KR100773529B1 - Monopolar membrane-electrode assembly - Google Patents

Abstract

A monopolar membrane electrode assembly is provided to lower resistance, thereby increasing battery efficiency, to prevent the leakage of liquid fuel and to improve the circulation of fuel. A monopolar membrane electrode assembly(100) comprises an electrolyte membrane(110) having a plurality of cell regions; an anode support and a cathode support where a plurality of first aperture parts corresponding to the cell regions and a plurality of second aperture parts related with the cell regions are formed at the both surfaces of the electrolyte membrane; a plurality of anode current collectors(120) and a plurality of cathode current collectors(160) which are installed at the cell regions, respectively on the supports; a plurality of anodes(130) and a plurality of cathodes which are installed on the anode current collectors and the cathode current collectors, respectively; a current collection part which collects the current of the cell regions; and a conducting part which is connected with the one side of the current collection part, wherein the conducting part is coated with a conductive material(126,166), and the terminal(162a) of the conducting part of the cathode current collectors is electrically connected in serial with the terminal(122a) of the conducting part of the anode current collectors.

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 the electrolyte membrane 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 cross-sectional view of a monopolar unit cell membrane-electrode assembly 400 according to a fourth embodiment of the present invention.

FIG. 13 is a plan view of the supporting body of FIG. 12. FIG.

14 and 15 are plan views illustrating current collectors inserted into the membrane electrode assembly of FIG. 12, respectively.

16 is a graph illustrating the performance of a fuel cell unit cell having a current collector inserted between an electrolyte membrane and a catalyst layer according to the first embodiment of the present invention.

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 greatly 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. In addition, in order for the current generated in the catalyst layer to be transferred to the current collector, there were limitations in material selection by using a material in which both the diffusion layer and the support layer were electrically conductive, and this limitation was directly related to the performance limitation of the fuel cell.

An object of the present invention is to form a current collector on the catalyst layer of the electrode to minimize the resistance by shortening the moving distance of the electrons, and to form a coating layer having electrical conductivity on the current collector to directly contact the current collector with the catalyst layer. It is to provide a structure of the membrane-electrode assembly for preventing the increase of adhesion and corrosion of the current collector by.

Another object of the present invention is to provide a fuel cell comprising the membrane-electrode assembly.

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 support and a cathode support each having a plurality of first openings corresponding to the cell region and a plurality of second openings associated with the cell region on both sides of the electrolyte membrane;

A plurality of anode current collectors and a plurality of cathode current collectors respectively provided in the cell region on the support; And

And a plurality of anode electrodes and a plurality of cathode electrodes respectively provided on the anode current collector and the cathode current collector.

Each of the current collectors includes a current collector for collecting current in the cell region; And

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

The current collector is coated with a conductive material,

The stage of the conductive portion of the cathode current collector is electrically connected in series with the stage of the conductive portion of the anode current collector adjacent through the second opening.

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

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

An anode support and a cathode support each having a plurality of first openings corresponding to the cell region on both sides of the electrolyte membrane;

A plurality of anode current collectors and a plurality of cathode current collectors respectively provided in the cell region on the support; And

And a plurality of anode electrodes and a plurality of cathode electrodes respectively provided on the anode current collector and the cathode current collector.

Each of the current collectors includes a current collector for collecting current in the cell region; And

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

The current collector is coated with a conductive material,

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 support, so that the stage of the conductive portion of the cathode current collector and the conductive portion of the anode current collector are electrically It is characterized in that the serial connection.

According to the present invention, the conductive material may be formed of a carbon-based material or a conductive polymer.

In addition, the conductive material preferably has a thickness of 20 μm to 60 μm.

According to the invention, the support is made of a material selected from the group consisting of polyimide, polyethylene, polypropylene, polyvinylchloride.

The support and the current collector may be a flexible printed circuit board (FPCB) formed integrally.

The current collector may be formed of a metal having an electrical conductivity of 1 S / cm or more.

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

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 support and a cathode support having a plurality of first openings corresponding to the cell region and a plurality of second openings associated with the cell region formed on the catalyst layer;

A plurality of anode current collectors and a plurality of cathode current collectors respectively provided in the cell region on the support; And

And a plurality of anode diffusion parts and a plurality of cathode diffusion parts respectively provided on the anode current collector and the cathode current collector.

Each of the current collectors includes a current collector for collecting current in the cell region; And

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

The current collector is coated with a conductive material,

The stage of the conductive portion of the cathode current collector is electrically connected in series with the stage of the conductive portion of the anode current collector adjacent through the second opening.

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

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 support and a cathode support formed with a plurality of first openings corresponding to the cell region on the catalyst layer;

A plurality of anode current collectors and a plurality of cathode current collectors respectively provided in the cell region on the support; And

And a plurality of anode diffusion parts and a plurality of cathode diffusion parts respectively provided on the anode current collector and the cathode current collector.

Each of the current collectors includes a current collector for collecting current in the cell region; And

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

The current collector is coated with a conductive material,

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 support, so that the stage of the conductive portion of the cathode current collector and the conductive portion of the anode current collector are electrically It is characterized in that the serial connection.

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 membranes of FIG. A plan view showing the current collector inserted in the electrode assembly.

1 to 4, the monopolar membrane-electrode assembly 100 into which the current collecting body of the present invention is inserted has a plurality of cell regions, for example, eight cell regions (first to eighth). And an electrolyte membrane 110 in which the cells are formed. 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. A conductive portion 122 is formed on one side of each anode current collector 120. The anode current collector 120 and the conductive part 122 connected to the anode current collector 120 form an anode current collector.

The surface of the anode current collector is formed by coating a conductive material 126. The anode electrode 130 is provided on the conductive material 126.

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 current collector 160 and the conductive portion 162 connected to the current collector 160 form a cathode current collector.

The surface of the cathode current collector is formed by coating a conductive material 166. The cathode electrode 170 is provided on the conductive material 166.

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. For convenience, the conductive material is not shown. 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 stage 162a of the conductive portion 162 of the cathode current collector C1 is connected to the conductive portion of the anode current collector A2 of the second cell through an opening (110a in FIG. 2) formed in the electrolyte membrane 110. And electrically connected to 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.

The conductive materials 126 and 166 are formed of a carbon-based material or a conductive polymer. Examples of the carbon-based material include carbon powder, graphite, carbon black, acetylene black, activated carbon, carbon nanotubes, carbon nanofibers, carbon nanowires, carbon nanohorns, carbon nanorings, and fullerenes (C60). At least one selected from the group consisting of may be used.

The conductive polymer may be any one selected from the group consisting of polyaniline, polypyrrole, and polythiophene.

Preferably, the conductive materials 126 and 166 have a thickness of 20 μm to 60 μm. When the thickness of the conductive materials 126 and 166 is thinner than 20 μm, the protection effect of the current collectors 120 and 160 may be reduced, and when the thickness of the conductive materials 126 and 166 is greater than 60 μm, current collection efficiency may be reduced.

The current collectors 120 and 160, the conductive parts 122 and 162, the conductive metal 115, and the terminals 124 and 164 may use transition metals having an electrical conductivity of 1 S / cm or more.

Ag, Au, Al, Ni, Cu, Pt, Ti, Mn, Zn, Fe, Sn and alloys thereof may be used as the metal, and polyaniline, polypyrrole, poly Conductive polymers such as thiophene (polythiophene) can be used.

The method of forming the conductive material and the current collector may be divided into a method of directly forming a conductive material and a metal on the electrolyte membrane and a method of forming the conductive material on the current collector and then joining the electrolyte membrane. The thin film may be formed by a sputtering method, a CVD deposition method, or an electrodeposition. If necessary, the thin film may be formed by patterning and etching the metal into a shape of a current collector and a conductive material.

The monopolar membrane-electrode assembly 100 according to the first embodiment includes a conductive portion electrically connecting the anode electrode 130 and the cathode electrode 170 through an opening 110a formed in the electrolyte membrane 110. Because of the direct connection, the length of the conductive section is very short, so that 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.

In addition, the conductive materials 126 and 166 may prevent corrosion of the current collectors 120 and 160. In addition, since the current collectors 120 and 160 are coated with the conductive materials 126 and 166, the interface resistance between the catalyst layer and the current collector may be reduced, and the adhesion between the current collector and the catalyst layer (or the diffusion layer) may be increased.

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 eight 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. A conductive portion 222 is formed at one side of each anode current collector 220. The anode current collector 220 and the conductive portion 222 connected to the anode current collector 220 form an anode current collector.

A conductive material 226 is coated and formed on the anode current collector 220, and an anode electrode 230 is provided on the conductive material 226.

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 connection portion 262 connected to the cathode current collector 260 and the cathode current collector 260 forms a cathode current collector.

A conductive material 266 is formed on the cathode current collector 260, and a cathode electrode 270 is provided on the conductive material 266.

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.

FIG. 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. For convenience, the conductive material is not shown. The conductive parts 222 of the anode current collector A1 and the conductive parts 262 of the cathode current collector C8 are connected to terminals 224 and 264 for electrical connection to the outside, respectively. The terminals 224 and 264 preferably extend from the conductive portion 222 of the anode current collector A1 and the conductive portion 262 of the entire cathode current collection C8, respectively.

The stage 262a of the conductive portion 262 of the cathode current collector C1 of the first cell and the stage 222a of the conductive portion 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.

Since the conductive material, the material of the current collector, and the like of the second embodiment are substantially the same as the conductive material, the current collector of the first embodiment, detailed description thereof will be omitted.

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. In addition, the conductive materials 226 and 266 may prevent corrosion of the current collectors 220 and 260.

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 an electrolyte in which a plurality of cell regions, for example, eight cell (first to eight cell) regions are formed. Film 310. 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. Conductive materials 326 and 366 are formed on the anode current collector 320 and the cathode current collector 360, respectively, and anode electrodes 330 and cathode electrodes 370 are provided on the conductive materials 326 and 366.

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, polypropylene, and polyvinyl chloride.

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. Each current collector includes a current collector and a corresponding conductive portion.

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 can be made integral with the polyimide films 314 and 316, and then joined with 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 being hot-pressed for 3 minutes at 125 ° C. and 3 ton pressure in a state, spot welders are formed through the openings 314b and 316b of the ends 322a and 362a of the conductive parts 322 and 262. 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.

Since the conductive material and the current collector of the third embodiment are substantially the same as the conductive material and the current collector of the first embodiment, detailed descriptions thereof will be omitted.

In addition, as in the electrode-membrane assembly of the second embodiment, the openings 314b and 316b are not formed in the electrolyte membrane 310, and the conductive portions 322 and 326 extend out of the electrolyte membrane 310.

In the monopolar membrane-electrode assembly 300 according to the third embodiment, conductive parts 322 and 362 connecting between the anode current collector 320 and the cathode current collector 360 are provided on the supports 314 and 316. Since the direct connection is made through the formed openings 314b and 316b, 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. In addition, the conductive materials 326 and 366 may prevent corrosion of the current collectors 320 and 360.

12 is a schematic separated cross-sectional view of a monopolar unit cell membrane-electrode assembly 400 according to a fourth embodiment of the present invention, and FIG. 13 is a plan view of the supporting body of FIG. 14 and 15 are plan views showing current collectors inserted into the membrane-electrode assembly of FIG. 12, respectively.

12 to 15, the monopolar membrane-electrode assembly 400 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 410 is provided. On both surfaces of the electrolyte membrane 410, a plurality of catalyst layers 411 and 412 corresponding to the cell regions are formed, respectively. On the catalyst layers 411 and 412, non-conductive supports 414 and 216, for example, polyimide films, on which the plurality of first openings 414a and 216a are formed, are provided.

The anode current collectors 420 (A1 to A8) and the cathode current collectors 460 (C1 to C8) are formed on each cell region in each support 414 and 416. An anode diffuser 430 and a cathode diffuser 470 are provided on the anode collector 420 and the cathode collector 460.

The nonconductive supports 414 and 416 may also be formed of polyethylene, polypropylene, and polyvinyl chloride.

The anode current collectors 420 (A1 to A8) and the cathode current collectors 460 (C1 to C8) may be a metal mesh in the form of a lattice. A conductive portion 422 is formed at one side of the anode current collector 420, and a stage of the conductive portion 422 extends to be exposed to the outside of the support 414. The conductive portion 462 is formed at one side of the cathode current collector 460, and the end of the conductive portion 462 extends to be exposed to the outside of the support 416. Each current collector includes a current collector and a corresponding conductive portion.

Conductive materials 426 and 466 are coated on surfaces of the anode current collector 420 and the cathode current collector 460.

Since the conductive materials 426 and 466 are substantially the same as the conductive materials 126 and 166 of the first embodiment, detailed description thereof will be omitted.

4 and 15 show a flexible printed circuit board (FPCB) in which a current collector made of a conductive metal is formed together on a polyimide film as the supports 414 and 416. In this case, the anode current collector and the cathode current collector may be manufactured integrally with the polyimide films 414 and 416, respectively, and the conductive material may be coated on the current collector and then bonded to the electrolyte membrane 410.

The conductive portion 422 connected to the anode current collector A1 and the conductive portion 462 connected to the cathode current collector C8 are connected to terminals 424 and 464 for electrical connection to the outside, respectively. The terminals 424 and 464 preferably extend from the conductive portion 422 connected to the anode current collector A1 and the conductive portion 462 connected to the cathode current collector C8.

The stage 462a of the conductive portion 462 of the cathode current collector portion C1 of the first cell extends outside the support 416, and the conductive portion 422 of the anode current collector portion A2 of the second cell may extend. The end 422a extends outside the support 414. The support 416 on which the cathode current collector 460, the conductive part 462, and the terminal 464 are formed is disposed between the cathode electrode 470 and the electrolyte membrane 410, and the anode current collector 420. The support 414 on which the conductive portion 422 and the terminal 424 are formed is disposed between the anode electrode 430 and the electrolyte membrane 410, and then hot-pressed at 125 ° C. and 3 ton pressure for 3 minutes. Next, the ends 422a and 262a of the conductive parts 422 and 262 are electrically connected to each other by a spot welder or an 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 the neighboring cells. Thus, the first to eighth cells are connected in series.

In the membrane-electrode assembly of the fourth embodiment, the current collectors are connected to the outside of the support, but are not necessarily limited thereto. That is, as in the third embodiment, the second openings 314b and 316b of FIG. 9 are formed in the support, and the connection of the current collectors can also be made through the second openings.

16 is a graph illustrating the performance of a fuel cell unit cell having a current collector inserted between an electrolyte membrane and a catalyst layer according to the first embodiment of the present invention. 3M methanol was supplied to the anode electrode, and air was supplied to the cathode electrode. It can be seen that the output power is good even after the use time has elapsed.

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. In addition, the conductive material of the present invention improves adhesion between the current collector and another layer, and prevents the current collector from being corroded by the catalyst layer, so that the conductive material can be used for a long time.

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 (14)

An electrolyte membrane in which a plurality of cell regions are formed; An anode support and a cathode support each having a plurality of first openings corresponding to the cell region and a plurality of second openings associated with the cell region on both sides of the electrolyte membrane; A plurality of anode current collectors and a plurality of cathode current collectors respectively provided in the cell region on the support; And a plurality of anode electrodes and a plurality of cathode electrodes respectively provided on the anode current collector and the cathode current collector. Each of the current collectors includes a current collector for collecting current in the cell region; And And a conductive part connected to one side of the current collector, The current collector is coated with a conductive material, And a stage of the conductive portion of the cathode current collector is electrically connected in series with a stage of the conductive portion of the anode current collector adjacent through the second opening. An electrolyte membrane in which a plurality of cell regions are formed; An anode support and a cathode support each having a plurality of first openings corresponding to the cell region on both sides of the electrolyte membrane; A plurality of anode current collectors and a plurality of cathode current collectors respectively provided in the cell region on the support; And a plurality of anode electrodes and a plurality of cathode electrodes respectively provided on the anode current collector and the cathode current collector. Each of the current collectors includes a current collector for collecting current in the cell region; And And a conductive part connected to one side of the current collector, The current collector is coated with a conductive material, 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 support, so that the stage of the conductive portion of the cathode current collector and the conductive portion of the anode current collector are electrically Monopolar membrane-electrode assembly, characterized in that connected in series. The method according to claim 1 or 2, The conductive material is a membrane-electrode assembly, characterized in that formed of a carbon-based material or a conductive polymer. The method according to claim 1 or 2, Membrane electrode assembly, characterized in that the thickness of the conductive material is 20 μm to 60 μm. The method according to claim 1 or 2, Wherein said support is made of a material selected from the group consisting of polyimide, polyethylene, polypropylene, and polyvinyl chloride. The method of claim 5, The support and the current collector is a monopolar film-electrode assembly, characterized in that the flexible printed circuit board (FPCB) formed integrally. The method according to claim 1 or 2, The current collector is a monopolar film-electrode assembly, characterized in that formed of a metal having an electrical conductivity of 1 S / cm or more. 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 support and a cathode support having a plurality of first openings corresponding to the cell region and a plurality of second openings associated with the cell region formed on the catalyst layer; A plurality of anode current collectors and a plurality of cathode current collectors respectively provided in the cell region on the support; And a plurality of anode diffusion parts and a plurality of cathode diffusion parts respectively provided on the anode current collector and the cathode current collector. Each of the current collectors includes a current collector for collecting current in the cell region; And And a conductive part connected to one side of the current collector, The current collector is coated with a conductive material, And a stage of the conductive portion of the cathode current collector is electrically connected in series with a stage of the conductive portion of the anode current collector adjacent through the second opening. 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 support and a cathode support formed with a plurality of first openings corresponding to the cell region on the catalyst layer; A plurality of anode current collectors and a plurality of cathode current collectors respectively provided in the cell region on the support; And a plurality of anode diffusion parts and a plurality of cathode diffusion parts respectively provided on the anode current collector and the cathode current collector. Each of the current collectors includes a current collector for collecting current in the cell region; And And a conductive part connected to one side of the current collector, The current collector is coated with a conductive material, 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 support, so that the stage of the conductive portion of the cathode current collector and the conductive portion of the anode current collector are electrically Monopolar membrane-electrode assembly, characterized in that connected in series. The method according to claim 8 or 9, The conductive material is a membrane-electrode assembly, characterized in that formed of a carbon-based material or a conductive polymer. The method according to claim 8 or 9, Membrane electrode assembly, characterized in that the thickness of the conductive material is 20 μm to 60 μm. The method according to claim 8 or 9, Wherein said support is made of a material selected from the group consisting of polyimide, polyethylene, polypropylene, and polyvinyl chloride. The method of claim 12, The support and the current collector is a monopolar film-electrode assembly, characterized in that the flexible printed circuit board (FPCB) formed integrally. The method according to claim 8 or 9, The current collector is a monopolar film-electrode assembly, characterized in that formed of a metal having an electrical conductivity of 1 S / cm or more.

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