WO2000013243A2 - Verbesserte gasdiffusionselektrode, herstellungsverfahren dazu und verfahren zur hydrophobierung einer gasdiffusionselektrode - Google Patents

Verbesserte gasdiffusionselektrode, herstellungsverfahren dazu und verfahren zur hydrophobierung einer gasdiffusionselektrode Download PDF

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Publication number
WO2000013243A2
WO2000013243A2 PCT/DE1999/002622 DE9902622W WO0013243A2 WO 2000013243 A2 WO2000013243 A2 WO 2000013243A2 DE 9902622 W DE9902622 W DE 9902622W WO 0013243 A2 WO0013243 A2 WO 0013243A2
Authority
WO
WIPO (PCT)
Prior art keywords
gas diffusion
polymer
screen printing
diffusion electrode
electrode
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/DE1999/002622
Other languages
German (de)
English (en)
French (fr)
Other versions
WO2000013243A3 (de
Inventor
Armin Datz
Barbara Schricker
Manfred Waidhas
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens 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 Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to CA2341495A priority Critical patent/CA2341495C/en
Priority to DE59914914T priority patent/DE59914914D1/de
Priority to JP2000571099A priority patent/JP4707834B2/ja
Priority to EP99953556A priority patent/EP1118129B1/de
Publication of WO2000013243A2 publication Critical patent/WO2000013243A2/de
Publication of WO2000013243A3 publication Critical patent/WO2000013243A3/de
Priority to US09/793,411 priority patent/US20010018145A1/en
Anticipated expiration legal-status Critical
Priority to US10/909,219 priority patent/US7682725B2/en
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
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8878—Treatment steps after deposition of the catalytic active composition or after shaping of the electrode being free-standing body
    • H01M4/8892—Impregnation or coating of the catalyst layer, e.g. by an ionomer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8803—Supports for the deposition of the catalytic active composition
    • H01M4/8807—Gas diffusion layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8817—Treatment of supports before application of the catalytic active composition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8825—Methods for deposition of the catalytic active composition
    • H01M4/8828—Coating with slurry or ink
    • H01M4/8835—Screen printing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8878—Treatment steps after deposition of the catalytic active composition or after shaping of the electrode being free-standing body
    • H01M4/8882—Heat treatment, e.g. drying, baking
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90—Selection of catalytic material
    • H01M4/92—Metals of platinum group
    • H01M4/925—Metals of platinum group supported on carriers, e.g. powder carriers
    • H01M4/926—Metals of platinum group supported on carriers, e.g. powder carriers on carbon or graphite
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90—Selection of catalytic material
    • H01M4/92—Metals of platinum group
    • H01M4/928—Unsupported catalytic particles; loose particulate catalytic materials, e.g. in fluidised state
    • 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
    • H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8817—Treatment of supports before application of the catalytic active composition
    • H01M4/8821—Wet proofing
    • 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 invention relates to an improved gas diffusion electrode for use in PEM fuel cells, a method for their production and a method for hydrophobizing a gas diffusion electrode.
  • the core of a PEM fuel cell is a membrane-electrode unit, which is constructed from a membrane with an electrode on both sides, which comprises an electrocatalyst layer.
  • the electrode normally has a solid, gas-permeable and electrically conductive support (e.g. carbon fabric or paper), which is preferably with a polymer suspension (the polymer is called polymer A below, these are polymers such as PTFE ie Polytetrafluoroethylene, Teflon) is hydrophobic.
  • An electrocatalyst layer is applied to this support, which in turn is made hydrophobic again.
  • the polymer A can therefore be contained both in the support and in the electrocatalyst layer.
  • the polymer A content required to make the electrocatalyst layer hydrophobic has hitherto generally been 20-60% by weight, a high content of polymer A, e.g. Teflon, which inhibits the activity of the platinum catalyst, increases the contact resistances and reduces the porosity of the electrode (atanabe, J. Elektroanal. Chem. 195 (1985) 81-83), i.e. adversely affects the system.
  • the polymer A for hydrophobizing the electrocatalyst layer can therefore also be referred to as a "catalyst inhibitor".
  • the electrocatalysts gate layer (20-60% by weight, always based on the content of metallic catalyst)
  • the homogeneity of the thickness of the electrocatalyst layer is also a problem.
  • a wetting agent is added for processing, which must be removed separately and leaves annoying residues.
  • Screen printing is a well known technique for producing a uniformly thin layer.
  • the use of screen printing for the construction of an electrochemical system is already known.
  • the screen printing paste which contains teflon dispersion, graphite and platinum black, must again have more than 50% by weight of the wetting or dispersing agent for stabilization. by means of "Triton X 100".
  • the Teflon portion used for the hydrophobization in the screen printing paste and thus that contained in the resulting electrocatalyst layer is approx. 25% by weight.
  • the paste is printed on a solid support, for example carbon paper, which again contains 60% by weight % Teflon contains.
  • the total Teflon content is approximately 85%.
  • a disadvantage of the electrode produced using this method is, apart from this extremely high content of polymer A for hydrophobizing the electrocatalyst layer (here: Teflon), that in more than 50% % By weight (of the catalyst paste) added wetting agent.
  • the object of the invention is to disclose a gas diffusion electrode with an electrocatalyst layer which, for improvement over the prior art with a homogeneous layer thickness, contains the lowest possible amount of polymer A for hydrophobization without wetting agent, and a process for its production. It is also an object of the invention to provide a cost-effective and mass-production process for hydrophobizing a gas diffusion electrode. Finally, it is an object of the invention to disclose the use of such a gas diffusion electrode.
  • the invention relates to a gas diffusion electrode for a PEM fuel cell with an electrocatalyst layer which has a content of polymer A for water repellency of less than or equal to 10% by weight and a uniform thickness of the electrocatalyst layer of less than or equal to 20 ⁇ m.
  • the invention also relates to a gas diffusion electrode which, by means of a screen printing process with a screen printing paste, has a polymer A content for hydrophobicizing the electrocatalyst layer of at most 10% by weight (based on the content of metallic catalyst), at least one metallic catalyst and a high-boiling solvent.
  • the invention also relates to a method for producing a gas diffusion electrode, in which a catalyst paste, which comprises at least one metallic catalyst and a screen printing medium, is printed onto an electrode and / or a membrane in the screen printing process and the screen printing medium is passed through in a subsequent, second step Heating is removed.
  • a method for hydrophobizing a gas diffusion electrode in which a fully coated electrode is immersed in a solution of polymer A for hydrophobization.
  • Use of a gas diffusion electrode according to the invention in a fuel cell is also the subject of the invention.
  • the electrocatalyst layer and / or the screen printing paste (based on their metallic catalyst content) contains only 0.01 to 1% by weight, preferably 0.05 to 0.5% by weight and particularly preferably 0.075 to 0, 2% by weight and in particular 0.1% by weight of polymer A for hydrophobizing the electrocatalyst layer.
  • polymer A is hydrophobic for the electrocatalyst layer Teflon, in particular an amorphous modification of Teflon, which can be brought into solution.
  • Platinum black or platinum on carbon is preferably used as the metallic catalyst.
  • An ester and / or a ketone and / or an alcohol is preferably used as the high-boiling solvent for the screen printing and / or catalyst paste.
  • a polymer B preferably a polymer which can be heated up to 400 ° C., is added to the catalyst paste as a binder.
  • the content of polymer A in the electrocatalyst layer for hydrophobizing the electrocatalyst layer goes to zero, zero being excluded.
  • the finished electrocatalyst layer is subsequently rendered hydrophobic by immersing the entire electrode in a solution of polymer A for hydrophobization after the screen printing coating.
  • the solution contains the polymer A preferably in 0.01 to 1% by weight, particularly preferably 0.05 to 0.5% by weight and very particularly preferably 0.075 to 0.2% by weight, in particular 0.1% by weight.
  • the solvent is preferably a perfluorinated solvent such as a fully fluorinated organic compound, e.g. can be produced via the electrochemical fluorination of alkanes.
  • the electrode is dried in a further working step, preferably at temperatures between 20 ° C. and 120 ° C.
  • a carbon paste consisting of electrically conductive carbon black and screen printing medium is first printed on the carrier to fill up the large pores and thus to reduce the amount of catalyst required for complete coating. This creates a very first screen print coating of the carrier with carbon. Only after this first screen printing coating has dried the screen printing is carried out with the - much more expensive - catalyst paste.
  • both the carbon paste of the first screen printing process and the carrier or both can additionally contain polymer A.
  • the total content of polymer A in the gas diffusion electrode is conceptually separated from the critical content of "polymer A for hydrophobicizing the electrocatalyst layer", because the term mentioned only means the amount of polymer A which is due to the immersion bath and / or via the screen printing paste
  • the total content of polymer A in the gas diffusion electrode advantageously adds up to 20% by weight, preferably less than 15% by weight. and particularly preferably to less than 10% by weight, very particularly preferably to less than 5% by weight and in particular to less than 3.5% by weight.
  • Teflon is preferably used as polymer A, in particular a modification which is amorphous and / or transparent and can be completely dissolved in fluorinated solvents.
  • another polymer e.g. Ethylene-propylene copolymer or another fluorine-containing polymer, e.g. PVDF (polyvinylidene fluoride) can be used.
  • the electrocatalyst layer here is the layer which is preferably applied to a solid, gas-permeable and electrically conductive support of the electrode and on the catalytic surface of which the anodic oxidation of the fuel to protons or the cathodic reduction of oxygen takes place.
  • the electrocatalyst layer comprises at least the metallic catalyst, which is preferred contains platinum, which can be used in pure form as platinum black or in dilute form as platinum on carbon in the catalyst paste.
  • the electrocatalyst layer preferably contains no further constituents because, in accordance with the preferred embodiment of the invention, the screen printing medium which is added to the catalyst paste for processing has been removed by drying and heating the finished, ie coated, electrode.
  • the screen printing paste (also called carbon or catalyst paste, depending on the working step) is at least a high-boiling solvent as a screen printing medium, e.g. an ester, ketone and / or an alcohol, in particular butyl glycolate, cyclohexanone and / or terpineol, are added.
  • a high-boiling solvent e.g. an ester, ketone and / or an alcohol, in particular butyl glycolate, cyclohexanone and / or terpineol
  • a polymer B such as e.g. Polyvinyl alcohol and / or polyethylene oxide added.
  • the polymer B can preferably be baked out, in particular at temperatures up to 400 ° C., or only leaves residues which do not interfere with fuel cell operation.
  • the electrode is a gas permeable, electrically conductive
  • Layer on the membrane which preferably comprises a support with an electrocatalyst layer.
  • a carbon fabric or carbon paper or another porous and electrically conductive substrate is preferably used as the carrier or substrate.
  • the coal or catalyst powder is added with stirring to a screen printing medium consisting of, for example, polyethylene oxide dissolved in terpineol.
  • the binder content is 0 to 20% by weight, preferably 5 to 15% by weight.
  • Platinum black or platinum on carbon is used as the catalyst.
  • the screen printing is carried out with a commercially available screen printing machine. Stainless steel sieves up to size 760 * 700 mm 2 with a mesh size of 100 to 300 meshes per inch (approx. 39 to 118 meshes per cm) are used. This enables wet film thicknesses of 6 to 60 ⁇ m to be achieved per printing process. Practically any surface, limited by the size of the printable surface of the screen printing machine, is coated per printing process.
  • the electrodes are then dried at 120 ° C after the printing process and heated to 360 ° C to remove the binder.
  • platinum occupancy is the case of pure platinum black catalyst as 2-3 mg / cm 2 and platinum on carbon as a catalyst depending on the platinum loading of coal from 0.15 to 0, 4 mg / cm 2.
  • the completely coated gas diffusion electrode is immersed in a solution of a polymer A for hydrophobizing the electrocatalyst layer and then dried. Any gas diffusion electrode can be subsequently hydrophobized in this way.
  • the present method by means of screen printing makes it possible to significantly reduce the costs for the electrode production.
  • a uniform layer thickness is achieved over the entire electrode even with large electrodes (eg 36 * 36 cm 2 ) and good reproducibility in mass production. Since the water repellency, if at all, only takes place at the end of the process by soaking the entire electrode in a solution of polymer A, the processing properties (and the burnout behavior) of the screen printing pastes are not impaired by the polymer suspension and additional wetting and dispersing agents which tend to coagulate and / or foam.
  • the electrocatalyst layer advantageously contains only 0.01 to 0.5% by weight, preferably 0.05 to 0.3% by weight and particularly preferably 0.075 to 0.2% by weight and in particular 0.1% by weight, of polymer A for hydrophobicization the electrocatalyst layer instead of the previous 20 - 60% by weight. This largely prevents the gas pores from becoming blocked by polymer A agglomerates in the electrocatalyst layer and / or in the support.
  • the invention replaces the previous hydrophobization technology in gas diffusion electrodes of fuel cells.
  • polymer A which is a catalyst inhibitor
  • the fully coated electrode is immersed in a hydrophobic bath.
  • the special advantage of this gas diffusion electrode is, in addition to the low polymer A content, the improved homogeneity the layer thickness because the electrocatalyst paste is easier to process in a screen printing process without the addition of polymer A.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Composite Materials (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Inert Electrodes (AREA)
  • Printing Methods (AREA)
  • Fuel Cell (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
PCT/DE1999/002622 1998-08-26 1999-08-20 Verbesserte gasdiffusionselektrode, herstellungsverfahren dazu und verfahren zur hydrophobierung einer gasdiffusionselektrode Ceased WO2000013243A2 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA2341495A CA2341495C (en) 1998-08-26 1999-08-20 Gas diffusion electrode and method for its production
DE59914914T DE59914914D1 (de) 1998-08-26 1999-08-20 Gasdiffusionselektrode und verfahren zu deren herstellung
JP2000571099A JP4707834B2 (ja) 1998-08-26 1999-08-20 改良されたガス拡散電極、その製造方法及びガス拡散電極の疎水化方法
EP99953556A EP1118129B1 (de) 1998-08-26 1999-08-20 Gasdiffusionselektrode und verfahren zu deren herstellung
US09/793,411 US20010018145A1 (en) 1998-08-26 2001-02-26 Gas diffusion electrode and method for its production
US10/909,219 US7682725B2 (en) 1998-08-26 2004-07-30 Gas diffusion electrode and method for its production

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19838786 1998-08-26
DE19838786.5 1998-08-26

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/793,411 Continuation US20010018145A1 (en) 1998-08-26 2001-02-26 Gas diffusion electrode and method for its production

Publications (2)

Publication Number Publication Date
WO2000013243A2 true WO2000013243A2 (de) 2000-03-09
WO2000013243A3 WO2000013243A3 (de) 2000-08-10

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PCT/DE1999/002622 Ceased WO2000013243A2 (de) 1998-08-26 1999-08-20 Verbesserte gasdiffusionselektrode, herstellungsverfahren dazu und verfahren zur hydrophobierung einer gasdiffusionselektrode
PCT/DE1999/002620 Ceased WO2000013242A2 (de) 1998-08-26 1999-08-20 Siebdruckverfahren zur herstellung einer gasdiffusionselektrode

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/002620 Ceased WO2000013242A2 (de) 1998-08-26 1999-08-20 Siebdruckverfahren zur herstellung einer gasdiffusionselektrode

Country Status (9)

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US (2) US20010018145A1 (enExample)
EP (2) EP1118129B1 (enExample)
JP (2) JP4707834B2 (enExample)
CN (2) CN1195336C (enExample)
AT (2) ATE415713T1 (enExample)
CA (2) CA2341495C (enExample)
DE (2) DE59914914D1 (enExample)
ES (2) ES2214895T3 (enExample)
WO (2) WO2000013243A2 (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002313359A (ja) * 2001-04-17 2002-10-25 Mitsubishi Heavy Ind Ltd 固体高分子型燃料電池
EP1347527A3 (de) * 2002-03-14 2005-06-01 DaimlerChrysler AG Membran-Elektroden-Einheit (MEA) mit hydrophober Zwischenschicht

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7041191B2 (en) * 2004-05-27 2006-05-09 Institute Of Nuclear Energy Research Method for manufacturing membrane electrode assembly of fuel cell by printing processes
KR100717130B1 (ko) 2005-09-30 2007-05-11 한국과학기술연구원 고체산화물 연료전지용 페이스트, 이를 이용한 연료극지지형 고체산화물 연료전지 및 그 제조 방법
KR101233343B1 (ko) * 2005-11-25 2013-02-14 삼성에스디아이 주식회사 연료 전지용 막-전극 어셈블리, 이의 제조 방법 및 이를포함하는 연료 전지 시스템
US20070141446A1 (en) * 2005-12-15 2007-06-21 Hollingsworth & Vose Company Fuel cell gas diffusion articles
KR100668354B1 (ko) * 2006-02-07 2007-01-12 삼성에스디아이 주식회사 금속 촉매와 이를 포함한 전극의 제조방법
JP5298405B2 (ja) 2006-04-14 2013-09-25 トヨタ自動車株式会社 燃料電池用膜電極接合体の製造方法
KR100957302B1 (ko) * 2007-09-07 2010-05-12 현대자동차주식회사 연료전지용 막-전극 접합체의 제조방법
MX2010005814A (es) * 2007-11-27 2010-10-28 3Gsolar Ltd Celdas colorantes de gran área y métodos de producción de las mismas.
US20100028744A1 (en) * 2008-08-04 2010-02-04 Gm Global Technology Operations, Inc. Gas diffusion layer with lower gas diffusivity
US20100028750A1 (en) * 2008-08-04 2010-02-04 Gm Global Technology Operations, Inc. Gas diffusion layer with lower gas diffusivity
US7947410B2 (en) * 2008-08-22 2011-05-24 Toyota Motor Engineering & Manufacturing North America, Inc. Fuel cell electrodes with triazole modified polymers and membrane electrode assemblies incorporating same
WO2011100602A1 (en) * 2010-02-12 2011-08-18 Revolt Technology Ltd. Manufacturing methods for air electrode
JP6075743B2 (ja) * 2010-08-03 2017-02-08 ソニー株式会社 信号処理装置および方法、並びにプログラム
JP5530954B2 (ja) * 2011-02-21 2014-06-25 株式会社日本自動車部品総合研究所 燃料電池
CN104527247B (zh) * 2014-01-03 2017-03-22 华东理工大学 基于丝网印刷技术的微流体燃料电池组微电路制备方法
CN107342423B (zh) * 2017-05-22 2020-09-01 深圳市航盛新材料技术有限公司 空气电极极片及其制备方法和空气电池
US11761100B2 (en) 2018-11-06 2023-09-19 Utility Global, Inc. Electrochemical device and method of making
US11611097B2 (en) 2018-11-06 2023-03-21 Utility Global, Inc. Method of making an electrochemical reactor via sintering inorganic dry particles
US11603324B2 (en) 2018-11-06 2023-03-14 Utility Global, Inc. Channeled electrodes and method of making
US11539053B2 (en) 2018-11-12 2022-12-27 Utility Global, Inc. Method of making copper electrode
JP2022512964A (ja) 2018-11-06 2022-02-07 ユティリティ グローバル，インコーポレイテッド 燃料電池を製造し、その構成要素を処理する方法
CN110416558B (zh) * 2019-07-16 2020-10-16 成都新柯力化工科技有限公司 一种卷对卷稳定连续印刷制备燃料电池膜电极的方法
CN118248893B (zh) * 2024-02-06 2025-09-26 厦门金龙联合汽车工业有限公司 一种石墨极板的表面改性方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912538A (en) * 1974-01-15 1975-10-14 United Technologies Corp Novel composite fuel cell electrode
US4229490A (en) * 1978-09-01 1980-10-21 Texas Instruments Incorporated Novel method for catalyst application to a substrate for fuel cell electrodes
IL61410A0 (en) * 1979-11-09 1980-12-31 Yardney Electric Corp Improved inexpensive electrode for metal-air cells and method of making the same
US4615954A (en) * 1984-09-27 1986-10-07 Eltech Systems Corporation Fast response, high rate, gas diffusion electrode and method of making same
US4568442A (en) * 1985-02-01 1986-02-04 The Dow Chemical Company Gas diffusion composite electrode having polymeric binder coated carbon layer
DE3722019A1 (de) * 1987-07-03 1989-01-12 Varta Batterie Verfahren zur herstellung einer kunststoffgebundenen gasdiffusionselektrode, die einen manganoxidkatalysator der ueberwiegenden zusammensetzung mno(pfeil abwaerts)2(pfeil abwaerts)o(pfeil abwaerts)3(pfeil abwaerts)* x mn(pfeil abwaerts)5(pfeil abwaerts)o(pfeil abwaerts)8(pfeil abwaerts) enthaelt
US4927514A (en) * 1988-09-01 1990-05-22 Eltech Systems Corporation Platinum black air cathode, method of operating same, and layered gas diffusion electrode of improved inter-layer bonding
JP2948376B2 (ja) * 1991-10-15 1999-09-13 三菱重工業株式会社 反応膜の製造方法及び電気化学セルの製造方法
JP2842150B2 (ja) * 1992-06-02 1998-12-24 株式会社日立製作所 固体高分子型燃料電池
EP0641033B1 (de) * 1993-08-31 1999-03-31 Compur Monitors Sensor Technology GmbH Verfahren zur Herstellung katalytisch wirksamer Gasdiffusionselektroden für elektrochemische Zellen
JPH07130376A (ja) * 1993-11-03 1995-05-19 Tokyo Gas Co Ltd 固体高分子型燃料電池用電極の触媒処理法
JP2741574B2 (ja) * 1994-09-19 1998-04-22 株式会社日立製作所 固体高分子電解質型燃料電池
JP3827018B2 (ja) * 1995-03-20 2006-09-27 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー 無機充填材含有膜および膜と電極のアセンブリおよびそれを利用した電気化学セル
JPH09223503A (ja) * 1996-02-14 1997-08-26 Tanaka Kikinzoku Kogyo Kk 高分子固体電解質型燃料電池用電極の製造方法
US6103077A (en) * 1998-01-02 2000-08-15 De Nora S.P.A. Structures and methods of manufacture for gas diffusion electrodes and electrode components
GB9808524D0 (en) * 1998-04-23 1998-06-17 British Gas Plc Fuel cell flow-field structure formed by layer deposition

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002313359A (ja) * 2001-04-17 2002-10-25 Mitsubishi Heavy Ind Ltd 固体高分子型燃料電池
EP1347527A3 (de) * 2002-03-14 2005-06-01 DaimlerChrysler AG Membran-Elektroden-Einheit (MEA) mit hydrophober Zwischenschicht

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CN1173426C (zh) 2004-10-27
EP1118130B1 (de) 2004-01-07
EP1118129A2 (de) 2001-07-25
JP4707834B2 (ja) 2011-06-22
ES2214895T3 (es) 2004-09-16
ATE257621T1 (de) 2004-01-15
CN1195336C (zh) 2005-03-30
CA2341494A1 (en) 2000-03-09
CA2341495C (en) 2010-07-06
ATE415713T1 (de) 2008-12-15
WO2000013242A3 (de) 2000-06-08
CN1324502A (zh) 2001-11-28
DE59914914D1 (de) 2009-01-08
EP1118130A2 (de) 2001-07-25
US20020022083A1 (en) 2002-02-21
US20010018145A1 (en) 2001-08-30
WO2000013242A2 (de) 2000-03-09
CN1328707A (zh) 2001-12-26
US6645660B2 (en) 2003-11-11
JP2002525811A (ja) 2002-08-13
JP2002525812A (ja) 2002-08-13
DE59908263D1 (de) 2004-02-12
ES2315020T3 (es) 2009-03-16
JP4792160B2 (ja) 2011-10-12
EP1118129B1 (de) 2008-11-26
CA2341494C (en) 2010-06-01
CA2341495A1 (en) 2000-03-09

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