• 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:
    1. METHOD OF MAKING BELT ELECTRODES from an at least one layer, including adding carbonaceous or graphite fibers of an aqueous binder emulsion to the aqueous dispersion, distributing the resulting mixture in the form of a layer, drying and calendering, and so that, in order to control electrical conductivity, the dispersion is taken with a carbon fiber or graphite content of 0.1% by weight, and emulsion 4 with a content of 0.5% by weight polytetrafluoroethylene or polyvinylchloxide as a binder, after changing the dispersion and uh pulses are deposited on the fibers, and the layer contains 2099 wt.% of the binder. 2. The method according to claim 1, wherein and binder is deposited so that the binder is deposited on the fibers by means of a mechanical rewinding. 3. Method by Item 1, about tl and h a yu--, shchi-so that the binder is deposited on the fibers with CO with the addition of cataloids, for example. A1 + 3 cations. 4. The method according to Claim 1, which is carried out with the fact that the binding fiber is carried out by heating at 25-30 C. 5. The method according to nn.l -4, OT and I. The fact that a multilayer tape is made by successively applying two or three ctasceu to each other before removing water. : o th 00
    公开号:SU1056928A3
    申请号:SU802994911
    申请日:1980-10-17
    公开日:1983-11-23
    发明作者:Ламбер Клод；Тиссье Алексис
    申请人:Сосьете Женераль Де Констрюксьон Электрик Э Механик "Альстом Э Ко" (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to chemical current sources and relates to a method of manufacturing ribbon electrodes which can, for example, be used in fuel cells with gaseous reactants. . ,
    A known method of manufacturing ribbon electrodes, according to which a homogeneous mixture containing O1 powder of a binder and carbon material, is rolled out wet in the form of a thin layer ij.
    Closest to the proposed technical essence and the achieved result is a method of making ribbon electrodes by adding to the aqueous dispersion of carbon or graphite fibers of an aqueous binder emulsion, distributing the resulting mixture in the form of a layer, drying and calendering}.
    However, this method does not allow to obtain electrodes with good conductivity. I.
    The purpose of the invention is to increase the electrical conductivity of the electrode.
    The goal is achieved by taking a dispersion with a carbon fiber or graphite content of 0.1 wt.%, And an erracy containing 0.5 wt.% Polytetrafluoroethylene or polyvinyl chloride as a binder. After mixing the dispersion and emulsion, the bonding agent is precipitated. fiber, with a layer containing 20-99 wt.% binder.
    The precipitation of the bond is carried out by mechanical agitation, either by adding cations, such as cations A, or by heating at 25-30 ° C.
    A multi-layer tape can be obtained by successively applying two or three mixtures to each other before removing the water.
    The method allows to obtain xopoijy electrical conductivity of the tape, as it provides a good connection between the fibers inside the tape.
    If the concentration of fibers in the dispersion is higher than 0.1% by weight, fiber aggregations or bundles may form, which leads to anisotropy of the material.
    If the concentration of the binder in the emulsion is higher than 0.5 wt.%, It is not possible to control the deposition of the binder on the fibers well (thus, on some fibers large accumulations of the binder, similar to clots, are formed), if the concentration is lower, water cannot be properly removed. in a paper machine.
    Polytetrafluoroethylene and polyvinyl chloride allow all
    operations at room temperature without disrupting carbon fibers.
    Deposition of the binder is a prerequisite, since otherwise it is removed along with the wastewater, and the fiber layer has no mechanical strength. The binder must be deposited on the fiber, otherwise it accumulates with the formation of clots, which leads to the fact that the tape is non-uniform and does not have sufficient mechanical strength necessary to separate without support from the filtration layer. In addition, if the binder does not deposit on the fibers, its aggregates penetrate between the fibers, isolating them from each other, which leads to very weak electrical conductivity. The electrode may contain catalytic, blocking, and also hydrophilic layers. The wet layer has good adhesion, which makes it possible to use it as a lining for other layers of different Composition.
    Example 1. Carbon fibers with a diameter of 5-7 µm and another 4 gm are placed in a cylindrical tank A containing water, then the fibers are separated by intensive mechanical stirring for a few minutes and water is added until the fiber content is O, 1 weight .%.
    Water is added to the vessel B containing polytetrafluoroethylene (PTFE) in a suspension with 40% by weight of water, and the mixture is homogenized by means of the duration of mechanical stirring. The content of PTFE with 0.5 wt.%.
    In the tank A, where moderate mixing is maintained, the contents of the container B are sequentially placed. Then the binder is precipitated with the addition of aluminum sulfate.
    In the paper machine, the sheet is filtered, the flow from the filtration table in the wet state to a thickness of 500 µm, the weight coefficient is 415 g / m, the water content is 76%, the distance between the filtration table and the pressing section is 60 cm. it is calculated that the voltage applied by the sheet is about 50 g / cm, i.e. about 49030 dyn / cm. This layer contains 20 wt.% binder and 80 wt.% fibers.
    According to. :: le drying sheet has the following characteristics:
    Weight coefficient, g / m2
    Thickness, µm Porosity,% 90 Longitudinal Specific Resistance,, 005 With moderate calendering, radiate: Weight coefficient, g / cm Thickness, µm Porosity,% Longitudinal Specific Resistance, Ohm cm Example 2. In tank A disperse 1 g of glass with a length of 6 mm in water with rapid stirring, i.e. at a fiber content of 0.1% by weight, then with moderate mixing, emulsion is slowly added with a content of 20% PTFE. Saving with stirring, mixing with the addition of water. At this concentration, PTFE is 0.5% by weight. Aluminum sulphate solution is slowly added to the homogeneous mixture to start the binder precipitation. Stirring is maintained until precipitation is complete, i.e. until the surface layer of the liquid leaks out. After the filtration table, the sheet in the wet state has a thickness of about 50 mcm, the water content is 72%, the total weight is 633 g / cm, the voltage maintained by the sheet is about 60 g / cm. The binder content in the sheet is 99 wt.%, Fibers 1 wt.%. After drying, the sheet has a thickness of GOO μm, a weighting factor of 198 g / m, a porosity of 85%. By adjusting the BecoBofJ calanpriation mode, the coefficient remains the same (1198 g / m). With a porosity of 50%, the thickness is 180 µm, the longitudinal specific resistance is 10–20 Ohms, with a porosity of 29%, the thickness is 127 µm, and the longitudinal specific resistance is 2–8 Ohms. Adjustment of the desired porosity is carried out by adjusting the distance between the va: faces of the cranes, it is achieved without changing the weighting factor, i.e. a decrease in porosity is achieved by compression or compaction, without drawing, as a result of which there is no surface or preferential effect; it comes and increased open porosity.
    权利要求:
    Claims (5)
    [1]
    . 1. METHOD FOR PRODUCING TAPE ELECTRODES from PO of at least one layer, including adding a binder emulsion to the aqueous dispersion of carbon or graphite fibers, distributing the resulting mixture in the form of a layer, drying and calendering, which requires a higher level. conductivity, the dispersion is taken with a content of carbon fibers or graphite of 0.1 wt.%, and the emulsion with the content as a binder of polytetrafluoroethylene or polyvinyl chloride with a concentration of 0.5 wt.%, after mixing the dispersion and emulsion precipitation it binds to the fibers, the layer containing 2099% by weight of the binder.
    [2]
    2. The method according to claim 1, with the fact that the deposition of the binder on the fibers is carried out by means of mechanical mixing.
    [3]
    3. The method according to claim 1, about t l and h a u -. and the fact that the binder is deposited onto the fibers with the addition of cations, e.g., A1 + 3 cations.
    [4]
    4. The method according to p.
    [5]
    5. The method according to nnil-4, characterized in that the multilayer tape is made by successively applying two or three mixtures to each other before removing the water.
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    同族专利:
    公开号 | 公开日
    FR2468219A1|1981-04-30|
    ZA806341B|1981-10-28|
    US4726882A|1988-02-23|
    EP0028729B1|1984-09-12|
    BR8006705A|1981-05-12|
    EP0028729A1|1981-05-20|
    CA1139833A|1983-01-18|
    JPS5668199A|1981-06-08|
    DE3069169D1|1984-10-18|
    FR2468219B1|1982-10-15|
    JPH0350039B2|1991-07-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB836457A|1956-06-28|1960-06-01|Union Carbide Corp|Improvements in and relating to gas diffusers for electric batteries|
    NL302414A|1962-12-26|
    US3269889A|1963-01-02|1966-08-30|Johns Manville|Asbestos paper containing carbon and method of making it|
    US3265557A|1964-01-09|1966-08-09|Atlantic Res Corp|Fibrous compositions|
    US3367851A|1964-04-09|1968-02-06|Minnesota Mining & Mfg|Non-woven conductive paper mat|
    FR87730E|1965-04-13|1966-07-22|Wonder Piles|Improvements in electrode manufacturing processes, and new electrodes thus obtained|
    US3551205A|1968-12-05|1970-12-29|American Cyanamid Co|Composite paper electrode for a voltaic cell|
    US3690975A|1969-11-18|1972-09-12|Courtaulds Ltd|Manipulation of filaments|
    FR2143593A1|1971-06-30|1973-02-09|Automatisme Cie Gle|Laminated electrochemical electrode - in sheet form contg a conductive powder in a ptfe matrix|
    DE2208632C3|1972-02-24|1981-07-30|Battelle-Institut E.V., 6000 Frankfurt|Process for the production of carbon-containing gas electrodes with a hydrophobic backing layer|
    JPS5610774B2|1972-07-20|1981-03-10|
    JPS5018702A|1973-06-22|1975-02-27|
    US3960601A|1974-09-27|1976-06-01|Union Carbide Corporation|Fuel cell electrode|
    US4166143A|1977-01-24|1979-08-28|Prototech Company|Control of the interaction of novel platinum-on-carbon electrocatalysts with fluorinated hydrocarbon resins in the preparation of fuel cell electrodes|
    US4111155A|1977-09-12|1978-09-05|P. R. Mallory & Co., Inc.|Cathode coating apparatus|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.|
    JPS63187574A|1987-01-29|1988-08-03|Japan Gore Tex Inc|Fuel cell electrode-matrix monobloc forming and its manufacture|
    US5053375A|1990-01-08|1991-10-01|Alupower, Inc.|Electrochemical cathode and materials therefor|
    EP0621882B1|1992-01-16|1999-07-07|E.I. Du Pont De Nemours And Company|Process for making fluoropolymer composites|
    US6205016B1|1997-06-04|2001-03-20|Hyperion Catalysis International, Inc.|Fibril composite electrode for electrochemical capacitors|
    JP4482228B2|1998-04-09|2010-06-16|カリフォルニア・インスティテュート・オブ・テクノロジー|Electronic technology for analyte detection|
    GB9903320D0|1999-02-15|1999-04-07|Johnson Matthey Plc|Substrates|
    DE102007038838A1|2007-08-16|2009-02-19|Forschungszentrum Jülich GmbH|Method for producing a high-temperature fuel cell|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7925878A|FR2468219B1|1979-10-18|1979-10-18|
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