• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    ELECTRODE ELECTROCHEMICAL GENERATOR containing one carrier layer and one active catalytic layer with hydrophobic properties, characterized in that, in order to increase service life by increasing elasticity, the electrode thickness is 105-300 microns with an active and carrier thickness of 5-100, respectively. and tOO-200 microns, with the porosity of the electrode being 10-80%, each layer contains 60-99% by weight of a binder selected from the group consisting of polytetrafluoroethylene and polyvinyl chloride, and 1-40% by weight of an electrically conductive substance selected from the groups Contains carbon powder, carbon fiber and graphite, and the current collection is high in the form of points or lines with an interval of 1 mm on the base layer and a collector in contact with them.
    公开号:SU1083928A3
    申请号:SU802995901
    申请日:1980-10-17
    公开日:1984-03-30
    发明作者:Варшавски Бернар
    申请人:Сосьете Женераль Де Констрюксьон Электрик Э Меканик "Альстом Э Ко" (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to chemical current sources and relates to an electrolytic electrochemical generator. Electrode generator electrodes are known that contain a catalytic layer that is completely wettable and a hydrophobic porous barrier layer that prevents electrolyte from penetrating into the pores, allowing the gaseous reagent to diffuse to the catalytic layer and providing current. However, if the content of the hydrophobic material in the barrier layer is high, the electronic conductivity is low, and if the content is Because of this little material, the hydrophobic nature is insufficient, which leads to a relatively rapid penetration of electrolyte and, consequently, a decrease in service life. An electrode of an electrochemical generator is also known, containing one carrier layer and one active catalytic layer having a hydrophobicity of 2. However, the known electrode is not sufficiently strong. The purpose of the invention is to increase the lifetime of the electrode by increasing the elasticity of the electrode. The goal is achieved by the fact that in an electrode containing one carrier layer and one active, catalytic layer with hydrophobicity, the electrode thickness is 105-300 microns with a thickness of the active and carrier layers, respectively, 5-100 and 100-200 microns, and the porosity of the electrode 10-80%, each layer contains 60-99% by weight of a binder selected from the group consisting of polytetrafluoroethylene (PTFE) and polyvinyl chloride (PVC), and 1-40% by weight of an electrically conductive substance selected from the group containing powdered carbon, carbon fiber and graphite, and osem is in the form of dots or lines with intervals of 1 mm on a carrier layer and contacting the collector them. The table presents the values of tensile strain as a criterion for the elasticity of the proposed electrode. The proposed electrodes, eliminating the disadvantages of the known elect. It consists of two layers, namely a carrier and an active or catalytic layer with a total length of less than a millimeter, and use E in these two layers, each of which consists mainly of a binding agent and crushed coal, at the same time a very high and close proportion of hydrophobic binder agent, they are simultaneously informed, fully hydrophobic, with high structural cohesion, close mechanical and thermal properties, and also provide the possibility of improved bonding of both layers, which can be so adezhnym that formed neprergena network binder. The proposed electrode is capable of thermal expansion and contraction without sticking and without damage, such as cracks. Despite the relatively low conductivity of the carrier layer, caused by a large amount of binding agent as compared to conductive crushed coal, the electrode associated with current extraction on the surface of this layer through points or lines spaced apart by about a millimeter. current density up to several hundred milliamps per square centimeter with an acceptable ohmic voltage drop. The durability is significantly increased compared to an electrode in which the active or metal layer is fully wettable, which is probably due to the fact that the liquid-gas front, instead of localizing at the beginning of the electrode’s period of action, on the interface of the catalytic layer and the carrier layer the role of the barrier layer is localized in the catalytic layer adjacent to its side, which is in contact with the electrolyte. In this case, the inevitable movement with time of this front to the side of the electrode open to the gas can be carried out for a very long time without reducing the reaction zone. The carrier layer is highly resistant to the passage of electrolyte in the form of leakage into the gas compartment, even in the presence of a high excess pressure of electrolyte compared to gas. Diffuse introduction of gaseous reactant into the reaction zone is sufficient to provide a current density of about several hundred milliamps per square centimeter without the need for a pore-forming agent to communicate to one or another layer of a given porosity. The porosity, even moderately created naturally by mixing the components of the layers, is sufficient. Thus, the presence of a large amount of binding agent in both LAYERS of the electrode contributes to obtaining a coherent electrode that thermally expands and shrinks cyclically without damage, which can cause multiple manipulations: bending, folding, friction, abrasive abrasion, etc. which facilitates its installation in electrochemical generators. in the region of small thicknesses and porosities of the electrodes, it has surprisingly turned out that it is possible to ensure sufficient supply of gaseous reactants to obtain a current flow rate of 300 mA / cm for hydrogen and mA / cmt for air.
    Table continuation
    80 99
    Nesuttsy100
    Active5
    40
    7
    权利要求:
    Claims (1)
    [1]
    ELECTROCHEMICAL ELECTRODE ELECTRODE, containing one carrier layer and one active catalytic layer having hydrophobic properties, characterized in that, in order to increase service life by increasing elasticity, the electrode thickness is 105-300 microns with the thickness of the active and carrier layers, respectively, 5- 100 and 100-200 microns, and the porosity of the electrode is 10-80%, each layer contains 60-99 wt.% A binder selected from the group consisting of polytetrafluoroethylene and polyvinyl chloride, and 1-40 wt.% Of an electrically conductive substance selected from the group containing rusting powdered carbon, fibrous carbon and graphite, and the current collector is made in the form of dots or lines with an interval of 1 mm on the carrier layer and the collector in contact with them.
    BU_ < I1 1083928
    1083928 2
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1083928A3|1984-03-30|Electrode for fuel cell
    US4524114A|1985-06-18|Bifunctional air electrode
    EP0026995B1|1986-08-27|Thin carbon-cloth-based electrocatalytic gas diffusion electrodes, processes, and electrochemical cells comprising the same
    US5242765A|1993-09-07|Gas diffusion electrodes
    US3268365A|1966-08-23|Alkalic carbonate fuel cell
    Srinivasan et al.1987|Advances in solid polymer electrolyte fuel cell technology with low-platinum-loading electrodes
    CA1306284C|1992-08-11|Metal and metal oxide catalyzed electrodes for electrochemical cells, and methods of making same
    US4826554A|1989-05-02|Method for making an improved solid polymer electrolyte electrode using a binder
    EP0026994B1|1986-12-03|Carbon-cloth-based electrocatalytic gas diffusion electrodes, assembly and electrochemical cells comprising the same
    KR860003681A|1986-05-28|Fuel Cell Using Flexible Electrode
    US4654104A|1987-03-31|Method for making an improved solid polymer electrolyte electrode using a fluorocarbon membrane in a thermoplastic state
    US5441823A|1995-08-15|Process for the preparation of gas diffusion electrodes
    KR20160140731A|2016-12-07|Collector for fuel cells, and fuel cell
    US3600230A|1971-08-17|Gas-depolarized cell with hydrophobic-resin-containing cathode
    US3553029A|1971-01-05|Electrode with carbon layer and fuel cell therewith
    CA1309969C|1992-11-10|Electrolyzing potassium hydroxide solutions using anodes containing nico o _catalyst
    US3704171A|1972-11-28|Catalytic membrane air electrodes for fuel cells and fuel cells containing same
    US3660165A|1972-05-02|Electrodes comprising fluorinated phosphonitrile polymer and fuel cell in combination therewith
    US4457987A|1984-07-03|Liquid fuel cell
    US3573988A|1971-04-06|Electrode comprising non-noble metal disulfides or phosphides and electrochemical cell utilizing same
    US3513028A|1970-05-19|Fuel cell comprising an electrode containing a transition metal boride and a method of making a fuel cell electrode containing a coating of transition metal black
    US4824508A|1989-04-25|Method for making an improved solid polymer electrolyte electrode using a liquid or solvent
    Dyer1985|Improved nickel anodes for industrial water electrolyzers
    US3589944A|1971-06-29|Fuel cells and their method of operation
    Shteinberg et al.1982|Influence of structure and hydrophobic properties on the characteristics of carbon—air electrodes
    同族专利:
    公开号 | 公开日
    JPS648431B2|1989-02-14|
    DE3069070D1|1984-10-04|
    FR2468220A1|1981-04-30|
    CA1137160A|1982-12-07|
    BR8006706A|1981-04-22|
    EP0029124B1|1984-08-29|
    EP0029124A1|1981-05-27|
    ZA806343B|1981-10-28|
    FR2468220B1|1982-02-12|
    JPS5665467A|1981-06-03|
    US4317867A|1982-03-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3553022A|1965-09-30|1971-01-05|Leesona Corp|Electrochemical cell|
    GB1285199A|1968-11-18|1972-08-09|Westinghouse Electric Corp|Gas diffusion electrode|
    FR2215710B1|1973-01-25|1978-04-21|Alsthom|
    US3867206A|1973-12-21|1975-02-18|United Aircraft Corp|Wet seal for liquid electrolyte fuel cells|
    US3912538A|1974-01-15|1975-10-14|United Technologies Corp|Novel composite fuel cell electrode|
    FR2259447B1|1974-01-25|1976-11-26|Alsthom Cgee|
    NL7502842A|1975-03-11|1976-09-14|Stamicarbon|POROUS ELECTRODE.|
    US4104197A|1975-12-17|1978-08-01|Licentia Patent-Verwaltungs-G.M.B.H.|Method of making gas diffusion electrodes for electrochemical cells with acid electrolytes|
    JPS5944749B2|1976-02-12|1984-10-31|Toray Industries|
    FR2344969B1|1976-03-16|1978-08-25|Alsthom Atlantique|US4476197A|1983-10-12|1984-10-09|The United States Of America As Represented By The United States Department Of Energy|Integral manifolding structure for fuel cell core having parallel gas flow|
    US4499663A|1983-10-12|1985-02-19|The United States Of America As Represented By The United States Department Of Energy|Method of fabricating a monolithic core for a solid oxide fuel cell|
    US4476196A|1983-10-12|1984-10-09|The United States Of America As Represented By The United States Department Of Energy|Solid oxide fuel cell having monolithic cross flow core and manifolding|
    US4476198A|1983-10-12|1984-10-09|The United States Of America As Represented By The United States Department Of Energy|Solid oxide fuel cell having monolithic core|
    FR2564249B1|1984-05-11|1986-09-12|Alsthom Atlantique|FITTINGS FOR FUEL CELL STRUCTURES|
    FR2564251B1|1984-05-11|1986-09-12|Alsthom Atlantique|IMPROVEMENTS TO FUEL CELL STRUCTURES|
    FR2564250B1|1984-05-11|1986-09-12|Alsthom Atlantique|IMPROVEMENTS TO FUEL CELL STRUCTURES|
    FR2568412B1|1984-07-27|1986-10-17|Occidental Chem Co|IMPROVEMENTS ON THE STRUCTURES OF FUEL CELLS.|
    US4647359A|1985-10-16|1987-03-03|Prototech Company|Electrocatalytic gas diffusion electrode employing thin carbon cloth layer|
    US4877694A|1987-05-18|1989-10-31|Eltech Systems Corporation|Gas diffusion electrode|
    US6096450A|1998-02-11|2000-08-01|Plug Power Inc.|Fuel cell assembly fluid flow plate having conductive fibers and rigidizing material therein|
    TWI251954B|2003-07-29|2006-03-21|Ind Tech Res Inst|Flat fuel cell assembly and fabrication thereof|
    US20100279177A1|2008-01-03|2010-11-04|Hsiharng Yang|Carbon fiber conductive sheet and manufacturing method thereof|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7925879A|FR2468220B1|1979-10-18|1979-10-18|
    [返回顶部]