KR20100005700A - Composition for source particle of high-temperature typed bipolar plate for fuel cell and high-temperature typed bipolar plate for fuel cell manufactured by using the same - Google Patents

Abstract

PURPOSE: A high-temperature bipolar plate material composition for a fuel cell is provided to obtain a high-temperature composite resin bipolar plate with excellent high-temperature stability and durability in a range of 120~400 °C. CONSTITUTION: A high-temperature bipolar plate material composition for a fuel cell comprises graphite powder 100.0 parts by weight, carbon black 0.2-10 parts by weight, and cyanate ester-based resin 0.1-40 parts by weight. The graphite powder contains pillar-shaped graphite with an aspect ratio of 1.5-2. The specific surface area of carbon black is 50-100 m^2/g. The cyanate ester based resin is 0.05-20 parts by weight.

Description

High Temperature Composite Resin Separator for Fuel Cell Raw Material Composition and High Temperature Composite Resin Separator for Fuel Cell Manufactured Using the Same BY USING THE SAME}

The present invention relates to a high temperature composite resin separator for fuel cells and a method for manufacturing the same, and more particularly, to a high temperature composite resin separator for fuel cells and a method for manufacturing the same having improved high temperature stability and durability.

Generally, a fuel cell refers to an electrochemical device that directly converts chemical energy of a fuel such as hydrogen or methanol into electrical energy by an electrochemical reaction. In general, in the case of a fuel cell using hydrogen as a fuel, an oxidation reaction of hydrogen and a reduction reaction of oxygen occur inside, and electricity and water are generated as a result.

The fuel cell is not only high in efficiency, but also because it can use a variety of fuel has attracted attention as a future energy source.

In particular, in the case of a polymer electrolyte membrane fuel cell (PEMFC), it is possible to reduce the emission of air pollutants such as carbon dioxide from the environmental aspects, and operate at a relatively low temperature of 80 ℃ compared to other fuel cells do. In addition, since the current density is high and the polymer electrolyte is used, there is no corrosion and electrolyte loss of the electrode, and it has the advantage of having high power generation efficiency.

The basic structure of the polymer electrolyte fuel cell includes a porous anode and a cathode coated with platinum (Pt) or platinum-ruthenium (Pt-Ru) catalysts on both sides of the polymer electrolyte membrane. In the form of the reaction gas passage and the separator serving as the current collector is located. That is, after the electrolyte membrane is placed between the anode and the cathode, the membrane is heated and pressed under a certain pressure at or above the glass transition temperature (Tg) of the electrolyte membrane to prepare a membrane electrode assembly (MEA), and then a separator is disposed outside thereof. do.

路板)으로도 알려져 있는데, 그 한쪽 면에서는 연료극 가스 유로가, 그 다른 쪽 면에서는 공기극 가스 유로가 형성된다. 상기 연료극 가스 유로에는 연료인 수소가 들어가고, 상기 공기극 가스 유로에는 산화제인 산소 또는 공기가 유입되며, 전극 표면에서 이와 같이 유입된 연료 가스의 전기화학적 산화와 산화제의 전기 화학적 환원에 의하여 전기 에너지가 발생하게 된다.The separator plate may be a bipolar plate or a flow path plate (

Also known as i), the anode gas flow path is formed on one side thereof and the cathode gas flow path is formed on the other side thereof. Hydrogen as a fuel enters into the anode gas flow path, and oxygen or air as an oxidant flows into the cathode gas flow path, and electrical energy is generated by electrochemical oxidation of the fuel gas thus introduced and electrochemical reduction of the oxidant on the electrode surface. Done.

In addition, the separator provides a passage for supplying fuel and an oxidant, and serves as a current collector to conduct electrons generated from the anode toward the cathode, and serves as a passage for removing water generated during battery operation.

In addition, the separator is a main body for supporting the MEA to achieve a stack (stack), and also serves as a cooling water passage to remove the heat of reaction to maintain a constant stack temperature. The cooling water passage may be formed in all the separators used in the stack, or only in some of the separators. In the case of a separator plate in which a coolant passage is formed, fuel is supplied to one side, an oxidant is supplied to the other side, and cooling water is supplied to the middle of the separator plate. In this case, two separation plates having a gas flow path formed on one surface and a cooling water flow path formed on the other surface are joined to each other to face the cooling water flow path, thereby completing the separation plate.

The separator prepared in this way must be light while maintaining strength, and must have excellent electrical conductivity because it must efficiently transfer the produced electrons. In addition, it should be excellent in corrosion resistance, robustness, thin and light, and should be good in workability, inexpensive and long in life. In addition, smooth supply of humidified reactant gas must be carried out and the water produced by the electrochemical reaction must be removed essentially.

As the separator, a metal separator and a graphite separator were used. However, the metal separator is limited in use due to workability, corrosion, and the like, and the graphite separator has a high flow path forming cost by machining.

Therefore, to solve this problem, the research on the polymer composite resin separator is being actively conducted. The polymer composite resin separation plate is manufactured through compression molding and injection molding after mixing the graphite powder and the polymer resin, there is an advantage that can produce a separation plate including a flow path without machining.

In general, a polymer electrolyte fuel cell using the polymer composite resin separator has an operating temperature of 100 ° C. or less. In this case, when the operating temperature is increased to 120 to 150 ° C., the hydrogen ion conductivity of the separator may be increased to reduce the membrane humidification step, and the activity of the catalyst may be increased to reduce the amount of catalyst used and the CO poisoning phenomenon. have.

However, although the polymer composite resin separator of the conventional polymer fuel cell operates stably at 100 ° C or lower, the mechanical properties of the separator such as flexural strength and modulus are drastically reduced at 100 ° C or higher. Due to this, there is a problem in that the function of the separation plate is lost. That is, it is difficult to operate smoothly at high temperature with the existing polymer component or content present in the separator. Therefore, the demand for development of a material having excellent high temperature stability and durability is accelerated for this purpose.

Technical challenge

The present invention is to solve the problems of the prior art as described above, more specifically, high temperature composite resin separation plate for fuel cells excellent in high temperature stability and durability raw material composition and high temperature composite resin separation plate for fuel cells manufactured using the same It is about.

Technical solution

The high temperature composite resin separator raw material composition for a fuel cell according to an aspect of the present invention includes a high temperature type fuel cell including 100 parts by weight of graphite powder, 0.2 to 10 parts by weight of carbon black, and 0.1 to 40 parts by weight of cyanate ester resin. Composite resin separator contains a raw material composition.

The graphite powder includes graphite having a columnar shape having an aspect ratio of 1.5 to 2.

The carbon black has a specific surface area of 50 to 100 m ² / g.

The cyanate ester resin may be a phenol novolac-based cyanate ester resin, a biphenol-based dicyanate ester resin, or a bisphenol A dicyanate ester. -based dicyanate ester resins, bisphenol E-based dicyanate ester resins, bisphenol F-based dicyanate ester resins, and the like.

The cyanate ester resin may be 0.05 to 20 parts by weight based on 100 parts by weight of the graphite powder, and the composite resin separator raw material composition may further include 0.05 to 20 parts by weight of an epoxy resin.

The composite resin separator raw material composition may further comprise 0.01 to 1 part by weight of a curing accelerator.

Examples of the hardening accelerator include transition metal complexes in which metals such as cobalt, copper, manganese, lead, nickel, and zinc are present in the form of acetylacetonate, octoate, and naphthenate. ) Catalysts can be used.

The composite resin separator raw material composition further comprises 0.1 to 3 parts by weight of a release agent, the release agent may be used carnauba wax and the like.

The high temperature composite resin separator for a fuel cell according to an aspect of the present invention includes a cross-linked structure of phenolic triazine.

The network structure of the phenolic triazine is formed by thermally crosslinking a phenolic cyanate ester polymer.

The composite resin separator plate for the fuel cell further includes an oxazoline structure formed by reacting an epoxy group and a cyanate ester group.

1 is a conceptual cross-sectional view showing an apparatus for preparing a raw material powder for a separator plate for a fuel cell according to an embodiment of the present invention.

Embodiment for Invention

Hereinafter, the present invention will be described in detail.

The high temperature composite resin separator raw material composition for a fuel cell according to an aspect of the present invention includes graphite powder, carbon black, cyanate ester resin, epoxy resin, a curing accelerator, and a release agent.

As the graphite powder, primary graphite having a columnar (stereoscopic, blocky) crystal structure having an aspect ratio of 1.5 to 2 is used without using graphite having a plate crystal structure.

As described above, when graphite having a columnar or three-dimensional crystal structure is used, the warpage of the manufactured separator may be significantly reduced, thereby showing excellent fastening characteristics when stacks are fastened, and stability of the fuel cell manufactured. Can improve.

As the graphite powder, those having an average particle size of 50 to 150 µm and having a narrow particle size distribution are preferably used.

In addition, in consideration of the effect on the long-term durability of the separator to be produced, the purity of the graphite powder is preferably 99.5% or more, the smaller the ash content (ash content) and the metal content is preferred.

The carbon black is used to reduce the penetration resistance of the separator, and the specific surface area (BET) of the carbon black is preferably 50 to 100 m ² / g. In this case, when the specific surface area is less than 50 m ² / g, the effect of reducing the penetration resistance is insignificant. On the other hand, if the specific surface area exceeds 100 m ² / g, evenly distributed during the production of raw material powder is difficult to reduce the physical properties of the separator produced.

In addition, the ash content of the carbon black is preferably less than 0.1%.

The content of the carbon black is 0.2 to 10 parts by weight based on 100 parts by weight of the graphite powder. If the carbon black is less than 0.2 part by weight, the penetration resistance of the separator to be produced may be increased too much. On the other hand, if it exceeds 10 parts by weight, the bending strength of the separator to be produced may be significantly reduced, adversely affect the curing reaction of the polymer may reduce the workability. Therefore, the content of the carbon black is 0.2 to 10 parts by weight, preferably 2 to 5 parts by weight with respect to 100 parts by weight of the graphite powder.

The cyanate ester resin may be a phenol novolac-based cyanate ester resin, a biphenol-based dicyanate ester resin, or a bisphenol A-type dicyanate ester. A-based dicyanate ester resins, bisphenol E-based dicyanate ester resins, bisphenol F-based dicyanate ester resins, and the like.

As the cyanate ester resin, a phenol novolac cyanate ester resin, a biphenol dicyanate ester resin, a bisphenol A dicyanate ester resin, a bisphenol E dicyanate ester resin, a bisphenol F dicyanate ester resin, or the like can be used. It is also possible to use a form in which a methyl group is substituted in the benzene ring, such as dimethyl bisphenol A dicyanate resin and tetra ortho methyl bisphenol F dicyanate resin. The cyanate ester resin may be used alone or in combination of two or more.

The content of the cyanate ester resin is 0.1 to 40 parts by weight based on 100 parts by weight of the graphite powder. In this case, when the content of the cyanate ester resin is less than 0.1 part by weight based on 100 parts by weight of the graphite powder, the deterioration of physical properties of the separator to be produced may be severe and the flexural strength may be reduced. On the other hand, when the content of the cyanate ester resin exceeds 40 parts by weight, the penetration resistance of the separator to be prepared may increase rapidly.

As the epoxy resin, any one containing an epoxy group can be used, but in consideration of thermal stability, it is preferable to use one containing a phenol group. As said epoxy resin, a phenol novolak-type epoxy resin, a cresol novolak-type epoxy resin, a naphthalene ring containing epoxy resin, a phenol aralkyl type epoxy resin, a biphenyl type epoxy resin, a substituted epoxy resin, bisphenol-A epoxy resin, bisphenol F type epoxy resin etc. can be used.

The epoxy resin may be used together with the cyanate ester resin, and may be used together within 40 parts by weight of the total polymer relative to 100 parts by weight of the graphite powder.

For example, when the cyanate ester resin is 0.05 to 20 parts by weight, the epoxy resin may be used at 0.05 to 20 parts by weight. In view of the penetration resistance of the separator, even when using a mixture of cyanate ester resin and epoxy resin as described above, the total polymer content is preferably not more than 40 parts by weight.

When using a mixture of cyanate ester resin and epoxy resin as described above, it is not necessary to use a separate epoxy curing agent, but for efficient curing, imidazole compound, organic phosphorus compound, secondary amine, tertiary amine, And curing agents such as quaternary ammonium salts.

Examples of the imidazole compound include imidazole, 2-ethyl imidazole, 2-ethyl-4-methyl imidazole, 2-phenyl imidazole, 2-undecyl imidazole, 1-benzyl-2-methyl imidazole, 2 -Heptadecyl imidazole, 4,5-diphenyl imidazole, 2-methyl imidazoline, 2-phenyl imidazoline, 2-undecyl imidazoline, 2-heptadecyl imidazoline, 2-isopropyl Imidazoline, 2,4-dimethyl imidazole, 2-phenyl-4-methyl imidazole, 2-ethyl imidazoline, 2-isopropyl imidazoline, 2,4-dimethyl imidazoline and 2-phenyl- 4-methyl imidazoline and the like can be used.

Triphenyl phosphine may be used as the organophosphorus compound.

Piperidine and the like may be used as the secondary amine, and dimethyl benzyl amine, tris (dimethyl amino methyl) phenol, and the like may be used as the tertiary amine, and tetrabutyl ammonium bromide and tetra butyl as the quaternary ammonium salt. Ammonium chloride and the like can be used.

The content of the curing agent, when the cyanate ester resin is 0.05 to 20 parts by weight and the epoxy resin is 0.05 to 20 parts by weight based on 100 parts by weight of the graphite powder, 0.001 to 1 parts by weight of the curing agent is used. If the amount of the curing agent is less than 0.001 part by weight, it is difficult to see the effect of using the curing agent. If the amount of the curing agent is more than 1 part by weight, the crosslinking density becomes excessive.

The curing accelerator is a transition metal complexes in which metals such as cobalt, copper, manganese, lead, nickel, and zinc exist in the form of acetylacetonate, octoate, and naphthenate. Catalysts can be used.

The curing accelerators include acetylacetonate cobalt (acetyl acetylacetonate), acetyl acetone manganese (manganic acetylacetonate), acetyl acetone zinc (zinc acetylacetonate), acetyl acetone copper (copper acetylacetonate), acetyl acetone nickel (nickel acetylacetonate), Titanyl acetylacetonate, manganese octoate, cobalt octoate, zinc octoate, ferric octoate, ferric octoate, tin octoate, naphthalene Lead naphthenate, manganese naphthenate, cobalt naphthenate, zinc naphthenate, cupric naphthenate, and the like can be used.

The content of the curing accelerator, when the cyanate ester resin is 0.1 to 40 parts by weight based on 100 parts by weight of the graphite powder, comprises 0.01 to 1 parts by weight of the curing accelerator. When the amount of the curing accelerator is less than 0.01 part by weight, it is difficult to see the effect of promoting the curing. When the amount of the curing accelerator exceeds 1 part by weight, metal ions are eluted from the fuel cell separation plate, resulting in deterioration of the performance of the fuel cell.

Carnauba wax or the like may be used as the release agent. The release agent serves to make the separation plate well separated from the mold during extrusion or injection molding of the separation plate.

The carnauba wax, unlike polyethylene wax (PE wax), oxidized polyethylene wax (Oxidized PE wax) and the like can impart releasability without affecting the curing of the polymer, to produce a raw material powder having a crosslinking reaction as in the present invention Suitable for

The content of the release agent is 0.1 to 3 parts by weight based on 100 parts by weight of the graphite powder. If the content of the release agent is less than 0.1 parts by weight, it is difficult to secure proper release property, and if the content is more than 3 parts by weight, the mechanical properties of the separator may be reduced.

The high temperature composite resin separator for a fuel cell according to an aspect of the present invention includes preparing raw material materials, fluidizing and coating the raw material materials to prepare raw material powders, and separating the heated raw material powders by heating and pressing. It can be produced through the step of manufacturing the plate.

In order to manufacture the separator, first, the raw materials are prepared.

The raw material materials include graphite powder, carbon black, cyanate ester resin, epoxy resin, curing accelerator, release agent and the like.

The graphite powder, the carbon black, and the release agent are mixed in an appropriate ratio to prepare a powder mixture, and the cyanate ester resin, the epoxy resin, and a curing accelerator are dissolved in an appropriate ratio in a solvent such as methyl ethyl ketone or acetone to polymerize. Prepare a solution separately.

Using the powder mixture and the polymer solution prepared above, a separator raw material powder is prepared through a fluidization coating process.

Hereinafter, an example of a fluidizing coating process will be described with reference to FIG. 1.

Referring to FIG. 1, the separator plate raw material powder manufacturing apparatus 1000 for a fuel cell includes a first chamber region 100, a second chamber region 200, and a solvent recovery apparatus 300.

The first chamber region 100 includes a spray nozzle 110 for atomizing the solution mixture, a raw material input unit 120 into which the powder mixture is injected, and a gas injection unit 130 into which the fluidizing gas is injected. The gas injection unit 130 is disposed at the lower portion of the gas injection pipe 132, the heating device 134 connected to the gas injection pipe 132, the temperature control device 136 connected to the heating device, and the first chamber area. Disposed gas distribution plate 138.

The second chamber area 200 includes a gas discharge part 210 and a skirt area 220 through which the solvent of the fluidizing gas and the solution mixture is discharged and connected to the solvent recovery device 300.

In order to manufacture a fuel cell raw material powder using the fuel cell separator raw material powder manufacturing apparatus, first, the fluidizing gas is heated to an appropriate process temperature through the heating device 134 connected to the gas injection pipe 132. In this case the temperature of the heated fluidizing gas is controlled via the temperature control device 136. Thereafter, the heated fluidizing gas is introduced into the first chamber region 100 through the gas injection tube 132.

In addition, although general air and various other gases may be used as the fluidizing gas, it is preferable to use nitrogen gas in order to suppress the possibility of addition reaction and dust explosion other than coating.

While the fluidizing gas is continuously supplied through the gas injection pipe 132, a powder mixture is supplied to the raw material input part 120.

The supplied powder mixture was dispersed in the first chamber region 100 and then in the fluidization region A in the first chamber region 100 formed by the skirt region 220 and the sheave 50. Fluidized (first fluidization step).

Thereafter, the polymer solution is sprayed through the spray nozzle 110.

The sprayed polymer solution is fluidized with the powder mixture which is pre-fluidized by the fluidizing gas (second fluidization step).

In the present invention, the powder mixture is first fluidized, followed by spraying the polymer solution to the second fluidization method. However, in some cases, the powder mixture and the polymer solution may be fluidized simultaneously.

When the first fluidization and the second fluidization proceed, the polymer solution is coated on the powder mixture in the fluidization zone (A). In this case, the thickness of the coating layer may be adjusted by adjusting the amount of the polymer solution, the concentration of the polymer solution, the injection speed of the fluidizing gas, the temperature of the fluidizing gas, and the like, with respect to the powder mixture.

In addition, when the first fluidization and the second fluidization proceed, solvent drying in the polymer solution occurs along with the coating. That is, as the solvent component on the coated powder mixture is vaporized by the fluidizing gas, only the polymer coating layer remains on the powder mixture.

In order to completely dry the solvent component, the fluidizing gas should be continuously injected for a certain time after the powder mixture is injected and the polymer solution spraying is finished, and the injection time of the fluidizing gas can be adjusted according to the characteristics of the solvent used and the coating amount. have.

The evaporated solvent component is discharged together with the fluidizing gas to the gas discharge unit 210, and the solvent component is collected in the solvent recoverer 300 connected to the gas discharge unit 210.

The fluidized gas discharged to the gas discharge unit 210 may be processed through a filter and reused.

The raw material powder may be prepared by using equipment such as a general coating mixer other than the fluidized coating chamber. However, when the fluidized coating chamber is used, raw material powder having a uniform size distribution may be obtained. The problem that the polymer-coated portion is exposed on the surfaces of the materials or the powder material itself is pulverized can be solved.

In the above, the polymer solution is exemplified as including both the cyanate ester resin and the epoxy resin, but can be used only cyanate ester resin alone.

Subsequently, using the separator raw material powder prepared by including both the cyanate ester-based resin and epoxy-based resin, to prepare a fuel cell separator plate by compression and injection molding. By the heat applied to the raw material powder during molding, the cyanate ester resin alone or the cyanate ester resin and the epoxy resin react together to have a cross-linked structure, thereby forming a separator having thermal and mechanical strength. do. In this case, the final fuel cell separator has a network structure including a phenolic triazine structure and an oxazoline structure.

The network structure including the phenolic triazine structure may be represented by the following Chemical Formula 1.

[Formula 1]

The crosslinked cyanate ester resin may further include structures such as a phenyl group, a biphenol group, a bisphenol group, and a substituted phenyl group, biphenol group, and bisphenol group based on the structure of Chemical Formula 1.

As one example, the phenol novolac cyanate ester resin in the cyanate ester resin is crosslinked by heat to form a network structure of a phenolic triazine such as the following Scheme 1.

Scheme 1

When the phenolic triazine network is formed as described above, the separator has high thermal stability and physical properties. The thermal stability of the separator can be adjusted up to 120 ~ 400 ℃ depending on the type of polymer used.

The thermosetting reaction for forming the network structure of the phenolic triazine is very slow. Therefore, in order to accelerate the thermosetting reaction, an appropriate curing accelerator such as a transition metal compound catalyst is preferably used.

The oxazoline network structure is formed by reacting a cyanate ester group of a cyanate ester resin with an epoxy group of the epoxy resin, and a reaction scheme in which the oxazoline structure is formed is shown in Scheme 2 below.

Scheme 2

In the scheme, R includes the remaining functional groups except for the cyanate ester functional groups in the cyanate ester resin, and R 'includes the remaining functional groups except for the epoxy functional groups in the epoxy resin.

As a result, the separator for fuel cell may include a phenolic triazine network alone, or may alternatively include both the phenolic triazine network structure and an oxazoline structure.

Hereinafter, the present invention will be described in more detail with reference to specific examples and comparative examples. However, the technical spirit of the present invention is not limited by the following examples.

Example 1

100 parts by weight of artificial graphite powder having an average particle diameter of 75 mu m and an aspect ratio of particles of 1.5, 17 parts by weight of novolac cyanate ester resin, 17 parts by weight of epoxy resin, 0.01 part by weight of cobalt acetyl acetonate, Carbauna wax was mixed at a ratio of 0.1 parts by weight and coated through a fluidization coating chamber to prepare a raw material powder for the separator.

The average particle diameter of the final powder prepared by using the manufacturing apparatus was about 150㎛, particle size distribution uniformity was about 0.3 to obtain a very uniform separation plate raw material powder.

Using the raw material powder prepared above, a separator was prepared at 225 ° C., 142 MPa, and 5 minutes.

(1) bending strength measurement

Using the prepared separator, the flexural strength of the separator was measured by ASTM D790 method, and the results are shown in Table 1.

(2) electrical conductivity measurement

Using the prepared separator, the penetration resistance of the separator was measured in terms of ASTM ASTM C611 and converted into electrical conductivity, and the results are shown in Table 1.

(3) Modulus and glass transition temperature measurement

Using the prepared separator, the modulus change and the glass transition temperature according to the temperature of the separator were measured using a dynamic mechanical analyzer (DMA). The measurement conditions, the temperature increase rate 2 ℃ / min, vibration 10Hz, 50㎛ (amplitude), a single clamp was used, the results are shown in Table 1.

Comparative Example 1

)의 분리판을 사용하여 실시예 1과 같이 굴곡강도, 전기전도도, 유리 전이 온도, 및 모듈러스를 측정하여 표 1에 나타내었다.ShinEtsu Corporation

Flexural strength, electrical conductivity, glass transition temperature, and modulus were measured in the same manner as in Example 1, using a separator plate of).

Comparative Example 2

)의 분리판을 사용하여 실시예 1과 같이 굴곡강도, 전기전도도, 유리 전이 온도, 및 모듈러스를 측정하여 표 1에 나타내었다.Entegris

Flexural strength, electrical conductivity, glass transition temperature, and modulus were measured in the same manner as in Example 1, using a separator plate of).

Table 1

As shown in Table 1, the flexural strength and electrical conductivity of the separator according to the present invention was found to be superior to the separator of the comparative example.

In addition, the glass transition temperature of the separator according to the present invention showed an equivalent or more than the glass transition temperature of the separator according to the comparative example, it can be seen that the modulus at 150 ℃ is superior to the comparative example.

As described above, the high temperature composite resin separation plate composition for a fuel cell and the separation plate using the same according to the present invention may provide high temperature stability and durability within a range of 120 to 400 ° C. That is, physical property stability can be improved at high temperature by introducing a phenolic triazine network structure into a separating plate using a phenolic cyanate ester resin. In addition, the separator has a high flexural strength, which enables stable stack fastening in fuel cell manufacturing, and improves fuel cell performance by having high conductivity.

As described above, the present invention has been described by way of a limited embodiment, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains may make various modifications and variations from this description. Do. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

Claims (11)

100 parts by weight of graphite powder; 0.2 to 10 parts by weight of carbon black; And A high temperature composite resin separator raw material composition for a fuel cell comprising 0.1 to 40 parts by weight of cyanate ester resin. The method of claim 1, The graphite powder is a high-temperature composite resin separator raw material composition for a fuel cell, characterized in that the graphite (graphite) having a columnar shape having an aspect ratio of 1.5 to 2. The method of claim 1, The carbon black has a high surface type composite resin separator raw material composition for a fuel cell, characterized in that the specific surface area of 50 to 100 m ² / g. The method of claim 1, The cyanate ester resin may be a phenol novolac-based cyanate ester resin, a biphenol-based dicyanate ester resin, or a bisphenol A-type dicyanate ester. at least one resin selected from the group consisting of -based dicyanate ester resins, bisphenol E-based dicyanate ester resins, and bisphenol F-based dicyanate ester resins. High temperature composite resin separator raw material composition for a fuel cell comprising a. The method of claim 1, The cyanate ester resin is 0.05 to 20 parts by weight, the composite resin separator raw material composition is a high temperature type composite resin separator raw material composition for a fuel cell, characterized in that it further comprises 0.05 to 20 parts by weight epoxy resin. The method of claim 1, The composite resin separator raw material composition is a high temperature composite resin separator raw material composition for a fuel cell, characterized in that it further comprises 0.01 to 1 part by weight of a curing accelerator. The method of claim 6, The curing accelerator is a group of transition metal complexes in which metals of cobalt, copper, manganese, lead, nickel, and zinc exist in the form of acetylacetonate, octoate, and naphthenate. High temperature composite resin separator raw material composition for a fuel cell, characterized in that it comprises at least one curing accelerator selected from. The method of claim 1, The composite resin separator raw material composition is a high temperature composite resin separator raw material composition for a fuel cell, characterized in that it further comprises 0.1 to 3 parts by weight of a release agent. A high temperature composite resin separator for a fuel cell, comprising a cross-linked structure of phenolic triazine. The method of claim 9, The network structure of the phenolic triazine is a high-temperature composite resin separator plate for a fuel cell, characterized in that the phenolic cyanate ester polymer is formed by thermal crosslinking and comprises a unit structure represented by the following formula (1). [Formula 1]

The method of claim 9, The fuel cell composite resin separator further comprises an oxazoline structure formed by reacting an epoxy group and a cyanate group.

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