Patent Abstract:
A method of manufacturing a hydrogen separation membrane with a carrier is characterized by including a first step of providing, between the hydrogen separation membrane and the carrier that supports the hydrogen separation membrane, a low-hardness metal membrane having a hardness that is lower than the hardness of the hydrogen separation membrane, and a second step of joining the hydrogen separation membrane, the low-hardness metal membrane, and the carrier by a cold joining method. In this case, it is possible to suppress the deformation of the hydrogen separation membrane, the low-hardness metal membrane, and the carrier and, as a result, it is possible to prevent damaging of the hydrogen separation membrane. The adhesion of the contact between the hydrogen separation membrane and the carrier is also improved. The result is that it is not necessary to increase the severity of the cold joining conditions.

Full Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a hydrogen separation membrane with a carrier, to a fuel cell and a hydrogen separation apparatus having same, and to a method of manufacturing same. 
     2. Description of Related Art 
     A fuel cell is an apparatus that obtains electrical energy, generally using hydrogen and oxygen as fuel. Because the fuel cell is superior with regard to the environment and also achieves a high energy efficiency, fuel cell development is being widely pursued as a future energy supply system. 
     Of fuel cells, those that use a solid electrolyte include a solid polymer fuel cell, a solid oxide fuel cell, and a hydrogen separation membrane cell and the like. The term hydrogen separation membrane fuel cell is used herein to mean a fuel cell having a densified hydrogen separation membrane. A densified hydrogen separation membrane is a layer that is formed by a hydrogen-permeable metal, and that functions also as an anode. A hydrogen separation membrane cell has a structure in which a proton-conductive electrolyte is laminated onto a hydrogen separation membrane. Hydrogen that is supplied to the hydrogen separation membrane is converted to protons, which migrate within the proton-conductive electrolyte and bond with oxygen at the cathode, so as to generate electricity in the hydrogen separation membrane cell. 
     The hydrogen separation membrane used in the hydrogen separation membrane cell uses a precious metal such as palladium. For this reason, in order to reduce cost, it is necessary to make the hydrogen separation membrane as thin as possible. In this case, it is necessary to strengthen the hydrogen separation membrane by providing a carrier sheet of stainless steel or the like, and also to make the hardness of the hydrogen separation membrane high. There was a disclosure of art, in Japanese Patent Application Publication No. JP-A-2003-95617, for making a diffusion joining between a hydrogen separation membrane and a carrier sheet. According to this art, the hydrogen separation membrane and the carrier sheet are fixed together by joining. Because there is no melting of the base material, it is possible to make the overall apparatus thin. 
     When using the above-noted art, however, it is necessary to heat the hydrogen separation membrane and the carrier sheet when performing diffusion joining. In this case, because of the difference in the thermal coefficients of expansion between the hydrogen separation membrane and the carrier sheet, there may be occurred damage to the hydrogen separation membrane. It is possible to envision joining the hydrogen separation membrane and the carrier sheet by the cold joining method, such as the cladding method or the like. However, it is difficult for a hydrogen separation membrane with a high hardness to be deformed. As a result, there is a loss in the adhesion of contact between the hydrogen separation membrane and the carrier sheet. 
     SUMMARY OF THE INVENTION 
     The invention has an object to provide a hydrogen separation membrane with a carrier, in which there is a highly adhesion between the hydrogen separation membrane and the carrier sheet, so as to prevent damage to the hydrogen separation membrane. The invention also has an object to provide a fuel cell using same, and a method of manufacturing the hydrogen separation membrane with a carrier and the fuel cell. 
     A method of manufacturing a hydrogen separation membrane with a carrier according to an embodiment of the present invention is characterized by providing, between the hydrogen separation membrane and a carrier that supports the hydrogen separation membrane, a low-hardness metal membrane having a hardness that is lower than the hardness of the hydrogen separation membrane, and joining the hydrogen separation membrane, the low-hardness metal membrane, and the carrier by the cold joining method. 
     In this method of manufacturing, a low-hardness metal membrane having a hardness that is lower than the hardness of the hydrogen separation membrane is provided between the hydrogen separation membrane and the carrier, and the hydrogen separation membrane, the low-hardness metal membrane, and the carrier are joined by the cold joining method. In this case, the temperature of the hydrogen separation membrane, the low-hardness metal membrane, and the carrier is lower than the temperature of the case of using a hot joining method. For this reason, the thermal load applied to the hydrogen separation membrane, the low-hardness metal membrane, and the carrier is made small. That is, there is almost no influence from differences in the thermal coefficients of expansion between the membranes. It is therefore possible to suppress deformation of the hydrogen separation membrane, the low-hardness metal membrane, and the carrier, and further possible to suppress metal diffusion at the joining boundary. As a result, it is possible to prevent damage to the hydrogen separation membrane. 
     Because the low-hardness metal membrane having a hardness that is lower than that of the hydrogen separation membrane and that also is easily deformed is sandwiched between the hydrogen separation membrane and the carrier, there is an improvement in the adhesion between the hydrogen separation membrane and the carrier. The result of this is that it is not necessary to increase the severity of the cold joining conditions. That is, in addition to being able to set the joining temperature to a low temperature, it is possible to set a low joining load. 
     In the above-noted constitution, a low-hardness metal membrane may be formed on at least one of the joining surfaces of the hydrogen separation membrane and the carrier. Before joining the hydrogen separation membrane, the low-hardness metal membrane, and the carrier by a cold joining method, the joining surfaces of the hydrogen separation membrane, the low-hardness metal membrane, and the carrier may be subjected to activation processing. In this case, there is an improvement in the adhesion between the hydrogen separation membrane and the carrier. 
     The low-hardness metal membrane may have hydrogen permeability. Also, the hydrogen separation membrane can include palladium or a palladium alloy, and the low-hardness metal membrane may include a palladium alloy or a metal having a hardness that is lower than the hardness of the hydrogen separation membrane. Additionally, the hydrogen separation membrane may include a palladium alloy having a hardness that is higher than that of substantially pure palladium, and the low-hardness metal membrane may be made of substantially pure palladium. In this case, it is possible to suppress a reduction in the hydrogen permeability of the hydrogen separation membrane. 
     In the above-noted method of manufacturing, the carrier may further have a through hole in the membrane thickness direction. 
     A method of manufacturing a fuel cell according to an embodiment of the invention is characterized in that a proton-conductive electrolyte membrane and cathode are formed on the hydrogen separation membrane of the hydrogen separation membrane with a carrier manufactured by the above-described manufacturing method. In this manufacturing method, a low-hardness metal membrane having a hardness that is lower than the hardness of the hydrogen separation membrane is provided between the hydrogen separation membrane and the carrier, the hydrogen separation membrane, the low-hardness metal membrane, and the carrier are joined by the cold joining method, and a proton-conductive electrolyte membrane and cathode are formed on the hydrogen separation membrane. 
     In this case, the temperature of the hydrogen separation membrane, the low-hardness metal membrane, and the carrier is lower than the temperature of the case of using a hot joining method. Accordingly, the thermal load applied to the hydrogen separation membrane, the low-hardness metal membrane, and the carrier is made small. That is, there is almost no influence from differences between the thermal coefficients of expansion of the various membranes. It is therefore possible to suppress the deformation of the hydrogen separation membrane, the low-hardness metal membrane, and the carrier. As a result, it is possible to prevent damage to the hydrogen separation membrane. Also, because the low-hardness metal membrane having a hardness that is lower than that of the hydrogen separation membrane and that is also easily deformed is sandwiched between the hydrogen separation membrane and the carrier, there is an improvement in the adhesion between the hydrogen separation membrane and the carrier. The result of this is that it is not necessary to increase severity of the cold joining condition. That is, in addition to being able to set the joining temperature to a low temperature, it is possible to set a low joining load. 
     A method of manufacturing a hydrogen separation apparatus according to an embodiment of the invention is characterized in that a gas flow passage is provided above the hydrogen separation membrane of the hydrogen separation membrane with a carrier and below the carrier of the hydrogen separation membrane with a carrier manufactured by the above-described manufacturing method. In this manufacturing method, a low-hardness metal membrane having a hardness that is lower than the hardness of the hydrogen separation membrane is provided between the hydrogen separation membrane and the carrier, the hydrogen separation membrane, the low-hardness metal membrane, and the carrier are joined by the cold joining method, and a gas flow passage is provided above the hydrogen separation membrane and below the carrier. 
     In this case, the temperature of the hydrogen separation membrane, the low-hardness metal membrane, and the carrier is lower than the case of using a hot joining method. Accordingly, the thermal load applied to the hydrogen separation membrane, the low-hardness metal membrane, and the carrier is made small. That is, there is almost no influence from differences in the thermal coefficients of expansion between the membranes. It is therefore possible to suppress deformation of the hydrogen separation membrane, the low-hardness metal membrane, and the carrier. As a result, it is possible to prevent damage to the hydrogen separation membrane. Also, because a low-hardness metal membrane having a hardness that is lower than that of the hydrogen separation membrane and that is also easily deformed is sandwiched between the hydrogen separation membrane and the carrier, there is an improvement in the adhesion between the hydrogen separation membrane and the carrier. The result of this is that it is not necessary to increase the severity of the cold joining condition. That is, in addition to being able to set the joining temperature to a low temperature, it is possible to set a low joining load. 
     A hydrogen separation membrane with a carrier according to an embodiment of the invention is characterized by having a hydrogen separation membrane, a carrier that supports the hydrogen separation membrane, and a low-hardness metal membrane that is laminated onto the carrier and that has a hardness that is lower than the hardness of the hydrogen separation membrane, wherein the carrier, the low-hardness metal membrane, and the hydrogen separation membrane are joined by the cold joining method. In this constitution, a low-hardness metal membrane having a hardness that is lower than the hydrogen separation membrane and that is also easily deformed is sandwiched between the hydrogen separation membrane and the carrier. Accordingly, there is an improvement in the intimacy of contact between the hydrogen separation membrane and the carrier. 
     The low-hardness metal membrane may have hydrogen permeability. The hydrogen separation membrane may include palladium or a palladium alloy, and the low-hardness metal membrane may include a metal or a palladium alloy having a hardness that is lower than the hardness of the hydrogen separation membrane. Additionally, the hydrogen separation membrane may include a palladium alloy having a hardness that is higher than substantially pure palladium, and the low-hardness metal membrane may be made of substantially pure palladium. In this case, it is possible to suppress a loss in the hydrogen permeability of the hydrogen separation membrane. 
     In the hydrogen separation membrane with a carrier described above, the carrier may have a through hole in the membrane thickness direction. 
     A fuel cell according to an embodiment of the invention is characterized by having the above-noted hydrogen separation membrane with a carrier, a proton-conductive electrolyte membrane formed on the hydrogen separation membrane of the hydrogen separation membrane with a carrier, and a cathode formed on the proton-conductive electrolyte membrane. In the fuel cell according to the present invention, a low-hardness metal membrane having a hardness that is lower than the hydrogen separation membrane and that is also easily deformed is sandwiched between the hydrogen separation membrane and the carrier. Accordingly, there is an improvement in the intimacy of contact between the hydrogen separation membrane and the carrier. 
     A hydrogen separation apparatus according to an embodiment of the invention is characterized by having the above-noted hydrogen separation membrane with a carrier, and a gas flow passage formed above the hydrogen separation membrane of the hydrogen separation membrane with a carrier and below the carrier of the hydrogen separation membrane with a carrier. In this constitution, a low-hardness metal membrane having a hardness that is lower than the hydrogen separation membrane and that is also easily deformed is sandwiched between the hydrogen separation membrane and the carrier. Accordingly, there is an improvement in the adhesion between the hydrogen separation membrane and the carrier. 
     According to the invention it is possible to prevent damage to the hydrogen separation membrane, and there is an improvement in the adhesion between the hydrogen separation membrane and the carrier. As a result, it is possible to fabricate a hydrogen separation membrane with a carrier having superior durability. 
    
    
     
       BRIEF DESCRIPTIONS OF THE DRAWINGS 
       The foregoing and/or further objects, features, and advantages of the present invention will become more apparent from the following description of preferred embodiments, with reference to the accompanying drawings, in which like numerals are used to represent like elements, and wherein: 
         FIG. 1  to  FIG. 1F  are manufacturing flow diagrams for describing a method of manufacturing a hydrogen separation membrane with a carrier in accordance with a first embodiment of the invention; 
         FIG. 2A  to  FIG. 2G  are manufacturing flow diagrams for describing a method of manufacturing a hydrogen separation membrane with a carrier in accordance with a second embodiment of the invention; 
         FIG. 3A  and  FIG. 3B  are drawings for describing a fuel cell according to a third embodiment of the invention; and 
         FIG. 4A  and  FIG. 4B  are drawings for describing a hydrogen separation apparatus according to a fourth embodiment of the invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In the following description, the present invention will be described in more detail in terms of exemplary embodiments. 
       FIG. 1A  to  FIG. 1F  are manufacturing flow diagrams for describing the method of manufacturing a hydrogen separation membrane with carrier  40  according to the first embodiment. As shown in  FIG. 1A , a hydrogen separation membrane  10  is first prepared. The hydrogen separation membrane  10  is made from a hydrogen-permeable metal. It is possible to use, for example, a palladium alloy or the like as the hydrogen-permeable metal. The membrane thickness of the hydrogen separation membrane  10  is, for example, 10 μm to 200 μm, and more desirably is 50 μm to 100 μm. 
     Next, as shown in  FIG. 1B , a low-hardness metal membrane  20  having hydrogen permeability is formed on one surface of the hydrogen separation membrane  10 , by a method of plating, vapor deposition, or the like. The hydrogen-permeable low-hardness metal membrane  20  may be laminated on one surface of the hydrogen separation membrane  10  by the cold joining method. The thickness of the low-hardness metal membrane  20  is, for example, 5 μm to 30 μm, and more desirably is 10 μm to 20 μm. The low-hardness metal membrane  20  has a hardness (Vickers hardness, same used hereinafter) that is lower than that of the hydrogen separation membrane  10 . In this embodiment, the low-hardness metal membrane  20  is made of substantially pure palladium. In this case, the term substantially pure palladium is used to mean palladium having a purity of approximately 99.9%. Examples of the hardnesses of substantially pure palladium and palladium alloys that can be used as the hydrogen separation membrane  10  are shown in Table 1. 
     
       
         
               
               
               
             
               
               
               
             
           
               
                   
                 TABLE 1 
               
               
                   
                   
               
               
                   
                 Composition (% by weight) 
                 Vickers Hardness 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 Pd 
                 45 
               
               
                   
                 Pd77% Ag23% 
                 90 
               
               
                   
                 Pd76% Pt24% 
                 55 
               
               
                   
                 Pd60% Cu40% 
                 170 
               
               
                   
                 Pd86% Ni14% 
                 160 
               
               
                   
                 Pd89% Gd11% 
                 250 
               
               
                   
                 Pd70% Au30% 
                 85 
               
               
                   
                 Pd45% Au55% 
                 90 
               
               
                   
                 Pd65% Au30% Rh5% 
                 100 
               
               
                   
                 Pd70% Ag25% Rh5% 
                 130 
               
               
                   
                   
               
             
          
         
       
     
     Next, the carrier  30  is prepared, as shown in  FIG. 1C . The carrier  30  is made, for example, of a metal such as stainless steel or the like. The thickness of the carrier  30  is, for example, 50 μm to 300 μm. In this embodiment, a plurality of through holes  31  are formed in the carrier  30  for the purpose of supplying hydrogen to the hydrogen separation membrane  10 . 
     Next, as shown in  FIG. 1D , activation processing is performed of the joining surface  32  of the carrier  30  (one surface of the carrier  30 ) and the joining surface  21  of the low-hardness metal membrane  20  (the surface of the low-hardness metal membrane  20  that is opposite the hydrogen separation membrane  10 ). The activation processing is done by ion irradiation processing with an inert gas in an atmosphere of an inert gas such as argon or the like. In this case, the surface parts of the joining surface  32  and the joining surface  21  are removed so that the oxides that exist mainly in the surface parts are eliminated. It is possible to use helium, neon, or argon or the like as the inert gas, and it is particularly desirable to use argon gas, from the standpoint of economy. As a result, activated surfaces of the carrier  30  and the low-hardness metal membrane  20  with almost no oxides are exposed. The temperature of the hydrogen separation membrane  10 , the low-hardness metal membrane  20 , and the carrier  30  is approximately 200° C., caused by collision by argon ions when performing activation processing using argon ion irradiation. 
     Next, as shown in  FIG. 1E , the hydrogen separation membrane  10  and the low-hardness metal membrane  20  are placed on the carrier  30  so that the joining surface  21  and the joining surface  32  oppose one another, and the cold joining method is used to join the hydrogen separation membrane  10 , the low-hardness metal membrane  20 , and the carrier  30 . By this process, as shown in  FIG. 1F , the hydrogen separation membrane with a carrier  40  is completed. 
     In this embodiment, the temperature of the hydrogen separation membrane  10 , the low-hardness metal membrane  20 , and the carrier  30  is lower than the case of using a hot joining method. In this case, the thermal load applied to the hydrogen separation membrane  10 , the low-hardness metal membrane  20 , and the carrier  30  is made smaller. That is, there is almost no influence from differences in the thermal coefficients of expansion between the various membranes. Because of this, it is possible to suppress deformation of the hydrogen separation membrane  10 , the low-hardness metal membrane  20 , and the carrier  30 , thereby making it possible to prevent damage to the hydrogen separation membrane  10 . 
     The low-hardness metal membrane  20 , which has a hardness that is lower than the hydrogen separation membrane  10  and that is also easily deformed, is sandwiched between the hydrogen separation membrane  10  and the carrier  30 . For this reason, there is an improvement in the adhesion between the hydrogen separation membrane  10  and the carrier  30 , and there is no need to increase the severity of the cold joining condition. That is, in addition to being able to set the joining temperature to a low temperature, it is possible to set a low joining load. 
     In this embodiment, the low-hardness metal membrane  20  has hydrogen permeability. As a result, it is possible to suppress a loss of hydrogen permeability of the hydrogen separation membrane  10 . The low-hardness metal membrane  20  may also be formed within the through holes  31  of the carrier  30 , in which case there is an improvement in the strength of the low-hardness metal membrane  20 . Accordingly, it is possible to further reduce the thickness of the hydrogen separation membrane  10 . 
     Although in this embodiment pure palladium is used as the low-hardness metal membrane  20  and a palladium alloy is used as the hydrogen separation membrane  10 , there is no particular restriction in this regard. As long as the metal has hydrogen permeability and has a hardness that is lower than the hardness of the hydrogen separation membrane  10 , it may be used as low-hardness metal membrane  20 . For example, it is possible to apply a palladium alloy having a hardness that is lower than the palladium alloy used in the hydrogen separation membrane  10 . Also, as long as the metal has hydrogen permeability it can be used as the hydrogen separation membrane  10 . 
     The method of manufacturing a hydrogen separation membrane with a carrier  40   a  according to the second embodiment of the present invention will now be described.  FIG. 2A  to  FIG. 2F  are manufacturing flow diagrams for describing the method of manufacturing a hydrogen separation membrane with carrier  40   a . Constituent elements having the same numerals as shown for the first embodiment are made from similar materials as the first embodiment. 
     First, as shown in  FIG. 2A , the hydrogen separation membrane  10  is prepared. Next, as shown in  FIG. 2B , a low-hardness metal membrane  20   a  having hydrogen permeability is formed on one surface of the hydrogen separation membrane  10 , by a method of plating, vapor deposition, or the like. The low-hardness metal membrane  20   a  has a hardness that is lower than that of the hydrogen separation membrane  10 . It is possible to use, for example, copper, nickel, tin, zinc or aluminum as the low-hardness metal membrane  20   a  In this embodiment, the low-hardness metal membrane  20   a  is made of copper. The thickness of the low-hardness metal membrane  20   a  is, for example, approximately 10 μm. 
     Next, as shown in  FIG. 2C , the carrier  30  is prepared. Next, as shown in  FIG. 2D , the activation processing is performed of the joining surface  32  of the carrier  30  and the joining surface  21   a  of the low-hardness metal membrane  20   a  (the surface of the low-hardness metal membrane  20   a  that is opposite from the hydrogen separation membrane  10 ). The activation processing is done by ion irradiation processing with an inert gas in an atmosphere of an inert gas such as argon or the like. In this case, the surface parts of the joining surface  32  and the joining surface  21   a  are removed so that the oxides that exist mainly in the surface parts are eliminated. It is possible to use helium, neon, or argon or the like as the inert gas, and it is particularly desirable to use argon, from the standpoint of economy. Next, as shown in  FIG. 2E , the hydrogen separation membrane  10  and the low-hardness metal membrane  20   a  are placed on the carrier  30  so that the joining surface  32  and the joining surface  21   a , which are activated, oppose one another. Then, the cold joining method is used to join the hydrogen separation membrane  10 , the low-hardness metal membrane  20   a , and the carrier  30 . 
     Next, as shown in  FIG. 2F , etching processing is performed of the exposed part of the low-hardness metal membrane  20   a  exposed via the through holes  31 . By this processing, a plurality of through holes  22  for the purpose of supplying hydrogen to the hydrogen separation membrane  10  are formed in the low-hardness metal membrane  20   a  By the above process steps, as shown in  FIG. 2G , the hydrogen separation membrane with a carrier  40   a  is completed. In this embodiment there is no need to use a high-cost hydrogen-permeable metal as the low-hardness metal membrane  20   a . Therefore, it is possible to reduce the cost of the hydrogen separation membrane with a carrier  40   a . Also, any metal having a hardness that is lower than the hardness of the hydrogen separation membrane  10  can be used as the low-hardness metal membrane  20   a.    
     Although the low-hardness metal membrane  20  and  20   a , respectively, of the first embodiment and second embodiment were joined to the carrier  30  after being formed on the hydrogen separation membrane  10 , they may alternatively be joined to the hydrogen separation membrane  10  after being formed on the carrier  30 . Additionally, the low-hardness metal membrane  20  and  20   a  may be formed on both the hydrogen separation membrane  10  and the carrier  30 . In this case as well, there is an improvement in the adhesion between the hydrogen separation membrane  10  and the carrier  30 . 
     Next, a fuel cell  100  according to the third embodiment of the present invention will be described.  FIG. 3A  and  FIG. 3B  are drawings for describing the fuel cell  100 .  FIG. 3A  is a schematic cross-sectional view of the fuel cell  100 , and  FIG. 3B  is a drawing for describing the method of manufacturing the fuel cell  100 . Constituent elements having the same numerals as shown for the first and second embodiments are made from similar materials as the first and second embodiments. 
     As shown in  FIG. 3A , a proton-conductive electrolyte membrane  50  and a cathode  60  are formed in sequence on hydrogen separation membrane  10  of the hydrogen separation membrane with a carrier  40  manufactured by the method of manufacturing of the first embodiment. As shown in  FIG. 3B , a proton-conductive electrolyte membrane  50  and a cathode  60  are formed in sequence onto the hydrogen separation membrane  10  by sputtering or the like, so as to enable manufacturing the fuel cell  100 . 
     The operation of the fuel cell  100  will now be described. First, a fuel gas containing hydrogen is supplied to the low-hardness metal membrane  20  via a plurality of through holes  31  in the carrier  30 . The hydrogen within the fuel gas passes through the low-hardness metal membrane  20  and the hydrogen separation membrane  10  and reaches the proton-conductive electrolyte membrane  50 . Hydrogen that reaches the proton-conductive electrolyte membrane  50  is separated into protons and electrons. The protons are conducted through the proton-conductive electrolyte membrane  50  and reach the cathode  60 . 
     Oxidizing gas that contains oxygen is supplied to the cathode  60 . At the cathode  60 , water is synthesized and electricity is generated from the oxygen in the oxidizing gas and protons that have reached the cathode  60 . The generated electrical power is recovered via a separator, which is not illustrated. By the above-noted operation, the fuel cell  100  generates electrical power. A hydrogen separation membrane with a carrier  40   a  manufactured by method of manufacturing according to the second embodiment can be used in place of the hydrogen separation membrane with a carrier  40 . In this case, the fuel gas is supplied to the hydrogen separation membrane  10  via the plurality of through holes  31  and via the plurality of through holes  22   a  of the low-hardness metal membrane  20   a.    
     A hydrogen separation apparatus  200  according to the fourth embodiment of the invention will now be described.  FIG. 4A  and  FIG. 4B  are drawings for describing the hydrogen separation apparatus  200 .  FIG. 4A  is a schematic cross-sectional view of the hydrogen separation apparatus  200 , and  FIG. 4B  is a drawing for describing the method of manufacturing the hydrogen separation apparatus  200 . Constituent elements having the same numerals as shown for the first and second embodiments are made from similar materials as the first and second embodiments. 
     As shown in  FIG. 4A , a flow passage plate  80  is formed on the hydrogen separation membrane  10  side of the hydrogen separation membrane with a carrier  40  manufactured by the method of manufacturing according to the first embodiment, and a flow passage plate  70  is formed on the carrier  30  side of the hydrogen separation membrane with a carrier  40  manufactured by the method of manufacturing according to the first embodiment. The flow passage plate  70  is a plate in which is formed a flow passage for the purpose of supplying gas containing hydrogen to the hydrogen separation membrane with a carrier  40 , and the flow passage plate  80  is a plate in which is formed a flow passage for the purpose of recovering hydrogen that is separated at the hydrogen separation membrane with a carrier  40 . 
     As shown in  FIG. 4B , the flow passage plate  70  is joined to the surface of the carrier  30  on the side opposite from the low-hardness metal membrane  20  and the flow passage plate  80  is joined to the surface of the hydrogen separation membrane  10  on the side opposite from the low-hardness metal membrane  20 , thereby enabling manufacture of the hydrogen separation apparatus  200 . 
     The operation of the fuel cell  200  will now be described. First, a fuel gas containing hydrogen is supplied from the flow passage within the flow passage plate  70  to the low-hardness metal membrane  20  via a plurality of through holes  31  in the carrier  30 . The hydrogen in the fuel gas passes through the low-hardness metal membrane  20  and the hydrogen separation membrane  10  and reaches the flow passage plate  80 . Hydrogen that has reached the flow passage plate  80  is recovered via the flow passage of the flow passage plate  80 . By this operation, it is possible to separate hydrogen that is contained in the fuel gas. A hydrogen separation membrane with a carrier  40   a  manufactured by method of manufacturing according to the second embodiment can be used in place of the hydrogen separation membrane with a carrier  40 . In this case, the fuel gas is supplied to the hydrogen separation membrane  10  via the plurality of through holes  31  and via the plurality of through holes  22  of the low-hardness metal membrane  20   a.    
     While the invention has been described with reference to exemplary embodiments thereof, it should be understood that the invention is not limited to the exemplary embodiments or constructions. To the contrary, the invention is intended to cover various modifications and equivalent arrangements. In addition, while the various elements of the exemplary embodiments are shown in various combinations and configurations, which are exemplary, other combinations and configurations, including more, fewer, or only a single element, are also within the spirit and scope of the invention.

Technology Classification (CPC): 8