KR20060121684A - Monopolar membrane-electrode assembly - Google Patents

Abstract

Provided is a monopolar membrane-electrode assembly, which has a high battery efficiency by disposing a current collector on a catalyst layer and hardly causes a fuel leakage because the current collector of a thin film type exists between a membrane and an electrode. The monopolar membrane-electrode assembly(100) comprises: an electrolytic membrane(110) in which many cell regions are formed; an anode current collector(120) and a cathode current collector(160) installed at the cell region on the both surfaces of the electrolytic membrane(110); and an anode electrode(130) and a cathode electrode(170) installed on the anode current collector(120) and the cathode current collector(160), respectively.

Description

Monopolar membrane-electrode assembly

1 is a schematic cross-sectional view of a monopolar membrane-electrode assembly in which a current collector is inserted according to a first embodiment of the present invention.

FIG. 2 is a plan view illustrating an electrolyte membrane of the fuel cell of FIG. 1.

3 and 4 are plan views showing current collectors inserted into the membrane electrode assembly of FIG. 1, respectively.

5 is a schematic cross-sectional view of a monopolar membrane-electrode assembly according to a second embodiment of the present invention.

6 and 7 are plan views illustrating current collectors inserted into the membrane electrode assembly of FIG. 5.

8 is a schematic cross-sectional view of a monopolar membrane-electrode assembly incorporating a current collector according to a third embodiment of the present invention.

FIG. 9 is a plan view of the supporting body of FIG. 8. FIG.

10 and 11 are plan views illustrating a current collector, a conductive part, and a terminal formed on the support of FIG. 8, respectively.

12 is a schematic exploded perspective view of a membrane-electrode assembly in which a current collector is inserted according to a fourth embodiment of the present invention.

FIG. 13 illustrates the performance of a fuel cell unit cell including a membrane-electrode assembly in which a current collector is inserted between an electrolyte membrane and a catalyst layer according to an embodiment of the present invention, and a Ni-mesh current collector outside the electrode according to the prior art. It is a graph comparing the performance of the unit cell used.

14 is a graph showing the performance of a membrane-electrode assembly fuel cell unit cell in which a current collector is inserted between a catalyst layer and a fuel diffusion unit manufactured according to an embodiment of the present invention.

FIG. 15 is a graph showing the performance of a fuel cell having a 12-cell membrane-electrode assembly in which a current collector is inserted in an embodiment of the present invention.

FIG. 16 is a graph illustrating power density over time of the fuel cell of FIG. 15.

The present invention relates to a structure of a monopolar direct liquid fuel cell for use as a power source for portable electronic devices, and more particularly, to a monopolar membrane-electrode assembly in which a current collector is disposed above or below a catalyst. will be.

Direct Methanol Fuel Cell (DMFC) is a power generating device that generates electricity by the reaction of methanol as fuel and oxygen as oxidant. It has very high energy density and power density, and it uses methanol directly as fuel. It does not require peripherals such as reformers and has the advantage of easy storage and supply of fuel.

Monopolar DMFC is a method of manufacturing a thin DMFC by reducing the thickness and volume by arranging a plurality of cells in one electrolyte membrane and connecting each cell in series.

U.S. Patent No. 6,410,180 discloses a mesh type current collector and a conductive part connecting the current collectors to each electrode. However, the position of the current collector on the electrode causes a step between the electrode and the current collector, so that fuel may leak, and liquid fuel may leak through the conductive portion. In addition, an increase in contact resistance between the current collector and the electrode and an increase in resistance generated when electrons generated in the catalyst layer move through the fuel diffusion part and the electrode support of the electrode to the current collector may reduce the efficiency of the fuel cell.

It is an object of the present invention to provide a monopolar membrane-electrode assembly with minimal resistance by forming a current collector between the electrode and the membrane.

It is an object of the present invention to provide a monopolar membrane-electrode assembly with minimal resistance by forming a current collector between the electrode and the membrane.

It is another object of the present invention to provide a monopolar membrane-electrode assembly which minimizes resistance by forming a current collector between a catalyst layer and a fuel diffusion part in an electrode.

In order to achieve the above object, a monopolar membrane-electrode assembly according to an embodiment of the present invention is:

An electrolyte membrane in which a plurality of cell regions are formed;

An anode current collector and a cathode current collector respectively installed in the cell region on both sides of the electrolyte membrane;

And an anode electrode and a cathode electrode provided on the anode current collector and the cathode current collector, respectively.

According to the present invention, the current collector includes a current collector for collecting current in the cell region; And

And a conductive part connected to one side of the current collector.

According to one aspect of the invention, a plurality of openings are formed in the electrolyte membrane, the ends of the conductive portion of the cathode current collector is electrically connected in series with the ends of the conductive portion of the anode current collector adjacent through the opening.

According to the present invention, an end of the conductive portion of the cathode current collector is positioned at the end of the conductive portion of the anode current collector and the opening, and the opening may be filled with a conductive metal.

According to another aspect of the present invention, the stage of the conductive portion of the cathode current collector and the stage of the conductive portion of the anode current collector are respectively exposed to the outside of the electrolyte membrane, so that the stage of the cathode current collector and the anode current collector The ends of the conductive portions of are electrically connected in series.

According to the present invention, the current collector is formed of a first metal or a conductive polymer having an electrical conductivity of 1 S / cm or more.

The first metal may be selected from the group consisting of Ag, Au, Al, Ni, Cu, Pt, Ti, Mn, Zn, Fe, Sn, and alloys thereof.

In addition, a second metal may be coated on the first metal.

The second metal may be selected from the group consisting of Ag, Au, Al, Ni, Cu, Pt, Ti, Mn, Zn, Fe, Sn, and alloys thereof.

According to the present invention, the conductive polymer may be formed of any one selected from the group consisting of polyaniline, polypyrrole, and polythiophene.

The current collector may be formed by any one of sputtering, CVD deposition, electrical deposition, patterning, and metal etching.

According to the invention, the current collector is a metal mesh.

According to the present invention, the membrane-electrode assembly has a plurality of first openings corresponding to the cell region formed on both sides of the electrolyte membrane, and the anode current collector and the cathode current collector are respectively formed on the first opening. An anode support and a cathode support are disposed; may be further provided.

A plurality of second openings may be formed in the electrolyte membrane and the support, respectively, and ends of the conductive portion of the cathode current collector may be electrically connected in series with ends of the conductive portion of the anode current collector adjacent to each other through the second opening.

Meanwhile, an end of the conductive portion of the cathode current collector may be positioned at an end of the conductive portion of the anode current collector and the second opening, and the second opening may be filled with a conductive metal.

In addition, the stage of the conductive portion of the cathode current collector and the stage of the conductive portion of the anode current collector are respectively exposed to the outside of the electrolyte membrane so that the stage of the cathode current collector and the conductive portion of the anode current collector are electrically It can also be connected in series.

According to the invention, the support is made of a non-conductive polymer.

The support is preferably made of a material selected from the group consisting of polyimide, polyethylene, polypropylene, PVC.

According to the invention, the support and the current collector may be a flexible printed circuit board formed integrally.

According to another embodiment of the present invention, a membrane-electrode assembly includes:

An electrolyte membrane in which a plurality of cell regions are formed;

A catalyst layer formed in each of the cell regions on both sides of the electrolyte membrane;

An anode current collector and a cathode current collector respectively provided on the catalyst layer; And

And an anode diffusion unit and a cathode diffusion unit respectively provided on the anode current collector and the cathode current collector.

Hereinafter, exemplary embodiments of the monopolar membrane-electrode assembly according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic cross-sectional view of a monopolar membrane-electrode assembly according to a first embodiment of the present invention, FIG. 2 is a plan view showing an electrolyte membrane of a fuel cell of the present invention, and FIGS. 3 and 4 are each a membrane of FIG. A plan view showing the current collector inserted in the electrode assembly.

1 to 4 together, the monopolar membrane-electrode assembly 100 into which the current collector of the present invention is inserted includes a plurality of cell regions, for example, eight cell regions (first to eight cells). An electrolyte membrane 110 is provided. On each cell region of the first surface 111 of the electrolyte membrane 110, mesh-shaped anode current collectors 120 (A1 to A8) are formed. The conductive part 122 is formed on one side of the anode current collector 120. The anode electrode 130 is provided on the anode current collector 120.

Mesh-type cathode current collectors 160 (C1 to C8) are formed on each cell region of the second surface 112 of the electrolyte membrane 110. The conductive portion 162 is formed at one side of the cathode current collector 160. The cathode electrode 170 is provided on the cathode current collector 160.

The current collector and the conductive part connected to the current collector form a current collector.

FIG. 3 is a plan view of the anode current collectors A1 to A8, and FIG. 4 is a plan view of the cathode current collectors C1 to C8 together with the electrolyte membrane. The conductive parts 122 of the anode current collector A1 and the conductive parts 162 of the cathode current collector C8 are connected to terminals 124 and 164 for electrical connection to the outside, respectively. The terminals 124 and 164 preferably extend from the conductive portion 122 of the anode current collector A1 and the conductive portion 162 of the cathode current collector C8, respectively.

The end 162a of the conductive portion 162 of the cathode current collector C1 is connected to the anode current collector A2 of the second cell through an opening (110a in FIG. 2) formed in the electrolyte membrane 110. It is electrically connected to the stage 122a of 122. That is, the opening 110a is filled with the conductive metal 115. As described above, the anode current collectors A2 to A8 of each cell are electrically connected to the cathode current collectors C1 to C7 of neighboring cells through the openings 110a. Thus, the first to eighth cells are connected in series.

As the current collectors 120 and 160, the conductive parts 122 and 162, the conductive metal 115, and the terminals 124 and 164, a first metal, which is a transition metal having an electrical conductivity of 1 S / cm or more, may be used. It may be coated with a second metal to prevent corrosion on the first metal.

Ag, Au, Al, Ni, Cu, Pt, Ti, Mn, Zn, Fe, Sn and their alloys may be used as the first metal and the second metal, respectively. As the first metal substitute, a conductive polymer such as polyaniline, polypyrrole, polythiophene, or the like may be used.

The current collector may be divided into a method of directly forming a first metal and a second metal on an electrolyte membrane, and a method of separately forming a current collector and then bonding the current collector. The former method includes a sputtering method, a CVD deposition method, and an electrodeposition method. In the latter method, a metal thin film may be patterned and etched into a shape of a current collector.

The monopolar membrane-electrode assembly 100 according to the first embodiment includes an opening 110a formed in the electrolyte membrane 110 with a connection member electrically connecting the anode electrode 130 and the cathode electrode 170. Since the connection is directly through the length of the connection member is very short, thus the electrical resistance is small. In addition, since the current collectors 120 and 160 are installed between the electrolyte membrane 110, which is the reaction interface, and the catalyst layers of the electrodes 130 and 170, electrons generated in the catalyst layer are collected in the current collectors in direct contact with each other. Electrons pass through the fuel diffusion portion of the electrode and the electrode support, and there is no electrical resistance generated.

5 is a schematic cross-sectional view of a monopolar membrane-electrode assembly 200 according to a second embodiment of the present invention, and FIGS. 6 and 7 are plan views showing current collectors inserted into the membrane-electrode assembly of FIG. 5. 1 through 4, the same names are used for the same components as those in FIGS. 1 to 4, and detailed descriptions thereof will be omitted.

5 to 7 together, the monopolar membrane-electrode assembly 200 into which the current collector of the present invention is inserted includes a plurality of cell regions, for example, eight cell regions (first to eighth cells). An electrolyte membrane 210 is provided. The anode current collectors 220 (A1 to A8) having a mesh shape are formed on each cell region in the first surface 211 of the electrolyte membrane 210. The conductive part 222 is formed at one side of the anode current collector 220. The anode electrode 230 is provided on the anode current collector 220.

On the second surface 212 of the electrolyte membrane 210, mesh-shaped cathode current collectors 260 (C1 to C8) are formed on each cell region. The conductive portion 262 is formed at one side of the cathode current collector 260. The cathode electrode 270 is provided on the cathode current collector 260.

Ends 222a and 262a of the conductive portions 222 and 262 extend to the outside of the electrolyte membrane 210, respectively. Each electrode 230 and 270 may be formed of a catalyst layer, a fuel diffusion unit, and an electrode support.

6 is a plan view of the anode current collectors A1 to A8, and FIG. 7 is a plan view of the cathode current collectors C1 to C8, and is shown together with the electrolyte membrane. Terminals 224 and 164 for electrical connection to the outside are respectively connected to the conductive portion 222 of the anode current collector A1 and the conductive portion 262 of the cathode current collector C8. The terminals 224 and 164 preferably extend from the conductive portion 222 of the anode current collector A1 and the conductive portion 262 of the cathode current collector C8, respectively.

The stage 262a of the conductive portion 262 of the cathode current collector C1 and the stage 222a of the connecting member 222 of the anode current collector A2 of the second cell are electrically connected. The ends 222a and 262a may be filled with the conductive metal 215 and electrically connected to each other. As described above, the anode current collectors A2 to A8 are electrically connected to the cathode current collectors C1 to C7 of neighboring cells. Thus, the first to eighth cells are connected in series.

In the monopolar type membrane-electrode assembly 200 according to the second embodiment, a conductive portion electrically connecting the anode electrode 230 and the cathode electrode 270 may be easily connected to the outside of the electrolyte membrane. In addition, since the current collectors 220 and 260 are installed between the electrolyte membrane 210 which is the reaction interface and the catalyst layers of the electrodes 230 and 270, the electrons generated in the catalyst layer are collected in the current collectors in direct contact with each other. Electrons pass through the fuel diffusion portion of the electrode and the electrode support, and there is no electrical resistance generated.

FIG. 8 is a schematic cross-sectional view of a monopolar membrane-electrode assembly according to a third embodiment of the present invention, FIG. 9 is a plan view of the supporting body of FIG. 8, and FIGS. 10 and 11 are respectively the supports of FIG. 8. A plan view showing a current collector having a current collector, a conductive portion and a terminal formed on the top

8 to 11, the monopolar membrane-electrode assembly 300 into which the current collector of the present invention is inserted includes a plurality of cell regions, for example, eight cell (first to eight cell) regions. An electrolyte membrane 310 is provided. Both surfaces of the electrolyte membrane 310 are provided with non-conductive supports 314 and 316 such as polyimide films having a plurality of quadrilateral openings 314a and 316a corresponding to the cell regions, respectively. The supports 314 and 316 extend outward from the electrolyte membrane 310, and a plurality of openings 314b and 316b are formed in the extended region. The anode current collectors 320 (A1 to A8) and the cathode current collectors 360 (C1 to C8) are formed on each cell region in each support 314 and 316.

Each electrode 330, 370 is composed of a catalyst layer, a fuel diffusion unit, and an electrode support.

The nonconductive supports 314 and 316 may also be formed of polyethylene or polypropylene.

The anode current collector 320 (A1 to A8) and the cathode current collector 360 (C1 to C8) may have various shapes including a mesh shape. The conductive portion 322 is formed at one side of the anode current collector 320, and the conductive portion 362 is formed at one side of the cathode current collector 360. An anode electrode 330 is provided on the anode current collector 320. The cathode electrode 370 is provided on the cathode current collector 360.

FIG. 10 is a plan view of an anode current collector including anode current collectors A1 to A8, and FIG. 11 is a plan view of a cathode current collector including cathode current collectors C1 to C8.

10 and 11, a flexible printed circuit board (FPCB) in which a current collector made of a conductive metal is formed together on the polyimide films 314 and 316 is shown. In this case, the current collector is made integral with the polyimide films 314 and 316 and then bonded to the electrolyte membrane.

Terminals 324 and 364 for electrical connection to the outside are respectively connected to the conductive portion 322 connected to the anode current collector A1 and the conductive portion 362 connected to the cathode current collector C8. The terminals 324 and 364 may extend from the conductive portion 322 connected to the anode current collector A1 and the conductive portion 362 connected to the cathode current collector C8.

The stage 362a of the conductive portion 362 of the cathode current collector C1 of the first cell is located in the opening 316b formed in the support 316, and the conductive portion of the anode current collector A2 of the second cell. End 322a of 322 is located in opening 314b formed in support 314. The support 316 on which the cathode current collector 360, the conductive part 362, and the terminal 364 are formed is disposed between the cathode electrode 370 and the electrolyte membrane 310, and the anode current collector 320 is disposed. The support 314 having the conductive portion 322 and the terminal 324 is disposed between the anode electrode 330 and the electrolyte membrane 310, and then the openings 314b and 316b formed in the support 314 and 316 are aligned. After hot-pressing for 3 minutes at 125 ° and 3 ton pressure in one state, spot welders of the ends 322a and 362a of the conductive parts 322 and 262 are formed through the openings 314b and 316b. Or by ultrasonic welding (ultrasonic welder). As described above, the anode current collectors A2 to A8 of each cell are electrically connected to the cathode current collectors C1 to C7 of neighboring cells through the openings 314b and 316b. Thus, the first to eighth cells are connected in series.

As the current collectors 320 and 260, the conductive parts 322 and 362, and the terminals 324 and 364, a first metal which is a transition metal having an electrical conductivity of 1 S / cm or more may be used. It may be coated with a second metal to prevent corrosion on the first metal.

Ag, Au, Al, Ni, Cu, Pt, Ti, Mn, Zn, Fe, Sn and their alloys may be used as the first metal and the second metal, respectively. As the first metal substitute, a conductive polymer such as polyaniline, polypyrrole, polythiophene, or the like may be used.

In the fuel cell 300 according to the third embodiment, an opening 314b having conductive parts 322 and 362 formed between the support parts 314 and 316 connecting the anode current collector 320 and the cathode current collector 360 is formed. 316b is directly connected, so the lengths of the conductive parts 322 and 262 are very short, and thus the electrical resistance is low. In addition, since the current collectors 320 and 360 are installed between the electrolyte membrane 310 and the catalyst layer, there is no electrical resistance generated when electrons generated in the catalyst layer pass through the fuel diffusion part of the electrode and the electrode support.

12 is a schematic exploded perspective view of a monopolar unit cell membrane-electrode assembly 400 according to a fourth embodiment of the present invention. Referring to FIG. 12, a membrane-electrode assembly 400 having an anode current collector 420 and a cathode current collector 460 inserted between the catalyst layer 412 and the fuel diffusion / electrode supports 430 and 470 is schematically illustrated. It is shown. The catalyst layer 412 is first formed on both surfaces of the electrolyte membrane 410 by a decal method, a screen printing method, or a direct coating, and then the current collectors 420 and 460 and the fuel are formed thereon. The diffusion parts / electrode supports 430 and 470 are formed and hot pressed to complete an electrolyte membrane-electrode assembly incorporating a current collector.

An electrolyte membrane-electrode assembly having a plurality of electrodes formed on one electrolyte membrane 410 may be manufactured through the same process. Membrane in which a plurality of electrodes are connected in series by hot pressing a current collector having an electrically connected series structure, a plurality of fuel diffusion units, and an electrode support on a CCM (Catalyst Coated Membrane) having a plurality of catalyst layers formed on both sides of the electrolyte membrane. Complete the electrode assembly.

13 is a view illustrating the performance of a fuel cell unit cell having a current collector inserted between an electrolyte membrane and a catalyst layer according to an embodiment of the present invention, and a unit cell using a Ni-mesh current collector on the outside of an electrode according to the related art. It is a comparison of performance. At the output voltage of 0.3 V, the current density value was 37 mA / cm2 using Ni-mesh, but improved by about 13% to 42 mA / cm2 when the current collector was inserted between the electrolyte membrane and the catalyst layer. In other words, the current collection in the catalyst layer where electrons are generated shows better performance because the electrical resistance is smaller than the current collection outside the electrode.

FIG. 14 shows the performance of a unit cell of a fuel cell in which a current collector is inserted between a catalyst layer and a fuel diffusion unit manufactured according to an embodiment of the present invention.

The single electrode of the direct methanol fuel cell has an open circuit voltage of 1V or less and an actual operating voltage of 0.3 ~ 0.5V. Therefore, a high voltage can be obtained by connecting several unit cells in series.

According to the present invention, a 12-cell membrane-electrode assembly in which 12 electrodes having an area of 2.2 cm * 1.1 cm are connected in series on one electrolyte membrane is fabricated. After inserting FPCB having a current collector having a structure for connecting 12 cells in series between a catalyst coated membrane having 12 catalyst layers and a fuel diffusion part corresponding to each catalyst layer, hot at 140 oC and 3 metric ton conditions Pressing to complete the 12 cell membrane-electrode assembly. The results of measuring the performance of the membrane-electrode assembly in which 12 cells are connected in series are shown in FIG. 15, and the power density over time is shown in FIG. 16.

Referring to FIG. 15, an output of 528 mW was obtained with a performance of 145.2 mA (60 mA / cm 2) at an output voltage of 3.6 V (0.3 V per cell). Maximum power was 544 mW at 3.35 V to 162.5 mA (67 mA / cm 2). When the plurality of cells are connected in series to obtain a high operating voltage, the electrical resistance increases and the cell connection failure rate increases, but the current collector according to the present invention has the advantage of reducing the resistance and increasing the yield.

Referring to FIG. 16, the power density of the fuel cell according to the present invention was found to be good at a level of 40 mW / cm 2.

The monopolar membrane-electrode assembly according to the present invention has a short conductive length between the current collectors, and is installed in direct contact with the catalyst layer in which electrons are generated, thereby lowering resistance and increasing battery efficiency. In addition, since the current collector is not installed between the fuel and the electrode, the fuel is smoothly communicated. In the conventional mesh structure, the liquid fuel leaks through the mesh, but the current collector is a membrane in the liquid fuel cell of the present invention. Since there exists a thin film between and an electrode, fuel leak is hardly generated.

Although the present invention has been described with reference to the embodiments with reference to the drawings, this is merely exemplary, it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined only by the appended claims.

Claims (52)

An electrolyte membrane in which a plurality of cell regions are formed; An anode current collector and a cathode current collector respectively installed in the cell region on both sides of the electrolyte membrane; And an anode electrode and a cathode electrode provided on the anode current collector and the cathode current collector, respectively. The method of claim 1, The current collector includes a current collector for collecting current in the cell region; And And a conductive portion connected to one side of the current collector. The method of claim 2, A plurality of openings are formed in the electrolyte membrane, and a terminal of the conductive portion of the cathode current collector is electrically connected in series with the ends of the conductive portion of the anode current collector adjacent through the opening. assembly. The method of claim 3, wherein And an end of the conductive portion of the cathode current collector is positioned at the end of the anode current collector and the opening, the opening being filled with a conductive metal. The method of claim 2, The ends of the conductive portion of the cathode current collector and the ends of the anode current collector are respectively exposed to the outside of the electrolyte membrane so that the ends of the conductive portion of the cathode current collector and the conductive portion of the anode current collector are electrically connected. Monopolar membrane-electrode assembly, characterized in that connected in series. The method of claim 2, The current collector is a monopolar membrane-electrode assembly, characterized in that formed of a first metal or a conductive polymer having an electrical conductivity of 1 S / cm or more. The method of claim 6, The first metal is selected from the group consisting of Ag, Au, Al, Ni, Cu, Pt, Ti, Mn, Zn, Fe, Sn and alloys thereof. The method of claim 6, The monopolar film-electrode assembly, characterized in that the second metal is coated on the first metal. The method of claim 8, The second metal is selected from the group consisting of Ag, Au, Al, Ni, Cu, Pt, Ti, Mn, Zn, Fe, Sn and alloys thereof. The method of claim 7, wherein The conductive polymer is any one selected from the group consisting of polyaniline, polypyrrole, polythiophene, and monopolar membrane-electrode assembly. The method of claim 1, The current collector is a monopolar film-electrode assembly, characterized in that formed by any one of sputtering method, CVD deposition method, electrical deposition method, patterning process, metal etching. The method of claim 2, The current collector is a mono-polar film-electrode assembly, characterized in that the metal mesh. The method of claim 1, A plurality of first openings corresponding to the cell region are formed on both surfaces of the electrolyte membrane, and the anode support and the cathode support are respectively disposed on the first opening with the anode current collector and the cathode current collector; Monopolar membrane-electrode assembly, characterized in that. The method of claim 13, A plurality of second openings are formed in the electrolyte membrane and the support, respectively, and ends of the conductive portion of the cathode current collector are electrically connected in series with ends of the conductive portion of the anode current collector adjacent to each other through the second opening. Monopolar membrane-electrode assembly. The method of claim 14, And an end of the cathode of the cathode current collector is positioned at an end of the anode current collector and the second opening, and the second opening is filled with a conductive metal. The method of claim 13, The ends of the conductive portion of the cathode current collector and the ends of the anode current collector are respectively exposed to the outside of the electrolyte membrane so that the ends of the conductive portion of the cathode current collector and the conductive portion of the anode current collector are electrically connected. Monopolar membrane-electrode assembly, characterized in that connected in series. The method of claim 13, The current collector is a monopolar membrane-electrode assembly, characterized in that formed of a first metal or a conductive polymer having an electrical conductivity of 1 S / cm or more. The method of claim 17, The first metal is selected from the group consisting of Ag, Au, Al, Ni, Cu, Pt, Ti, Mn, Zn, Fe, Sn and alloys thereof. The method of claim 17, The monopolar film-electrode assembly, characterized in that the second metal is coated on the first metal. The method of claim 19, The second metal is selected from the group consisting of Ag, Au, Al, Ni, Cu, Pt, Ti, Mn, Zn, Fe, Sn and their alloys. The method of claim 17, The conductive polymer is any one selected from the group consisting of polyaniline, polypyrrole, polythiophene, and monopolar membrane-electrode assembly. The method of claim 13, The support is a monopolar membrane-electrode assembly, characterized in that made of a non-conductive polymer. The method of claim 22, Wherein said support is made of a material selected from the group consisting of polyimide, polyethylene, polypropylene, and polyvinyl chloride. The method of claim 22, The support and the current collector is a monopolar film-electrode assembly, characterized in that the flexible printed circuit board formed integrally. The method of claim 13, The current collector is a monopolar film-electrode assembly, characterized in that formed by any one of sputtering method, CVD deposition method, electrical deposition method, patterning process, metal etching. 26. A fuel cell comprising the monopolar membrane-electrode assembly of claims 1-25. An electrolyte membrane in which a plurality of cell regions are formed; A catalyst layer formed in each of the cell regions on both sides of the electrolyte membrane; An anode current collector and a cathode current collector respectively provided on the catalyst layer; And And an anode diffuser and a cathode diffuser respectively disposed on the anode current collector and the cathode current collector, respectively. The method of claim 27, The current collector includes a current collector for collecting current in the cell region; And And a conductive portion connected to one side of the current collector. The method of claim 28, A plurality of openings are formed in the electrolyte membrane, and a terminal of the conductive portion of the cathode current collector is electrically connected in series with the ends of the conductive portion of the anode current collector adjacent through the opening. assembly. The method of claim 29, And an end of the conductive portion of the cathode current collector is positioned at the end of the anode current collector and the opening, the opening being filled with a conductive metal. The method of claim 28, The ends of the conductive portion of the cathode current collector and the ends of the anode current collector are respectively exposed to the outside of the electrolyte membrane so that the ends of the conductive portion of the cathode current collector and the conductive portion of the anode current collector are electrically connected. Monopolar membrane-electrode assembly, characterized in that connected in series. The method of claim 28, The current collector is a monopolar film-electrode assembly, characterized in that formed of a first metal or conductive polymer having an electrical conductivity of 1 S / cm or more. The method of claim 32, The first metal is selected from the group consisting of Ag, Au, Al, Ni, Cu, Pt, Ti, Mn, Zn, Fe, Sn and alloys thereof. The method of claim 32, The monopolar film-electrode assembly, characterized in that the second metal is coated on the first metal. The method of claim 34, wherein The second metal is selected from the group consisting of Ag, Au, Al, Ni, Cu, Pt, Ti, Mn, Zn, Fe, Sn and alloys thereof. The method of claim 32, The conductive polymer is any one selected from the group consisting of polyaniline, polypyrrole, polythiophene, and monopolar membrane-electrode assembly. The method of claim 27, The current collector is a monopolar film-electrode assembly, characterized in that formed by any one of sputtering method, CVD deposition method, electrical deposition method, patterning process, metal etching. The method of claim 28, The current collector is a monopolar membrane-electrode assembly, characterized in that the metal mesh. The method of claim 27, A plurality of first openings corresponding to the cell region are formed on both surfaces of the electrolyte membrane, and the anode support and the cathode support are respectively disposed on the first opening with the anode current collector and the cathode current collector; Monopolar membrane-electrode assembly, characterized in that. The method of claim 39, A plurality of second openings are formed in the electrolyte membrane and the support, respectively, and ends of the conductive portion of the cathode current collector are electrically connected in series with ends of the conductive portion of the anode current collector adjacent to each other through the second opening. Monopolar membrane-electrode assembly. The method of claim 40, And an end of the cathode of the cathode current collector is positioned at an end of the anode current collector and the second opening, and the second opening is filled with a conductive metal. The method of claim 39, The stage of the conductive portion of the cathode current collector and the stage of the conductive portion of the anode current collector are respectively exposed to the outside of the electrolyte membrane so that the stage of the cathode current collector and the stage of the conductive portion of the anode current collector are electrically connected in series. Monopolar membrane-electrode assembly, characterized in that connected. The method of claim 39, The current collector is a monopolar membrane-electrode assembly, characterized in that formed of a first metal or a conductive polymer having an electrical conductivity of 1 S / cm or more. The method of claim 43, Wherein the first metal is selected from the group consisting of Ag, Au, Al, Ni, Cu, Pt, Ti, Mn, Zn, Fe, Sn and alloys thereof. The method of claim 43, The monopolar film-electrode assembly, characterized in that the second metal is coated on the first metal. The method of claim 45, The second metal is selected from the group consisting of Ag, Au, Al, Ni, Cu, Pt, Ti, Mn, Zn, Fe, Sn and alloys thereof. The method of claim 43, The conductive polymer is any one selected from the group consisting of polyaniline, polypyrrole, polythiophene, and monopolar membrane-electrode assembly. The method of claim 39, The support is a monopolar membrane-electrode assembly, characterized in that made of a non-conductive polymer. The method of claim 49, Wherein said support is made of a material selected from the group consisting of polyimide, polyethylene, polypropylene, and polyvinyl chloride. The method of claim 49, The support and the current collector is a monopolar film-electrode assembly, characterized in that the flexible printed circuit board formed integrally. The method of claim 39, The current collector is a monopolar film-electrode assembly, characterized in that formed by any one of sputtering method, CVD deposition method, electrical deposition method, patterning process, metal etching. 52. A fuel cell comprising the monopolar membrane-electrode assembly of claims 27-51.

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