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DE3786943D1 - Gasdurchlaessige elektrode. - Google Patents

Gasdurchlaessige elektrode.

Info

Publication number
DE3786943D1
DE3786943D1 DE8787830085T DE3786943T DE3786943D1 DE 3786943 D1 DE3786943 D1 DE 3786943D1 DE 8787830085 T DE8787830085 T DE 8787830085T DE 3786943 T DE3786943 T DE 3786943T DE 3786943 D1 DE3786943 D1 DE 3786943D1
Authority
DE
Germany
Prior art keywords
gas permeable
permeable electrode
electrode
gas
permeable
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.)
Expired - Fee Related
Application number
DE8787830085T
Other languages
English (en)
Other versions
DE3786943T2 (de
Inventor
Masahiro Watanabe
Satoshi Motoo
Nagakazu Furuya
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.)
Tanaka Kikinzoku Kogyo KK
Original Assignee
Tanaka Kikinzoku Kogyo KK
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
Priority claimed from JP61050018A external-priority patent/JPH0665036B2/ja
Priority claimed from JP61075238A external-priority patent/JPS62232862A/ja
Priority claimed from JP61076891A external-priority patent/JPH07118322B2/ja
Application filed by Tanaka Kikinzoku Kogyo KK filed Critical Tanaka Kikinzoku Kogyo KK
Publication of DE3786943D1 publication Critical patent/DE3786943D1/de
Application granted granted Critical
Publication of DE3786943T2 publication Critical patent/DE3786943T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88Processes of manufacture
    • H01M4/8803Supports for the deposition of the catalytic active composition
    • H01M4/8807Gas diffusion layers
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/02Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
    • C25B11/03Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
    • C25B11/031Porous electrodes
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25CPROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C1/00Electrolytic production, recovery or refining of metals by electrolysis of solutions
    • C25C1/16Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88Processes of manufacture
    • H01M4/8825Methods for deposition of the catalytic active composition
    • H01M4/8846Impregnation
    • H01M4/885Impregnation followed by reduction of the catalyst salt precursor
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/08Fuel cells with aqueous electrolytes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/10Fuel cells with solid electrolytes
    • H01M8/1007Fuel cells with solid electrolytes with both reactants being gaseous or vaporised
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/10Fuel cells with solid electrolytes
    • H01M8/1009Fuel cells with solid electrolytes with one of the reactants being liquid, solid or liquid-charged
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/86Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88Processes of manufacture
    • H01M4/8878Treatment steps after deposition of the catalytic active composition or after shaping of the electrode being free-standing body
    • H01M4/8896Pressing, rolling, calendering
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/10Fuel cells with solid electrolytes
    • H01M8/1004Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inert Electrodes (AREA)
DE87830085T 1986-03-07 1987-03-05 Gasdurchlässige Elektrode. Expired - Fee Related DE3786943T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP61050018A JPH0665036B2 (ja) 1986-03-07 1986-03-07 ガス拡散電極及びその製造方法
JP61075238A JPS62232862A (ja) 1986-04-01 1986-04-01 ガス拡散電極
JP61076891A JPH07118322B2 (ja) 1986-04-03 1986-04-03 ガス拡散電極

Publications (2)

Publication Number Publication Date
DE3786943D1 true DE3786943D1 (de) 1993-09-16
DE3786943T2 DE3786943T2 (de) 1994-03-17

Family

ID=27293810

Family Applications (1)

Application Number Title Priority Date Filing Date
DE87830085T Expired - Fee Related DE3786943T2 (de) 1986-03-07 1987-03-05 Gasdurchlässige Elektrode.

Country Status (3)

Country Link
US (1) US4931168A (de)
EP (1) EP0241432B1 (de)
DE (1) DE3786943T2 (de)

Families Citing this family (77)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4877694A (en) * 1987-05-18 1989-10-31 Eltech Systems Corporation Gas diffusion electrode
US5234768A (en) * 1988-02-10 1993-08-10 Tanaka Kikinzoku Kogyo K.K. Gas permeable member
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
EP0410946B1 (de) * 1989-07-24 1994-05-04 Tanaka Kikinzoku Kogyo K.K. Zersetzung von Schadstoffen
JPH03183943A (ja) * 1989-12-14 1991-08-09 Hitachi Ltd 酸素センサ
US5232561A (en) * 1989-12-15 1993-08-03 Tanaka Kikinzoku Kogyo K.K. Electrolytic method of preparing compounds with a gas permeable electrode
US5480735A (en) * 1990-06-25 1996-01-02 International Fuel Cells Corporation High current alkaline fuel cell electrodes
US5217821A (en) * 1990-06-25 1993-06-08 International Fuel Cells Corporation High current acid fuel cell electrodes
JPH04162365A (ja) * 1990-10-25 1992-06-05 Tanaka Kikinzoku Kogyo Kk 燃料電池用電極の作製法
US5211984A (en) * 1991-02-19 1993-05-18 The Regents Of The University Of California Membrane catalyst layer for fuel cells
DE4120679C2 (de) * 1991-06-22 1995-11-09 Grimma Masch Anlagen Gmbh Elektrolyseverfahren und Elektrolysezelle für gasentwickelnde oder gasverbrauchende elektrolytische Prozesse
US5618392A (en) * 1991-10-31 1997-04-08 Tanaka Kikinzoku Kogyo K.K. Gas diffusion electrode
CA2077474A1 (en) * 1992-02-21 1993-08-22 Carl W. Townsend Dual porosity gas evolving electrode
JP3245929B2 (ja) * 1992-03-09 2002-01-15 株式会社日立製作所 燃料電池及びその応用装置
US5282935A (en) * 1992-04-13 1994-02-01 Olin Corporation Electrodialytic process for producing an alkali solution
US5273635A (en) * 1992-06-04 1993-12-28 Thermacore, Inc. Electrolytic heater
GB9213124D0 (en) * 1992-06-20 1992-08-05 Johnson Matthey Plc High performance electrode
FR2693315B1 (fr) * 1992-07-06 1994-09-16 Sorapec Pile à combustible.
US5599638A (en) * 1993-10-12 1997-02-04 California Institute Of Technology Aqueous liquid feed organic fuel cell using solid polymer electrolyte membrane
US6703150B2 (en) * 1993-10-12 2004-03-09 California Institute Of Technology Direct methanol feed fuel cell and system
EP1291950A3 (de) * 1994-10-18 2005-07-20 University Of Southern California Organische Brennstoffzelle und Verfahren zum Betrieb der Zelle
USRE37307E1 (en) 1994-11-14 2001-08-07 W. L. Gore & Associates, Inc. Ultra-thin integral composite membrane
US6254978B1 (en) * 1994-11-14 2001-07-03 W. L. Gore & Associates, Inc. Ultra-thin integral composite membrane
US6054230A (en) * 1994-12-07 2000-04-25 Japan Gore-Tex, Inc. Ion exchange and electrode assembly for an electrochemical cell
US5728485A (en) * 1995-03-15 1998-03-17 Tanaka Kikinzoku Kogyo K.K. Electrode for polymer electrolyte electrochemical cell and process of preparing same
US5631099A (en) * 1995-09-21 1997-05-20 Hockaday; Robert G. Surface replica fuel cell
US5759712A (en) * 1997-01-06 1998-06-02 Hockaday; Robert G. Surface replica fuel cell for micro fuel cell electrical power pack
JP2001513697A (ja) 1997-02-24 2001-09-04 スーペリア マイクロパウダーズ リミテッド ライアビリティ カンパニー エアロゾル法及び装置、粒子製品、並びに該粒子製品から製造される電子装置
JP3583897B2 (ja) * 1997-04-11 2004-11-04 三洋電機株式会社 燃料電池
US6635384B2 (en) * 1998-03-06 2003-10-21 Gore Enterprise Holdings, Inc. Solid electrolyte composite for electrochemical reaction apparatus
US6326097B1 (en) 1998-12-10 2001-12-04 Manhattan Scientifics, Inc. Micro-fuel cell power devices
US6194095B1 (en) 1998-12-15 2001-02-27 Robert G. Hockaday Non-bipolar fuel cell stack configuration
US6632557B1 (en) 1999-10-26 2003-10-14 The Gillette Company Cathodes for metal air electrochemical cells
JP2003515236A (ja) 1999-11-17 2003-04-22 ネア・パワー・システムズ・インコーポレイテッド シリコン基板および/またはゾルゲル法で誘導された担体構造を有する燃料電池
JP2003529195A (ja) 2000-03-28 2003-09-30 マンハッタン・サイエンティフィックス・インコーポレイテッド 燃料電池装置とその動作方法
US6630266B2 (en) 2000-03-30 2003-10-07 Manhattan Scientifics, Inc. Diffusion fuel ampoules for fuel cells
WO2001094668A1 (fr) * 2000-06-06 2001-12-13 Toagosei Co., Ltd. Electrode a diffusion gazeuse, procede de fabrication similaire et pile a combustible l'utilisant
FR2819639A1 (fr) * 2001-01-17 2002-07-19 Sorapec Nouvelles structures de couche active pour electrodes de pile a combustible a electrolyte solide polymere
TWI276242B (en) * 2001-03-08 2007-03-11 Sony Corp Gas diffusive electrode body, method of manufacturing the electrode body, and electrochemical device
US6632553B2 (en) * 2001-03-27 2003-10-14 Mti Microfuel Cells, Inc. Methods and apparatuses for managing effluent products in a fuel cell system
DE10130441B4 (de) * 2001-06-23 2005-01-05 Uhde Gmbh Verfahren zum Herstellen von Gasdiffusionselektroden
US6613203B1 (en) 2001-09-10 2003-09-02 Gore Enterprise Holdings Ion conducting membrane having high hardness and dimensional stability
US7524528B2 (en) * 2001-10-05 2009-04-28 Cabot Corporation Precursor compositions and methods for the deposition of passive electrical components on a substrate
US20060159838A1 (en) * 2005-01-14 2006-07-20 Cabot Corporation Controlling ink migration during the formation of printable electronic features
US7732002B2 (en) 2001-10-19 2010-06-08 Cabot Corporation Method for the fabrication of conductive electronic features
US6981877B2 (en) * 2002-02-19 2006-01-03 Mti Microfuel Cells Inc. Simplified direct oxidation fuel cell system
US6808838B1 (en) * 2002-05-07 2004-10-26 The Regents Of The University Of California Direct methanol fuel cell and system
US7229712B2 (en) * 2003-03-07 2007-06-12 Microcell Corporation Fuel cell structures and assemblies
US7407721B2 (en) * 2003-04-15 2008-08-05 Mti Microfuel Cells, Inc. Direct oxidation fuel cell operating with direct feed of concentrated fuel under passive water management
US7282293B2 (en) * 2003-04-15 2007-10-16 Mti Microfuel Cells Inc. Passive water management techniques in direct methanol fuel cells
US7244526B1 (en) * 2003-04-28 2007-07-17 Battelle Memorial Institute Solid oxide fuel cell anodes and electrodes for other electrochemical devices
US6967039B2 (en) * 2003-07-28 2005-11-22 General Motors Corporation Untreated diffusion media with mesoporous layer and devices incorporating the same
US7220513B2 (en) * 2004-03-18 2007-05-22 General Motors Corporation Balanced humidification in fuel cell proton exchange membranes
US7241474B2 (en) * 2004-04-14 2007-07-10 General Motors Corporation Preparation of patterned diffusion media
US7250189B2 (en) * 2004-08-05 2007-07-31 General Motors Corporation Increasing the hydrophilicity of carbon fiber paper by electropolymerization
US8241818B2 (en) * 2004-08-06 2012-08-14 GM Global Technology Operations LLC Diffusion media with hydrophobic and hydrophilic properties
WO2006076606A2 (en) 2005-01-14 2006-07-20 Cabot Corporation Optimized multi-layer printing of electronics and displays
US7533361B2 (en) 2005-01-14 2009-05-12 Cabot Corporation System and process for manufacturing custom electronics by combining traditional electronics with printable electronics
US7824466B2 (en) 2005-01-14 2010-11-02 Cabot Corporation Production of metal nanoparticles
WO2006076609A2 (en) 2005-01-14 2006-07-20 Cabot Corporation Printable electronic features on non-uniform substrate and processes for making same
AU2006204813A1 (en) * 2005-01-14 2006-07-20 Cabot Corporation Security features, their use, and processes for making them
US8383014B2 (en) 2010-06-15 2013-02-26 Cabot Corporation Metal nanoparticle compositions
WO2006076615A1 (en) * 2005-01-14 2006-07-20 Cabot Corporation Ink-jet printing of compositionally no-uniform features
TW200640596A (en) 2005-01-14 2006-12-01 Cabot Corp Production of metal nanoparticles
US20070092784A1 (en) * 2005-10-20 2007-04-26 Dopp Robert B Gas diffusion cathode using nanometer sized particles of transition metals for catalysis
US20080280190A1 (en) * 2005-10-20 2008-11-13 Robert Brian Dopp Electrochemical catalysts
US20070218344A1 (en) * 2006-03-20 2007-09-20 Chunxin Ji Diffusion media with vapor deposited fluorocarbon polymer
US7955755B2 (en) * 2006-03-31 2011-06-07 Quantumsphere, Inc. Compositions of nanometal particles containing a metal or alloy and platinum particles
US20070227300A1 (en) * 2006-03-31 2007-10-04 Quantumsphere, Inc. Compositions of nanometal particles containing a metal or alloy and platinum particles for use in fuel cells
DE102006061225A1 (de) * 2006-12-20 2008-06-26 Forschungszentrum Jülich GmbH Verfahren zur elektrochemischen Aktivierung von Brennstoffzellen
ES2539704T3 (es) 2010-12-15 2015-07-03 Basf Se Procedimiento de fluoración electroquímica de compuestos orgánicos
EP2861785A2 (de) 2012-06-15 2015-04-22 Basf Se Anodische oxidation organischer substrate in gegenwart von nukleophilen
EP2985364A1 (de) 2014-08-14 2016-02-17 Basf Se Verfahren zur Herstellung von Alkoholen durch elektrochemische reduktive Kopplung
CN106521544B (zh) * 2015-09-15 2018-07-13 中国科学院大连化学物理研究所 二氧化碳电化学还原用多孔电极复合体及其制备和应用
JP6567584B2 (ja) 2017-03-16 2019-08-28 株式会社東芝 電気化学反応装置
EP3748040A1 (de) 2019-06-04 2020-12-09 Basf Se Elektrochemische weichmachersynthese
AU2021289475A1 (en) * 2020-06-11 2023-01-19 Verdox, Inc. Electroswing adsorption cell with patterned electrodes for separation of gas components

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3203834A (en) * 1961-07-26 1965-08-31 Leesona Corp Fuel cell
US3386859A (en) * 1964-11-04 1968-06-04 Union Oil Co Porous electrode comprising hydrophobic binder and hydrophilic material incorporated therein and method of fabricating same
GB1127955A (en) * 1966-02-14 1968-09-25 Matsushita Electric Ind Co Ltd Gas diffusion electrode for cells
DE2208632C3 (de) * 1972-02-24 1981-07-30 Battelle-Institut E.V., 6000 Frankfurt Verfahren zur Herstellung von kohlehaltigen Gaselektroden mit hydrophober Rückschicht
GB1392353A (en) * 1972-04-11 1975-04-30 Zlehit Pri Ban Gasdiffusion electrode
US3956014A (en) * 1974-12-18 1976-05-11 United Technologies Corporation Precisely-structured electrochemical cell electrode and method of making same
NL7502842A (nl) * 1975-03-11 1976-09-14 Stamicarbon Poreuze elektrode.
US4444852A (en) * 1982-08-27 1984-04-24 The United States Of America As Represented By The United States Department Of Energy Size and weight graded multi-ply laminar electrodes
JPS59209278A (ja) * 1983-05-13 1984-11-27 Hitachi Ltd 燃料電池
JPS6065466A (ja) * 1983-09-20 1985-04-15 Fuji Electric Corp Res & Dev Ltd 燃料電池用ガス拡散電極
JPS60133661A (ja) * 1983-12-21 1985-07-16 Fuji Electric Corp Res & Dev Ltd 燃料電池の電極製造方法
JPS6124149A (ja) * 1984-07-13 1986-02-01 Hitachi Ltd 液体燃料電池の燃料極基体
US4615954A (en) * 1984-09-27 1986-10-07 Eltech Systems Corporation Fast response, high rate, gas diffusion electrode and method of making same
US4610938A (en) * 1985-07-24 1986-09-09 Electric Power Research Institute Acid fuel cell
JPH0766812B2 (ja) * 1985-07-24 1995-07-19 政廣 渡辺 燃料電池等のガス拡散電極
JPS62103977A (ja) * 1985-10-30 1987-05-14 Hitachi Ltd 燃料電池
JPS62165863A (ja) * 1986-01-14 1987-07-22 Tanaka Kikinzoku Kogyo Kk ガス拡散電極とその製造方法

Also Published As

Publication number Publication date
EP0241432A3 (en) 1988-12-14
EP0241432A2 (de) 1987-10-14
DE3786943T2 (de) 1994-03-17
EP0241432B1 (de) 1993-08-11
US4931168A (en) 1990-06-05

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee