JP2008140745A - Membrane electrode assembly manufacturing jig and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means for manufacturing a membrane electrode assembly without generating wrinkles on a reinforcement film, in manufacturing a membrane electrode assembly equipped with such a reinforcement film used for increasing mechanical intensity of a solid polymer electrolyte membrane. <P>SOLUTION: With the use of a membrane electrode assembly manufacturing jig equipped with a first pressurizing plate with a first pressurizing convex part formed, a first frame body with a through hole for insertion-coupling the first pressurizing part formed, a second pressurizing plate arranged opposed to the first pressurizing plate, and a means for changing a height of an upper face of the first frame body, by simultaneously contacting and overlapping the reinforcement film mounted on the first frame body to an electrode over a whole surface of a superimposing part with the reinforcement film and the electrode, generation of wrinkles of the reinforcement film is prevented. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a membrane electrode assembly manufacturing jig used for manufacturing a membrane electrode assembly of a solid polymer electrolyte fuel cell and a method of manufacturing a membrane electrode assembly using the membrane electrode assembly manufacturing jig It is.

  A polymer electrolyte fuel cell is a fuel cell that uses a solid polymer electrolyte membrane such as a perfluorosulfonic acid resin membrane as an electrolyte. The solid polymer electrolyte membrane has anode and cathode electrodes formed on both main surfaces thereof. The membrane electrode assembly is incorporated into a fuel cell. Each of the anode and cathode electrodes is obtained by forming a catalyst layer on an electrode base material such as carbon paper that functions as a gas diffusion layer. A membrane electrode assembly is obtained by joining a solid polymer electrolyte membrane between the opposing anode and cathode electrodes and joining the electrode and the solid polymer electrolyte membrane by a hot press method of pressing and heating. Can do.

  Patent Document 1 discloses an example of a method for manufacturing a membrane electrode assembly. Since electrodes and carbon paper are expensive, it is desirable to use as little as possible. Therefore, the membrane electrode assembly is arranged so that both electrodes having a smaller area than the solid polymer electrolyte membrane are arranged at the center of both main surfaces of the solid polymer electrolyte membrane and the peripheral edge of the solid polymer electrolyte membrane is not covered. Has been. This peripheral part is inferior in mechanical strength to the coated part. For this reason, the membrane electrode assembly may be damaged in the operation of incorporating the membrane electrode assembly into the fuel cell, or may be broken if a pressure difference occurs in the gas supplied to the anode and the cathode during the operation of the fuel cell. For this reason, Patent Document 2 discloses a technique for improving the mechanical strength of the solid polymer electrolyte membrane by covering the peripheral edge with a reinforcing membrane.

  FIG. 4 shows a structural cross-sectional view of a membrane electrode assembly using a reinforcing membrane. The solid polymer electrolyte membrane 1 and the reinforcing membrane 2 are sandwiched between the first electrode 3 and the second electrode 4 that face each other. Here, when the first electrode 3 is an anode, the second electrode 4 is a cathode, and when the first electrode 3 is a cathode, the second electrode 4 is an anode. As the reinforcing film 2, a fluororesin film having a thickness of 5 μm to 50 μm can be used. Since the reinforcing membrane 2 has a frame shape having a through hole in the center portion, the solid polymer electrolyte membrane 1 and the first electrode 3 are in direct contact with each other at the through hole portion, and are joined by a hot press method.

Further, since the size of the through hole is smaller than that of the first electrode 3, the overlapping portion 5 of the reinforcing film 2 and the first electrode 3 exists in the peripheral portion of the first electrode 3. Therefore, the reinforcing membrane 2 is held and fixed between the first electrode 3 and the solid polymer electrolyte membrane 1 in the overlapping portion 5.
In FIG. 4, the reinforcing membrane 2 is disposed between the solid polymer electrolyte membrane 1 and the first electrode 3, but may be disposed between the solid polymer electrolyte membrane 1 and the second electrode 4. . In this way, the reinforcing membrane 2 is arranged on one main surface of the solid polymer electrolyte membrane 1 or on both main surfaces thereof, so that the peripheral portion of the solid polymer electrolyte membrane is made of the reinforcing membrane. It can be coated and its mechanical strength can be improved.
JP 2004-303627 A JP-A-5-2442897

As described above, since the mechanical strength of the peripheral portion of the solid polymer electrolyte membrane not covered with the electrode can be increased by using the reinforcing membrane for the membrane electrode assembly, it occurs during the manufacturing process or operation of the fuel cell. The effect of preventing damage to the solid polymer electrolyte membrane is obtained. However, the use of the reinforcing membrane has the following problems.
Since the reinforcing film has a thickness of 5 μm to 50 μm and is thin and soft, alignment is difficult, and the overlapping portion of the electrode and the reinforcing film is likely to be wrinkled during lamination. In particular, wrinkles are likely to occur when the reinforcing films cannot be overlapped at one time, but are overlapped over a portion of the overlapped portion and then overlapped over the remaining portion. When the reinforcing membrane is held and fixed between the electrode and the solid polymer electrolyte membrane while wrinkles are generated in the overlapping portion of the reinforcing membrane, the wrinkles spread to other portions of the reinforcing membrane, and the overlapped reinforcement The adhesion between the membrane and the solid polymer electrolyte membrane is deteriorated, and the mechanical strength of the solid polymer electrolyte membrane cannot be increased.

  Accordingly, the present invention provides a membrane electrode assembly manufacturing jig and a membrane electrode assembly manufacturing method for manufacturing a membrane electrode assembly without producing wrinkles in the reinforcing membrane in the manufacture of a membrane electrode assembly using a reinforcing membrane. The task is to do.

  The wrinkles of the reinforcing film are likely to occur when the reinforcing film is overlapped for a part of the overlapping portion and then overlapped for the remaining portion, but when the entire surface of the overlapping portion is simultaneously brought into contact with the electrode, Can be stacked without wrinkles. For this reason, the present invention is intended to solve the above problems by preventing the generation of wrinkles by means that enables the reinforcing film to be simultaneously overlapped with the electrodes on the entire surface of the overlapping portion. is there.

The invention according to claim 1 is a membrane electrode used for producing a membrane electrode assembly obtained by sandwiching a solid polymer electrolyte membrane and a frame-like reinforcing membrane between a first electrode and a second electrode. A joined body manufacturing jig, comprising: a first pressurizing plate having a first pressurizing portion having the same planar shape as that of the first electrode formed in a convex shape on the upper surface; and a through hole into which the first pressurizing portion is fitted. The formed first frame, and the second pressure plate disposed opposite to the first pressure plate via the stacked first electrode, the reinforcing membrane, the solid polymer electrolyte membrane, and the second electrode And the position of the height of the upper surface of the first frame body from a position higher than the upper surface of the first electrode placed on the upper surface of the first pressure unit to a position below the upper surface of the first electrode placed above. It has the 1st frame body upper surface height change means to move.
According to the present invention, the position of the height of the upper surface of the first frame body is a position higher than the upper surface of the first electrode placed on the upper surface of the first pressure member by the action of the first frame upper surface height changing means. To the same position as the upper surface of the placed first electrode. Here, when the reinforcing film is placed on the upper surface of the first frame body in a state where the upper surface of the first frame body is at a position higher than the upper surface of the first electrode placed on the upper surface of the first pressurizing unit, the reinforcing film The membrane does not contact the first electrode. Further, the solid polymer electrolyte membrane and the second electrode are stacked on the reinforcing membrane. When the second pressure plate is placed on the second electrode, the upper surface of the first frame moves to a position below the upper surface of the first electrode by the action of the first frame upper surface height changing means. Desirably, the upper surface of the first frame is moved to a position substantially equal to the upper surface of the first electrode. At this time, the reinforcing film placed on the upper surface of the first frame contacts and overlaps the first electrode.

In the above, wrinkles do not occur because the reinforcing film does not come into contact with the first electrode when placed on the upper surface of the first frame. When the second pressure plate is placed, the reinforcing film comes into contact with the first electrode. However, since the entire surface of the overlapping portion is simultaneously contacted and overlapped, wrinkles do not occur. Therefore, according to the present invention, it is possible to overlap the reinforcing film over the entire surface of the overlapped portion simultaneously with the electrode by the action of the first frame upper surface height changing means, and the reinforcing film is wrinkled. A membrane / electrode assembly can be produced without causing any problems.
According to a second aspect of the present invention, in the membrane electrode assembly manufacturing jig according to the first aspect, the first frame upper surface height changing means includes an upper surface of the pressure plate excluding the first pressure member. And in contact with the lower surface of the first frame.
According to the present invention, the pressure plate side contact portion where the upper surface of the pressure plate excluding the first pressure portion contacts the first frame body upper surface height changing means, the lower surface of the first frame body, and the The distance between the first frame body upper surface height changing means and the first frame body side contact portion is compressed or expanded by compressing or expanding the first frame upper surface height changing means itself. When placed on the upper surface, the first frame can be lifted so that the first electrode and the reinforcing film do not come into contact with each other. When the second pressure plate is placed, the reinforcing film comes into contact with the first electrode. If it does so, since it will contact and overlap simultaneously about the whole surface of the said superimposition part, a wrinkle will not be produced.
A third aspect of the present invention is the membrane electrode assembly manufacturing jig according to the second aspect, wherein the first frame upper surface height changing means is an upper surface of the pressure plate excluding the first pressure member. A first pressure plate upper surface depression provided in a concave shape and a first frame lower surface depression provided in a concave shape on the lower surface of the first frame body, and an upper surface of the pressure plate and a lower surface of the first frame body. The first frame upper surface height changing means is storably disposed in a space formed by the first pressure plate upper surface depression and the first frame lower surface depression in a state where the first pressure plate upper surface depression is in contact with each other. .
According to a fourth aspect of the present invention, in the membrane electrode assembly manufacturing jig according to the first aspect, the first frame upper surface height changing means includes an outer peripheral side surface of the pressure plate and the first frame body. It is provided in contact with the outer peripheral side surface.
According to the third and fourth aspects of the present invention, the position reproducibility is improved because the upper surface of the pressure plate and the lower surface of the first frame body are brought into contact with each other during pressurization.

The invention according to claim 5 is the membrane electrode assembly manufacturing jig according to any one of claims 1 to 4, wherein the first frame upper surface height changing means is an elastic body. And
The elastic body supports the first frame so that the upper surface of the first frame is positioned higher than the upper surface of the first electrode placed on the upper surface of the first pressure unit.
According to the present invention, when the second pressure plate is placed, the elastic body is reduced by receiving the load, so the height position of the upper surface of the first frame body is placed on the upper surface of the first pressure portion. It moves to a position substantially equal to the upper surface of the placed first electrode. In the above, the elastic body moves the height position of the upper surface of the first frame body by its elastic action, and the reinforcing film placed on the upper surface of the first frame body is applied to the electrode without causing wrinkles. It is possible to overlap.

The invention according to claim 6 is the membrane electrode assembly manufacturing jig according to claim 5, wherein the elastic body is a spring.
According to the present invention, the spring provided on the lower surface of the first pressure plate on the upper surface of the first pressure plate or on the lower surface of the first frame supports the first frame, and the height of the upper surface of the first frame is high. This position is set to a position higher than the upper surface of the first electrode placed on the upper surface of the first pressure unit. When the second pressure plate is placed, the spring shrinks in response to the load. Therefore, the height position of the upper surface of the first frame body is the first position placed on the upper surface of the first pressure portion. It moves to a position almost equal to the upper surface of the electrode. In the above, the spring moves the position of the height of the upper surface of the first frame body by its elastic action, and the reinforcing film placed on the upper surface of the first frame body is overlaid on the electrode without causing wrinkles. Make it possible.
A seventh aspect of the present invention is the membrane electrode assembly manufacturing jig according to any one of the first to sixth aspects, wherein the second pressure plate is a second pressure having the same planar shape as the second electrode. And a second frame having a through hole into which the second pressure member is fitted.

According to the present invention, since the second frame body stacks the solid polymer electrolyte membrane from above, when the second electrode is arranged in contact with the through hole in the central portion of the second frame body, Positioning of the two electrodes is facilitated.
An eighth aspect of the present invention is the membrane electrode assembly manufacturing jig according to any one of the first to sixth aspects, wherein the first pressurizing portion is formed in the through hole of the first frame body. Following the first step of placing the first electrode on the upper surface of the first pressurizing portion in the engaged state, and the first step, the height position of the upper surface of the first frame body is set to the first additional portion. The reinforcing membrane, the solid polymer electrolyte membrane, and the second electrode are stacked in this order on the upper surface of the first frame body in a state of being higher than the upper surface of the first electrode placed on the upper surface of the pressure portion. The second step, and, following the second step, sandwiching the first electrode, the reinforcing membrane, the solid polymer electrolyte membrane and the second electrode between the opposing first pressure plate and the second pressure plate, The third step of pressing and heating is performed.

According to the present invention, using the membrane electrode assembly manufacturing jig according to any one of claims 1 to 6, a membrane electrode assembly is formed by the first step, the second step, and the third step. When manufacturing, the height position of the upper surface of the first frame is moved by the action of the first frame upper surface height changing means. For this reason, the reinforcing film placed on the upper surface of the first frame can be overlaid on the electrode without causing wrinkles, and a membrane electrode assembly having a wrinkle-free reinforcing film can be manufactured.
The invention according to claim 9 uses the membrane electrode assembly manufacturing jig according to claim 7 to fit the first pressure member into the through-hole of the first frame body, and The first electrode is mounted on the upper surface of the first pressure unit in a state where the height of the upper surface of the first frame is set higher than the upper surface of the first electrode mounted on the upper surface of the first pressure unit. A first step of placing the reinforcing film and the solid polymer electrolyte membrane in this order on the upper surface of the first frame, and a second frame on the upper surface of the solid polymer electrolyte membrane. A second b step in which a body is placed and the second electrode is stacked on the upper surface of the solid polymer electrolyte membrane using the central through hole of the second frame as a guide, the stacked first electrode, the reinforcing membrane, Step 3a in which the solid polymer electrolyte membrane and the second electrode are sandwiched between a first pressure plate and a second pressure portion facing each other, and pressed and heated. And characterized in that to run in this order.
According to the present invention, since the second frame is placed before placing the second electrode, the second electrode is placed along the inner wall of the through hole provided in the center of the second frame. Easy to put on.

  According to the invention of any one of claims 1 to 7, the height of the upper surface of the first frame body by the action of the first frame upper surface height changing means provided in the membrane electrode assembly manufacturing jig. The position moves from a position higher than the upper surface of the first electrode placed on the upper surface of the first pressurizing unit to a position equal to the upper surface of the placed first electrode. As a result, the reinforcing film is placed on the upper surface of the first frame without contacting the first electrode, and when the second pressure plate is placed, the entire surface of the overlapping portion is simultaneously applied to the first electrode. Because they are stacked, there is no wrinkle. For this reason, the use of the membrane / electrode assembly production jig of the present invention makes it possible to produce a membrane / electrode assembly having a wrinkle-free reinforcing membrane.

  According to the invention described in claim 8, the first step, the second step and the third step using the membrane electrode assembly manufacturing jig according to any one of claims 1 to 6. Thus, when the membrane electrode assembly is manufactured, the height position of the first frame body upper surface is moved by the action of the first frame upper surface height changing means. For this reason, according to this manufacturing method, it becomes possible to overlap the reinforcing film placed on the upper surface of the first frame body on the electrode without causing wrinkles, and a membrane electrode assembly including a reinforcing film without wrinkles is obtained. Can be manufactured.

  According to the invention of claim 9, the reinforcing film placed on the upper surface of the first frame body can be overlaid on the electrode without causing wrinkles, and the membrane electrode having the reinforcing film without wrinkles is provided. A joined body can be manufactured. Furthermore, since the second electrode can be placed along the inner wall of the through hole provided at the center of the second frame, the second electrode can be easily positioned.

  Embodiments of the present invention will be described below with reference to the drawings. The reference numerals are common between the drawings, and description of overlapping parts is omitted.

FIG. 1 is a structural cross-sectional view of a membrane / electrode assembly manufacturing jig of the present invention in a state where a membrane / electrode assembly is pressurized.
The membrane / electrode assembly manufacturing jig of the present invention is obtained by sandwiching a solid polymer electrolyte membrane 1 and a frame-shaped reinforcing membrane 2 having a through hole in the center between a first electrode 3 and a second electrode 4. A membrane electrode assembly manufacturing jig used for manufacturing a membrane electrode assembly to be manufactured, wherein a first pressurizing portion 11a having the same planar shape as the first electrode 3 is formed on a top surface in a convex shape. A pressure plate 11, a first frame 12 having a through hole 12a into which the first pressure member 11a is fitted, the stacked first electrode 3, the reinforcing membrane 2, the solid polymer electrolyte membrane 1, and The height of the second pressure plate 14 disposed opposite to the first pressure plate 11 through the second electrode 4 and the height of the first frame upper surface 12b is set to the first pressure member upper surface 11b. Move from a position higher than the first electrode upper surface 13a placed on the first electrode upper surface 13a to the position below And a first frame top height changing means 13. And the said 1st frame upper surface height change means 13 is provided in contact with the upper surface 11c of the said pressurization board except the said 1st pressurization part 11a, and the said 1st frame lower surface 12c. The first frame upper surface height changing means 13 is preferably an elastic body, and more preferably a spring.
The first frame upper surface height changing means may be provided in contact with the outer peripheral side surface of the pressure plate and the outer peripheral side surface of the first frame body.

Using the above membrane electrode assembly manufacturing jig, a membrane electrode assembly having a wrinkle-free reinforcing film can be manufactured by the following steps.
FIG. 2 is a partial cross-sectional view of the membrane electrode assembly manufacturing jig of the present invention during manufacture of the membrane electrode assembly.
(First Step) First, in the first step, the first electrode 3 is placed on the upper surface 11b of the first pressure portion with the first pressure portion 11 fitted in the through hole of the first frame body 12. To do. Here, the first frame 12 is supported by means 13 for changing the height of the upper surface of the first frame. At this time, the height of the first frame upper surface 12b is higher than the height of the first electrode upper surface 3a placed on the first pressure member upper surface 11b.
(Second Step) In the second step following the first step, the height of the upper surface of the first frame body is set higher than the upper surface of the first electrode placed on the upper surface of the first pressure member. The reinforcing membrane, the solid polymer electrolyte membrane, and the second electrode are stacked in this order on the upper surface of the first frame. FIG. 2 shows a state of the membrane electrode assembly manufacturing jig when the first electrode 3 and the reinforcing membrane 2 are placed. The first frame 12 is supported by the first frame upper surface height changing means 13, and the height position of the first frame upper surface 12b is the first electrode upper surface 3a placed on the first pressurizing unit upper surface 11b. Higher position. For this reason, when the reinforcing film 2 is placed on the upper surface 12 b of the first frame body, there is a gap between the reinforcing film 2 and the first electrode 3, and the reinforcing film 2 is connected to the first electrode 3. There is no wrinkle because it does not touch the surface.
(Third Step) In the third step following the second step, the first electrode, the reinforcing membrane, the solid polymer electrolyte membrane, and the second electrode are sandwiched between the opposing first pressure plate and the second pressure plate and pressed. And heat. More specifically, when the first frame 12 supported by the first frame upper surface height changing means 13 receives a pressing force via the second pressure plate 14 in the sandwiching process, the first frame 12 The height position of the upper surface 12b of the first electrode 3 is moved from a position higher than the upper surface 3a of the first electrode 3 placed on the upper surface 11b of the first pressurizing unit to a position below the upper surface 3a of the first electrode 3. At this time, the reinforcing membrane 2 placed on the upper surface 12b of the first frame 12 descends together with the solid polymer electrolyte membrane 1 and the second electrode 4, and the first membrane 12 placed on the upper surface 11b of the first pressure member. One electrode 3 is overlapped. When the reinforcing film 2 overlaps the first electrode 3, the reinforcing film 2 contacts and overlaps the entire overlapping portion 5 at the same time, so that the reinforcing film 2 does not wrinkle. Further, from the position where the height position of the upper surface 12b of the first frame body 12 is higher than the upper surface 3a of the first electrode 3 placed on the upper surface 11b of the first pressure member by the weight of the second pressure plate 14 itself. Even when it is moved to a position below the upper surface 3a of the first electrode 3, the same effect is obtained. Next, the first electrode 3, the reinforcing membrane 2, the solid polymer electrolyte membrane 1 and the second electrode 4 that are stacked are heated while being pressed by the opposing first pressurizing unit 11 a and the second pressurizing plate 14. Then, the solid polymer electrolyte membrane 1 and the first electrode 3 and the solid polymer electrolyte membrane 1 and the second electrode 4 are joined together to produce a membrane electrode assembly. The pressing and heating conditions are preferably 3.9 MPa, 140 ° C., and 3 to 5 minutes.

FIG. 3 shows a structural cross section of another embodiment of the membrane / electrode assembly manufacturing jig according to the present invention. FIG. 3 shows the membrane electrode assembly manufacturing jig of FIG.
First, the first frame upper surface height changing means 13 includes a first pressure plate upper surface recess 11d provided in a concave shape on the upper surface 11c of the pressure plate excluding the first pressure member, and / or a lower surface of the first frame body. The first pressure plate upper surface depression 11d and the first frame lower surface depression 11d are provided in contact with the first frame lower surface depression 12d provided in a concave shape, and in contact with the upper surface of the pressure plate and the lower surface of the first frame body The first frame upper surface height changing means 13 is disposed so as to be housed in a space formed by the frame lower surface recess 12d.
Further, the second pressure plate 14 shown in FIG. 1 is separated into a second frame 14a and a second pressure portion 14b.

Next, a method for producing a membrane electrode assembly using the membrane electrode assembly production jig will be described.
(First Step) First, in the first step, the first electrode 3 is placed on the upper surface 11b of the first pressure portion with the first pressure portion 11 fitted in the through hole of the first frame body 12. To do. Here, the first frame 12 is supported by means 13 for changing the height of the upper surface of the first frame. At this time, the height of the first frame upper surface 12b is higher than the height of the first electrode upper surface 3a placed on the first pressure member upper surface 11b.

  (Step 2a) Subsequent to Step 1, in Step 2a, the reinforcing membrane and the solid polymer electrolyte membrane are stacked in this order on the upper surface of the first frame. The first frame 12 is supported by the first frame upper surface height changing means 13, and the height position of the first frame upper surface 12b is the first electrode upper surface 3a placed on the first pressurizing unit upper surface 11b. Higher position. For this reason, when the reinforcing film 2 is placed on the upper surface 12 b of the first frame body, there is a gap between the reinforcing film 2 and the first electrode 3, and the reinforcing film 2 is connected to the first electrode 3. There is no wrinkle because it does not touch the surface.

(Step 2b) Subsequent to the step 2a, in the step 2b, the second frame body 14a is placed on the upper surface of the solid polymer electrolyte membrane 1, and the center through hole of the second frame body 14a is used as a guide. The second electrode 4 is stacked on the upper surface of the solid polymer electrolyte membrane 1. More specifically, when the first frame 12 supported by the first frame upper surface height changing means 13 receives a pressing force due to the weight of the second frame 14a in the sandwiching process, the first frame 12 The height position of the upper surface 12b of the first electrode 3 is moved from a position higher than the upper surface 3a of the first electrode 3 placed on the upper surface 11b of the first pressurizing unit to a position below the upper surface 3a of the first electrode 3. At this time, the reinforcing membrane 2 placed on the upper surface 12b of the first frame 12 descends together with the solid polymer electrolyte membrane 1 and overlaps the first electrode 3 placed on the upper surface 11b of the first pressure member. It will be. When the reinforcing film 2 overlaps the first electrode 3, the reinforcing film 2 comes into contact with and overlaps the entire surface of the overlapping portion 5 almost simultaneously, so that the reinforcing film 2 does not wrinkle.
(Step 3a) Subsequent to step 2b, in step 3a, the second pressurizing portion 14b is placed on the second electrode 4 with the central through-hole of the second frame 14a as a guide, and the first is stacked. 1 electrode 3, reinforcing membrane 2, solid polymer electrolyte membrane 1, and second electrode 4 are sandwiched between opposing first pressurizing part 11 a and second pressurizing part 14 b, pressed and heated, to obtain a solid polymer electrolyte The membrane 1 and the first electrode 3 and the solid polymer electrolyte membrane 1 and the second electrode 4 are joined to produce a membrane electrode assembly. The pressing and heating conditions are preferably 3.9 MPa, 140 ° C., and 3 to 5 minutes.

Structural sectional view of the membrane / electrode assembly manufacturing jig of the present invention in a state where the membrane / electrode assembly is pressurized Cross-sectional view of a part of the membrane electrode assembly manufacturing jig of the present invention during manufacture of the membrane electrode assembly Structure sectional drawing of another form of the membrane electrode assembly manufacturing jig according to the present invention Cross-sectional view of membrane electrode assembly using reinforced membrane

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Solid polymer electrolyte membrane 2 Reinforcement membrane 3 1st electrode 3a Upper surface of 1st electrode 4 2nd electrode 5 Overlapping part of reinforcement membrane and 1st electrode 11 1st pressurization plate 11a 1st pressurization part 11b 1st pressurization part upper surface 11c Upper surface of pressure plate excluding first pressure member 11d First pressure plate upper surface depression 12 First frame body 12a First frame body through hole 12b First frame upper surface 12c First frame lower surface 12d First frame body Lower surface depression 13 First frame upper surface height changing means 14 Second pressure plate 14a Second frame 14b Second pressure part

Claims (9)

  A membrane / electrode assembly production jig used for producing a membrane / electrode assembly obtained by sandwiching a solid polymer electrolyte membrane and a frame-like reinforcing membrane between a first electrode and a second electrode, A first pressure plate in which a first pressure member having the same planar shape as the first electrode is formed on the upper surface, a first frame body having a through-hole into which the first pressure member is fitted, A second pressure plate disposed opposite to the first pressure plate via the overlapped first electrode, the reinforcing membrane, the solid polymer electrolyte membrane, and the second electrode; and an upper surface of the first frame body The first frame upper surface height that moves from a position higher than the upper surface of the first electrode placed on the upper surface of the first pressurizing unit to a position lower than the upper surface of the first electrode placed above. A membrane electrode assembly manufacturing jig comprising a changing means.   The first frame upper surface height changing means is provided in contact with an upper surface of the pressure plate excluding the first pressure member and a lower surface of the first frame body. The membrane electrode assembly manufacturing jig described. The first frame upper surface height changing means is provided on the upper surface of the pressure plate excluding the first pressure member, and on the lower surface of the first frame, and / or on the lower surface of the first frame. The first pressure plate upper surface depression and the first frame body lower surface are provided in contact with the concave lower surface of the first frame body lower surface, and the upper surface of the pressure plate and the lower surface of the first frame body are in contact with each other. The membrane electrode assembly manufacturing jig according to claim 2, wherein the first frame upper surface height changing means is disposed so as to be accommodated in a space formed by a depression.   2. The membrane electrode assembly manufacturing method according to claim 1, wherein the first frame upper surface height changing means is provided in contact with an outer peripheral side surface of the pressure plate and an outer peripheral side surface of the first frame body. jig.   The membrane electrode assembly manufacturing jig according to any one of claims 1 to 4, wherein the first frame upper surface height changing means is an elastic body.   The membrane electrode assembly manufacturing jig according to claim 5, wherein the elastic body is a spring.   The second pressure plate includes a second pressure portion having the same planar shape as the second electrode, and a second frame body having a through hole into which the second pressure portion is fitted. The membrane electrode assembly manufacturing jig according to any one of claims 1 to 6.   The membrane electrode assembly manufacturing jig according to any one of claims 1 to 6, wherein the first pressurizing portion is fitted in a through-hole of the first frame body, and the first electrode The first step of placing the first electrode on the upper surface of the pressure unit, and the first step of placing the height position of the upper surface of the first frame body on the upper surface of the first pressure unit following the first step. A second step of stacking the reinforcing membrane, the solid polymer electrolyte membrane and the second electrode in this order on the upper surface of the first frame in a state of being higher than the upper surface of one electrode; Subsequent to the step, a third step is performed in which the first electrode, the reinforcing membrane, the solid polymer electrolyte membrane, and the second electrode are sandwiched between the opposing first pressure plate and the second pressure plate, and pressed and heated. A method for producing a membrane electrode assembly, characterized in that:   The membrane electrode assembly manufacturing jig according to claim 7, wherein the first pressurizing portion is fitted into the through hole of the first frame body, and the height of the upper surface of the first frame body is set. A first step of placing the first electrode on the upper surface of the first pressurizing unit in a state where the position is higher than the upper surface of the first electrode placed on the upper surface of the first pressurizing unit; A second step (a) in which the reinforcing membrane and the solid polymer electrolyte membrane are stacked in this order on the upper surface of one frame; and the second frame is placed on the upper surface of the solid polymer electrolyte membrane. A second b step for stacking the second electrode on the upper surface of the solid polymer electrolyte membrane using the central through hole as a guide, and a second additional electrode on the second electrode using the central through hole of the second frame as a guide. The first electrode, the reinforcing membrane, the solid polymer electrolyte membrane, and the second electrode, which are stacked with pressure parts, are placed between the first pressure plate and the second pressure. And by pinching, pressing and the 3a step a method for manufacturing a membrane electrode assembly, characterized in that to perform in this order to heat.

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