WO2017006741A1 - 燃料電池用通電部材、燃料電池セル、燃料電池スタック、及び燃料電池用通電部材の製造方法 - Google Patents
燃料電池用通電部材、燃料電池セル、燃料電池スタック、及び燃料電池用通電部材の製造方法 Download PDFInfo
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- WO2017006741A1 WO2017006741A1 PCT/JP2016/067991 JP2016067991W WO2017006741A1 WO 2017006741 A1 WO2017006741 A1 WO 2017006741A1 JP 2016067991 W JP2016067991 W JP 2016067991W WO 2017006741 A1 WO2017006741 A1 WO 2017006741A1
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- plating layer
- fuel cell
- protective film
- metal plating
- base material
- Prior art date
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- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
- H01M8/2425—High-temperature cells with solid electrolytes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0223—Composites
- H01M8/0228—Composites in the form of layered or coated products
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1646—Characteristics of the product obtained
- C23C18/165—Multilayered product
- C23C18/1651—Two or more layers only obtained by electroless plating
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1689—After-treatment
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
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- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
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- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a fuel cell energization member, a fuel cell, a fuel cell stack, and a method for producing a fuel cell energization member.
- a current-carrying member such as a fuel cell current collector plate or a fuel cell separator is used as a member for collecting generated electricity.
- the fuel cell current collector plate is a member that is provided at both ends of the fuel cell constituting the fuel cell stack, and extracts current from the fuel cell stack.
- a fuel cell separator is used as a member of a fuel cell constituting a fuel cell stack, and has a function of supplying fuel gas and air to an electrode through a gas flow path, and a function of collecting electrons generated at the electrode It is.
- a fuel cell separator formed by forming a gas flow path in a carbon plate has been used as such a fuel cell energizing member.
- Patent Document 1 a metal substrate and a gold plating layer made of a predetermined metal are formed on a base material by electrolytic plating using a base material made of metal as a base material of a fuel cell separator.
- a fuel cell separator is disclosed.
- the fuel cell separator disclosed in Patent Document 1 there may be a minute defect such as a pinhole in the gold plating layer or the metal layer. May be partially exposed.
- a minute defect such as a pinhole in the gold plating layer or the metal layer. May be partially exposed.
- a large amount of components that form the base material and the metal layer are eluted from the pinhole portion. Therefore, there is a problem that the performance as a fuel cell may be lowered.
- the configuration of the fuel cell separator disclosed in Patent Document 1 that is, the configuration in which a metal layer and a gold plating layer made of a predetermined metal are formed on a base material, is a current collector plate for a fuel cell. Even when applied to the fuel cell, the current collector plate for a fuel cell has a problem that the corrosion resistance of the portion where the pinhole is generated is lowered and the performance as a fuel cell may be lowered.
- An object of the present invention is to provide a current-carrying member for a fuel cell in which elution of a base material and a metal layer is effectively suppressed and corrosion resistance is excellent.
- the present inventors have formed a protective film using a protective film forming agent on a surface-treated base material formed by forming at least one metal plating layer on the base material, and then, by performing acid treatment, The inventors have found that the object can be achieved and have completed the present invention.
- a protective film forming agent is used on a surface-treated base material comprising a base material and at least one metal plating layer formed on the base material. After the protective film is formed on the fuel cell, the fuel cell energization member is provided that is subjected to acid treatment.
- the protective film forming agent preferably contains a mixture of a compound having a thiol group and an azole compound and / or an azole compound having a thiol group.
- the acid treatment is preferably a treatment using sulfuric acid or nitric acid.
- the electricity supply member for fuel cells further comprises a gold plating layer on the metal plating layer.
- the said base material consists of steel materials or aluminum materials.
- the current-carrying member for a fuel cell is preferably a fuel cell separator or a fuel cell current collector.
- a fuel battery cell using the above-described fuel cell energization member is provided.
- a fuel cell stack formed by stacking a plurality of the above fuel cell cells.
- the process of forming at least one metal plating layer on the base material, and the base material on which the metal plating layer is formed are subjected to the protective film forming treatment using the protective film forming agent.
- a method for producing a current-carrying member for a fuel cell comprising: a step; and a step of performing an acid treatment on a substrate subjected to the protective film formation treatment.
- the step of forming at least one metal plating layer on the substrate, the step of forming a gold plating layer on the metal plating layer, the metal plating layer and the gold plating layer are provided.
- a fuel cell comprising: a step of performing a protective film forming process using a protective film forming agent on the formed base material; and a step of performing an acid treatment on the base material subjected to the protective film forming process
- a method for manufacturing a current-carrying member is provided.
- the apparatus includes a base material and a metal plating layer formed on the base material, and the gold plating layer is formed on at least a part of the exposed surface of the gold plating layer.
- a fuel cell energization member comprising a protective film formed by using a passive film formed by acid treatment on at least a part of an exposed surface of the base material.
- the elution of the base material and the metal plating layer can be effectively suppressed, thereby providing a fuel cell energization member having excellent corrosion resistance.
- FIG. 3 is a perspective view showing a fuel cell stack in which the fuel cells of FIGS. 1 and 2 and a fuel cell current-carrying member (current collector plate) are stacked. It is a disassembled perspective view which shows the fuel cell stack of FIG. 3A. It is sectional drawing which shows an example of the surface treatment base material for forming the electricity supply member for fuel cells of this invention. It is a principal part enlarged view of the part shown by V of the surface treatment base material 10 shown in FIG. FIG.
- FIG. 5 is an enlarged view of a main part of a portion indicated by V in FIG. 4 when a protective film forming process using a protective film forming agent is performed on the surface treatment substrate 10 illustrated in FIG. 4. It is a principal part enlarged view of the part shown by V in FIG. 4 at the time of performing the protective film formation process using a protective film formation agent, and the acid process with respect to the surface treatment base material 10 shown in FIG. It is sectional drawing which shows the surface treatment base material which concerns on another embodiment of this invention. It is sectional drawing which shows the surface treatment base material which concerns on another embodiment of this invention. It is a graph which shows the result of having evaluated corrosion resistance about the electricity supply member for fuel cells of an example and a comparative example. It is a figure for demonstrating the method to measure an electrical resistance about the electricity supply member for fuel cells of an Example and a comparative example.
- FIG. 1 is a cross-sectional view showing a fuel cell 2 as a structural unit of the fuel cell stack 3
- FIG. 2 is an exploded perspective view showing the fuel cell 2
- FIG. 3A is a fuel cell energization member (separator) 1 respectively.
- FIG. 3B is an exploded perspective view illustrating the fuel cell stack 3.
- FIG. 3B is an exploded perspective view illustrating the fuel cell stack 3.
- the fuel cell 2 of the present embodiment includes an electrolyte membrane 21, an anode 22 and a cathode 23, and fuel cell current-carrying members (separators) 1 and 1.
- the anode 22 and the cathode 23 are gas diffusion electrodes having a sandwich structure with the electrolyte membrane 21 sandwiched from both sides.
- the fuel cell current-carrying members (separators) 1 and 1 are supplied with fuel gas and oxidant gas to the anode 22 and the cathode 23 while sandwiching the sandwich structure from both sides, and the electric power generated by the electrochemical reaction. Aggregate.
- a fuel gas channel 1A is formed between the anode 22 and the fuel cell energizing member (separator) 1, and an oxidizing gas channel 1C is formed between the cathode 23 and the fuel cell energizing member (separator) 1. Is formed.
- a predetermined number of the fuel cells 2 are stacked, and the predetermined number of fuel cells are further energized for fuel cells from both sides. It is sandwiched between members (current collector plates) 31. Then, a fuel gas containing hydrogen is supplied to the anode 22 of the fuel battery cell 2 and an oxidizing gas containing oxygen is supplied to the cathode 23, whereby an electrochemical reaction proceeds at each of the anode 22 and the cathode 23.
- the electric power generated by the above is further concentrated by the fuel cell energization member (current collector plate) 31 while being aggregated by the fuel cell energization members (separators) 1 and 1 described above.
- the fuel cell current-carrying members (separators) 1 and 1 and the fuel cell current-carrying member (current collector plate) 31 are both members that are required to be electrically conductive. It can be used for a fuel cell current-carrying member (separator) 1 or a fuel cell current-carrying member (current collector plate) 31.
- the current-carrying member for the fuel cell according to this embodiment will be described.
- the fuel cell energizing member of the present embodiment is applicable to the fuel cell energizing member (separator) 1 and the fuel cell energizing member (current collector plate) 31 as described above.
- the current-carrying member for a fuel cell according to the present embodiment performs a protective film forming process using a protective film forming agent, which will be described later, and an acid process on the surface-treated substrate 10 having the configuration shown in FIG. It is formed by performing in order.
- the surface treatment base material 10 is formed by forming a gold plating layer 13 on the metal plating layer 12 formed on the base material 11 as the outermost layer.
- the outermost surface layer of the surface treatment substrate 10 is the gold plating layer 13 is shown.
- the gold plating layer 13 may not be formed on the surface treatment substrate 10.
- the metal plating layer 12 constitutes the outermost layer of the surface treatment substrate 10.
- the thickness of the substrate 11 is not particularly limited, but is preferably 0.05 to 2.0 mm, and preferably 0.1 to 0.3 mm.
- the base material 11 of this embodiment When the base material 11 of this embodiment is used for the application of a separator for a fuel cell, it is preferable to use a substrate in which irregularities (gas flow paths) that function as flow paths for fuel gas and air are formed on the surface in advance.
- a method for forming the gas flow path is not particularly limited, and for example, a method of forming by a press working can be mentioned.
- the base material 11 of this embodiment is used for the use of a collector plate for a fuel cell, a method of forming a flat plate of the base material 11 into a predetermined shape by press working can be mentioned.
- the metal plating layer 12 is a layer formed on the surface of the base material 11, and when the gold plating layer 13 is formed thereon as shown in FIG. This is a layer that acts as an underlayer for the film. Or when not forming the gold plating layer 13, it becomes a layer which comprises the outermost layer of the electricity supply member for fuel cells.
- the metal plating layer 12 may be only one layer, may be two or more layers, and in the case of two or more layers, the components constituting each layer may be different, or It may be the same.
- the metal plating layer 12 for example, at least one element selected from Ni, Fe, Co, Cu, Zn, Sn, Pd, Re, Pt, Rh, Ag, and Ru, and these elements and , P or B and the like. These elements constituting the metal plating layer 12 may be contained singly or in combination of two or more, for example, Ni—Pd—P, Ni—P, Pd—P, Ni— An alloy such as Sn may be used, and a Pd—P or Ni—Pd—P alloy is particularly preferable. As the metal plating layer 12, a Ni—Pd—P alloy containing Ni, Pd, and P is preferable from the viewpoint that a protective film forming agent to be described later is easily attached and a protective film can be satisfactorily formed.
- the molar ratio of Ni to Pd (Ni / Pd) is preferably 0.005 to 0.5.
- the metal plating layer 12 can be satisfactorily formed on the substrate 11, and gold plating is applied on the metal plating layer 12.
- the gold plating layer 13 can be formed satisfactorily.
- plating is performed on the substrate 11 using a commonly obtained nickel plating bath and a palladium plating bath.
- the method of giving is mentioned.
- a nickel plating bath for example, a plating comprising a nickel salt such as nickel chloride, nickel sulfate, nickel nitrate and nickel acetate, a reducing agent containing phosphorus such as hypophosphite, and a complexing agent such as citric acid. Examples include baths.
- the palladium plating bath examples include a palladium salt such as palladium chloride, a reducing agent containing phosphorus such as hypophosphite and phosphite, and a plating bath serving as a complexing agent such as thiodiglycolic acid. Can be mentioned.
- a palladium salt such as palladium chloride
- a reducing agent containing phosphorus such as hypophosphite and phosphite
- a plating bath serving as a complexing agent such as thiodiglycolic acid.
- nickel sulfate nickel salt
- palladium chloride it is preferable to use nickel sulfate as the nickel salt and palladium chloride as the palladium salt.
- the mixing ratio of the nickel plating bath and the palladium plating bath may be appropriately set according to the ratio of each element of the Ni—Pd—P alloy constituting the metal plating layer 12.
- the metal plating layer 12 is formed of a Ni—Pd—P alloy is exemplified. However, when the metal plating layer 12 is composed of other elements, the metal plating layer 12 is similarly formed.
- a plating bath prepared by appropriately adjusting a plating bath containing the elements constituting the element and containing a reducing agent and a complexing agent may be used.
- the metal plating layer 12 is preferably formed using the above-described plating bath under the conditions of pH 4.0 to 7.0, bath temperature 30 to 50 ° C., and immersion time 5 to 20 minutes.
- the thickness of the metal plating layer 12 is preferably 0.001 to 1.0 ⁇ m, more preferably 0.01 to 0.2 ⁇ m.
- the gold plating layer 13 can be formed satisfactorily when the gold plating layer 13 is formed on the metal plating layer 12.
- the protective film formation process using the protective film formation agent mentioned later and an acid process are performed, even when the metal plating layer 12 is made thin in this way, it is made thin. It is possible to appropriately suppress the elution of the components constituting the base material 11 from the pinhole portion generated due to the cause. That is, it is possible to appropriately prevent elution from the lower substrate 11 while enabling the metal plating layer 12 to be thinned.
- the crack of the metal plating layer 12 can be prevented effectively. That is, by using the base material 11 in which the gas flow path is formed in advance, it is not necessary to perform a press work or the like for forming the gas flow path after forming the metal plating layer 12, and the pressure such as the press work is reduced. The occurrence of cracks in the resulting metal plating layer 12 can be prevented.
- the adhesiveness of the base material 11 and the metal plating layer 12 is improved.
- a modified layer may be provided.
- the modified layer can be appropriately formed according to the characteristics of the base material 11 and the metal plating layer 12, but from the viewpoint of improving the adhesion with the metal plating layer 12, the elements constituting the metal plating layer 12 It is preferable to use a layer containing the same element.
- the metal plating layer 12 is formed of a Ni—Pd—P alloy
- the modified layer is preferably a Ni-based layer, and such a Ni-based layer is formed by electroless reduction plating.
- a Ni—P plating layer and the like can be mentioned.
- the modified layer may be only one layer or two or more layers. In the case of two or more layers, the components constituting each layer may be different or the same. It may be a thing.
- the method for forming the modified layer is not particularly limited, but it can be formed by electrolytic plating, electroless plating, sputtering, or the like.
- the gold plating layer 13 is a layer formed on the metal plating layer 12 as necessary, and is formed by performing a plating process on the metal plating layer 12.
- a plating process an electroless plating is preferable and an electroless displacement plating process, an electroless reduction plating process, etc. are mentioned.
- the gold plating layer 13 when forming the gold plating layer 13, for example, it may be formed by performing an electroless displacement plating process and further performing an electroless reduction plating process.
- the gold plating layer 13 by forming the gold plating layer 13 by electroless plating, even when the base material on which the gas flow path is formed in advance is used as described above, the uneven portion constituting the gas flow path is used.
- the gold plating layer 13 can be formed in a uniform state.
- the thickness of the gold plating layer 13 is preferably 1 to 200 nm, more preferably 2 to 100 nm.
- the uniform gold plating layer 13 can be formed on the metal plating layer 12, and the corrosion resistance and conductivity of the obtained current-carrying member for a fuel cell can be improved. Can do.
- a protective film forming process using a protective film forming agent, which will be described later, and an acid process are performed, even when the gold plating layer 13 is thinned as described above, The elution of the components constituting the base material 11 and the metal plating layer 12 from the pinhole portion that is caused can be appropriately suppressed. That is, elution from the lower layer base material 11 and the metal plating layer 12 can be appropriately prevented while making the gold plating layer 13 thinner.
- the surface treatment substrate 10 of the present embodiment is configured as described above.
- a current-carrying member for a fuel cell can be obtained by performing a protective film forming process using a protective film forming agent and an acid process in this order on the surface-treated substrate 10. it can.
- the treatment using the protective film forming agent and the acid treatment will be described with reference to FIG. 5 is an enlarged view of a main part of a portion indicated by V in FIG.
- a pinhole or the like may occur in the gold plating layer 13 or the metal plating layer 12, and in this case, the metal plating is performed. There will be an exposed portion where the layer 12 and the base material 11 are exposed. And when such an exposed part exists, in a high-temperature acidic atmosphere etc., the component which comprises the metal plating layer 12 and the base material 11 may elute, and when it uses as an electricity supply member for fuel cells, The performance as a fuel cell may be reduced.
- a protective film forming process using a protective film forming agent and an acid process are performed on the surface-treated substrate 10 shown in FIG. This is done in this order.
- the protective film 14 is formed on at least a part of the exposed portion of the metal plating layer 12 in the surface treatment substrate 10. Form. That is, as shown in the enlarged view of the main part shown in FIG. 6, the metal plating layer 12 is exposed in the metal plating layer 12 by the pinhole of the gold plating layer 13 by processing with the protective film forming agent. A protective film forming agent adheres, whereby the protective film 14 is formed. At this time, the exposed portion of the metal plating layer 12 is preferably substantially entirely formed with the protective film 14, but there may be a portion where the protective film 14 is not formed.
- the protective film 14 is formed on the surface of the metal plating layer 12.
- the surface of the metal plating layer 12 is preferably substantially entirely formed with the protective film 14, but there may be a portion where the protective film 14 is not formed.
- an acid treatment described later is performed, whereby an acid treatment for forming a passive film on the exposed portion of the substrate 11 is performed. It can act as a protective film for the metal plating layer 12.
- the metal plating layer 12 itself is also exposed to a high-temperature acidic atmosphere when the surface-treated substrate 10 is used as a fuel cell current-carrying member of the fuel cell 2. Even so, elution of the metal plating layer 12 can be effectively suppressed.
- a method of treating the surface treatment substrate 10 with the protective film forming agent a method of immersing the surface treatment substrate 10 in the protective film forming agent, a method of spraying the protective film forming agent on the surface treatment substrate 10, or the like. Is mentioned.
- any protective film forming agent may be used as long as it adheres to the metal plating layer 12 and can suppress the elution of the metal plating layer 12, but hardly adheres to the base material 11 or the gold plating layer 13. Those that easily adhere to the plating layer 12 are preferred.
- the protective film forming agent when the metal plating layer 12 contains Ni, it is preferable that the metal plating layer 12 easily adheres to Ni, particularly when the metal plating layer 12 is formed of a Ni—Pd—P alloy. For this, those which are easy to adhere to the Ni—Pd—P alloy are preferable.
- the protective film forming agent it is preferable to use a mixture of a compound having a thiol group and an azole compound, an azole compound having a thiol group, or a combination thereof.
- a triazine thiol type compound, a C10-C20 linear alkane thiol, a pyridine thiol compound, a thiophenol type compound etc. are mentioned. These compounds having a thiol group can be used alone or in combination of two or more.
- azole compound examples include, but are not limited to, a triazole compound, a benzotriazole compound, an imidazole compound, a thiazole compound, and a pyrrole compound.
- a benzotriazole compound is particularly preferable.
- These azole compounds can be used alone or in combination of two or more.
- the azole compound having a thiol group is not particularly limited, and examples thereof include mercaptotriazole compounds, mercaptothiazole compounds, mercaptobenzothiazole compounds, and the like. These azole compounds having a thiol group can be used alone or in combination of two or more.
- the protective film forming agent may further contain a surfactant such as a nonionic surfactant or oil. In using these, neither the kind nor the usage-amount is specifically limited.
- a surfactant such as a nonionic surfactant or oil.
- the protective film forming agent is more easily selectively attached to the metal plating layer 12 than the base material 11 and the gold plating layer 13, and the metal A protective film 14 is formed on the plating layer 12.
- the metal plating layer 12 contains Ni or a Ni—Pd—P alloy
- the nitrogen atom of the azole compound (nitrogen-containing 5-membered ring compound) contained in the protective film forming agent described above is a metal. Since it becomes easy to adhere to Ni etc. of the plating layer 12, the protective film 14 comes to be formed on the metal plating layer 12 more favorably. Thereby, the processability fall of the acid treatment which is mentioned later, and the electroconductive fall of the surface of the surface treatment base material 10 by forming the protective film 14 in the gold plating layer 13 can be suppressed.
- a protective film forming agent that does not easily adhere to the gold plating layer 13 and thereby prevents the protective film 14 from being formed on the surface of the gold plating layer 13.
- a protective film 14 may be formed on the gold plating layer 13 as long as the conductivity of the surface treatment substrate 10 is not significantly reduced. Alternatively, when the protective film 14 is excellent in conductivity, the protective film 14 may be formed on the entire surface of the gold plating layer 13.
- the protective film forming agent it is preferable to use a protective film that does not decompose even when heated to about 300 ° C. after becoming the protective film 14. Accordingly, when the fuel cell energization member on which the protective film 14 is formed is used as a member of the fuel cell 2 or the fuel cell stack 3, the heat resistance of the fuel cell energization member is improved.
- ⁇ Acid treatment> acid treatment is performed on the surface-treated substrate 10 on which the protective film 14 described above is formed.
- a passive film 111 is formed on at least a part of the exposed portion of the substrate 11 in the surface-treated substrate 10 shown in FIG. That is, when there is a portion where the base material 11 is exposed on the base material 11 due to a pinhole or the like of the metal plating layer 12 as shown in the enlarged view of the main part shown in FIG.
- a passive film 111 is formed.
- the exposed portion of the base material 11 is substantially entirely formed with the passive film 111, but there may be a portion where the passive film 111 is not formed.
- the surface-treated base material 10 is used as the fuel cell current-carrying member (separator) 1 of the fuel cell 2 or the fuel cell stack 3 or the fuel.
- the battery current-carrying member (current collector plate) 31 elution of the base material 11 can be effectively suppressed even when exposed to a high-temperature acidic atmosphere.
- the protective film 14 is formed on the metal plating layer 12, and the acid treatment is performed in a state where the metal plating layer 12 is protected by the protective film 14.
- the passive film 111 can be formed on the substrate 11 while suppressing dissolution of the base material 11.
- the gold plating layer 13 of the surface treatment base material 10 is excellent in corrosion resistance to acid in the first place, the gold plating layer 13 is not corroded by acid treatment.
- the method of acid treatment is not particularly limited, and examples thereof include a method of immersing the surface-treated substrate 10 (see FIG. 6) after the protective film formation treatment in an acid.
- the pH during the acid treatment is preferably 4 or less.
- the acid used for the acid treatment is not particularly limited, but sulfuric acid or nitric acid is preferably used from the viewpoint that the passive film 111 can be satisfactorily formed. Specifically, an aqueous sulfuric acid solution or an aqueous nitric acid solution is preferably used.
- the conditions for the acid treatment are preferably a concentration of sulfuric acid in the aqueous sulfuric acid solution of 0.01 to 10% by weight, a temperature of 30 to 90 ° C., and an immersion time of 10 seconds to 48 hours.
- the immersion time is more preferably 10 seconds to 24 hours.
- the conditions for the acid treatment in the nitric acid aqueous solution are preferably a nitric acid concentration of 0.01 to 5% by weight, a temperature of 30 to 90 ° C., and an immersion time of 10 seconds to 60 minutes. .
- a protective film is formed as described above for the surface-treated substrate 10 in which the metal plating layer 12 is formed on the substrate 11 and the gold plating layer 13 is formed as necessary.
- a treatment using an agent and an acid treatment are performed.
- a fuel cell energization member applicable to the members of the fuel cell 2 or the fuel cell stack 3 is obtained.
- the passive film 111 and the protective film 14 are formed in the pinhole portion. It is. Therefore, when the current-carrying member for a fuel cell according to this embodiment is used as a member of the fuel cell 2 or the fuel cell stack 3, the elution of the components that form the base material 11 and the metal plating layer 12 is effectively suppressed, It has excellent corrosion resistance.
- the base material 11 and the metal plating layer 12 are eluted.
- the base material 11 is stainless steel, Fe, Cr, and the like are eluted from the base material 11.
- the metal plating layer 12 is formed of a Ni—Pd—P alloy or the like, Ni, Pd or the like is eluted from the metal plating layer 12.
- the surface-treated substrate 10 of the present embodiment has a passive film 111 formed on a portion of the substrate 11 where the substrate 11 is exposed, and the metal plating layer 12 in the metal plating layer 12. Since the protective film 14 is formed in the portion where 12 is exposed, elution of the base material 11 and the metal plating layer 12 is suppressed.
- the protective film forming agent for forming the protective film 14 as described above, a protective film forming agent that does not easily adhere to the base material 11 or the gold plating layer 13 and easily adheres to the metal plating layer 12 is used. By using it, the protective film 14 can be selectively formed on the metal plating layer 12. Thereby, when the acid treatment is performed after forming the protective film 14, the passive film 111 is satisfactorily formed on the base material 11, and the resulting fuel cell energization member is remarkably improved in corrosion resistance in a high-temperature acidic atmosphere. It can be excellent.
- the base material 11 is stainless steel or the like, it is possible to form the passive film 111 on the exposed portion of the base material 11 by acid treatment or the like in a high-temperature acidic atmosphere. It has been found that it is effective for improving the corrosion resistance when exposed to a long period of time.
- the protective film 14 is formed on the base material 11 of the surface-treated base material 10 in the protective film forming process using the protective film forming agent, the base material 11 may be subjected to acid treatment thereafter. In the portion where the protective film 14 is formed, the passive film 111 is hardly formed. Therefore, in this embodiment, the protective film 14 is selectively formed on the metal plating layer 12 instead of the base material 11, and then the passive film 111 is formed on the base material 11. Thus, the corrosion resistance of the fuel cell current-carrying member can be further improved.
- the protective film 14 is selectively formed on the metal plating layer 12, and the protective film 14 is not formed on the gold plating layer 13, so that the protective film 14 is made of gold. A decrease in the conductivity of the surface of the surface treatment substrate 10 due to being formed on the plating layer 13 can be suppressed.
- the gold plating layer 13 is formed on the surface treatment base material 10.
- the gold plating layer 13 is formed on the surface treatment base material 10. It may not be formed.
- the metal plating layer 12 is formed on the base material 11 as in the fuel cell energization member shown in FIG. 8, and the metal plating layer 12 is formed by the treatment using the protective film forming agent described above. After the protective film 14 is formed on the surface, the passive film 111 is formed on the substrate 11 by the acid treatment described above.
- the protective film 14 is formed on the surface of the metal plating layer 12, it is preferable to use a protective film forming agent that can provide the protective film 14 with excellent conductivity.
- the metal plating layer 12 is, for example, a Ni plating layer 12a like a fuel cell energizing member shown in FIG. And a Ni-Sn alloy layer 12b are preferably formed in this order.
- the fuel cell current-carrying member having such a structure can be made excellent in corrosion resistance and conductivity.
- Ni Pd (molar ratio) in the plating bath which mixed the palladium plating bath and the nickel plating bath was 1.14: 1.0.
- Palladium salt An amount that results in 0.15% by weight of Pd in the palladium plating bath
- Reducing agent 1.8% by weight
- Complexing agent 0.63% by weight
- Nickel salt nickel sulfate
- Reducing agent sodium hypophosphite
- Complexing agent 2.4% by weight
- the base material 11 on which the Ni—Pd—P alloy layer is formed is electroless displacement plated at 70 ° C. for 2 minutes using an electroless displacement gold plating bath (Okuno Pharmaceutical Co., Ltd., Flash Gold NC).
- Ni-Pd-P by applying an electroless reduction plating treatment at 60 ° C. for 2 minutes using an electroless reduction gold plating bath (Okino Pharmaceutical Co., Ltd., Self Gold OTK).
- a gold plating layer 13 having a thickness of 20 nm was formed to obtain a surface-treated substrate 10.
- the obtained surface-treated substrate 10 is immersed in a protective film-forming agent diluted 10% with water under the conditions of 50 ° C. and 1 minute to form the protective film 14 on the surface-treated substrate 10. Then, it was washed with water.
- the surface treatment substrate 10 on which the protective film 14 is formed is immersed in a sulfuric acid aqueous solution having a concentration of 0.049% by weight (pH 2) at 90 ° C. for 24 hours to perform an acid treatment, whereby a surface treatment substrate is formed.
- a passive film 111 (a film formed by combining Cr contained in stainless steel with oxygen) was formed on the base material 11 of the material 10, and then washed with water.
- the surface treatment substrate 10 was evaluated for corrosion resistance. Specifically, the corrosion resistance was evaluated by masking the end surface of the surface-treated substrate 10 with polyimide tape so that the area of 35 mm in length and 30 mm in width was exposed on the front and back, and 90 ° C. sulfuric acid aqueous solution (volume 80 ml, After being immersed in pH: 2) for 100 hours, the surface-treated substrate 10 was taken out, and the concentration of ions (Ni, Pd, P) eluted from the surface-treated substrate 10 into the sulfuric acid aqueous solution was determined by ICP (manufactured by Shimadzu Corporation, ICPE). -9000). The results are shown in FIG.
- the measurement system shown in FIG. 11 includes a test piece of the surface-treated substrate 10, a copper electrode 20 coated with gold plating, and an ohmmeter 30. Specifically, the electrical resistance is measured by first preparing a test piece obtained by processing the surface-treated substrate 10 into a size of 20 mm in width, 20 mm in length, and 0.1 mm in thickness as shown in FIG. The measurement system shown in FIG. 11 was obtained by sandwiching and fixing from both sides with the copper electrode 20 coated with gold plating.
- Example 1 The stainless steel material (SUS316L) used in Example 1 described above was prepared, and for this stainless steel material, the above-described evaluation of corrosion resistance and electrical resistance were performed without forming any of the metal plating layer 12 and the gold plating layer 13. Was measured.
- the corrosion resistance was evaluated by masking SUS316L with a polyimide tape so that an area of 50 mm length and 60 mm width was exposed.
- the electrical resistance was measured by processing SUS316L into a size of 20 mm in width, 20 mm in length, and 0.1 mm in thickness. The results are shown in FIG.
- Comparative Example 1 A surface-treated substrate 10 was produced in the same manner as in Example 1 except that neither the treatment using the protective film forming agent nor the acid treatment was performed, and the corrosion resistance was similarly evaluated. The results are shown in Table 1.
- Comparative Example 2 A surface-treated substrate 10 was prepared in the same manner as in Example 1 except that the acid treatment was not performed, and the corrosion resistance was similarly evaluated. The results are shown in Table 1.
- Example 1 the surface treatment substrate 10 formed by forming the metal plating layer 12 and the gold plating layer 13 on the substrate 11 is subjected to a treatment using a protective film forming agent and an acid treatment.
- Example 1 performed, in the evaluation of corrosion resistance, the elution amount of each element was small, and the corrosion resistance was excellent. Further, from the results in Table 2, in Example 1, even when the surface treatment substrate 10 was treated with a protective film forming agent after the gold plating layer 13 was formed, the electrical resistance The value was small, resulting in excellent conductivity.
- Example 2 The stainless steel material (SUS316L) used in Example 1 described above is prepared, and this stainless steel material is immersed in a 0.049 wt% (pH 2) sulfuric acid aqueous solution at 90 ° C. for 24 hours for acid treatment. Thus, a passive film 111 was formed on the surface of the stainless steel material, and then washed with water.
- the surface of the passive film 111 formed on the AES measurement stainless steel plate is obtained by measuring atomic% of Fe and Cr using a probe Auger electron spectrometer (model number: JAMP-9500F, manufactured by JEOL Ltd.). Based on the results, the Cr / Fe value (Cr atomic% / Fe atomic%) was determined. The results are shown in Table 4.
- Reference Example 3 The same stainless steel material (SUS316L) as that of Reference Example 2 described above was prepared, and the above XPS measurement and AES measurement were performed on this stainless steel material without performing acid treatment. The results are shown in Tables 3 and 4.
- Example 2 The surface-treated substrate 10 was produced in the same manner as in Example 1 described above except that the acid treatment was performed by using a sulfuric acid aqueous solution having a concentration of 1% by weight under conditions of pH 1 or lower, 70 ° C., and 2 minutes. did. And about the produced surface treatment base material 10, the presence or absence of peeling of the gold plating layer 13 was confirmed visually. The results are shown in Table 5.
- Example 3 A surface-treated substrate 10 was prepared in the same manner as in Example 2 described above, except that the acid treatment was performed by using a nitric acid aqueous solution with a concentration of 1% by weight under conditions of pH 1, 70 ° C. and 2 minutes. , Evaluated in the same way. The results are shown in Table 5.
- Comparative Example 3 A surface-treated substrate 10 was prepared in the same manner as in Example 2 described above except that the treatment using the protective film forming agent was not performed, and was similarly evaluated. The results are shown in Table 5.
- Comparative Example 4 A surface-treated substrate 10 was prepared and evaluated in the same manner as in Example 3 described above, except that the treatment using the protective film forming agent was not performed. The results are shown in Table 5.
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Abstract
Description
本発明において、前記酸処理が、硫酸又は硝酸を用いた処理であることが好ましい。
本発明において、燃料電池用通電部材は、前記金属めっき層上に、金めっき層をさらに備えることが好ましい。
本発明において、前記基材が、鋼材又はアルミニウム材からなることが好ましい。
本発明において、前記燃料電池用通電部材は、燃料電池用セパレータまたは燃料電池用集電板であることが好ましい。
また、本発明によれば、上記の燃料電池用セルを複数積層してなる燃料電池スタックが提供される。
また、本発明によれば、基材上に、少なくとも一層の金属めっき層を形成する工程と、前記金属めっき層上に、金めっき層を形成する工程と、前記金属めっき層及び金めっき層を形成した基材に対して、保護膜形成剤を用いて保護膜形成処理を行う工程と、前記保護膜形成処理を行った基材に対して、酸処理を行う工程と、を有する燃料電池用通電部材の製造方法が提供される。
また、本発明によれば、基材と、前記基材上に形成された金属めっき層とを備え、前記金めっき層は、前記金めっき層の露出表面の少なくとも一部に、保護膜形成剤を用いて形成された保護膜を備え、前記基材は、前記基材の露出表面の少なくとも一部に、酸処理により形成された不動態皮膜を備える燃料電池用通電部材が提供される。
本実施形態の燃料電池用通電部材は、図4に示すような構成を有する表面処理基材10に対して、後述する保護膜形成剤を用いた保護膜形成処理と、酸処理とを、この順で行うことにより形成される。
基材11としては、特に限定されないが、鋼、ステンレス鋼、Al、Al合金、Ti、Ti合金、Cu、Cu合金、Ni、Ni合金などを、特に制限なく用いることができる。
本実施形態の基材11は、燃料電池用集電板の用途で用いられる場合、基材11の平板をプレス加工により所定の形状に形成する方法が挙げられる。
金属めっき層12は、基材11の表面に形成される層であり、図4に示すように、その上に金めっき層13を形成する場合には、金めっき層13を良好に形成するための下地層として作用する層である。あるいは、金めっき層13を形成しない場合には、燃料電池用通電部材の最表層を構成する層となる。なお、金属めっき層12は、1層のみでもよいし、2層以上としてもよく、また、2層以上とする場合には、各層を構成する成分は異なるものであってもよいし、あるいは、同じものであってもよい。
金めっき層13は、必要に応じて金属めっき層12上に形成される層であり、金属めっき層12上にめっき処理を施すことにより形成される。なお、めっき処理としては、無電解めっきが好ましく、無電解置換めっき処理、無電解還元めっき処理などが挙げられる。また、金めっき層13を形成する際には、例えば、無電解置換めっき処理を施し、さらに無電解還元めっき処理を施すことにより形成してもよい。本実施形態では、無電解めっきにより金めっき層13を形成することにより、上述したように予めガス流路が形成された基材を用いた場合においても、ガス流路を構成する凹凸部に対しても、金めっき層13を均一な状態で形成することができる。
まず、表面処理基材10を、保護膜形成剤で処理することで、図6に示すように、表面処理基材10における金属めっき層12が露出した部分の少なくとも一部に、保護膜14を形成する。すなわち、図6に示す要部拡大図のように、保護膜形成剤で処理することで、金めっき層13のピンホール等により、金属めっき層12において金属めっき層12が露出した部分に対し、保護膜形成剤が付着し、これにより、保護膜14が形成される。この際には、金属めっき層12の露出部分は、実質的に全体に保護膜14が形成されていることが好ましいが、保護膜14が形成されていない部分があってもよい。あるいは、本実施形態の表面処理基材10において、上述したように金めっき層13を形成しなかった場合には、金属めっき層12の表面に、保護膜14が形成される。この際には、金属めっき層12の表面は、実質的に全体に保護膜14が形成されていることが好ましいが、保護膜14が形成されていない部分があってもよい。
次いで、上述した保護膜14を形成した表面処理基材10に対して、酸処理を行う。本実施形態では、酸処理を行うことにより、図6に示す表面処理基材10における基材11が露出した部分の少なくとも一部に、図7に示すように、不動態皮膜111を形成する。すなわち、図7に示す要部拡大図のように、金属めっき層12のピンホール等により、基材11上に基材11が露出した部分がある場合には、その露出した部分が、酸処理により不動態化され、不動態皮膜111が形成される。この際には、基材11の露出部分は、実質的に全体に不動態皮膜111が形成されていることが好ましいが、不動態皮膜111が形成されていない部分があってもよい。
まず、基材11としてステンレス鋼材(SUS316L)を準備した。次いで、準備した基材11に対し、下記に示すパラジウムめっき浴と、ニッケルめっき浴とを、パラジウムめっき浴:ニッケルめっき浴=5.7:1(体積比)の割合で混合しためっき浴を用いて、38℃、4分間の条件で、無電解めっき処理を施すことにより、基材11上に、金属めっき層12として厚さ40nmのNi-Pd-P合金層を形成した。なお、めっき浴中におけるパラジウム塩、還元剤、および錯化剤については、従来公知の化合物を用いた。また、パラジウムめっき浴と、ニッケルめっき浴とを混合しためっき浴中におけるNi:Pd(モル比)は、1.14:1.0であった。
<パラジウムめっき浴>
パラジウム塩:パラジウムめっき浴中におけるPd量が0.15重量%となる量
還元剤:1.8重量%
錯化剤:0.63重量%
水:87.2重量%
pH:1.8
<ニッケルめっき浴>
ニッケル塩(硫酸ニッケル):1.8重量%
還元剤(次亜燐酸ソーダ):2.4重量%
錯化剤:2.4重量%
水:93.2重量%
pH:5.2
次いで、表面処理基材10に対し、耐食性の評価を行った。耐食性の評価は、具体的には、表面処理基材10を縦35mm、横30mmの面積が表裏に露出するように基材の端面をポリイミドテープでマスキングし、90℃の硫酸水溶液(体積80ml、pH:2)に100時間浸漬した後、表面処理基材10を取り出し、表面処理基材10から硫酸水溶液中に溶出したイオン(Ni、Pd、P)の濃度をICP(島津製作所社製、ICPE-9000)により測定することにより行った。結果を図10及び表1に示す。
次いで、実施例1において得られた表面処理基材10を用いて、図11に示すような測定系を形成し、次の条件にて、表面処理基材10の電気抵抗を測定した。なお、図11に示す測定系は、表面処理基材10の試験片、金めっき被覆された銅電極20、抵抗計30によって構成される。電気抵抗の測定は、具体的には、まず、表面処理基材10を幅20mm、長さ20mm、厚さ0.1mmの大きさに加工して得た試験片を、図11に示すように、金めっき被覆された銅電極20によって両側から挟んで固定することで、図11に示す測定系とした。次いで、銅電極20に1MPa荷重を加えながら、抵抗計(日置電機社製、ミリオームハイテスタ3540)を用いて、試験片を挟んだ金めっき被覆された銅電極20間の電気抵抗値を測定した。電気抵抗値は、試験片自体の導電性を示すものである。得られた測定結果を表2に示す。
上述した実施例1で用いたステンレス鋼材(SUS316L)を準備し、このステンレス鋼材について、金属めっき層12及び金めっき層13のいずれも形成することなく、そのまま、上述した耐食性の評価、及び電気抵抗の測定を行った。なお、耐食性の評価は、SUS316Lを縦50mm、横60mmの面積が露出するようにポリイミドテープでマスキングして評価を行った。また、電気抵抗の測定は、SUS316Lを、幅20mm、長さ20mm、厚さ0.1mmの大きさに加工して測定を行った。結果を図10及び表1,2に示す。
保護膜形成剤を用いた処理、及び酸処理をいずれも行わなかった以外は、実施例1と同様に表面処理基材10を作製し、同様に耐食性の評価を行った。結果を表1に示す。
酸処理を行わなかった以外は、実施例1と同様に表面処理基材10を作製し、同様に耐食性の評価を行った。結果を表1に示す。
上述した実施例1で用いたステンレス鋼材(SUS316L)を準備し、このステンレス鋼材を、0.049重量%(pH2)の硫酸水溶液に、90℃、24時間の条件で浸漬させて酸処理を行うことにより、ステンレス鋼材の表面に不動態皮膜111を形成し、その後、水洗した。
ステンレス鋼板の表面に形成した不動態皮膜111の表面について、X線光電子分光装置(アルバック・ファイ社製、型番:VersaProbeII)を用いて、Fe2p及びCr2pのピークをそれぞれ測定した。そして、得られたピークの面積から、各ピークの強度を求めた。結果を表3に示す。なお、表3においては、Fe2pのピークの強度と、Cr2pのピークの強度との合計が100となるように、各ピークの強度を求めた。
ステンレス鋼板に形成した不動態皮膜111の表面について、査型オージェ電子分光分析装置(日本電子社製、型番:JAMP-9500F)を用いて、Fe及びCrの原子%を測定し、得られた結果に基づいて、Cr/Fe値(Crの原子%/Feの原子%)を求めた。結果を表4に示す。
上述した参考例2と同じステンレス鋼材(SUS316L)を準備し、このステンレス鋼材について、酸処理を行うことなく、そのまま、上述したXPS測定及びAES測定を行った。結果を表3,4に示す。
酸処理を、濃度1重量%の硫酸水溶液を用いて、pH1以下、70℃、2分間の条件で浸漬させることで行った以外は、上述した実施例1と同様に表面処理基材10を作製した。そして、作製した表面処理基材10について、金めっき層13の剥離の有無を、目視にて確認した。結果を表5に示す。
酸処理を、濃度1重量%の硝酸水溶液を用いて、pH1、70℃、2分間の条件で浸漬させることで行った以外は、上述した実施例2と同様に表面処理基材10を作製し、同様に評価した。結果を表5に示す。
保護膜形成剤を用いた処理を行わなかった以外は、上述した実施例2と同様に表面処理基材10を作製し、同様に評価した。結果を表5に示す。
保護膜形成剤を用いた処理を行わなかった以外は、上述した実施例3と同様に表面処理基材10を作製し、同様に評価した。結果を表5に示す。
2…燃料電池セル
21…電解質膜
22…アノード
23…カソード
1A…燃料ガス流路
3C…酸化ガス流路
3…燃料電池スタック
31…燃料電池用通電部材(集電板)
10…表面処理基材
11…基材
111…不動態皮膜
12…金属めっき層
13…金めっき層
14…保護膜
Claims (13)
- 基材と、前記基材上に形成された少なくとも一層の金属めっき層と、を備える表面処理基材に対し、
保護膜形成剤を用いて、前記金属めっき層上に保護膜を形成した後、酸処理されてなる燃料電池用通電部材。 - 前記保護膜形成剤は、チオール基を有する化合物と、アゾール系化合物との混合物、及び/又はチオール基を有するアゾール系化合物を含むものである請求項1に記載の燃料電池用通電部材。
- 前記酸処理が、硫酸又は硝酸を用いた処理である請求項1又は2に記載の燃料電池用通電部材。
- 前記金属めっき層がNi-Pd-P合金からなる請求項1~3のいずれか一項に記載の燃料電池用通電部材。
- 前記金属めっき層に含まれるPdとNiとのモル比が、Pdに対するNiのモル比(Ni/Pd)で0.005~0.5である請求項4に記載の燃料電池用通電部材。
- 前記基材と前記金属めっき層との間に形成された改質層を、さらに備える請求項1~5のいずれか一項に記載の燃料電池用通電部材。
- 前記金属めっき層上に、金めっき層を、さらに備える請求項1~6のいずれか一項に記載の燃料電池用通電部材。
- 前記基材が、鋼材又はアルミニウム材からなる請求項1~7のいずれか一項に記載の燃料電池用通電部材。
- 前記燃料電池用通電部材が燃料電池用セパレータまたは燃料電池用集電板である請求項1~8のいずれか一項に記載の燃料電池用通電部材。
- 請求項1~9のいずれか一項に記載の燃料電池用通電部材を用いてなる燃料電池セル。
- 請求項10に記載の燃料電池用セルを複数積層してなる燃料電池スタック。
- 基材上に、少なくとも一層の金属めっき層を形成する工程と、
金属めっき層を形成した基材に対して、保護膜形成剤を用いて保護膜形成処理を行う工程と、
前記保護膜形成処理を行った基材に対して、酸処理を行う工程と、を有する燃料電池用通電部材の製造方法。 - 基材上に、少なくとも一層の金属めっき層を形成する工程と、
前記金属めっき層上に、金めっき層を形成する工程と、
前記金属めっき層及び金めっき層を形成した基材に対して、保護膜形成剤を用いて保護膜形成処理を行う工程と、
前記保護膜形成処理を行った基材に対して、酸処理を行う工程と、を有する燃料電池用通電部材の製造方法。
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US20090297913A1 (en) * | 2008-03-25 | 2009-12-03 | The University Of Georgia Research Foundation, Inc. | Nanostructure-Enhanced stereo-electrodes for fuel cells and biosensors |
JP5666940B2 (ja) * | 2011-02-21 | 2015-02-12 | 株式会社大和化成研究所 | 封孔処理剤溶液及びそれを用いた封孔処理方法 |
JP5590008B2 (ja) | 2011-11-14 | 2014-09-17 | 日本軽金属株式会社 | 燃料電池用集電板及びその製造方法 |
JP6254942B2 (ja) | 2012-07-13 | 2017-12-27 | 東洋鋼鈑株式会社 | 燃料電池用セパレータ、燃料電池セル、燃料電池スタック、および燃料電池用セパレータの製造方法 |
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Also Published As
Publication number | Publication date |
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CN107851811B (zh) | 2021-03-09 |
CA2991692A1 (en) | 2017-01-12 |
KR20180027437A (ko) | 2018-03-14 |
EP3322013A1 (en) | 2018-05-16 |
JP2017021956A (ja) | 2017-01-26 |
CN107851811A (zh) | 2018-03-27 |
EP3322013B1 (en) | 2020-03-04 |
US10847830B2 (en) | 2020-11-24 |
EP3322013A4 (en) | 2019-03-13 |
US20180198152A1 (en) | 2018-07-12 |
JP6587848B2 (ja) | 2019-10-09 |
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