JP5400414B2 - Electrolyzer - Google Patents

Description

  The present invention relates to an electrolytic device in which a power feeding body is provided on both sides of an electrolyte membrane, and a separator is stacked on the power feeding body.

  For example, in a polymer electrolyte fuel cell, a fuel gas (a gas containing mainly hydrogen, such as hydrogen gas) is supplied to the anode side electrode, while an oxidant gas (mainly containing oxygen) is supplied to the cathode side electrode. By supplying a gas (for example, air), direct current electric energy is obtained.

  In general, a water electrolysis apparatus is employed to produce hydrogen gas that is a fuel gas. This water electrolysis apparatus uses a solid polymer electrolyte membrane (ion exchange membrane) in order to decompose water and generate hydrogen (and oxygen). Electrode catalyst layers are provided on both sides of the solid polymer electrolyte membrane to form an electrolyte membrane / electrode structure, and a power feeder is provided on both sides of the electrolyte membrane / electrode structure. It is configured. That is, the unit is configured substantially in the same manner as the above fuel cell.

  Therefore, in a state where a plurality of units are stacked, a voltage is applied to both ends in the stacking direction, and water is supplied to the anode-side power feeding body. For this reason, water is decomposed and hydrogen ions (protons) are generated on the anode side of the electrolyte membrane / electrode structure, and the hydrogen ions permeate the solid polymer electrolyte membrane and move to the cathode side to bond with electrons. Thus, hydrogen is produced. On the other hand, on the anode side, oxygen produced together with hydrogen is discharged from the unit with excess water.

  As this type of equipment, for example, a power feeder disclosed in Patent Document 1 is known. In this patent document 1, as shown in FIG. 15, the double structure electric power feeding body 3 is comprised by couple | bonding the powder sintering part 1 and the fiber sintering part 2 integrally.

  The powder sintered part 1 is formed by sintering titanium powder, while the fiber sintered part 2 is formed by sintering a titanium fiber sheet. The double structure power feeder 3 is used in a state where the powder sintered portion 1 is in pressure contact with the solid electrolyte membrane 4 in the electrolytic cell of the hydrogen oxygen generator.

JP 2001-279482 A

  However, in Patent Document 1 described above, since the powder sintered portion 1 is formed by sintering titanium powder, the powder sintered portion 1 is likely to have variations in opening due to the aggregation state of the particles, and the diameter of the opening is small. The distribution becomes wide. For this reason, when the double structure power supply 3 is applied to a high pressure water electrolysis apparatus that generates high pressure hydrogen, when the solid electrolyte membrane 4 is brought into pressure contact with the powder sintered portion 1 due to a differential pressure between the anode side and the cathode side. There is a problem that damage such as damage occurs in the solid electrolyte membrane 4.

  The present invention solves this type of problem, and an object thereof is to provide an electrolysis apparatus capable of preventing damage to an electrolyte membrane as much as possible with a simple configuration.

  The present invention relates to an electrolytic apparatus in which a power feeding body is provided on both sides of an electrolyte membrane, and a separator is stacked on the power feeding body. In this electrolysis apparatus, a protective sheet member having a large number of through holes is interposed between the electrolyte membrane and the power feeding body, and the diameter of the through holes is increased toward the electrolyte membrane at both ends. And a second tapered portion that expands toward the power feeding body.

  The power supply body includes an anode-side power supply body to which water is supplied, and a cathode-side power supply body from which hydrogen higher than normal pressure is obtained by electrolysis of the water, and the protective sheet member includes the electrolyte membrane and the above-mentioned It is preferable to interpose between the anode-side power feeder.

Furthermore, the electrolytic apparatus of the present invention, the feed body is a large number of through-holes formed at both ends of the through hole includes a first tapered portion whose diameter increases toward the electrolyte membrane, from the electrolyte membrane a second tapered portion whose diameter increases in a direction away, with is provided, and the anode current collector which water is supplied, while being formed of a porous conductive material without providing a through-hole, the water A cathode-side power feeder that can obtain hydrogen at a pressure higher than normal pressure by electrolysis of the cathode, a cathode flow path in which the high-pressure hydrogen is generated during electrolysis, water and oxygen at normal pressure that are generated The electrolyte membrane is pressed against the anode-side power feeder by a pressure difference with the anode flow path through which the gas flows .

The anode flow path is provided in a range corresponding to the surface area of the anode-side power supply body on the surface of the separator facing the anode-side power supply body, while the cathode flow path faces the cathode-side power supply body of the separator. it is preferable et provided within a range corresponding to the surface area of the cathode current collector is in the plane.

  According to the present invention, the protective sheet member interposed between the electrolyte membrane and the power feeding body, or the power feeding body is provided with a plurality of through holes, and the through holes can be easily controlled in opening diameter. Done.

  Furthermore, since the 1st taper-shaped part which diameter-expands toward an electrolyte membrane is provided in the end of the through-hole, the shearing and elongation of the said electrolyte membrane within the said through-hole are suppressed favorably. Thereby, it is possible to prevent the electrolyte membrane from being damaged as much as possible with a simple configuration.

  In addition, the other end of the through hole is provided with a second tapered portion that expands in diameter toward the power supply body or in a direction away from the electrolyte membrane. For this reason, water is smoothly introduced into the through hole, the water is satisfactorily supplied to the electrolyte membrane, and the generated gas can be easily detached. Thereby, it is possible to improve the water supply property and the gas detachability with a simple configuration.

It is a perspective explanatory view of a water electrolysis device concerning a 1st embodiment of the present invention. It is a partial cross section side view of the water electrolysis device. It is a disassembled perspective explanatory drawing of the unit cell which comprises the said water electrolysis apparatus. It is sectional explanatory drawing of the said unit cell. It is principal part expanded sectional explanatory drawing of the said unit cell. It is principal part expanded sectional explanatory drawing of the unit cell which comprises the water electrolysis apparatus which concerns on the 2nd Embodiment of this invention. It is principal part expanded sectional explanatory drawing of the unit cell which comprises the water electrolysis apparatus which concerns on the 3rd Embodiment of this invention. It is principal part expanded sectional explanatory drawing of the unit cell which comprises the water electrolysis apparatus which concerns on the 4th Embodiment of this invention. It is a section explanatory view of a unit cell which constitutes a water electrolysis device concerning a 5th embodiment of the present invention. It is a section explanatory view of a unit cell which constitutes a water electrolysis device concerning a 6th embodiment of the present invention. It is a section explanatory view of a unit cell which constitutes a water electrolysis device concerning a 7th embodiment of the present invention. It is a perspective explanatory view of an anode side power supply channel member which constitutes the unit cell. It is the XIII-XIII sectional view taken on the line of FIG. It is sectional explanatory drawing of the anode side electric power feeding flow path member which comprises the water electrolysis apparatus which concerns on the 8th Embodiment of this invention. It is explanatory drawing of the electric power feeder currently disclosed by patent document 1. FIG.

  As shown in FIG.1 and FIG.2, the water electrolysis apparatus 10 which concerns on the 1st Embodiment of this invention comprises the high pressure hydrogen production apparatus, and the several unit cell 12 is horizontal (arrow A direction) or A laminate 14 is provided that is laminated in the vertical direction (arrow B direction). At one end in the stacking direction of the stacked body 14, a terminal plate 16a, an insulating plate 18a, and an end plate 20a are sequentially disposed. Similarly, a terminal plate 16b, an insulating plate 18b, and an end plate 20b are sequentially disposed at the other end of the stacked body 14 in the stacking direction.

  The water electrolysis apparatus 10 integrally clamps and holds the disk-shaped end plates 20a and 20b via a plurality of tie rods 22 extending in the direction of arrow A, for example. The water electrolysis apparatus 10 may employ a configuration in which the water electrolysis apparatus 10 is integrally held by a box-like casing (not shown) including the end plates 20a and 20b as end plates. Moreover, although the water electrolysis apparatus 10 has a substantially cylindrical shape as a whole, it can be set in various shapes such as a cubic shape.

  As shown in FIG. 1, terminal portions 24a and 24b are provided on the side portions of the terminal plates 16a and 16b so as to protrude outward. The terminal portions 24a and 24b are electrically connected to the power source 28 via the wirings 26a and 26b. The terminal portion 24 a on the anode (anode) side is connected to the positive pole of the power source 28, while the terminal portion 24 b on the cathode (cathode) side is connected to the negative pole of the power source 28.

  As shown in FIGS. 2 to 4, the unit cell 12 includes a disc-shaped electrolyte membrane / electrode structure 32, and an anode separator 34 and a cathode separator 36 that sandwich the electrolyte membrane / electrode structure 32. . The anode-side separator 34 and the cathode-side separator 36 have a disk shape, and are made of, for example, a carbon member or the like, or are used for corrosion protection on a steel plate, a stainless steel plate, a titanium plate, an aluminum plate, a plated steel plate, or a metal surface thereof. The metal plate that has been subjected to the above surface treatment is press-molded or cut and subjected to a corrosion-resistant surface treatment.

  The electrolyte membrane / electrode structure 32 includes, for example, a solid polymer electrolyte membrane 38 in which a perfluorosulfonic acid thin film is impregnated with water, and an anode-side power feeder 40 disposed on both sides of the solid polymer electrolyte membrane 38. And a cathode-side power feeder 42.

  An anode electrode catalyst layer 40a and a cathode electrode catalyst layer 42a are formed on both surfaces of the solid polymer electrolyte membrane 38. The anode electrode catalyst layer 40a uses, for example, a Ru (ruthenium) -based catalyst, while the cathode electrode catalyst layer 42a uses, for example, a platinum catalyst.

  The anode-side power supply body 40 and the cathode-side power supply body 42 are made of, for example, a sintered body (porous conductor) of spherical atomized titanium powder. The anode-side power supply body 40 and the cathode-side power supply body 42 are provided with a smooth surface portion that is etched after grinding, and the porosity is set within a range of 10% to 50%, more preferably 20% to 40%. Is done.

  As shown in FIGS. 3 and 4, a protective sheet member 44 in which a large number of through holes 44 a are formed is interposed between the solid polymer electrolyte membrane 38 and the anode-side power feeder 40. The protective sheet member 44 is made of, for example, a titanium sheet, and the thickness is set within a range of, for example, 20 μm to 500 μm. The surface roughness of the titanium sheet is set to 6.3 μm or less, preferably 3.2 μm or less. This titanium sheet is preferably formed by cold rolling.

  The through hole 44 a is set such that the distribution width of the through hole 44 a is smaller than the distribution width of the hole portion of the anode power feeding body 40. One end of the through-hole 44a is provided with a first tapered portion 45a that expands toward the solid polymer electrolyte membrane 38, while the other end of the through-hole 44a expands toward the anode-side power feeding body 40. A second taper-shaped portion 45b having a diameter is provided. The through hole 44a is not limited to a circular shape, and may be any shape as long as it does not damage the solid polymer electrolyte membrane 38. The shape can be set.

  As shown in FIG. 5, the taper angle θ of the first tapered portion 45a is set in the range of 5 ° <θ <85 °, more preferably in the range of 30 ° <θ <60 °. The depth L of the first tapered portion 45a and the inner diameter D of the through hole 44a are set to dimensions that do not damage the solid polymer electrolyte membrane 38. The through-hole 44a can be formed by various manufacturing methods. For example, in addition to etching, processing such as micro drilling, electron beam, laser, or cutting from both sides can be employed.

  As shown in FIG. 3, the outer peripheral edge of the unit cell 12 communicates with each other in the direction of arrow A, which is the stacking direction, and a water supply communication hole 46 for supplying water (pure water) and produced by reaction. A discharge communication hole 48 for discharging the generated oxygen and used water and a hydrogen communication hole 50 for flowing hydrogen generated by the reaction are provided.

  A surface 34 a of the anode separator 34 facing the electrolyte membrane / electrode structure 32 is provided with a supply passage 52 a communicating with the water supply communication hole 46 and a discharge passage 52 b communicating with the discharge communication hole 48. A first flow path 54 communicating with the supply passage 52a and the discharge passage 52b is provided on the surface 34a. The first flow path 54 is provided in a range corresponding to the surface area of the anode-side power feeding body 40, and includes a plurality of flow path grooves, a plurality of embosses, and the like (see FIGS. 2 and 4).

  As shown in FIG. 3, a discharge passage 56 that communicates with the hydrogen communication hole 50 is provided on the surface 36 a of the cathode separator 36 that faces the electrolyte membrane / electrode structure 32. A second flow path 58 communicating with the discharge passage 56 is formed on the surface 36a. The second flow path 58 is provided within a range corresponding to the surface area of the cathode-side power feeding body 42, and includes a plurality of flow path grooves, a plurality of embosses, and the like (see FIGS. 2 and 4).

  The seal members 60a and 60b are integrated with each other around the outer peripheral ends of the anode side separator 34 and the cathode side separator 36. The seal members 60a and 60b include, for example, EPDM, NBR, fluorine rubber, silicone rubber, fluorosilicone rubber, butyl rubber, natural rubber, styrene rubber, chloroprene, acrylic rubber, or other seal materials, cushion materials, or packing materials. Used.

  As shown in FIGS. 1 and 2, pipes 62a, 62b and 62c communicating with the water supply communication hole 46, the discharge communication hole 48 and the hydrogen communication hole 50 are connected to the end plate 20a. Although not shown, the pipe 62c is provided with a back pressure valve (or electromagnetic valve), and the pressure of hydrogen generated in the hydrogen communication hole 50 can be maintained at a high pressure.

  The operation of the water electrolysis apparatus 10 configured as described above will be described below.

  As shown in FIG. 1, water is supplied from a pipe 62a to the water supply communication hole 46 of the water electrolysis apparatus 10, and a power supply 28 electrically connected to the terminal portions 24a and 24b of the terminal plates 16a and 16b is connected. A voltage is applied via For this reason, as shown in FIG. 3, in each unit cell 12, water is supplied from the water supply communication hole 46 to the first flow path 54 of the anode separator 34, and this water flows along the anode power supply body 40. Moving.

  Accordingly, water is decomposed by electricity in the anode electrode catalyst layer 40a, and hydrogen ions, electrons, and oxygen are generated. Hydrogen ions generated by this anodic reaction permeate the solid polymer electrolyte membrane 38 and move to the cathode electrode catalyst layer 42a side, and combine with electrons to obtain hydrogen.

  For this reason, hydrogen flows along the second flow path 58 formed between the cathode side separator 36 and the cathode side power supply body 42. This hydrogen is maintained at a higher pressure than the water supply communication hole 46, and can flow out of the water electrolysis apparatus 10 through the hydrogen communication hole 50. On the other hand, oxygen generated by the reaction and used water flow in the first flow path 54, and these are discharged to the outside of the water electrolysis apparatus 10 along the discharge communication hole 48. The second channel 58 has a higher pressure than the first channel 54.

  In this case, in the first embodiment, as shown in FIG. 4, a protective sheet member 44 provided with a plurality of through holes 44 a is interposed between the solid polymer electrolyte membrane 38 and the anode-side power feeder 40. ing. For this reason, the solid polymer electrolyte membrane 38 is transferred to the anode-side power supply body 40 by a pressure difference between the second flow path 58 in which high-pressure hydrogen gas is generated and the normal pressure first flow path 54 through which water and oxygen flow. The solid polymer electrolyte membrane 38 does not come into direct contact with the anode-side power feeder 40 when pressed toward the surface.

  Further, the opening diameter of the through hole 44a provided in the protective sheet member 44 can be easily controlled. Therefore, in the protective sheet member 44, the opening diameter of the through hole 44a can be set within a narrow range, and the distribution width can be set to be significantly narrower than the distribution width of the anode-side power feeding body 40.

  Furthermore, a first taper-shaped portion 45a that expands toward the solid polymer electrolyte membrane 38 is provided at one end of the through hole 44a. For this reason, as shown in FIG. 5, the shearing and elongation of the solid polymer electrolyte membrane 38 in the through hole 44a are satisfactorily suppressed.

  In addition, a second taper-shaped portion 45b whose diameter increases toward the anode-side power supply body 40 is provided at the other end of the through hole 44a. As a result, as shown in FIG. 5, water is smoothly introduced from the anode-side power feeder 40 into the through hole 44a, and the water is satisfactorily supplied to the anode electrode catalyst layer 40a of the solid polymer electrolyte membrane 38. It becomes possible. On the other hand, oxygen generated in the anode electrode catalyst layer 40a smoothly moves to the anode-side power supply body 40 along the second tapered portion 45b of the through hole 44a, and the release of the oxygen is easily performed.

  Therefore, in the first embodiment, the through hole 44a has the first tapered portion 45a that expands toward the solid polymer electrolyte membrane 38 and the second tapered portion 45b that expands toward the anode-side power supply body 40. It is only necessary to provide. Thereby, with the simple configuration, it is possible to prevent the solid polymer electrolyte membrane 38 from being damaged as much as possible and to improve the water supply property and the gas detachability.

  In the first embodiment, at least the opening shape of the first tapered portion 45a on the solid polymer electrolyte membrane 38 side and the opening cross-sectional shape of the through hole 44a are preferably circular, but the present invention is not limited to this. Absent. Any shape that does not damage the solid polymer electrolyte membrane 38 may be, for example, an elliptical shape or a rectangular shape, and various selections are possible. On the other hand, the shape of the second tapered portion 45b can be set to various shapes such as an elliptical shape, a triangular shape, or a polygonal shape in addition to a circular shape.

  FIG. 6 is an enlarged cross-sectional explanatory view of a main part of the unit cell 70 constituting the water electrolysis apparatus according to the second embodiment of the present invention.

  In addition, the same referential mark is attached | subjected to the component same as the unit cell 12 which comprises the water electrolysis apparatus 10 which concerns on 1st Embodiment, and the detailed description is abbreviate | omitted. Similarly, in the third and subsequent embodiments described below, detailed description thereof is omitted.

  The unit cell 70 includes a protective sheet member 72 interposed between the solid polymer electrolyte membrane 38 and the anode-side power supply body 40. The protective sheet member 72 is made of, for example, a titanium sheet and has a plurality of through holes 72a.

  One end of the through hole 72a is provided with a first tapered portion 74a that expands toward the solid polymer electrolyte membrane 38, and the other end of the through hole 72a expands toward the anode-side power feeder 40. A second taper-shaped portion 74b is provided. The 1st taper-shaped part 74a and the 2nd taper-shaped part 74b are comprised by the curved surface which cross-sectional opening shape has a substantially semicircle.

  In the second embodiment, the protective sheet member 72 is provided with a plurality of through holes 72 a, and the first tapered part 74 a that expands toward the solid polymer electrolyte membrane 38 at both ends of the through hole 72 a. And a second taper-shaped portion 74 b that increases in diameter toward the anode-side power supply body 40. Therefore, in the second embodiment, the same effect as in the first embodiment can be obtained, and water and oxygen can smoothly flow through the through hole 72a by the curved surface.

  FIG. 7 is an enlarged cross-sectional explanatory view of a main part of a unit cell 80 constituting a water electrolysis apparatus according to the third embodiment of the present invention.

  The unit cell 80 includes a protective sheet member 82 interposed between the solid polymer electrolyte membrane 38 and the anode-side power supply body 40. The protective sheet member 82 is provided with a plurality of through-holes 82 a, and the through-holes 82 a expand toward the anode-side power supply body 40 and a first tapered portion 84 a that expands toward the solid polymer electrolyte membrane 38. A second tapered portion 84b having a diameter.

  The maximum opening diameter D1 on the solid polymer electrolyte membrane 38 side of the first taper-shaped portion 84a is set to be smaller than the maximum opening diameter D2 on the anode-side power feeder 40 side of the second taper-shaped portion 84b (D1 <D2 ). Therefore, the protective sheet member 82 can supply water more smoothly without increasing the thickness.

  FIG. 8 is an enlarged cross-sectional explanatory view of a main part of a unit cell 90 constituting a water electrolysis apparatus according to the fourth embodiment of the present invention.

  The unit cell 90 includes a protective sheet member 92 interposed between the solid polymer electrolyte membrane 38 and the anode-side power supply body 40. The protective sheet member 92 is provided with a plurality of through-holes 92a. The through-holes 92a are curved first tapered portions 94a whose diameter increases toward the solid polymer electrolyte membrane 38, and the anode-side power supply body 40. And a second tapered portion 94b having a curved surface shape whose diameter increases toward the center. The maximum opening diameter D3 of the first tapered portion 94a is set smaller than the maximum opening diameter D4 of the second tapered portion 94b (D3 <D4).

  In said 3rd and 4th embodiment, the effect similar to 1st and 2nd embodiment mentioned above is acquired.

  FIG. 9 is a cross-sectional explanatory view of a unit cell 100 constituting a water electrolysis apparatus according to the fifth embodiment of the present invention.

  The unit cell 100 includes an anode-side power feeding plate 102 instead of the anode-side power feeding body 40. The anode power feeding plate 102 is provided with a plurality of through holes 102a by performing microporous processing such as etching, electron beam, laser, drill, discharge, punching, or expanded metal. The diameter of the through hole 102 a is set to be larger than the diameter of the through hole 44 a of the protective sheet member 44.

  In addition, in 5th Embodiment, although the protective sheet member 44 of 1st Embodiment is used, it can replace with this and can apply 2nd-4th embodiment.

  FIG. 10 is an explanatory cross-sectional view of a unit cell 110 constituting a water electrolysis apparatus according to the sixth embodiment of the present invention.

  The unit cell 110 includes an anode-side power feeding plate 112 interposed between the anode-side separator 34 and the solid polymer electrolyte membrane 38. The anode side power feeding plate 112 is employed in place of, for example, the anode side power feeding body 40 and the protective sheet member 44 used in the first embodiment, and is substantially used in the third embodiment. The protective sheet member 82 or the protective sheet member 92 used in the fourth embodiment can be applied.

  Thereby, in the sixth embodiment, in addition to the same effects as those in the first to fifth embodiments, there are advantages that the number of parts can be reduced and the configuration can be simplified.

  FIG. 11 is an explanatory cross-sectional view of a unit cell 120 constituting a water electrolysis apparatus according to a seventh embodiment of the present invention.

  The unit cell 120 includes an anode-side flow path member 122 interposed between the solid polymer electrolyte membrane 38 and the anode-side separator 34. As shown in FIGS. 12 and 13, the anode side power supply flow path member 122 has a substantially disk shape made of, for example, a titanium plate.

  A plurality of through holes 122 a are formed on the surface of the anode-side power supply flow path member 122 that faces the solid polymer electrolyte membrane 38. The through-hole 122a includes a first tapered portion 124a that increases in diameter toward the solid polymer electrolyte membrane 38 and a second tapered portion 124b that increases in diameter in a direction away from the solid polymer electrolyte membrane 38. Have. A plurality of first flow paths 126 arranged in parallel with each other are formed on the opposite surface of the anode-side power supply flow path member 122. The first flow path 126 is configured in a straight line by communicating with a predetermined second tapered portion 124b.

  In the seventh embodiment, the same effects as those of the first to sixth embodiments can be obtained. For example, the first flow path 54, the anode-side power feeder 40, and the protective sheet member in the first embodiment can be obtained. Instead of 44, a single anode-side power supply flow path member 122 can be used. Thereby, there exists an advantage that the structure of the whole unit cell 120 is simplified further.

  FIG. 14 is an explanatory cross-sectional view of the anode-side power supply flow path member 130 constituting the water electrolysis apparatus according to the eighth embodiment of the present invention.

  The anode side power supply flow path member 130 is configured in substantially the same manner as the anode side power supply flow path member 122 of the seventh embodiment, and is provided with a plurality of through holes 130a. The through hole 130a includes a first tapered portion 132a having a curved shape and a second tapered portion 132b having a curved shape. The 1st flow path 134 is formed by communicating the 2nd taper-shaped part 132b for every predetermined site | part. Therefore, in the eighth embodiment, the same effect as in the seventh embodiment can be obtained.

DESCRIPTION OF SYMBOLS 10 ... Water electrolysis apparatus 12, 70, 80, 90, 100, 110, 120 ... Unit cell 14 ... Laminated body 16a, 16b ... Terminal plate 18a, 18a ... Insulation plate 20a, 20b ... End plate 24a, 24b ... Terminal part 28 ... Power source 32 ... Electrolyte membrane / electrode structure 34 ... Anode-side separator 36 ... Cathode-side separator 38 ... Solid polymer electrolyte membrane 40 ... Anode-side power supply 42 ... Cathode-side power supply 44, 72, 82, 92 ... Protective sheet member 44a, 72a, 82a, 92a, 102a, 122a, 130a ... through holes 45a, 45d, 74a, 74b, 84a, 84b, 94a, 94b, 124a, 124b, 132a, 132b ... taper-shaped portion 46 ... water supply communication hole 48 ... discharge communication hole 50 ... hydrogen communication hole 54, 58, 126, 134 ... flow path 1 2,112 ... anode current plate 122, 130 ... anode current channel member

Claims (4)

An electrolytic device in which a power feeding body is provided on both sides of an electrolyte membrane, and a separator is stacked on the power feeding body,
Between the electrolyte membrane and the power feeder, a protective sheet member having a large number of through holes is interposed,
At both ends of the through-hole, a first tapered portion that expands toward the electrolyte membrane, and
A second tapered portion that expands toward the power supply;
Is provided. The electrolyzer according to claim 1, wherein the power feeding body includes an anode power feeding body to which water is supplied;
A cathode-side power feeder that can obtain hydrogen at a pressure higher than normal pressure by electrolysis of the water;
With
The electrolysis apparatus, wherein the protective sheet member is interposed between the electrolyte membrane and the anode-side power feeding body. An electrolytic device in which a power feeding body is provided on both sides of an electrolyte membrane, and a separator is stacked on the power feeding body,
Expanded the power feeder is a large number of through-holes formed, the both ends of the through hole, a first tapered portion whose diameter increases toward the electrolyte membrane, in a direction away from the electrolyte membrane A second taper-shaped portion, and an anode-side power feeder to which water is supplied,
A cathode-side power feeder that is formed of a porous conductor without providing a through-hole, and that can obtain hydrogen higher than normal pressure by electrolysis of the water;
With
During the electrolysis operation, the electrolyte membrane is pressed against the anode-side power supply body by a pressure difference between the cathode flow channel in which the high-pressure hydrogen is generated and the anode flow channel in which the water and generated normal-pressure oxygen flow. Electrolytic apparatus characterized by being made . The electrolyzer according to claim 3 , wherein the anode flow path is provided in a range corresponding to a surface area of the anode-side power supply body on a surface of the separator facing the anode-side power supply body,
The cathode passage, an electrolytic device according to claim provided et the possible within a range corresponding to the surface area of the cathode current collector the cathode current collector to the surface facing to the separator.

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