CN2852407Y - Membrane electrode frame structure of proton exchange membrane fuel cell - Google Patents
Membrane electrode frame structure of proton exchange membrane fuel cell Download PDFInfo
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- CN2852407Y CN2852407Y CNU2005200465880U CN200520046588U CN2852407Y CN 2852407 Y CN2852407 Y CN 2852407Y CN U2005200465880 U CNU2005200465880 U CN U2005200465880U CN 200520046588 U CN200520046588 U CN 200520046588U CN 2852407 Y CN2852407 Y CN 2852407Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model provides a membrane electrode frame structure of a proton exchange membrane fuel cell, which comprises an exchange membrane, diffusion layer backing material and sealing material, wherein the exchange membrane slightly extend outward along the edge of the diffusion layer backing material, the backing material and the extension part of the exchange membrane are glued with a sealing tape, a temperature-proof plastic film with high strength is filled in the middle of the extension part, both sides of the plastic film are orderly attached by a resin rubber film and a temperature-proof plastic film, the thickness of the temperature-proof plastic film of a middle layer is similar to that of the proton exchange membrane, the temperature-proof plastic film is butted with the end part of the extended proton exchange membrane so as to ensure the close contact between a film electrode and a current-guiding pole plate and the effective sealing of a battery pile, and the thickness of the frame can be adjusted as required. The utility model has the advantages of good tightness, simple manufacturing process, convenient operation, low cost, capability of achieving mass production, etc.
Description
Technical Field
The utility model relates to a fuel cell, especially proton exchange membrane fuel cell's membrane electrode frame seal structure.
Background
Currently, a proton exchange membrane fuel cell is known as a power generation device capable of directly converting chemical energy stored in a hydrogen fuel and an oxidant into electric energy and reaction products. Among them, Proton Exchange Membrane Fuel Cells (PEMFC) use perfluorinated sulfonic acid solid polymer as electrolyte, so its inner core component is Membrane Electrode (MEA), which is composed of a Proton Exchange Membrane and two porous, air permeable, conductive diffusion layer materials sandwiched between two sides of the Membrane, such as carbon paper and carbon cloth. The membrane and the carbon paper (carbon cloth) contain uniform and fine dispersed electro-catalyst for initiating electrochemical reaction, such as metal platinum catalyst. The electrons released in the electrochemical reaction process can be led out by the flow guide polar plates at two sides of the membrane electrode to form a current loop.
In a typical PEMFC, a Membrane Electrode (MEA) is sandwiched between two conductive anode and cathode current-conducting plates to form a single cell, and several single cells are connected in series to form a stack having a certain output voltage and power. The diversion pore and the diversion trench of the diversion polar plate respectively guide the fuel and the oxidant into the anode region and the cathode region at two sides of the membrane electrode. At the anode end of the membrane electrode, fuel gas, such as hydrogen, can reach the anode catalyst layer through a porous diffusion material (such as carbon paper), lose electrons under the catalytic action of a catalyst, convert the electrons into protons and migrate to the cathode end through a proton exchange membrane under the action of electric field force, and meanwhile, the electrons are led out by an external circuit to do work; at the cathode end of the membrane electrode, an oxidizing medium, such as oxygen, passes through a porous diffusion material (such as carbon paper), reaches a cathode catalytic zone, and then is combined with protons transferred from the anode under the action of a cathode electrocatalyst to generate water which is discharged along with cathode tail gas, thereby completing the power generation process of the cell. When hydrogen and oxygen are used as fuel and reducing agent, the cell reaction is as follows:
and (3) anode reaction:
and (3) cathode reaction:
and (3) battery reaction:
the proton exchange membrane fuel cell can be used as an electric power system of vehicles, ships, novel space aircrafts and the like, and can also be used as a portable, movable and fixed power generation device. The sealing technique is critical to ensure that the fuel and oxidant gases in the pem fuel cell are uniformly distributed over the entire membrane electrode surfaces without mixing and directly reacting chemically. If the sealing is not good, leakage of the fuel gas and the oxidant gas to each other or to the outside of the fuel cell may occur, which may not only reduce the efficiency of the cell, but also may even cause explosion, causing damage to electric equipment and personnel. The rationality of the membrane electrode and its frame structure preparation process determines the sealing effect of the PEMFC. At present, there are the following 3 methods for preparing membrane electrodes and their frames:
method 1: the area of the proton exchange membrane adopted in the preparation of the original membrane electrode is far larger than that of a porous supporting material in the membrane electrode, such as the area of carbon paper, the membrane exceeding the area of the carbon paper is not an active area of electrochemical reaction, and two sides of the membrane of the electrochemical active area are respectively pressed together by two pieces of carbon paper carrying catalysts. After the membrane electrode is placed between two flow guide polar plates, the membrane with the electrochemical activity greater than that of the membrane is directly used as a sealing component to prevent the mutual leakage of cathode and anode gases and prevent the short circuit caused by the direct contact of two adjacent flow guide polar plates. Fig. 1 is a schematic structural diagram of a membrane electrode prepared by the method 1, which comprises the following steps: an air inlet 1, a cooling water inlet 2, a hydrogen gas inlet 3, a proton exchange membrane 4, and an activation portion 5 coated with a catalyst.
The 2 nd method: the sealing device adopted by european patent EPO604683AI is shown in fig. 2, and comprises an air inlet 1, a sealing ring 6, and a support material 7 (such as carbon paper), and is characterized in that two porous support materials 7 on two sides of a membrane electrode, such as two pieces of carbon paper, greatly extend out of the active area of the membrane electrode, a sealing material 6 is embedded in the support material and pressed on a proton exchange membrane, the thickness of the sealing material is larger than that of the membrane electrode, and the sealing material is clamped between current collecting plates, and the current collecting plates do not need to be placed with the sealing material.
The 3 rd method: the membrane electrode frame structure adopted by Shanghai Shenli (patent No. 02283449.4) is composed of proton exchange membrane 4 partially extending outwards and filled with permeable resin adhesive film plastic 8 (or thermosetting rubber), wherein the middle layer is gasket layer 81, which is butted with the end of the extended proton exchange membrane, the two sides of the middle layer are attached with sealing layers 82, which are butted with the end of porous supporting material and permeate, the three layers of sealing materials are integrated, and the thickness of the sealing area is the same as that of the active area, as shown in FIG. 3.
Although the sealing technique can achieve the purpose of sealing the fuel cell, the following defects exist:
firstly, the drawback corresponding to the method 1 is that the proton exchange membrane is generally a rather expensive functional membrane material, and after a large amount of proton exchange membrane is exposed, the proton exchange membrane is not fully utilized, so that the waste is serious; meanwhile, the proton exchange membrane is an easily-aged and easily-cracked material, is directly contacted with a sealing material under pressure for a long time, and is more prone to cracking, so thatsealing failure is caused.
Secondly, the drawback of the method 2 is that it is difficult to arrange the sealing ring material on the diffusion layer material of the membrane electrode, especially on the diffusion layer material on both sides of the membrane electrode. In addition, the sealing rings are arranged on two sides of the proton exchange membrane, so that the local proton exchange membrane below the sealing rings bears huge concentrated pressure and is easily pressed to deform, and the local proton exchange membrane is easily broken to cause sealing failure after being pressed for a long time.
Thirdly, the method corresponding to the method 3 has the defects that the gas diffusion at the edge of the active region is influenced by the butt joint and permeation of the sealing layer and the end part of the porous support material, so that the catalyst at the edge cannot react with the gas, the utilization rate of the catalyst is reduced, meanwhile, the property difference between the sealing layer material and the porous support material is large, and the strength reliability after the sealing layer material and the porous support material are mutually permeated and connected is not high.
Disclosure of Invention
The present invention is directed to provide a membrane electrode frame structure of a proton exchange membrane fuel cell, which overcomes the above-mentioned drawbacks of the prior art.
In order to solve the technical problem, the utility model provides a membrane electrode frame structure of proton exchange membrane fuel cell, the device includes: the exchange membrane extends outwards along the edge of the diffusion layer supporting material by a small amount, the extension part of the exchange membrane and the diffusion layer supporting materialare glued by a sealing adhesive tape, a high-strength temperature-resistant plastic film is filled in the middle of the extension part, a resin adhesive film and the temperature-resistant plastic film are sequentially attached to the two surfaces of the extension part, and the thickness of the temperature-resistant plastic film in the middle layer is equivalent to that of the proton exchange membrane and is in butt joint with the end part of the extended proton exchange membrane.
The utility model has the advantages that: the utilization of the sealing adhesive tape does not influence the utilization of the catalyst at the edge of the active area, and the sealing effect is better. Compared with the prior art, the utility model discloses sealing reliability is high, and frame thickness is adjusted conveniently, and simple process can realize mass production.
Drawings
FIG. 1 is a schematic diagram of the structure of an original membrane electrode of the prior art; the method comprises the following steps:
an air inlet 1, a cooling water inlet 2, a hydrogen inlet 3, a proton exchange membrane 4, an activation part 5 coated with a catalyst
FIG. 2 is a schematic view of a prior art, European patent disclosing a membrane electrode seal arrangement; the method comprises the following steps:
air inlet 1, exchange membrane 4, sealing ring 6, support material 7
FIG. 3 is a schematic view of a membrane electrode sealing structure disclosed in the prior art, Chinese patent; the method comprises the following steps:
FIG. 4 is a frame structure of the membrane electrode of the PEM fuel cell of the present invention; the method comprises the following steps:
a proton exchange membrane 4, a diffusion layer supporting material 7, a sealing adhesive tape 9, a temperature-resistant plastic film 10 and a resin adhesive film 11.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 4 is a schematic diagram of the membrane electrode frame structure of the proton exchange membrane fuel cell of the present invention, the apparatus includes: the exchange membrane 4 outwards extends along the edge of the diffusion layer supporting material 7 by a small amount, the extending part of the exchange membrane 4 and the diffusion layer supporting material 7 are glued and protected by the sealing adhesive tape 9, so as to enhance the strength of the proton exchange membrane, the sealing adhesive tape 9 can adopt a thin polyimide adhesive tape or other material adhesive tapes, the two layers are divided into two layers, the two layers are symmetrically distributed on the two sides of the proton exchange membrane, and the surface of the porous diffusion layer supporting material is partially covered, but the internal gap of the porous supporting material is not blocked, so that the air permeability at the edge of the active region is not influenced, and the utilization of the catalyst at the edge of. Then filling a temperature-resistant plastic film 10 and a resin adhesive film 11 in the extending part, wherein the high-strength temperature-resistant plastic film 10 can adopt a polyester film, a polyimide film, a polysulfone film or other temperature-resistant polymer films, the thickness of the middle-layer temperature-resistant plastic film 10 is equivalent to that of the proton exchange membrane and is butted with the end part of the extended proton exchange membrane, and the resin adhesive film 11 and the temperature-resistant plastic film 10 are sequentially attached to two surfaces of the middle-layer temperature-resistant plastic film 10; the resin adhesive film 11 may be a thermosetting hot-melt organic adhesive film. The temperature-resistant plastic film 10, the resin film 11 and the extension part of the proton exchange membrane 4 are integrated into a whole in a one-step hot pressing mode to be used as a frame of the membrane electrode, so that the membrane electrode is ensured to be in close contact with a flow guide polar plate, and the membrane electrode and a cell stack are effectively sealed.
The thickness of the frame can be adjusted by selecting temperature-resistant plastic films 10 and resin films 11 with different thicknesses or increasing or decreasing the number of layers of the temperature-resistant plastic films 10 and the resin films 11 according to needs. The membrane electrode frame after hot pressing molding can be used for molding the through hole and the membrane electrode shape at one time by adopting a cutting die punching mode according to the specific shape of the flow guide polar plate.
The utility model discloses utilize the sealing tape to protect proton exchange membrane effectively, can not influence the utilization of active district edge catalyst, can have better sealed effect again, utilize the high strength plastic film of different thickness, resin glue membrane or adjust the thickness that the number of piles controlled the sealing area of use of temperature resistant plastic film, resin glue membrane simultaneously, the hot pressing shaping under the hot pressing condition. Compared with the prior art, the method has the advantages of high reliability, convenient frame thickness adjustment, simple process and the like, and can realize batch production.
Claims (6)
1. A membrane electrode frame of a proton exchange membrane fuel cell comprises a proton exchange membrane, a diffusion layer supporting material and a sealing material, and is characterized in that: the proton exchange membrane extends outwards a little along the edge of the support material of the diffusion layer, and the extension part of the exchange membrane is glued with the support material of the diffusion layer by using a sealing adhesive tape; the middle of the extending part is filled with a temperature-resistant plastic film, the two sides of the extending part are sequentially adhered with a resin adhesive film and the temperature-resistant plastic film, and the thickness of the temperature-resistant plastic film in the middle layer is equivalent to that of the proton exchange membrane and is butted with the end part of the extending proton exchange membrane.
2. The membrane electrode bezel according to claim 1, wherein: the sealing adhesive tape is a thin polyimide adhesive tape and is divided into two layers which are symmetrically distributed on two sides of the proton exchange membrane, and the surface of the diffusion layer supporting material is partially covered.
3. The membrane electrode bezel according to claim 1, wherein: the temperature-resistant plastic film is a polyester film, a polyimide film, a polysulfone film or other temperature-resistant polymer films; the resin adhesive film is a thermosetting hot melt adhesive organic adhesive film.
4. The membrane electrode bezel according to claim 1, wherein: the temperature-resistant plastic film, the resin film and the extension part of the proton exchange membrane are integrated into a whole in a one-step hot pressing mode.
5. The membrane electrode bezel according to claim 1, wherein: the thickness of the frame is adjusted by selecting temperature-resistant plastic films and resin films with different thicknesses as required, and the number of layers of the temperature-resistant plastic films and the resin films can be increased or decreased.
6. The membrane electrode bezel according to claim 1, wherein: after the membrane electrode frame is subjected to hot press molding, the through hole and the membrane electrode shape can be molded at one time by adopting a cutting die punching mode according to the specific shape of the flow guide polar plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200465880U CN2852407Y (en) | 2005-11-17 | 2005-11-17 | Membrane electrode frame structure of proton exchange membrane fuel cell |
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| CNU2005200465880U CN2852407Y (en) | 2005-11-17 | 2005-11-17 | Membrane electrode frame structure of proton exchange membrane fuel cell |
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| CN2852407Y true CN2852407Y (en) | 2006-12-27 |
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| CNU2005200465880U Expired - Fee Related CN2852407Y (en) | 2005-11-17 | 2005-11-17 | Membrane electrode frame structure of proton exchange membrane fuel cell |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800298A (en) * | 2010-03-11 | 2010-08-11 | 武汉理工新能源有限公司 | Frame laminate material and application thereof in preparing membrane electrode with sealed frame core component |
| CN103715435A (en) * | 2013-12-26 | 2014-04-09 | 清华大学 | Frame sealing technology for polymer electrolyte membrane electrode |
| CN106159304A (en) * | 2015-03-30 | 2016-11-23 | 宜兴市四通家电配件有限公司 | A kind of proton exchange film fuel cell electric piling and preparation method thereof |
| CN106941182A (en) * | 2017-02-20 | 2017-07-11 | 南京大学 | A kind of membrane electrode of fuel batter with proton exchange film sealed frame |
| WO2017190565A1 (en) * | 2016-05-06 | 2017-11-09 | 安徽巨大电池技术有限公司 | Battery pack and battery cell thereof |
| CN109314256A (en) * | 2016-06-15 | 2019-02-05 | 3M创新有限公司 | Membrane electrode assembly component and the method for preparing component |
| CN109638293A (en) * | 2018-10-26 | 2019-04-16 | 浙江博氢新能源有限公司 | High-temperature fuel cell membrane electrode and preparation method thereof and assemble method |
| CN109980245A (en) * | 2019-03-22 | 2019-07-05 | 苏州钧峰新能源科技有限公司 | The encapsulating method of bipolar plates and membrane electrode in a kind of direct methanol fuel cell |
| CN110380079A (en) * | 2019-07-17 | 2019-10-25 | 广州市黄埔乐天实业有限公司 | Seal structure of fuel cell |
| CN110416571A (en) * | 2019-07-17 | 2019-11-05 | 广州市黄埔乐天实业有限公司 | Fuel cell pile structure |
| CN111640972A (en) * | 2020-06-02 | 2020-09-08 | 浙江锋源氢能科技有限公司 | Membrane electrode, single cell assembly and fuel cell stack |
| CN112103541A (en) * | 2020-09-17 | 2020-12-18 | 广东国鸿氢能科技有限公司 | Integrated sealed membrane electrode structure |
| CN112186216A (en) * | 2019-07-05 | 2021-01-05 | 深圳市南科燃料电池有限公司 | Packaging method and membrane electrode assembly |
| CN113540495A (en) * | 2021-07-09 | 2021-10-22 | 刘学军 | Flow frame structure of flow battery and side surface packaging method thereof |
| CN113972390A (en) * | 2020-07-23 | 2022-01-25 | 未势能源科技有限公司 | Fuel cell unit cell |
| WO2024048586A1 (en) * | 2022-08-30 | 2024-03-07 | Ｔｏｐｐａｎホールディングス株式会社 | Membrane electrode assembly for water electrolysis tank |
-
2005
- 2005-11-17 CN CNU2005200465880U patent/CN2852407Y/en not_active Expired - Fee Related
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800298B (en) * | 2010-03-11 | 2012-01-11 | 武汉理工新能源有限公司 | Frame laminate material and application thereof in preparing membrane electrode with sealed frame core component |
| CN101800298A (en) * | 2010-03-11 | 2010-08-11 | 武汉理工新能源有限公司 | Frame laminate material and application thereof in preparing membrane electrode with sealed frame core component |
| CN103715435A (en) * | 2013-12-26 | 2014-04-09 | 清华大学 | Frame sealing technology for polymer electrolyte membrane electrode |
| CN103715435B (en) * | 2013-12-26 | 2015-10-28 | 清华大学 | A kind of edge banding frame technique of polymer electrolyte membrane electrode |
| CN106159304A (en) * | 2015-03-30 | 2016-11-23 | 宜兴市四通家电配件有限公司 | A kind of proton exchange film fuel cell electric piling and preparation method thereof |
| WO2017190565A1 (en) * | 2016-05-06 | 2017-11-09 | 安徽巨大电池技术有限公司 | Battery pack and battery cell thereof |
| CN109314256A (en) * | 2016-06-15 | 2019-02-05 | 3M创新有限公司 | Membrane electrode assembly component and the method for preparing component |
| CN106941182A (en) * | 2017-02-20 | 2017-07-11 | 南京大学 | A kind of membrane electrode of fuel batter with proton exchange film sealed frame |
| CN109638293A (en) * | 2018-10-26 | 2019-04-16 | 浙江博氢新能源有限公司 | High-temperature fuel cell membrane electrode and preparation method thereof and assemble method |
| CN109980245A (en) * | 2019-03-22 | 2019-07-05 | 苏州钧峰新能源科技有限公司 | The encapsulating method of bipolar plates and membrane electrode in a kind of direct methanol fuel cell |
| CN109980245B (en) * | 2019-03-22 | 2021-10-29 | 苏州钧峰新能源科技有限公司 | Sealing method for bipolar plate and membrane electrode in direct methanol fuel cell |
| CN112186216A (en) * | 2019-07-05 | 2021-01-05 | 深圳市南科燃料电池有限公司 | Packaging method and membrane electrode assembly |
| CN110380079A (en) * | 2019-07-17 | 2019-10-25 | 广州市黄埔乐天实业有限公司 | Seal structure of fuel cell |
| CN110416571A (en) * | 2019-07-17 | 2019-11-05 | 广州市黄埔乐天实业有限公司 | Fuel cell pile structure |
| CN111640972A (en) * | 2020-06-02 | 2020-09-08 | 浙江锋源氢能科技有限公司 | Membrane electrode, single cell assembly and fuel cell stack |
| CN113972390A (en) * | 2020-07-23 | 2022-01-25 | 未势能源科技有限公司 | Fuel cell unit cell |
| CN112103541A (en) * | 2020-09-17 | 2020-12-18 | 广东国鸿氢能科技有限公司 | Integrated sealed membrane electrode structure |
| CN113540495A (en) * | 2021-07-09 | 2021-10-22 | 刘学军 | Flow frame structure of flow battery and side surface packaging method thereof |
| CN113540495B (en) * | 2021-07-09 | 2022-09-20 | 刘学军 | Flow frame structure of flow battery and side surface packaging method thereof |
| WO2024048586A1 (en) * | 2022-08-30 | 2024-03-07 | Ｔｏｐｐａｎホールディングス株式会社 | Membrane electrode assembly for water electrolysis tank |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061227 Termination date: 20141117 |
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| EXPY | Termination of patent right or utility model |