another aspect of the present invention, the fuel cell electrode; Polymer electrolyte membrane; Gas diffusion layer; And an ultralight carbon-based separator according to one embodiment of the present invention.

Example

Example 1

As an embodiment of the ultra-light carbon-based separator of the present invention, a carbon fiber fabric is composed of carbon fibers, and N- (aminoethyl) piperazine and Nonylphenol are contained in a weight ratio of 5: 5. A polymer resin solution was prepared by mixing to prepare a conductive polymer slurry.

Thereafter, the conductive polymer slurry was applied onto the carbon fiber fabric, the carbon fiber fabric was folded to form a multilayer structure, and pressed using a hot pressing apparatus at a pressure of 300 bar at a temperature of 70 ° C. and 12 at a temperature of 60 ° C. Drying in an oven for a time to prepare an ultralight carbon-based separator according to the present invention. The ultralight carbon-based separator formed in this manner had a thickness of 0.261 mm.

Example 2

As another embodiment of the present invention, an ultralight carbon-based separator was manufactured under the same conditions as in Example 1 except that carbon nanotubes (CNT) were manufactured in a thickness different from that of the carbon fiber fabric (0.102 mm).

Example 3

As another embodiment of the present invention, an ultralight carbon-based separator was manufactured under the same conditions as in Example 1 except that graphite was included as a conductive polymer material in the polymer resin.

Various physical characteristics were tested with the ultralight carbon-based separators prepared in Examples 1 and 2, and the results are shown in Table 1 below.

Thickness (mm) Weight ratio of polymer resin and carbon
(g / cm ² ) resistance
(ρ, Ωcm) Electrical conductivity
(σ, S / cm) Tensile Strength (MPa) Example 1 0.261 0.016 0.0223 44.77 117.90 Example 2 0.102 0.015 0.0114 87.61 101.84

Figure 3 is a graph showing the tensile strength test results of the ultra-light carbon-based separator according to an embodiment of the present invention.

Through the tensile strength test of the ultra-light carbon-based separators prepared in Examples 1 and 2, it was confirmed that the tensile strength of the ultra-light carbon-based separator provided in the present invention is formed to about 100 MPa or more.

In addition, in Example 1 and Example 3, the microstructure and the cross-section was observed through SEM imaging to observe whether the ultra-light carbon-based separator of the present invention was effectively formed.

Figure 4 is a SEM photograph of the surface of the ultra-light carbon-based separator according to an embodiment of the present invention, Figure 4 (a) is a SEM photograph of the surface of the ultra-light carbon-based separator (Example 1) containing a polymer resin, Figure 4 (b) is a SEM photograph of the surface of the ultra-light carbon-based separator (Example 3) containing a conductive material in the polymer resin.

FIG. 5 is a SEM photograph of a portion where a carbon fiber fabric of an ultralight carbon-based separator according to an embodiment (Example 1) of the present invention is formed.

FIG. 6 is a SEM photograph of a cross section in which the polymer resin of the ultra-light carbon-based separator according to one embodiment of the present invention penetrates to the surface of the carbon fiber fabric.

Through the SEM photographs, it can be seen that the polymer resin layer is effectively formed between the multilayered structures laminated with the carbon fiber fabric of the present invention to effectively manufacture the ultralight carbon-based separator provided in the present invention.

Although the embodiments have been described by the limited embodiments and the drawings as described above, various modifications and variations are possible to those skilled in the art from the above description. For example, the techniques described may be performed in a different order than the described method, and / or the components described may be combined or combined in a different form than the described method, or replaced or substituted by other components or equivalents. Appropriate results can be achieved.

Therefore, other implementations, other embodiments, and equivalents to the claims are within the scope of the claims that follow.

Claims (17)

A multilayer structure formed by laminating with a carbon fiber fabric; And
And a polymer resin layer formed between each layer of the multilayer structure.
In the polymer resin layer, further comprising a layer formed of a carbon cloth comprising the carbon fiber fabric and a different material;
Ultralight carbon based separator.
Claim 2 has been abandoned upon payment of a set-up fee. The method of claim 1,
The carbon fiber fabric, the carbon carrier group consisting of Vulcan, Carbon Black, Graphite carbon, Acetylene Black and Ketjen Black; and carbon nanotubes, carbon Carbon fiber group consisting of nanowires and carbon nanorods; including at least one selected from,
Ultralight carbon based separator.
The method of claim 1,
The multi-layered structure includes a plurality of layered structures formed by folding one carbon fiber fabric,
Ultralight carbon based separator.
The method of claim 1,
The polymer resin layer includes a conductive material,
Of the conductive material, well comprises a pin, carbon nanotubes, carbon nanoribbons, carbon nanowire, carbon fibers and at least one selected from a carbon-based conductive material, the group consisting of carbon black,
Ultralight carbon based separator.
Claim 5 was abandoned upon payment of a set-up fee. The method of claim 4, wherein
Wherein the conductive material is 50 wt% to 85 wt% based on the total weight of the polymer resin layer,
Ultralight carbon based separator.
delete The method of claim 1,
Wherein the polymer resin layer, including an epoxy-based polymer, a phenol-based polymer or both,
Ultralight carbon based separator.
Claim 8 has been abandoned upon payment of a set-up fee. The method of claim 1,
The polymer resin layer, N-aminoethylpiperazine (N- (aminoethyl) piperazine) and nonylphenol (Nonylphenol) is a mixture comprising a mixture of 4: 6 to 6: 4 by weight,
Ultralight carbon based separator.
Claim 9 was abandoned upon payment of a set-up fee. The method of claim 1,
The thickness of the entire ultra-light carbon-based separator is 0.3 mm or less,
Ultralight carbon based separator.
The method of claim 1,
A tensile strength of the entirety of the carbon-based ultra-light separating plate is more than 100 MPa,
Electrical conductivity is 40 S / cm or more,
Ultralight carbon based separator.
Preparing a polymer resin solution;
Mixing a conductive material with the polymer resin solution to form a conductive polymer slurry;
Applying the conductive polymer slurry on at least one side of a carbon fiber fabric;
Folding the carbon fiber fabric to form a multilayer structure; And
And pressing and drying the carbon fiber fabric forming the multilayer structure.
Folding the carbon fiber fabric to form a multi-layer structure,
Inserting a carbon cloth comprising the carbon fiber fabric and another material between the multilayer structures formed of the carbon fiber fabric;
Method for producing ultra-light carbon-based separator plate.
delete The method of claim 11,
The compression of the step of pressing and drying the carbon fiber fabric,
It is carried out at a pressure of 200 bar to 400 bar at 25 ℃ to 80 ℃ by hot pressing method,
Method for producing ultra-light carbon-based separator plate.
Claim 14 was abandoned upon payment of a set-up fee. The method of claim 11,
The drying of the step of pressing and drying the carbon fiber fabric,
8 to 20 hours at a temperature of 25 ℃ to 120 ℃,
Method for producing ultra-light carbon-based separator plate.
Claim 15 was abandoned upon payment of a set-up fee. The method of claim 11,
Preparing the polymer resin solution,
Which comprises the mixing in a weight ratio of 4: the N- aminoethyl piperazine Pfeiffer (N- (aminoethyl) piperazine) and nonylphenol (Nonylphenol) 4 in an organic solvent: 5 to 6
Method for producing ultra-light carbon-based separator plate.
Having a thickness of 0.3 mm or less, a tensile strength of 100 MPa or more, and an electrical conductivity of 40 S / cm or more,
Claim 11, prepared by the manufacturing method of any one of claims 13 to 15,
Ultralight carbon based separator.
Fuel cell electrodes;
Polymer electrolyte membrane;
Gas diffusion layer; And
Including the ultra-light carbon-based separator of claim 16,
Polymer fuel cell stacks.

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