KR101807189B1 - Method for Manufacturing for Ni/P Alloy Plated Polyacrylonitrile Fiber by Electroless Plating Method and Bipolar Plate for Fuel Cells Using the Same - Google Patents

Abstract

The present invention relates to a method for manufacturing polyacrylonitrile fiber plated with a nickel-phosphorus alloy using an electroless plating method, comprising: a first step of putting polyacrylonitrile fiber of a micro-sized diameter cut in a predetermined length and a metal precursor into a reactor to apply a metal nano-particle to the polyacrylonitrile fiber; and a second step of electroless plating the polyacrylonitrile fiber where the metal-nano particle manufactured in the first step is adopted with a nickel-phosphorus alloy. The present invention relates to a fuel cell separation plate having an epoxy-carbon composite and a nickel-phosphorus alloy-plated polyacrylonitrile fiber manufactured by using the method.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for producing a polyacrylonitrile fiber plated with a nickel / phosphorus alloy by an electroless plating method and a fuel cell separator manufactured using the method. Cells Using the Same}

The present invention relates to a method for producing a polyacrylonitrile fiber plated with a nickel / phosphorus alloy by an electroless plating method, and a composite material separator for a fuel cell manufactured using the method. More particularly, the present invention relates to a method for producing a polyacrylonitrile fiber, comprising the steps of: introducing polyacrylonitrile fibers having a micro-sized diameter cut into a predetermined length together with a metal precursor into a reactor to obtain polyacrylonitrile fibers into which metal nanoparticles are introduced; And a second step of electroless plating the polyacrylonitrile fiber into which the obtained metal nanoparticles are introduced with a nickel / phosphorus alloy, and a method for manufacturing the nickel / phosphorus alloyed polyacrylonitrile fiber by electroless plating Nickel-phosphorus-plated polyacrylonitrile fibers and epoxy-carbon composites produced by using the nickel / phosphorus alloy plating.

Recently, fossil energy resources and environmental pollution problems are continuing to arise. As an alternative to this, researches on alternative energy sources that do not use fossil fuels and have almost no pollutants are being continued all over the world.

Among these alternative energy sources, a fuel cell is a fuel cell which is produced by modifying a hydrocarbon such as hydrogen (H2) gas or methanol and formic acid, It is a device that directly converts the chemical energy of fuel into electric energy, and there is no generation of pollutants due to combustion of fuel like thermal power generation. In addition, unlike a chemical cell that performs a cell reaction in a closed system, a reactant is continuously supplied from the outside, and reaction products are continuously removed from the system, thus attracting attention as a clean and efficient electric energy source.

Such fuel cells include a phosphoric acid fuel cell (PAFC) using a phosphoric acid aqueous solution as an electrolyte, a molten carbonate fuel cell (MCFC) using a molten carbonate as an electrolyte, a yttrium stabilized fuel cell A solid oxide fuel cell (SOFC) used as a zirconia electrolyte, and a solid polymer fuel cell (PEFC) that generates energy by moving both materials in a thin film made of a solid polymer polymer .

The solid polymer type fuel cell, which is one type of the fuel cell, generates hydrogen ions (H +) and electrons through an oxidation reaction at an anode, and generated electrons flow through an external circuit and hydrogen ions It moves to a cathode through a polymer electrolyte membrane and reacts with oxygen to be reduced to generate electric energy.

In the fuel cell, the separation plate can uniformly supply hydrogen to the active region through the anode-side flow path, uniformly supply oxygen or air to the active region through the cathode-side flow path, And it should be possible to easily make various passages.

A graphite plate was mainly used as a separation plate of a conventional polymer electrolyte fuel cell. For example, Korean Patent Registration No. 1371337 discloses a carbon fiber cloth separator for fuel cells and a method of manufacturing the same, wherein at least two or more carbon fiber fabrics made of carbon fiber and stacked and two or more carbon fiber cloth And a polymer matrix applied between the two or more carbon fiber fabrics to expose the carbon fibers to the surface of the separator. Such a graphite separator has advantages of excellent electrical conductivity and good corrosion resistance, but since the fuel and air channels of the graphite separator are mainly formed by machining, the production cost for processing is expensive, The graphite separator has pores and has problems such as gas permeability. In addition, the graphite separator is liable to be damaged due to the nature of the material, so that it is difficult to process the graphite separator into a thin thickness. There is a physical limitation in reducing the stack thickness of the fuel cell composed of several tens to several hundred unit cells.

 In addition, the separator should have good conductivity to be electrically energized with the neighboring cells and to exhibit excellent mechanical strength. Particularly, in the portion where the flow path is formed, the cross sectional area is reduced by about 50%, so that the electrical resistance is increased at this portion and the mechanical strength is greatly reduced.

Korean Patent Laid-Open Publication No. 2016-0033269 discloses a separation plate for a fuel cell and a method for manufacturing the same, wherein a carbon fiber, which is interwoven with a weft and a slope, is impregnated with a thermoplastic resin, . However, since the content of the carbon fiber is in the range of 50 to 95 parts by weight, the present technique has a problem that it is difficult to make the thickness of the separator plate thin because of low mechanical strength and a large volume of carbon particles.

Therefore, in order to solve the problems of the conventional technology in the automotive parts market, there is a continuing need for a separator for a fuel cell having improved electrical conductivity and mechanical strength.

The inventors of the present invention have continued to carry out research on a method of synthesizing polyacrylonitrile fibers plated with a nickel / phosphorus alloy by the electroless plating method in order to solve the problems of the prior art as described above, and completed the present invention.

Accordingly, an object of the present invention is to provide an epoxy-carbon-nickel / phosphorus alloy-coated polyacrylonitrile fiber composite having improved electrical conductivity and mechanical strength, which can be applied to a separator for fuel cells.

In order to achieve the above object, the present invention provides a method for producing a nickel / phosphorus alloyed polyacrylonitrile fiber by electroless plating.

The present invention provides a separator for a fuel cell using a nickel / phosphorus alloyed polyacrylonitrile fiber and an epoxy-carbon composite produced by the nickel / phosphorus alloyed polyacrylonitrile fiber manufacturing method by the electroless plating method.

The nickel / phosphorus alloyed polyacrylonitrile fiber manufacturing method according to the present invention improves the wettability of the polyacrylonitrile fiber and the electroless plating solution in which the metal nanoparticles are dispersed on the surface in the process, The nitrile fiber can be well dispersed in the electroless plating solution and the effect of improving the interfacial bonding strength between the nickel / phosphorus alloy and the polyacrylonitrile fiber can be provided.

Further, the nickel / phosphorus alloy plated polyacrylonitrile fiber and the epoxy-carbon composite produced by the nickel / phosphorus alloy plating polyacrylonitrile fiber manufacturing method according to the electroless plating method of the present invention and the nickel / phosphorus alloy plated polyacryl A separator for a fuel cell comprising a ronitryl fiber and an epoxy-carbon composite can provide an effect of improving electrical conductivity and mechanical strength.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of a method for producing a polyacrylonitrile fiber plated with a nickel / phosphorus alloy according to the present invention. Fig.
FIG. 2 is a TEM photograph of Pd nanoparticles prepared by introducing palladium (II) acetylacetonate into polyacrylonitrile fibers according to Example 1. FIG.
3 is an SEM photograph and an EDS analysis result of the polyacrylonitrile fiber in which the Pd nanoparticles prepared according to Example 1 are dispersed on the surface.
4 is a SEM photograph of a nickel / phosphorus alloyed polyacrylonitrile fiber plated on the surface of a polyacrylonitrile fiber in which Pd nanoparticles are dispersed in Example 1: (a) 350x magnification, (b) 1,600x magnification , (c) 6,500 times magnification.
FIG. 5 is a SEM photograph and an EDS analysis result of the nickel / phosphorus alloyed polyacrylonitrile fiber plated on the surface of the polyacrylonitrile fiber dispersed with the Pd nanoparticles prepared according to Example 1. FIG.
6 is an XPS analysis result of a polyacrylonitrile fiber in which Pd nanoparticles prepared according to Example 1 are dispersed on a surface and a polyacrylonitrile fiber plated with nickel / phosphorus alloy thereon.
7 is a SEM photograph of a nickel / phosphorus alloyed polyacrylonitrile fiber with increasing plating time according to Example 2: (a) 10 minutes, (b) 30 minutes, (c) 60 minutes.
7 (a '), (b') and (c ') are SEM photographs of a nickel / phosphorus alloy in which polyacrylonitrile fibers were removed by pyrolysis in order to measure a change in plating thickness of nickel / phosphorus alloy.
8 (a) is a TEM photograph of Ni nanoparticles prepared by introducing nickel (II) acetylacetonate (nickel (II) acetylacetonate) into polyacrylonitrile fiber according to Example 3, 8A is an SEM photograph of a polyacrylonitrile fiber obtained by plating a surface of a polyacrylonitrile fiber with a nickel / phosphorus alloy.
9 (a) is a TEM photograph of Pt nanoparticles prepared by introducing platinum (II) acetylacetonate (platinum (II) acetylacetonate) into polyacrylonitrile fibers according to Example 4. FIG. 9 9A is an SEM photograph of a polyacrylonitrile fiber obtained by plating a surface of a polyacrylonitrile fiber with a nickel / phosphorus alloy.
10 is a comparative graph of electrical conductivity and flexural strength results of the epoxy-carbon-nickel / phosphorus alloy plated polyacrylonitrile fiber composite according to Example 5. Fig.

The present invention relates to a method for producing polyacrylonitrile fibers plated with a nickel / phosphorus alloy by an electroless plating method and a fuel cell separator manufactured using the method.

The term " polyacrylonitrile (PAN) " used in the present invention is an intermediate product for producing a carbon fiber, which is a final product as a precursor of carbon fibers in general. Such a polyacrylonitrile-based carbon fiber is obtained by wet-spinning, dry-spinning or dry-wet spinning a spinning solution containing a polyacrylonitrile-based polymer as a precursor thereof to obtain a carbon fiber precursor fiber, Converted into chlorinated fibers, and carbonized by heating in an inert atmosphere. These polyacrylonitrile fibers have good stability in the spinning process of the precursor fibers and exhibit their productivity in the firing process for forming carbon fibers and can be provided at low cost.

In the present invention, the term " electroless plating method " refers to a method of self-catalytic nickel plating in which metal nickel is precipitated by using a reducing agent in an aqueous nickel salt solution. As the reducing agent, sodium hypophosphite (precipitation of Ni-P alloy) and dimethylamine boron (precipitation of Ni-B alloy) may be used.

Particularly, in the present invention, sodium diphosphate is used as a reducing agent for plating with a nickel / phosphorus alloy. This electroless plating method is advantageous in that it does not require a rectifier because no electricity is used, it does not need to consider the current distribution, has excellent uniform plating ability, and has increased hardness and wear resistance due to corrosion resistance and heat treatment.

The present invention relates to a method for producing a polyacrylonitrile fiber, comprising the steps of charging a reactor with a metal precursor and a micro-sized polyacrylonitrile fiber cut into a predetermined length to obtain polyacrylonitrile fibers into which metal nanoparticles have been introduced, And a second step of electroless plating the polyacrylonitrile fiber into which the one metal nanoparticle is introduced with a nickel / phosphorus alloy, to a process for producing a nickel / phosphorus alloyed polyacrylonitrile fiber by electroless plating .

In the first step, the metal precursor and the polyacrylonitrile fiber cut into the predetermined length are inserted into the reactor and maintained at 160 to 200 ° C under vacuum for 5 to 15 minutes, so that the metal nanoparticles are introduced To obtain a polyacrylonitrile fiber.

In the second step, the polyacrylonitrile fiber into which the metal nanoparticles have been introduced is placed in an electroless plating solution at 50 to 80 ° C. and allowed to react for 60 to 120 minutes to perform electroless plating with nickel / phosphorus alloy.

The method may further include a step of heat-treating the polyacrylonitrile fiber plated with the nickel / phosphorus alloy produced in step 2 in a nitrogen atmosphere at 230 to 270 ° C for 15 to 45 minutes.

The polyacrylonitrile fibers can be 0.1 to 5 cm in length. Preferably 0.7 to 3 cm. More preferably 0.8 to 2 cm. Particularly, when the length of the polyacrylonitrile fiber is less than 0.1 cm, the fiber length is too short to have excellent conductivity. When the length exceeds 5 cm, the polyacrylonitrile fiber is not dispersed and is not dispersed.

In the first step, the metal precursor may include palladium (II) acetylacetonate, platinum (II) acetylacetonate, and nickel (II) acetylacetonate (nickel (II) acetylacetonate), cobalt (II) acetylacetonate, and the like. However, the present invention is not limited thereto.

The electroless plating solution in the second step is prepared by adding 5 to 7 g of nickel sulfate hexahydrate as a nickel source to 50 to 70 ml of distilled water, 5 to 10 g of sodium hypophosphite monohydrate as a reducing agent, 5 to 10 g of lactic acid as a complexing agent, , Adjusting the pH to 4 to 5 with 0.1 mol NaOH solution, and mixing 20 to 40 ml of ethanol.

Preferably, the second electroless plating solution is prepared by dissolving 6.3 g of nickel sulfate hexahydrate as a nickel source in 60 ml of distilled water, 7.5 g of sodium hypophosphite monohydrate as a reducing agent, 8.1 g of lactic acid as a complexing agent, 6.6 g of propionic acid as a buffer , Adjusted to pH 4.5 with 0.1 mol NaOH solution, and mixed with 30 ml of ethanol.

Further, in order to improve the interfacial bonding strength between the nickel / phosphorus alloy and the polyacrylonitrile fiber, the polyacrylonitrile fiber plated with the nickel / phosphorus alloy prepared in the above step 2 is subjected to a heat treatment in a nitrogen atmosphere at 230 to 270 DEG C for 15 to 45 minutes And a heat treatment step.

Further, the present invention can produce a separator for a fuel cell, comprising a nickel / phosphorus alloyed polyacrylonitrile fiber and an epoxy-carbon composite produced by a manufacturing method comprising the above-described contents.

Preferably, the fuel cell separator comprises 10 to 40 parts by weight of powdered epoxy, 45 to 70 parts by weight of particulate graphite, 1 to 70 parts by weight of carbon fiber, 0.1 to 10 parts by weight of nickel / phosphorus alloy plated polyacrylonitrile fibers per part to 5 parts by weight.

The epoxy resin contained in the nickel / phosphorus alloyed polyacrylonitrile fiber and the epoxy-carbon composite may be at least one thermosetting resin selected from phenol resin, melamine resin and vinyl ester resin, or polyphenylene sulfide, polyvinylidene fluoride But are not limited to, one or more thermoplastic resins selected from polyamide, polybutylene terephthalate, polyimide, liquid crystal polymer, polybenzimidazole and polyetheretherketone (PEEK).

      Hereinafter, the present invention will be described in more detail with reference to Examples and Experimental Examples. However, these examples are for illustrative purposes only, and the scope of the present invention is not limited to these examples.

Example 1 Preparation of nickel / phosphorus alloyed polyacrylonitrile fiber using palladium (II) acetylacetonate as a metal precursor (1)

0.05 mg of palladium (II) acetylacetonate (Palladium (II) acetylacetonate) and 10 mg of 1-cm-length polyacrylonitrile fiber were placed in a glass reactor and maintained at 180 ° C. for 5 minutes under vacuum condition to obtain polyacrylonitrile After preparing the ronitryl fiber, it was placed in an electroless plating solution at 80 占 폚 and allowed to react for 30 minutes to plated nickel / phosphorus alloy on the polyacrylonitrile fiber. The composition of the electroless plating solution was 6.3 g of nickel sulfate hexahydrate (nickel source), 7.5 g of sodium hypophosphite monohydrate (reducing agent), 8.1 g of lactic acid (complexing agent) and 6.6 g of propionic acid (buffering agent) After adjusting the pH to 4.5 with 0.1 mol NaOH solution, 30 mL of ethanol was mixed and used. The prepared nickel / phosphorus alloyed polyacrylonitrile fibers were thermally treated in a nitrogen atmosphere at 250 ° C for 30 minutes to improve the interfacial bonding strength between the nickel / phosphorus alloy and the polyacrylonitrile fiber. To evaluate the properties thereof, FE-SEM / EDS analysis was used to observe the morphology of the nickel / phosphorus alloyed polyacrylonitrile fibers and evaluate their chemical composition. These results are shown in Figs. 2 to 6.

The results of Example 1 show that the production of nickel / phosphorus alloyed polyacrylonitrile fibers using palladium (II) acetylacetonate improves the thickness of the nickel / phosphorus alloy plating film as the reaction time increases And it was confirmed that the electrical conductivity was improved.

Example 2 Preparation of nickel / phosphorus alloyed polyacrylonitrile fiber using palladium (II) acetylacetonate (Palladium (II) acetylacetonate) as a metal precursor (2)

0.15 mg of palladium (II) acetylacetonate (Palladium (II) acetylacetonate) and 30 mg of 1-cm-length polyacrylonitrile fiber were placed in a glass reactor and maintained at 180 ° C. for 5 minutes under vacuum to prepare polyacrylonitrile Ronitril fibers were prepared. Then, 10 mg of the solution was separated into three reaction vessels, placed in an electroless plating solution at 80 ° C., and reacted for 10 minutes, 30 minutes, and 60 minutes, respectively, so as to deposit nickel / phosphorus alloy on the polyacrylonitrile fiber. Here, the composition of the electroless plating solution was the same as that in Example 1. The prepared nickel / phosphorus alloyed polyacrylonitrile fibers were thermally treated in a nitrogen atmosphere at 250 ° C for 30 minutes to improve the interfacial bonding strength between the nickel / phosphorus alloy and the polyacrylonitrile fiber. To evaluate the properties thereof, FE-SEM / EDS analysis was used to observe the morphology of the nickel / phosphorus alloyed polyacrylonitrile fibers and evaluate their chemical composition.

The results of Example 2 show that the preparation of nickel / phosphorus alloyed polyacrylonitrile fibers using palladium (II) acetylacetonate increases the thickness of the nickel / phosphorus alloy plating as the reaction time increases And it was confirmed that the electrical conductivity was improved.

Example 3 Preparation of nickel / phosphorus alloyed polyacrylonitrile fiber using nickel (II) acetylacetonate (Ni) (II) acetylacetonate as a metal precursor (1)

0.05 mg of nickel (II) acetylacetonate (Nickel (II) acetylacetonate) and 10 mg of 0.5 mm-length polyacrylonitrile fiber were placed in a glass reactor and maintained at 180 ° C. for 15 minutes under a vacuum condition. After the acrylonitrile fiber was prepared, it was placed in an electroless plating solution at 60 占 폚 and reacted for 120 minutes to plated nickel / phosphorus alloy on the polyacrylonitrile fiber. Here, the composition of the electroless plating solution was the same as that in Example 1. The prepared nickel / phosphorus alloyed polyacrylonitrile fibers were thermally treated in a nitrogen atmosphere at 250 ° C for 30 minutes to improve the interfacial bonding strength between the nickel / phosphorus alloy and the polyacrylonitrile fiber. To evaluate the properties thereof, FE-SEM / EDS analysis was used to observe the morphology of the nickel / phosphorus alloyed polyacrylonitrile fibers and evaluate their chemical composition.

The results of Example 3 demonstrate that nickel / phosphorus alloyed polyacrylonitrile fiber fabrication using palladium (II) acetylacetonate (Nickel (II) acetylacetonate) ), But it was confirmed that it is possible even if the effect is small.

Example 4 Preparation of nickel / phosphorus alloyed polyacrylonitrile fiber using platinum (Ⅱ) acetylacetonate as a metal precursor (2)

0.05 mg of platinum (Ⅱ) acetylacetonate and 10 mg of 0.5 mm long polyacrylonitrile fiber were placed in a glass reactor and maintained at 180 ° C. for 15 minutes under vacuum condition to obtain a poly After the acrylonitrile fiber was prepared, it was placed in an electroless plating solution at 60 占 폚 and reacted for 240 minutes to plated nickel / phosphorus alloy on the polyacrylonitrile fiber. Here, the composition of the electroless plating solution was the same as that in Example 1. The prepared nickel / phosphorus alloyed polyacrylonitrile fibers were thermally treated in a nitrogen atmosphere at 250 ° C for 30 minutes to improve the interfacial bonding strength between the nickel / phosphorus alloy and the polyacrylonitrile fiber. To evaluate the properties thereof, FE-SEM / EDS analysis was used to observe the morphology of the nickel / phosphorus alloyed polyacrylonitrile fibers and evaluate their chemical composition.

The results of Example 3 above show that the production of nickel / phosphorus alloyed polyacrylonitrile fibers using platinum (II) acetylacetonate was achieved by using palladium (II) acetylacetonate (Palladium (II) acetylacetonate ), But it was confirmed that it is possible even if the effect is small.

Example 5 Production of a cured product of a nickel / phosphorus alloy plated polyacrylonitrile fiber composite

0 to 10 g of a nickel / phosphorus alloy plated polyacrylonitrile fiber prepared by synthesizing 60 g of the powder of epoxy in 30 g of the particulate graphite, 65 g of the graphite graphite, and 3 g of carbon fiber were added to a mechanical stirrer Lt; / RTI > The thus mixed powdery epoxy-graphite-nickel / phosphorus alloy-coated polyacrylonitrile fiber composite was put into a mold, and then a plate-shaped cured product was prepared by a heat compression curing reaction. The electrical conductivity of the cured body was measured by the 4-point probe method, and the flexural strength was measured at a crosshead speed of 10 mm / min using a universal testing machine.

Through the above Example 5, an epoxy-carbon-nickel / phosphorus alloy-coated polyacrylonitrile fiber composite having improved electrical conductivity and mechanical strength over the prior art could be produced.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. It will be understood that the present invention can be changed.

 It is an object of the present invention to provide an epoxy-carbon-nickel / phosphorus alloy-coated polyacrylonitrile fiber composite having improved electrical conductivity and mechanical strength which can be applied to a separator for a fuel cell, .

Claims (10)

A first step of adding a metal precursor and a micro-sized polyacrylonitrile fiber cut to 0.1 to 5 cm into the reactor to obtain a polyacrylonitrile fiber into which the metal nanoparticles are introduced; And
And a second step of electroless plating the polyacrylonitrile fiber having the metal nanoparticles obtained in the first step with a nickel / phosphorus alloy,
The method of claim 1, further comprising the step of heat treating the polyacrylonitrile fiber plated with the nickel / phosphorus alloy produced in step 2 in a nitrogen atmosphere at 230 to 270 캜 for 15 to 45 minutes. Phosphorus-plated polyacrylonitrile fibers. The method according to claim 1,
In the first step, the metal precursor and the micro-sized polyacrylonitrile fibers cut to 0.1 to 5 cm are introduced into the reactor and maintained at a temperature of 160 to 200 ° C under a vacuum condition for 5 to 15 minutes, To obtain a polyacrylonitrile fiber, wherein the polyacrylonitrile fiber is obtained by electroless plating. The method according to claim 1,
Wherein the polyacrylonitrile fibers into which the metal nanoparticles have been introduced are placed in an electroless plating solution at 50 to 80 DEG C for 60 to 120 minutes to conduct electroless plating with a nickel / phosphorus alloy, Method of manufacturing nickel / phosphorus alloy plated polyacrylonitrile fiber by electrolytic plating method. delete delete The method according to claim 1,
In the first step, the metal precursor is selected from the group consisting of sublimable palladium (II) acetylacetonate, platinum (II) acetylacetonate and nickel (II) acetylacetonate, cobalt (II) acetylacetonate Wherein the nickel / phosphorus alloy-coated polyacrylonitrile fiber is at least one selected from the group consisting of nickel and phosphorus. The method of claim 3,
The electroless plating solution in the second step is prepared by adding 5 to 7 g of nickel sulfate hexahydrate as a nickel source to 50 to 70 ml of distilled water, 5 to 10 g of sodium hypophosphite monohydrate as a reducing agent, 5 to 10 g of lactic acid as a complexing agent, And adjusting the pH to 4 to 5 with 0.1 mol of NaOH solution and then mixing 20 to 40 ml of ethanol to prepare a nickel / phosphorus alloyed polyacrylonitrile fiber by electroless plating. The method of claim 3,
The electroless plating solution in the second step was prepared by adding 6.3 g of nickel sulfate hexahydrate as a nickel source to 60 ml of distilled water, 7.5 g of sodium hypophosphite monohydrate as a reducing agent, 8.1 g of lactic acid as a complexing agent and 6.6 g of propionic acid as a buffer, NaOH solution to pH 4.5, and then mixing 30 ml of ethanol. The method for producing nickel / phosphorus alloyed polyacrylonitrile fiber according to the electroless plating method. A separator for a fuel cell comprising a nickel / phosphorus alloy plated polyacrylonitrile fiber and an epoxy-carbon composite prepared by the method of any one of claims 1 to 3 and 6 to 8. 10. The method of claim 9,
Wherein the fuel cell separator comprises 10 to 40 parts by weight of powdered epoxy, 45 to 70 parts by weight of particulate graphite, 1 to 5 parts by weight of carbon fiber, and 0.1 part by weight of nickel / phosphorus alloy plated polyacrylonitrile fiber To 10 parts by weight based on the total weight of the separator.

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