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WO2009119766A1 - Pile à combustible - Google Patents

Pile à combustible Download PDF

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Publication number
WO2009119766A1
WO2009119766A1 PCT/JP2009/056179 JP2009056179W WO2009119766A1 WO 2009119766 A1 WO2009119766 A1 WO 2009119766A1 JP 2009056179 W JP2009056179 W JP 2009056179W WO 2009119766 A1 WO2009119766 A1 WO 2009119766A1
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WO
WIPO (PCT)
Prior art keywords
fuel
fuel cell
electrode assembly
membrane electrode
current collector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2009/056179
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English (en)
Japanese (ja)
Inventor
信保 根岸
清司 瀬上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Publication of WO2009119766A1 publication Critical patent/WO2009119766A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1009—Fuel cells with solid electrolytes with one of the reactants being liquid, solid or liquid-charged
    • H01M8/1011—Direct alcohol fuel cells [DAFC], e.g. direct methanol fuel cells [DMFC]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
    • H01M8/0432—Temperature; Ambient temperature
    • H01M8/04365—Temperature; Ambient temperature of other components of a fuel cell or fuel cell stacks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1097—Fuel cells applied on a support, e.g. miniature fuel cells deposited on silica supports
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/30—Fuel cells in portable systems, e.g. mobile phone, laptop
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/10—Applications of fuel cells in buildings
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a fuel cell, and more particularly, to a fuel cell including a current collector that collects current in contact with an electrode of a membrane electrode assembly.
  • a fuel cell is characterized in that it can generate electric power simply by supplying fuel and air, and can generate electric power continuously for a long time if fuel is replenished. For this reason, if the fuel cell can be reduced in size, it can be said that the system is extremely advantageous as a power source for portable electronic devices.
  • a direct methanol fuel cell (DMFC) using methanol as a fuel is promising as a power source for portable electronic devices because it can be miniaturized and the fuel can be easily handled.
  • DMFC direct methanol fuel cell
  • the liquid fuel supply method in the DMFC there are known an active method such as a gas supply type and a liquid supply type, and a passive method such as an internal vaporization type in which the liquid fuel in the fuel container is vaporized inside the cell and supplied to the fuel electrode. It has been.
  • passive methods such as the internal vaporization type are advantageous for downsizing the DMFC.
  • a passive type DMFC for example, a structure in which a membrane electrode assembly (MEA) having a fuel electrode, an electrolyte membrane, and an air electrode is arranged on a fuel storage portion formed of a box-like container has been proposed (for example, International Publication No. 1). 2005/112172 pamphlet).
  • MEA membrane electrode assembly
  • 2005/112172 pamphlet it is also considered to connect a fuel cell of DMFC and a fuel storage part via a flow path (see, for example, JP 2005-518646 A and JP 2006-089552 A).
  • the voltage obtained from the fuel cell is usually minute, it is often used after being boosted by a DC / DC converter.
  • a current collector for example, a structure in which a cathode conductive layer and an anode conductive layer are integrated on a single insulating film has been proposed as described in, for example, pamphlet of International Publication No. 2006/057283.
  • An object of the present invention is to provide a fuel cell capable of reducing the manufacturing cost and obtaining a stable output.
  • a fuel cell includes: Membrane electrode junction comprising an electrolyte membrane, a plurality of fuel electrodes disposed on one surface of the electrolyte membrane, and a plurality of air electrodes disposed on the other surface of the electrolyte membrane and facing each of the fuel electrodes Body, An insulating substrate sandwiching the membrane electrode assembly;
  • a fuel cell comprising: The insulating substrate comprises: a current collector that electrically connects each set of the fuel electrode and the air electrode of the membrane electrode assembly on an insulating film; and a temperature detection unit that detects temperature. It is characterized by having.
  • FIG. 1 is a cross-sectional view schematically showing a configuration of a fuel cell according to an embodiment of the present invention.
  • FIG. 2 is a plan view schematically showing the appearance of the membrane electrode assembly in the fuel cell shown in FIG.
  • FIG. 3 is a perspective view when the membrane electrode assembly shown in FIG. 2 is cut along the line III-III.
  • FIG. 4 is a perspective view schematically showing the structure of the fuel distribution plate of the fuel supply unit in the fuel supply mechanism applicable to the fuel cell shown in FIG.
  • FIG. 5 is a plan view of the fuel distribution plate shown in FIG.
  • FIG. 6 is a plan view schematically showing the structure of an insulating substrate applicable to the fuel cell according to one embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of the insulating substrate shown in FIG.
  • FIG. 6 taken along the line VII-VII.
  • FIG. 8 is a cross-sectional view of the insulating substrate shown in FIG. 6 taken along line VIII-VIII.
  • FIG. 9 is a plan view schematically showing another structure of the insulating substrate applicable to the fuel cell according to the embodiment of the present invention.
  • FIG. 10 is a cross-sectional view of the insulating substrate shown in FIG. 6 taken along line XX.
  • FIG. 11 is a plan view schematically showing another structure of the insulating substrate applicable to the fuel cell according to the embodiment of the present invention.
  • FIG. 1 is a cross-sectional view schematically showing a main part of a fuel cell 1 according to this embodiment.
  • the fuel cell 1 mainly includes a membrane electrode assembly (MEA) 2 that constitutes an electromotive unit, a fuel supply mechanism 3 that supplies fuel to the membrane electrode assembly 2, and a fuel storage unit 4 that stores liquid fuel. Has been.
  • MEA membrane electrode assembly
  • the membrane electrode assembly 2 includes an anode (fuel electrode) 13 having an anode catalyst layer 11 and an anode gas diffusion layer 12, and a cathode (cathode catalyst layer 14 and cathode gas diffusion layer 15).
  • Examples of the catalyst contained in the anode catalyst layer 11 and the cathode catalyst layer 14 include platinum such as platinum (Pt), ruthenium (Ru), rhodium (Rh), iridium (Ir), osmium (Os), and palladium (Pd). Examples thereof include a group element simple substance and an alloy containing a platinum group element.
  • platinum platinum
  • Ru ruthenium
  • Rh rhodium
  • Ir iridium
  • Os osmium
  • Pd palladium
  • Examples thereof include a group element simple substance and an alloy containing a platinum group element.
  • Pt—Ru, Pt—Mo, or the like that has strong resistance to methanol, carbon monoxide, or the like.
  • Pt, Pt—Ni, or the like is preferably used for the cathode catalyst layer 14.
  • Examples of the proton conductive material constituting the electrolyte membrane 17 include fluorine-based resins (Nafion (trade name, manufactured by DuPont) and Flemion (trade name, manufactured by Asahi Glass Co., Ltd.) such as a perfluorosulfonic acid polymer having a sulfonic acid group. Etc.), organic materials such as hydrocarbon resins having sulfonic acid groups, or inorganic materials such as tungstic acid and phosphotungstic acid.
  • fluorine-based resins Nafion (trade name, manufactured by DuPont) and Flemion (trade name, manufactured by Asahi Glass Co., Ltd.)
  • organic materials such as hydrocarbon resins having sulfonic acid groups
  • inorganic materials such as tungstic acid and phosphotungstic acid.
  • the proton conductive electrolyte membrane 17 is not limited to these.
  • the anode catalyst layer 11 is disposed on the electrolyte membrane 17.
  • the anode gas diffusion layer 12 is laminated on the anode catalyst layer 11.
  • the anode gas diffusion layer 12 serves to uniformly supply fuel to the anode catalyst layer 11.
  • the cathode catalyst layer 14 is disposed on the electrolyte membrane 17.
  • the cathode gas diffusion layer 15 is laminated on the cathode catalyst layer 14.
  • the cathode gas diffusion layer 15 serves to uniformly supply the oxidant to the cathode catalyst layer 14.
  • These anode gas diffusion layer 12 and cathode gas diffusion layer 15 are made of a porous substrate having conductivity such as carbon paper or carbon fiber.
  • a conductive layer is laminated on the anode gas diffusion layer 12 and the cathode gas diffusion layer 15 as necessary.
  • These conductive layers include, for example, a mesh made of a conductive metal material such as gold (Au), a porous film, a thin film or a foil, or a conductive metal material such as stainless steel (SUS) and a good conductivity such as gold.
  • a composite material coated with a conductive metal is used.
  • the membrane electrode assembly 2 is sealed by a seal member 19 such as a rubber O-ring disposed on the anode side and the cathode side of the electrolyte membrane 17, thereby preventing fuel leakage from the membrane electrode assembly 2. Oxidant leakage is prevented.
  • a seal member 19 such as a rubber O-ring disposed on the anode side and the cathode side of the electrolyte membrane 17, thereby preventing fuel leakage from the membrane electrode assembly 2. Oxidant leakage is prevented.
  • a plate-like body 20 made of an insulating material is disposed on the cathode 16 side of the membrane electrode assembly 2.
  • This plate-like body 20 mainly functions as a moisture retaining layer. That is, the plate-like body 20 is impregnated with a part of the water generated in the cathode catalyst layer 14 to suppress the transpiration of water, adjusts the amount of air taken into the cathode catalyst layer 14 and makes the air uniform. Promotes diffusion.
  • the plate-like body 20 is an insulating layer having a thermal conductivity lower than that of the cathode gas diffusion layer 15 or a layer having a high resistance corresponding thereto.
  • the plate-like body 20 is composed of a porous structure member. And a porous body of polypropylene.
  • the membrane electrode assembly 2 includes a plurality of anodes 13 disposed on one surface 17A of the same electrolyte membrane 17 and a plurality of anodes 17 disposed on the other surface 17B of the electrolyte membrane 17.
  • Each anode 13 and each cathode 16 are opposed to each other with the electrolyte membrane 17 interposed therebetween. That is, each set of the anode 13 and the cathode 16 constitutes a single cell C, and each of them is arranged separately on the plane of the electrolyte membrane 17.
  • the membrane electrode assembly 2 includes four anodes 131 to 134 disposed on one surface 17A of the single electrolyte membrane 17, and the other surface of the electrolyte membrane 17. And four cathodes 161 to 164 arranged in 17B.
  • the anode 131 and the cathode 161 are arranged so as to face each other, and constitute a set of single cells C.
  • the anode 132 and the cathode 162 are arranged so as to face each other
  • the anode 133 and the cathode 163 are arranged so as to face each other
  • the anode 134 and the cathode 164 are arranged so as to face each other.
  • Four sets of single cells C are arranged on the same plane.
  • the fuel cell 1 includes a current collector 40 that electrically connects each set of the anode 13 and the cathode 16 in series.
  • the structure of the current collector 40 will be described in detail later.
  • the membrane electrode assembly 2 described above is sandwiched between the insulating substrates F and disposed between the fuel supply mechanism 3 and the cover plate 21.
  • the cover plate 21 has a substantially box-like appearance and is made of, for example, stainless steel (SUS).
  • the cover plate 21 has a plurality of openings (air introduction holes) 21A for taking in air as an oxidant.
  • the fuel supply mechanism 3 includes a container 30 formed in a box shape, and is connected to the fuel storage unit 4 via the flow path 5. That is, the container 30 has a fuel inlet 30A, and the fuel inlet 30A and the flow path 5 are connected.
  • the container 30 is constituted by a resin container, for example.
  • the material forming the container 30 preferably has methanol resistance and the like.
  • the resin material forming the container 30 include polyethylene naphthalate, polyethylene terephthalate, cyclic olefin copolymer, cycloolefin polymer, polymethylpentene, and polyphenylsulfone.
  • the container 30 made of an olefin resin such as a general polyethylene resin or polypropylene resin is not excluded.
  • the fuel supply mechanism 3 includes a fuel supply unit 31 that supplies fuel while dispersing and diffusing fuel in the surface direction of the anode 13 of the membrane electrode assembly 2.
  • the fuel supply unit 31 includes the fuel distribution plate 31A, but may have other configurations.
  • the fuel distribution plate 31 ⁇ / b> A has at least one fuel injection port 32 and a plurality of fuel discharge ports 33, via a fuel passage such as a narrow tube 34.
  • the fuel injection port 32 and the fuel discharge port 33 are connected.
  • the fuel passage may be constituted by a fuel flow groove or the like instead of the narrow tube 34 formed in the fuel distribution plate 31A.
  • the fuel distribution plate 31A can also be configured by covering the flow path plate having the fuel flow grooves with a diffusion plate having a plurality of fuel discharge ports.
  • the fuel inlet 32 is provided at one location and communicates with the fuel inlet 30 ⁇ / b> A of the container 30.
  • the fuel inlet 32 of the fuel distribution plate 31 ⁇ / b> A is connected to the fuel storage portion 4 via the flow path 5.
  • a fuel injection port 32 is provided at one end (starting end) of the thin tube 34.
  • the narrow tube 34 is branched into a plurality of parts along the way, and a fuel discharge port 33 is provided at each terminal portion of the branched narrow tube 34.
  • the thin tube 34 is preferably a through hole having an inner diameter of 0.05 to 5 mm, for example.
  • the liquid fuel injected from the fuel injection port 32 is guided to a plurality of fuel discharge ports 33 through a plurality of thin tubes 34.
  • a fuel distribution plate 31A the liquid fuel injected from the fuel injection port 32 can be evenly distributed to the plurality of fuel discharge ports 33 regardless of the direction or position. Therefore, the uniformity of the power generation reaction in the surface of the membrane electrode assembly 2 can be further enhanced.
  • the membrane electrode assembly 2 is disposed so that the anode 13 faces the fuel discharge port 33 of the fuel distribution plate 31A as described above.
  • the cover plate 21 is fixed to the container 30 by a method such as caulking or screwing in a state where the membrane electrode assembly 2 is held between the cover plate 21 and the fuel supply mechanism 3. Thereby, the power generation unit of the fuel cell (DMFC) 1 is configured.
  • the fuel supply unit 31 has a configuration in which a space functioning as a fuel diffusion chamber 31B is formed between the fuel distribution plate 31A and the membrane electrode assembly 2.
  • the fuel diffusion chamber 31 ⁇ / b> B has a function of promoting vaporization and promoting diffusion in the surface direction even when liquid fuel is discharged from the fuel discharge port 33.
  • a support member that supports the membrane electrode assembly 2 from the anode 7 side may be disposed between the membrane electrode assembly 2 and the fuel supply unit 31.
  • At least one porous body may be disposed between the membrane electrode assembly 2 and the fuel supply unit 31.
  • the liquid storage unit 4 stores liquid fuel corresponding to the membrane electrode assembly 2.
  • Liquid fuels include methanol fuels such as aqueous methanol solutions of various concentrations and pure methanol.
  • the liquid fuel is not necessarily limited to methanol fuel.
  • the liquid fuel may be, for example, an ethanol fuel such as an ethanol aqueous solution or pure ethanol, a propanol fuel such as a propanol aqueous solution or pure propanol, a glycol fuel such as a glycol aqueous solution or pure glycol, dimethyl ether, formic acid, or other liquid fuel.
  • liquid fuel corresponding to the membrane electrode assembly 2 is stored in the fuel storage portion 4.
  • a pump 6 may be interposed in the flow path 5.
  • the pump 6 is not a circulation pump that circulates fuel, but is a fuel supply pump that sends liquid fuel from the fuel storage unit 4 to the fuel supply unit 31 to the last.
  • the fuel supplied from the fuel supply unit 31 to the membrane electrode assembly 2 is used for a power generation reaction, and is not circulated thereafter and returned to the fuel storage unit 4.
  • the fuel cell 1 of this embodiment is different from the conventional active method because it does not circulate the fuel, and does not impair the downsizing of the device. Further, the pump 6 is used to supply the liquid fuel, which is different from a pure passive system such as a conventional internal vaporization type.
  • the fuel cell 1 shown in FIG. 1 employs a system called a semi-passive type, for example.
  • the type of the pump 6 is not particularly limited, but a rotary vane pump, an electroosmotic pump, and a diaphragm pump can be used from the viewpoint that a small amount of liquid fuel can be fed with good controllability and can be reduced in size and weight. It is preferable to use a squeezing pump or the like.
  • Rotary vane pumps feed liquid by rotating wings with a motor.
  • the electroosmotic flow pump uses a sintered porous body such as silica that causes an electroosmotic flow phenomenon.
  • a diaphragm pump drives a diaphragm with an electromagnet or piezoelectric ceramics to send liquid.
  • the squeezing pump presses a part of a flexible fuel flow path and squeezes the fuel.
  • a reservoir may be provided between the pump 6 and the fuel supply unit 31.
  • a fuel cutoff valve may be arranged in series with the pump 6.
  • an electrically driven valve capable of controlling an opening / closing operation with an electric signal using an electromagnet, a motor, a shape memory alloy, piezoelectric ceramics, bimetal, or the like as an actuator is applied.
  • the fuel cutoff valve is preferably a latch type valve having a state maintaining function.
  • a balance valve that balances the pressure in the fuel storage unit 4 with the outside air may be attached to the fuel storage unit 4 and the flow path 5.
  • a balance valve that balances the pressure in the fuel storage unit 4 with the outside air may be attached to the fuel storage unit 4 and the flow path 5.
  • liquid fuel is intermittently sent from the fuel storage unit 4 to the fuel supply unit 31 using the pump 6.
  • the liquid fuel fed by the pump 6 is uniformly supplied to the entire surface of the anode 13 of the membrane electrode assembly 2 through the fuel supply unit 31.
  • the fuel is uniformly supplied to the planar direction of each anode 13 of the plurality of single cells C, thereby generating a power generation reaction.
  • the operation of the fuel supply (liquid feeding) pump 6 is preferably controlled based on the output of the fuel cell 1, temperature information, operation information of an electronic device that is a power supply destination, and the like.
  • the fuel released from the fuel supply unit 31 is supplied to the anode 13 of the membrane electrode assembly 2.
  • the fuel diffuses through the anode gas diffusion layer 12 and is supplied to the anode catalyst layer 11.
  • an internal reforming reaction of methanol shown in the following formula (1) occurs in the anode catalyst layer 11.
  • pure methanol is used as the methanol fuel
  • the water generated in the cathode catalyst layer 14 or the water in the electrolyte membrane 17 is reacted with methanol to cause the internal reforming reaction of the formula (1).
  • the internal reforming reaction is caused by another reaction mechanism that does not require water.
  • the insulating substrate F applicable in this embodiment has an area approximately twice the outer dimension of the membrane electrode assembly 2 and is folded in two. Thus, the membrane electrode assembly 2 is sandwiched.
  • the insulating substrate F includes an insulating film BF as a base, a conductive layer CL patterned on at least one surface of the insulating film BF, and a cover film CF that covers the conductive layer CL. Yes.
  • the insulating film BF and the cover film CF are preferably formed of a material having corrosion resistance against the fuel used or a product generated by a power generation reaction, and is formed of, for example, polyimide.
  • the material of the insulating film BF and the cover film CF is not limited to polyimide (PI), but is a thermoplastic polyester resin material such as polyethylene terephthalate (PET) having electrical insulation, polyetherimide, polyetheretherketone (PEEK). : Victorex PLC Co., Ltd.), perfluoro resin, fluororesin, polyethylene (PE), polyethylene naphthalate (PEN), polypropylene (PP), polyphenylene sulfide (PPS), and other various resin materials can be used.
  • PI polyimide
  • PET polyethylene terephthalate
  • PEEK polyetheretherketone
  • the conductive layer CL is formed of, for example, copper (Cu) and is covered with a conductive film having corrosion resistance.
  • the copper foil is covered with nickel (Ni), and the surface of the nickel film is further covered with gold (Au). That is, the surface of the conductive layer CL is formed of gold (Au).
  • the insulating substrate F includes the current collector 40 as the conductive layer CL.
  • the current collector 40 has a plurality of first electrode portions 41 and a plurality of second electrode portions 42.
  • the first electrode portion 41 and the second electrode portion 42 are disposed on the same surface on the insulating film BF.
  • at least some of the surfaces (here, gold foil) of the first electrode portion 41 and the second electrode portion 42 are exposed from the cover film CF.
  • the first electrode portion 41 corresponds to an anode current collector provided corresponding to each of the anodes 13 and is provided in the same number as the anodes 13 included in the membrane electrode assembly 2.
  • the second electrode portion 42 corresponds to a cathode current collector provided corresponding to each of the cathodes 16 and is provided in the same number as the cathodes 16 included in the membrane electrode assembly 2.
  • the current collector 40 includes four first electrode portions 411 to 414 and four second electrode portions 421 to 424.
  • the first electrode portion 411 is disposed corresponding to the anode 131, and similarly, the first electrode portion 412 is disposed corresponding to the anode 132, the first electrode portion 413 is disposed corresponding to the anode 133, The electrode portion 414 is disposed corresponding to the anode 134.
  • the second electrode portion 421 is disposed corresponding to the cathode 161.
  • the second electrode portion 422 is disposed corresponding to the cathode 162
  • the second electrode portion 423 is disposed corresponding to the cathode 163
  • the second The electrode portion 424 is disposed corresponding to the cathode 164.
  • the first electrode portion 41 and the second electrode portion 42 are formed so as to be in contact with the corresponding anode 13 and cathode 16, respectively.
  • the portion of the first electrode portion 41 exposed from the cover film CF is in contact with the anode 13, particularly the anode gas diffusion layer 12.
  • the portion of the second electrode portion 42 exposed from the cover film CF is in contact with the cathode 16, particularly the cathode gas diffusion layer 15. That is, the surfaces of the first electrode portion 41 and the second electrode portion 42 that are in contact with the membrane electrode assembly 2 are made of gold (Au).
  • Au gold foil is more preferable as a material for forming an electrode surface because it has a relatively low electric resistance and a strong corrosion resistance that can withstand a corrosive atmosphere generated by a power generation reaction.
  • the insulating substrate F includes an output terminal 46 and an output terminal 47 connected to the current collector 40. That is, in the current collector 40, output terminals 46 and 47 for extracting collected electrons are respectively connected to the first electrode portion 411 and the second electrode portion 424 which are arranged at positions farthest from each other. These output terminals 46 and 47 are exposed from the cover film CF.
  • the first electrode part 41 and the second electrode part 42 that do not have an output terminal are electrically connected by a connecting part 48, respectively.
  • the first electrode portion 412 and the second electrode portion 421 are connected by the connecting portion 481
  • the first electrode portion 413 and the second electrode portion 422 are connected by the connecting portion 482.
  • the first electrode part 414 and the second electrode part 423 are connected by a connecting part 483.
  • the membrane electrode assembly 2 is accommodated in the inner space folded in half. That is, each of the first electrode portions 41 is electrically connected to the corresponding anode 13, and each of the second electrode portions 42 is electrically connected to the corresponding cathode 16. Therefore, the membrane electrode assembly 2 is sandwiched.
  • the insulating substrate F preferably has a hole penetrating the insulating film BF.
  • the insulating substrate F passes through the insulating film BF between the adjacent first electrode portions 41 or between the adjacent second electrode portions 42 to release a gas component generated by the power generation reaction.
  • the cathode gas diffusion layer 15 is exposed through the insulating film BF, and air introduction holes 42H for supplying air to the cathode catalyst layer 14 are provided.
  • the insulating substrate F described above includes a temperature detection unit 50 that detects the temperature in addition to the current collector 40.
  • This temperature detector 50 is mainly used to detect the temperature of the membrane electrode assembly 2.
  • the temperature detection part 50 is arrange
  • Such a temperature detection unit 50 includes, as the conductive layer CL, a signal wiring 51 that can be formed of the same material as the current collector 40, and a detection element 52 connected to the signal wiring 51.
  • the signal wiring 51 is disposed between the electrode portions constituting the current collector 40 on the insulating film BF. In the example shown here, the signal wiring 51 is disposed between the second electrode portions 42.
  • the signal wiring 51 is covered with a cover film CF. One end side of the signal wiring 51 is exposed from the cover film CF.
  • the detection element 52 is constituted by a thermistor, for example.
  • the detection element 52 is electrically connected to one end side of the signal wiring 51 exposed from the cover film CF. That is, in the example shown here, the detection element 52 is disposed between the second electrode portions 42. Note that the signal wiring 51 and the detection element 52 may be disposed between the first electrode portions 41.
  • the insulating substrate F includes an output terminal 53 connected to the other end of the signal wiring 51.
  • the output terminal 53 is exposed from the cover film CF.
  • the temperature detector 50 can be integrated with the current collector 40 on the insulating film. For this reason, by sandwiching the membrane electrode assembly 2 by the insulating substrate F, it becomes possible to collect current by connecting a plurality of single cells C in the membrane electrode assembly 2 in series by the current collector 40, and The temperature detector 50 can detect the temperature at a predetermined position of the membrane electrode assembly 2. For this reason, the assembly operation of the fuel cell 1 becomes easy, the manufacturing cost can be reduced, and the output can be stably obtained.
  • the temperature detection unit 50 can be fixedly arranged at a predetermined position, and the temperature at a desired position in the membrane electrode assembly 2 can be stably detected.
  • the output terminals 46 and 47 connected to the current collector 40 and the output terminal 53 connected to the temperature detection unit 50 can be directly connected to an external circuit board (including a power supply circuit) by a connector. It becomes possible. For this reason, complicated connection work using solder or the like is not required, and the assembly work of the fuel cell 1 is facilitated.
  • the temperature detection unit 50 is not limited to the example illustrated in FIG. 6, and may be disposed on a surface different from the surface on which the current collector 40 of the insulating film BF is disposed.
  • the current collector 40 in the insulating substrate F, is disposed on one surface BFa of the insulating film BF, whereas the temperature detection unit 50 is formed of the insulating film BF. Arranged on the other surface BFb.
  • the current collector 40 and the temperature detection unit 50 are configured in the same manner as in the example shown in FIG. 6, but the arrangement position of the temperature detection unit 50 is not particularly limited. That is, similarly to the example shown in FIG. 6, the signal wiring 51 and the detection element 52 may be disposed on the back side surface BFb at a position corresponding to the space between the electrode portions constituting the current collector 40. It may be arranged on the surface BFb on the back side of the part.
  • a plurality of temperature detection units 50 may be arranged on a single insulating substrate F. As shown in FIG. 11, when a plurality of temperature detection units 50 are arranged on the insulating film BF, the signal wirings 51 are routed on the insulating film BF to be integrated into one output terminal 53. Is desirable.
  • the fuel cell 1 of each embodiment described above is effective when various liquid fuels are used, and the type and concentration of the liquid fuel are not limited.
  • the fuel supply unit 31 that supplies fuel while being dispersed in the plane direction is particularly effective when the fuel concentration is high.
  • the fuel cell 1 of each embodiment can exhibit its performance and effects particularly when methanol having a concentration of 80 wt% or more is used as the liquid fuel. Therefore, each embodiment is suitable for the fuel cell 1 using a methanol aqueous solution having a methanol concentration of 80 wt% or more or pure methanol as a liquid fuel.
  • the present invention can be applied to various fuel cells using liquid fuel.
  • the specific configuration of the fuel cell, the supply state of the fuel, and the like are not particularly limited, and all of the fuel supplied to the MEA is liquid fuel vapor, all is liquid fuel, or part is liquid state.
  • the present invention can be applied to various forms such as a vapor of supplied liquid fuel.
  • the constituent elements can be modified and embodied without departing from the technical idea of the present invention.
  • various modifications are possible, such as appropriately combining a plurality of constituent elements shown in the above embodiment, or deleting some constituent elements from all the constituent elements shown in the embodiment.
  • Embodiments of the present invention can be expanded or modified within the scope of the technical idea of the present invention, and these expanded and modified embodiments are also included in the technical scope of the present invention.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)
  • Inert Electrodes (AREA)

Abstract

L'invention porte sur une pile à combustible qui comprend : un ensemble membrane-électrode (2) comprenant une membrane électrolytique, une pluralité d'électrodes à combustible disposées d'un côté de la membrane électrolytique, et une pluralité d'électrodes à air disposées de l'autre côté de la membrane électrolytique de façon à faire face aux électrodes à combustible; et un substrat isolant (F) qui prend en sandwich l'ensemble membrane-électrode (2). Le substrat isolant (F) est caractérisé par le fait qu'il comprend, au-dessus d'un film isolant (BF), un collecteur de courant (40) qui connecte électriquement les paires d'électrodes à combustible et d'électrodes à air de l'ensemble membrane-électrode en série, et un détecteur de température (50) qui détecte la température.
PCT/JP2009/056179 2008-03-27 2009-03-26 Pile à combustible Ceased WO2009119766A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-083590 2008-03-27
JP2008083590A JP2009238597A (ja) 2008-03-27 2008-03-27 燃料電池

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WO2009119766A1 true WO2009119766A1 (fr) 2009-10-01

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TW (1) TW201008015A (fr)
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Cited By (3)

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WO2010095510A1 (fr) * 2009-02-20 2010-08-26 株式会社 東芝 Pile à combustible
CN109860654A (zh) * 2019-01-21 2019-06-07 西安交通大学 一种物料分离传输燃料电池及其工作方法
SE2351387A1 (en) * 2023-12-04 2025-06-05 Fuel Cell Tech Sweden Ab Planar fuel cell assemblyplanar fuel cell assembly and method of manufacturing thereof

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JP5528259B2 (ja) 2010-05-17 2014-06-25 日東電工株式会社 配線回路基板の製造方法
CN109449472B (zh) * 2018-10-16 2021-08-31 深圳职业技术学院 一种甲醇燃料电池外壳及其制备方法

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JP2003346867A (ja) * 2002-05-27 2003-12-05 Seiko Epson Corp 燃料電池及びその製造方法
JP2004200064A (ja) * 2002-12-19 2004-07-15 Fujitsu Component Ltd 燃料電池および燃料電池スタック
WO2006057283A1 (fr) * 2004-11-25 2006-06-01 Kabushiki Kaisha Toshiba Pile a combustible
JP2006253079A (ja) * 2005-03-14 2006-09-21 Hitachi Ltd 燃料電池ユニット及び燃料電池ユニット集合体並びに電子機器
JP2006331731A (ja) * 2005-05-24 2006-12-07 Kri Inc 膜−電極接合体及びこれを用いた固体高分子形燃料電池
JP2007080746A (ja) * 2005-09-15 2007-03-29 Dainippon Printing Co Ltd 平面型の高分子電解質型燃料電池用のセパレータ組みおよび平面型の高分子電解質型燃料電池
WO2008096650A1 (fr) * 2007-02-06 2008-08-14 Kabushiki Kaisha Toshiba Pile à combustible

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Publication number Priority date Publication date Assignee Title
JP2003346867A (ja) * 2002-05-27 2003-12-05 Seiko Epson Corp 燃料電池及びその製造方法
JP2004200064A (ja) * 2002-12-19 2004-07-15 Fujitsu Component Ltd 燃料電池および燃料電池スタック
WO2006057283A1 (fr) * 2004-11-25 2006-06-01 Kabushiki Kaisha Toshiba Pile a combustible
JP2006253079A (ja) * 2005-03-14 2006-09-21 Hitachi Ltd 燃料電池ユニット及び燃料電池ユニット集合体並びに電子機器
JP2006331731A (ja) * 2005-05-24 2006-12-07 Kri Inc 膜−電極接合体及びこれを用いた固体高分子形燃料電池
JP2007080746A (ja) * 2005-09-15 2007-03-29 Dainippon Printing Co Ltd 平面型の高分子電解質型燃料電池用のセパレータ組みおよび平面型の高分子電解質型燃料電池
WO2008096650A1 (fr) * 2007-02-06 2008-08-14 Kabushiki Kaisha Toshiba Pile à combustible

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010095510A1 (fr) * 2009-02-20 2010-08-26 株式会社 東芝 Pile à combustible
CN109860654A (zh) * 2019-01-21 2019-06-07 西安交通大学 一种物料分离传输燃料电池及其工作方法
SE2351387A1 (en) * 2023-12-04 2025-06-05 Fuel Cell Tech Sweden Ab Planar fuel cell assemblyplanar fuel cell assembly and method of manufacturing thereof

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JP2009238597A (ja) 2009-10-15

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