EP3260579B1 - Method for producing nickel alloy porous body - Google Patents

Method for producing nickel alloy porous body Download PDF

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Publication number
EP3260579B1
EP3260579B1 EP16752200.2A EP16752200A EP3260579B1 EP 3260579 B1 EP3260579 B1 EP 3260579B1 EP 16752200 A EP16752200 A EP 16752200A EP 3260579 B1 EP3260579 B1 EP 3260579B1
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EP
European Patent Office
Prior art keywords
nickel
nickel alloy
metal
powder
resin formed
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EP16752200.2A
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German (de)
English (en)
French (fr)
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EP3260579A4 (en
EP3260579A1 (en
Inventor
Kazuki Okuno
Takahiro HIGASHINO
Tomoyuki Awazu
Masatoshi Majima
Junichi Nishimura
Kengo Tsukamoto
Hitoshi Tsuchida
Hidetoshi Saito
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Sumitomo Electric Industries Ltd
Sumitomo Electric Toyama Co Ltd
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Sumitomo Electric Industries Ltd
Sumitomo Electric Toyama Co Ltd
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Publication of EP3260579A1 publication Critical patent/EP3260579A1/en
Publication of EP3260579A4 publication Critical patent/EP3260579A4/en
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D1/00—Electroforming
    • C25D1/08—Perforated or foraminous objects, e.g. sieves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/12—Metallic powder containing non-metallic particles
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/08—Alloys with open or closed pores
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/48—After-treatment of electroplated surfaces
    • C25D5/50—After-treatment of electroplated surfaces by heat-treatment
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/54—Electroplating of non-metallic surfaces
    • C25D5/56—Electroplating of non-metallic surfaces of plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2301/00—Metallic composition of the powder or its coating
    • B22F2301/15—Nickel or cobalt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2304/00—Physical aspects of the powder
    • B22F2304/10—Micron size particles, i.e. above 1 micrometer up to 500 micrometer

Definitions

  • the present invention relates to a method for producing a nickel alloy porous body that is usable, for example, as a current collector for a battery, filter, or catalyst carrier, that is excellent in terms of strength and toughness, and that is produced at a low cost and from a wide range of materials.
  • Porous metal bodies have been used in various applications, such as current collectors for batteries, filters, and catalyst carriers. Accordingly, there are many known documents regarding production techniques for porous metal bodies, as described below.
  • Japanese Unexamined Patent Application Publication No. 7-150270 proposes a porous metal body having high strength, which is obtained by applying a coating material containing reinforcing fine particles of an oxide, carbide, or nitride of an element selected from Groups II to VI of the periodic table onto a surface of a skeleton of a three-dimensional mesh-like resin having interconnected pores; forming a metal plating layer of a Ni alloy or Cu alloy on the coating film of the coating material; and dispersing the fine particles in the metal plating layer by performing a heat treatment.
  • the reinforcing fine particles are dispersed in the metal plating layer which is a base layer, the porous metal body has low elongation at break although its breaking strength is high.
  • the porous metal body is vulnerable to processing that involves plastic deformation, such as bending or pressing, and breaks when subjected to such processing, which is a problem.
  • Japanese Examined Patent Application Publication No. 38-17554 (PTL 2), Japanese Unexamined Patent Application Publication No. 9-017432 (PTL 3), and Japanese Unexamined Patent Application Publication No. 2001-226723 (PTL 4) each propose a porous metal body which is obtained by applying or spraying a slurry composed of a metal or metal oxide powder and a resin onto a three-dimensional mesh-like resin, followed by drying, and performing a sintering treatment.
  • the porous metal body produced by the sintering process since the skeleton is formed by sintering between metal or metal oxide powder particles, even if the powder particle size is decreased, voids occur in considerable numbers in the skeleton in cross section.
  • Japanese Unexamined Patent Application Publication No. 8-013129 (PTL 5) and Japanese Unexamined Patent Application Publication No. 8-232003 (PTL 6) each propose a porous metal body obtained by a diffusion coating process in which a Ni porous body formed by a plating process, with a three-dimensional mesh-like resin to which conductivity has been imparted being used as a substrate, is buried in powder of Cr or Al and NH 4 Cl, and is subjected to a heat treatment in an Ar or H 2 gas atmosphere.
  • the low productivity of the diffusion coating process results in a high cost, and the element capable of forming an alloy with the Ni porous body is limited to Cr and Al, all of which are problems.
  • Japanese Unexamined Patent Application Publication No. 2013-133504 proposes a method for producing a porous body in which, when an electrical conduction treatment is performed on a surface of a resin formed body having a three-dimensional mesh-like structure, a carbon coating material to which a metal powder has been added is applied to the surface, and then electroplating with a desired metal and a heat treatment are performed, thereby obtaining a homogeneous alloy porous body.
  • porous metal body that is suitable for use, for example, as a current collector for a battery, filter, or catalyst carrier, that is excellent in terms of strength and toughness, and that is produced at a low cost and from a wide range of materials.
  • Figs. 3A to 3C are schematic diagrams, each showing a cross section of a skeleton of a resin formed body during a production step when a porous metal body is produced by the method described in PTL 7.
  • a carbon coating material containing a metal powder 2 is applied onto the surface of the resin formed body 1 (refer to Fig. 3A ). Thereby, the surface of the resin formed body 1 is made conductive. Subsequently, coating with a desired metal is performed by electrolytic plating. Thereby, as shown in Fig. 3B , a metal plating layer 3 is formed on the surface of the resin formed body 1. Subsequently, in order to remove the resin formed body 1, a heat treatment is performed. In this process, a phenomenon is observed in which, as shown in Fig. 3C , the resin formed body 1 contracts, and some of the metal particles 2 which have been adhering to the surface of the resin formed body 1 remain adhering to the resin formed body 1 and are not incorporated in the metal plating layer 3.
  • the invention it is possible to provide a method for producing a nickel alloy porous body, in which, even in the case where the concentration of the metal added to nickel is low, control of the concentration is facilitated, and the added metal can be uniformly diffused into the porous body.
  • a method for producing a nickel alloy porous body according to an embodiment of the present invention will be described in detail with reference to Figs. 1A to 1C .
  • Figures 1A to 1C are schematic diagrams, each showing a cross section of a skeleton of a resin formed body during a production step when a nickel alloy porous body is produced by the method for producing a nickel alloy porous body according to the embodiment of the present invention.
  • a resin formed body 1 serving as a base for a nickel alloy porous body is prepared.
  • a coating material containing a conductive powder is applied onto the surface of the skeleton of the resin formed body 1.
  • an alloy powder 4 including a metal to be added to a nickel porous body and nickel is used (refer to Fig. 1A ).
  • a nickel plating layer 3 is formed on the surface of the skeleton of the resin formed body 1. Since the surface of the skeleton of the resin formed body 1 is conductive, the nickel plating layer 3 can be formed by electrolytic plating. Thereby, as shown in Fig. 1B , a layer composed of the nickel alloy powder 4 and the nickel plating layer 3 are formed.
  • the nickel alloy powder 4 on the surface of the skeleton of the resin formed body rapidly starts to diffuse into the nickel plating layer 3. Therefore, when the resin formed body 1 starts to contract, the nickel alloy powder 4 does not move without adhering to the surface of the resin formed body 1, but remains incorporated in the nickel plating layer 1 (refer to Fig. 1C ).
  • the method for producing a nickel alloy porous body includes a step of applying a coating material that contains a nickel alloy powder onto a surface of a skeleton of a resin formed body, a step of performing nickel plating, a step of removing the resin formed body, and a step of diffusing the nickel alloy powder into nickel.
  • the resin formed body having a three-dimensional mesh-like structure a resin foam, nonwoven fabric, felt, woven fabric, or the like can be used. As necessary, these may be used in combination.
  • the material that constitutes the resin formed body is not particularly limited, but is preferably a material that can be plated with a metal and then can be removed by a burning treatment. Furthermore, from the viewpoint of handling of the resin formed body, in particular, in a sheet-shaped body, a material having high rigidity may break, and therefore, a material having flexibility is preferable.
  • a resin foam as the resin formed body having a three-dimensional mesh-like structure.
  • the resin foam may be a known or commercially available resin foam as long as it is porous. Examples thereof include a urethane foam and a styrene foam. Among these, in particular, a urethane foam is preferable from the viewpoint of a high porosity.
  • the thickness, porosity, and average pore size of the resin foam are not particularly limited and can be appropriately determined depending on the application.
  • a nickel alloy powder having a volume-average particle size of 10 ⁇ m or less is used for performing an electrical conduction treatment on the surface of the skeleton of the resin formed body.
  • the nickel alloy powder preferably has a smaller volume-average particle size, and more preferably has a volume-average particle size of 3 ⁇ m or less.
  • the volume-average particle size may be appropriately selected in accordance with the diameter of the skeleton of a resin formed body to be used.
  • the added metal that forms an alloy with nickel is not particularly limited, and a desired metal may be selected in accordance with the intended use.
  • a desired metal may be selected in accordance with the intended use.
  • the nickel alloy powder may be a powder in which nickel and an added metal form a completely homogeneous alloy, or may be a mixed-type powder, a core-shell type powder, or a composite-type powder. In the present invention, all of these types of powder are referred to as the nickel alloy powder.
  • mixed-type powder refers to a powder in which a plurality of single particles of an added metal are present inside a nickel particle, or a powder in which a layer-shaped added metal is present inside a nickel particle.
  • core-shell type powder refers to a powder in which the surface of a single particle of an added metal is coated with nickel.
  • composite-type powder refers to, for example, a powder which has a core-shell structure composed of an added metal and a nickel alloy, or a powder having a core-shell structure in which a particle-shaped or layer-shaped added metal is partially present.
  • any of the nickel alloy powders a powder in which most of the surfaces of nickel alloy particles are made of nickel or a homogeneous nickel alloy is used so that the nickel alloy particles can be easily diffused into the nickel plating layer.
  • Such a nickel alloy powder can be obtained by a disintegration process for disintegrating a nickel alloy, an atomization process, or the like.
  • At least a surface of the nickel alloy powder is oxidized.
  • a nickel alloy powder is produced by disintegrating an alloy of nickel and an added metal
  • a nickel alloy i.e., a starting material
  • the added metal can be easily diffused into nickel.
  • the nickel alloy powder obtained by disintegrating the nickel alloy in an oxidized state at least a surface of the nickel alloy powder is in an oxidized state, and the oxidized metal can be reduced in a heat treatment step in which the added metal is diffused into nickel.
  • a carbon powder is further added to the coating material.
  • the volume-average particle size of the carbon powder is preferably 10 ⁇ m or less, and more preferably 3 ⁇ m or less, as in the nickel alloy powder. Furthermore, the volume-average particle size may be appropriately selected in accordance with the diameter of the skeleton of a resin formed body.
  • Examples of the material of the carbon powder include crystalline graphite and amorphous carbon black.
  • graphite is particularly preferable from the viewpoint that, in general, graphite tends to have a small particle size.
  • a conductive coating material can be produced by adding the nickel alloy powder and, if necessary, a carbon powder to a binder, followed by mixing.
  • the coating material may to be applied onto the surface of the skeleton of the resin formed body.
  • the method of applying the coating material is not particularly limited and, for example, an immersion method or an application method by using a brush or the like may be used. Thereby, a conductive coating layer is formed on the surface of the skeleton of the resin formed body.
  • the conductive coating layer may be continuously formed on the surface of the skeleton of the resin formed body. Furthermore, the coating weight of the conductive coating layer is not particularly limited, and is usually about 0.1 to 300 g/m 2 , and preferably about 1 to 100 g/m 2 .
  • a known plating process can be used, and an electroplating process is preferably used.
  • an electroplating process is preferably used.
  • the electroplating treatment if the thickness of a plating film is increased by an electroless plating treatment and/or a sputtering treatment, it may not be necessary to perform an electroplating treatment. However, this is not desirable from the viewpoint of productivity and cost.
  • a nickel alloy porous body can be produced with high productivity and at a low cost. Furthermore, it is possible to obtain a highly stable nickel alloy porous body in which the skeleton, in cross section, has a void ratio of less than 1%.
  • the plating layer may have a multi-layered structure, and in such a case, a nickel plating layer is formed as a first plating layer. Thereby, the nickel alloy particles can be easily diffused into the nickel plating layer.
  • a metal plating layer may be appropriately formed on the nickel plating layer in accordance with the intended use.
  • the nickel plating layer may be formed on the conductive coating layer to such an extent that the conductive coating layer is not exposed.
  • the coating weight of the nickel plating layer is not particularly limited, and may be appropriately selected in accordance with the thickness of the nickel alloy porous body. In order to achieve both strength and a porosity, the coating weight per 1 mm thickness may be usually about 100 to 600 g/m 2 , and is more preferably about 200 to 500 g/m 2 .
  • the resin formed body By subjecting the composite body of resin and metal obtained through the foregoing steps to a heat treatment in the air, the resin formed body can be removed.
  • the heat treatment temperature is preferably 700°C to 1,200°C.
  • the heat treatment temperature is 700°C or higher, the resin formed body can be removed and the nickel alloy powder can be easily diffused into the nickel plating layer.
  • the heat treatment temperature is 1,200°C or lower, nickel can be suppressed from being excessively oxidized. From these viewpoints, the heat treatment temperature is more preferably 750°C to 1,100°C, and still more preferably 800°C to 1,050°C.
  • the heat treatment time may be appropriately changed depending on the heat treatment temperature.
  • the resin formed body can be satisfactorily removed in about 10 to 30 minutes.
  • This step is carried out to more uniformly diffuse the added metal incorporated in the nickel plating layer.
  • the heat treatment temperature and the heat treatment time may be appropriately selected in accordance with the metal added.
  • the heat treatment may be performed at 1,100°C for 30 minutes or more.
  • the heat treatment may be performed at 1,000°C for 15 minutes or more.
  • the nickel alloy powder or nickel alloy oxide powder and the nickel plating layer can be reduced.
  • the carbon powder contained in the conductive coating layer serves as a strong reducing agent at high temperatures to reduce the nickel alloy powder or nickel alloy oxide powder and the nickel plating layer.
  • the heat treatment at the optimal temperature for the optimum period of time suitable for the added metal species allows reduction of the nickel alloy (decrease in the oxygen concentration in the metal) with the carbon powder when used, alloy formation due to thermal diffusion, and coarsening of crystal grains.
  • the strength and roughness of the nickel alloy porous body are improved, and it is possible to obtain a strong nickel alloy porous body that does not break even when subjected to processing that involves plastic deformation, such as bending or pressing.
  • polyurethane foam sheets (pore size 0.45 mm) with a thickness of 1.5 mm were prepared. Subsequently, 100 g of graphite with a volume-average particle size of 10 ⁇ m, 20 g of carbon black with a volume-average particle size of 0.1 ⁇ m, and 100 g of a nickel alloy oxide powder with a volume-average particle size shown in Table 1 were dispersed in 0.5 L of a 10% aqueous solution of an acrylic ester resin, and a viscous coating material was produced at this composition ratio.
  • nickel alloy oxide powder a nickel-chromium alloy oxide powder, a nickel-cobalt alloy oxide powder, a nickel-tin alloy oxide powder, and a nickel-copper alloy oxide powder was used.
  • the nickel alloy oxide powders were obtained by oxidizing the corresponding nickel alloy powders and used by disintegrating and classifying the oxidized powders so that the volume-average particle size was 0.5 to 1.5 ⁇ m.
  • each of the polyurethane foam sheets was continuously immersed in the coating material and squeezed with rolls, followed by drying.
  • the polyurethane foam sheet was subjected to an electrical conduction treatment.
  • a conductive coating layer was formed on the surface of the resin formed body having a three-dimensional mesh-like structure.
  • the viscosity of the conductive coating material was adjusted with a thickener, and the coating weight of the coating material was set to be 20 g/m 2 in terms of alloy powder.
  • the coating weight is shown in Table 1.
  • a nickel plating layer was formed by electroplating with 300 g/m 2 on the surface of the skeleton of the resin formed body having a three-dimensional mesh-like structure which had been subjected to the electrical conduction treatment.
  • As the plating solution a nickel sulfamate plating solution was used.
  • the resin formed body was removed by burning.
  • the oxidized porous metal body was reduced by performing a heat treatment in a reducing hydrogen atmosphere at 1,000°C for 15 minutes.
  • Figures 2A to 2D show the results of observation, by an electron microscope (SEM), of cross sections of skeletons of the nickel alloy porous bodies 1 to 4 obtained as described above. As shown in Figs. 2A to 2D , in each of the nickel alloy porous bodies 1 to 4, it has been confirmed that the added metal particles do not remain on the inner surface of the skeleton of the nickel alloy porous body and that the added metal is uniformly diffused into nickel.
  • SEM electron microscope
  • Nickel alloy porous bodies 5 to 8 were produced as in Example 1 except that, instead of the nickel-chromium alloy oxide powder, the nickel-cobalt alloy oxide powder, the nickel-tin alloy oxide powder, and the nickel-copper alloy oxide powder, a nickel-chromium alloy powder, a nickel-cobalt alloy powder, a nickel-tin alloy powder, and a nickel-copper alloy powder were used.
  • the volume-average particle size and coating weight of the nickel alloy powders are shown in Table 1.
  • Nickel alloy porous bodies 9 to 12 were produced as in Example 1 except that, instead of the nickel-chromium alloy oxide powder, the nickel-cobalt alloy oxide powder, the nickel-tin alloy oxide powder, and the nickel-copper alloy oxide powder, a chromium oxide powder, a cobalt oxide powder, a tin oxide powder, and a copper oxide powder were used.
  • the metal oxide powders were obtained by oxidizing the corresponding metal powders and used by disintegrating and classifying the oxidized powders. The volume-average particle size and coating weight of the oxidized metal powders are shown in Table 1.
  • Figures 2E to 2H show the results of observation, by an electron microscope, of cross sections of skeletons of the nickel alloy porous bodies 9 to 12, as in Example 1. As shown in Figs. 2E to 2H , in each of the porous metal bodies 9 to 12, it has been confirmed that some of the added metal particles remain on the inner surface of the skeleton of the nickel alloy porous body.
  • Nickel alloy porous bodies 13 to 16 were produced as in Example 1 except that, instead of the nickel-chromium alloy oxide powder, the nickel-cobalt alloy oxide powder, the nickel-tin alloy oxide powder, and the nickel-copper alloy oxide powder, a chromium powder, a cobalt powder, a tin powder, and a copper powder were used.
  • Nickel-chromium alloy oxide 0.5 21 3.4 2 Nickel-cobalt alloy oxide 0.7 19 3.1 3 Nickel-tin alloy oxide 0.6 20 3.2 4 Nickel-copper alloy oxide 1.1 22 3.5 5 Nickel-chromium alloy 1.5 23 3.5 6 Nickel-cobalt alloy 1.8 21 3.4 7 Nickel-tin alloy 1.5 20 3.3 8 Nickel-copper alloy 2.3 24 3.7 9 Chromium oxide 0.5 20 3.2 10 Cobalt oxide 0.5 23 3.7 11 Tin oxide 0.6 19 3.1 12 Copper oxide 1.4 18 2.9 13 Chromium 1.4 21 3.3 14 Cobalt 1.5 23 3.7 15 Tin 1.7 20 3.3 16 Copper 2.2 21 3.4
  • porous metal bodies which are nickel alloy porous bodies according to the present invention can also be suitably used for the production of hydrogen by water electrolysis.
  • FIG 4 is a schematic diagram showing an existing water decomposition device.
  • Current collectors 6 are disposed on both sides of an ion permeable membrane 5.
  • the ion permeable membrane 5 allows mainly hydrogen or oxygen to permeate therethrough.
  • the current collectors 6 each have a gas channel, which is made of a corrugated stainless steel plate, carbon structure having grooves, or the like, on the side thereof in contact with the ion permeable membrane. Steam is introduced into one of the gas channels.
  • hydrogen ions generated from decomposition pass through the ion permeable membrane 5 and are discharged from the gas channel on the opposite side, and oxygen generated from decomposition, together with steam that has not been decomposed, is discharged as is.
  • FIG. 5 is a schematic diagram showing a water decomposition device which uses porous metal bodies according to an embodiment of the present invention.
  • the water decomposition device has the same structure as that of the existing water decomposition device shown in Fig. 4 except that gas channels are made of porous metal bodies 7.
  • gas channels are made of porous metal bodies 7.
  • the porous metal body according to the present invention has a high porosity, good electrical conductivity, high oxidation resistance, and high heat resistance, and therefore, can be suitably used for SOEC water electrolysis as well as suitably used for a solid oxide fuel cell. It is preferable to use a Ni alloy to which a metal having high oxidation resistance, such as Cr, is added for the electrode on the side subjected to an oxidizing atmosphere.
  • the pore size of the porous metal body is preferably 100 to 5,000 ⁇ m. When the pore size is less than 100 ⁇ m, flow of steam or generated hydrogen becomes unsatisfactory, and the area of contact between steam and the solid oxide electrolyte decreases, resulting in a decrease in efficiency.
  • the pore size is more than 5,000 ⁇ m, since the pressure loss excessively decreases, steam passes through the porous metal body before fully reacting, resulting in a decrease in efficiency.
  • the pore size is more preferably 400 to 4,000 ⁇ m.
  • the thickness and metal content of the porous metal body can be appropriately selected in accordance with the scale of equipment.
  • the porosity is excessively small, the pressure loss during feeding of steam increases. Therefore, the thickness and metal content are preferably adjusted so that the porosity is 30% or more.
  • the electrical connection between the solid oxide electrolyte and the electrode is performed by pressure bonding, it is necessary to adjust the metal content such that the increase in electrical resistance due to deformation/creeping during application of pressure is within a range that causes no problem in practical use.
  • the metal content is preferably 400 g/m 2 or more. Additionally, in order to secure the porosity and to achieve electrical connection, a plurality of porous metal bodies having different pore sizes may combined for use.
  • a water decomposition device including:
  • a water decomposition method including:
  • Nickel alloy porous bodies according to the present invention have excellent mechanical properties and high corrosion resistance and can be produced at a reduced cost. Therefore, the nickel alloy porous bodies can be suitably used as current collectors for secondary batteries, such as lithium-ion batteries, capacitors, and fuel cells, and water decomposition devices.
  • secondary batteries such as lithium-ion batteries, capacitors, and fuel cells, and water decomposition devices.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Inert Electrodes (AREA)
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  • Electroplating Methods And Accessories (AREA)
EP16752200.2A 2015-02-18 2016-01-22 Method for producing nickel alloy porous body Not-in-force EP3260579B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015029654 2015-02-18
PCT/JP2016/051784 WO2016132811A1 (ja) 2015-02-18 2016-01-22 ニッケル合金多孔体の製造方法

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EP3260579A1 EP3260579A1 (en) 2017-12-27
EP3260579A4 EP3260579A4 (en) 2018-01-24
EP3260579B1 true EP3260579B1 (en) 2018-10-17

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US (1) US20180030607A1 (zh)
EP (1) EP3260579B1 (zh)
JP (1) JP6653313B2 (zh)
KR (1) KR20170118701A (zh)
CN (1) CN107208294B (zh)
WO (1) WO2016132811A1 (zh)

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US11329295B2 (en) * 2018-06-21 2022-05-10 Sumitomo Electric Industries, Ltd. Porous body, current collector including the same, and fuel cell
US20220081787A1 (en) * 2019-03-01 2022-03-17 Tanaka Kikinzoku Kogyo K.K. Porous body, electrochemical cell, and method for producing porous body
WO2020235266A1 (ja) * 2019-05-22 2020-11-26 住友電気工業株式会社 多孔体、それを含む燃料電池、およびそれを含む水蒸気電解装置
US20220320530A1 (en) * 2019-05-22 2022-10-06 Sumitomo Electric Industries, Ltd. Porous body, fuel cell including the same, and steam electrolysis apparatus including the same
CN113383100B (zh) * 2019-12-24 2022-10-25 住友电气工业株式会社 多孔体以及包括该多孔体的燃料电池
KR20220115573A (ko) * 2019-12-24 2022-08-17 스미토모덴키고교가부시키가이샤 다공체 및, 그것을 포함하는 연료 전지
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KR20170118701A (ko) 2017-10-25
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CN107208294A (zh) 2017-09-26
CN107208294B (zh) 2019-07-30
JPWO2016132811A1 (ja) 2017-11-24
WO2016132811A1 (ja) 2016-08-25
US20180030607A1 (en) 2018-02-01
EP3260579A1 (en) 2017-12-27

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