JPH043067B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for manufacturing a thin film electrode for electrochemical devices or batteries such as batteries and storage batteries, that is, primary batteries and secondary batteries, and a current collector for the electrode. Relating to a method of manufacturing. More specifically, the invention relates to a method of manufacturing thin film gas electrodes.

An object of the present invention is to provide an electrode manufacturing method for obtaining a thin film electrode of a desired shape.

BACKGROUND OF THE INVENTION Today, it is known to produce flat-shaped thin film electrodes for electrochemical devices from pastes containing tetrafluoroethylene resins (PTFE; polytetrafluoroethylene).

For example, Elmore and Tanner U.S. Pat. No. 3,419,900
preparing a paste-like mixture comprising a metal electrocatalyst powder and a waterproofing substance formed by a colloidal dispersion of preferably a tetrafluoroethylene resin, and depositing this paste-like mixture on a grid made of, for example, silver or platinum; discloses flat thin film gas electrodes for fuel cells obtained by drying and then heating a grid coated with this pasty mixture to remove the soap-like dispersant. .

In addition, American Cyanamid's French patent No.
No. 1,522,224 is known, which comprises a metal catalyst in the form of an aqueous solution, a waterproof material formed by a latex of, for example, a tetrafluoroethylene resin, and if necessary a lubricating oil such as mineral oil and a dispersion medium such as silica or The formation of gas electrodes for fuel cells from pasty mixtures containing granular or colloidal alumina is disclosed. According to this French patent No. 1522224, the mixture is applied to a metal grid, and this grid, coated and covered on each side with a foil of plastic material, is then calendered between rotating rollers. Alternatively, cut into thin sections, repeat this calendering and thinning operation several times, then wash the thin film flat electrode thus obtained with a solvent and remove the dispersion medium from it if the lubricating oil and mixture contain it. Remove.

Finally, Compagnie Generale d'Electricite's French Patent No. 2143593 discloses a method for manufacturing flat multilayer electrodes, in which conductive materials and tetrafluoroethylene resin preparing a mixture consisting of a gum or latex of a waterproofing substance such as, more particularly, a mixture which is applied to a medium such as a grid or expanded metal, or to a porous sheet made, for example, from a tetrafluoroethylene resin; is dried and thinned, thus obtaining a layer, several layers are stacked together and the stack thus formed is compressed to obtain a flat multilayer electrode.

These known techniques result in flat thin film electrodes containing an electrocatalytic reagent and a waterproofing agent (such as a tetrafluoroethylene resin in particular).

The invention provides electrodes that can be shaped into desired shapes.

The method of the invention is obtained, on the one hand, by coagulation of a tetrafluoroethylene resin in the form of an emulsion;
and has a morphology formed from small fibers into particles, which particles have an average size of 0.5 mm to form a dry mixture in which the lubricant is added to form a pasty mixture. However, the first aspect of this invention is achieved by using such PTFE.
on the other hand, this paste-like mixture is not thinned or calendered, but this According to a second feature of the invention, compression;
It is given the desired shape by known molding methods such as injection or transfer molding.

According to the invention, active products,
A pasty mixture comprising a lubricating oil and a specific PTFE is shaped into the desired shape, more particularly by compression, injection or transfer molding.

In this way, the electrode can be made to have a desired shape, such as a hollow cylinder shape, a hollow truncated cone, a glove finger, a hollow prism, etc.
These listed shapes are not limiting. Applicant may wish to use other forms of PTFE, especially colloidal dispersion PTFE as advocated by the above-mentioned US Pat. No. 3,419,900, or the above-mentioned French Patent No.
If a PTFE latex or gum as described in US Pat. It is impossible to obtain an electrode, compression,
It has been discovered that it cannot be used industrially in injection or transfer molding.

Therefore, complex geometries, in particular the desired shape of the electrically active gaseous compound specimen, can be used to accommodate the electrodes in specially shaped cases in order to adapt the electrodes and batteries containing the electrodes to specific applications. For electrochemical cells with complex geometries, in order to achieve concentration gradients or to simplify the structure of the cell in a case where it is desired that the electrodes constitute an essential part of the cell's container. It is of great interest to construct non-flat thin film electrodes, especially thin film gas electrodes.

Applicants then discovered that, as mentioned above, pasty mixtures are commercially available, and in addition to the active materials, a wetting agent is added to dry 60%.
It has been discovered that it is not possible to usably form thin uneven electrodes in electrochemical cells if constructed to include PTFE in the form of an aqueous suspension containing PTFE. After drying and distillation of the mixture of active materials and their suspensions,
Even with the addition of lubricating oil, a paste is obtained that cannot be shaped into uneven shapes. This is because, as stated in the above-mentioned prior patents relating to the manufacture of flat electrodes, electrodes obtained by other than calendering or thinning are brittle and lack the mechanical strength necessary for industrial applications. It is from.

The first object of the present invention is to provide a method for manufacturing an electrode, in particular a thin film gas electrode of any shape that is not flat, which method comprises the steps of: preparing a homogeneous mixture of at least one compound having electrocatalytic activity; and possibly from at least one compound having electrical conductivity and dry fibers of a tetrafluoroethylene resin, adding a lubricating oil and coating the particles in a mixture with the lubricating oil. The mixture is characterized in that a surfactant is added thereto to form circulated mixture particles.

Catalytically active compounds are formed by carbon catalyzed by silver, manganese dioxide, and phthalocyanine.

Generally, the electrically conductive compounds that already exist are
Made of carbon black or graphite.

The tetrafluoroethylene resin to be used is formed from dry fibers and has an average size of 0.5 mm and is obtained by coagulation of a PTFE emulsion.
For example, it is commercially available as one of the following:

Dupont, Series 6 Imperial Chemical Industries, Inc. (ICI), Series CD Hoechst, Series 2000 Producer DuPont, Series 6 Mont d'Aison, Series DPTA tenventyl substitute, kerosene, naphtha) or at least one oil (recera oil).

If the surface tension of lubricating oil is too large to give good lubricity to the active compound and PTFE mixture particles, adding surfactants like alcohol or ketones to it to lower its surface tension. is recommended.

The dry mixture may more advantageously be formed in a stirrer that is rotated at high speed.

As far as the shaping operation is concerned, it should first be noted that this shaping operation is carried out by compaction of a homogeneous mixture, before and after the addition of lubricants and possibly surfactants.

Additionally, the forming operation and the transport of the lubricated mixture to the forming operation should preferably be carried out without changing the direction of flow of the lubricated mixture so as to maintain the orientation of the PTFE fibers, and These fibers are therefore kept parallel to each other,
It has therefore been found that the strength of the resulting electrode is increased.

Finally, molding operations are accomplished by compression, injection, and transfer molding.

The invention is particularly, but not exclusively, utilized for producing positive electrodes for electrochemical cells (primary or secondary cells).

The invention also relates to the manufacture of current collectors for electrochemical devices or batteries (batteries and accumulators, i.e. primary or secondary batteries), more precisely single electrode-current collector assemblies. It also relates to

A method of manufacturing a current collector for an electrochemical device includes:
It involves placing the collector on the electrode in the form of a thin conductive film that cannot be separated from the electrode (which has the disadvantage of damaging the electrode). This film is more particularly a porous metal film that adheres to the surface of the electrode. This film conforms to the exact shape of the electrode, whatever its shape.

The present invention also provides a method for manufacturing a current collector for an electrode of an electrochemical device, characterized in that a thin porous metal film is attached to at least a portion of the surface of the electrode. The purpose is also to provide.

This attachment is more advantageously carried out by electroplating. This deposit is preferably nickel;
It may also be copper, silver, gold, platinum, Monel alloy, titanium, or iron.

This thickness is generally between 0.01 mm and 5 mm, preferably 0.05 mm.

The pore diameter of the deposit is 0.5 mm or less, and its permeability is 100 cm/h or more.

Furthermore, the present invention aims to provide a single electrode-current collector assembly obtainable by the method described above, the current collector comprising a thin adhesive porous metal deposited on the electrode. Formed by film.

In this invention, the current collector is attached on the electrode having an arbitrary shape, and even if the shape of the electrode is very complicated, the current collector can be attached to the electrode. conforms precisely and extremely faithfully to the shape of the surface. Although strongly bonded to the electrode, a very thin film can be formed. In this way, an extremely lightweight current collector is formed, which reduces the weight of the electrode-current collector assembly and the weight of the electrochemical cell (such as a battery or accumulator) containing the current collector. It is possible.

Second, the present invention allows for the formation of porous, lightweight electrode-current collector assemblies so that the current collector can be firmly attached to the electrode.

The method of manufacturing uneven thin film electrodes according to the invention will be clarified by the following several examples, which serve as non-limiting examples of the method of the invention. In these examples, parts are expressed in parts by weight.

Example 1 30 parts of silver catalyzed carbon (electrocatalytic compound), 60 parts of graphite (electroconductive compound), 4 parts of carbon black (electroconductive material), and 60 parts of carbon black (electroconductive material). PTFE consisting of "Soreflon (trade name) 6-20 type" is thoroughly stirred with 50 parts of Rissela oil (lubricant). This mixture is obtained by operating for 30 minutes in a rotary stirrer, ie a pot rotating around a horizontal axis at a peripheral speed of 20 m/min.

In this way, the paste obtained in an amorphous form by homogeneous scattering or as a preform after precompressing the paste into a cake,
It is fed into a mold having a shape corresponding to the shape desired to be imparted to the electrode and which has been previously heated to 50°C.

The molding provides relative motion between the mold and the piston (such as a fixed mold and a moving piston, a moving mold and a moving piston, or finally a fixed piston and a moving mold) by means of a piston cooperating with the mold. This is achieved by compressing the paste in the mold, and this compression pressure is e.g.
per ton, but of course depends on the plasticity of the mixture undergoing compression. This compaction is carried out in a fixed amount, with nozzle holes or leaks allowing removal of excess paste from the mold.

The formed electrode is removed from the mold and the lubricant is removed, for example by washing with a solvent.

This electrode may be provided with a current collector in a conventional manner or preferably as described hereinafter.

Example 2 55 parts of manganese dioxide catalyzed carbon and 45 parts of ICI series CD type PTFE are thoroughly mixed with 50 parts of kerosene (lubricant).

This mixing is carried out in an agitator of the type of a concrete mixer. The paste mixture thus obtained is fed into an injection mold via a raw material feed hopper. Hydraulic piston creates a uniform paste with smooth movement
Pressed into an injection chamber or pot maintained at 50°C, the paste is then fed through a through nozzle into a mold heated to 50°C. This mold has a shape corresponding to the shape desired to be imparted to the electrode. The paste assumes the desired shape for the electrode. The mold is then opened and the electrodes removed.

The electrode thus obtained is provided with a current collector as shown in Example 1, and the lubricant is removed, for example, by evaporation.

Example 3 The method is similar to Example 2 as far as the stirred product and stirring operation are concerned.

The paste mixture thus obtained is
It is injected in a continuous stream through a suitable nozzle which provides a hollow tube for the paste. By passing the solvent through this tube, it is removed in concert with either compression or suction.

The tube is cut to the length necessary to form the electrode, which is provided with a current collector as previously shown.

Examples 4 and 5 First, the pasty mixture (in Example 4)
prepared to have the same composition as in Example 1 and obtained in the same manner as in Example 1;
(In Example 5) It is prepared with the same composition and obtained in the same way as in Example 2.

The paste thus obtained is 20 or
It is preformed by precompression, at a pressure of 80 kg/cm ² and at a speed of 5 to 10 cm/min, preferably under vacuum, into a cake or preform that is fed into the pot of a transfer molding machine. By applying pressure to the cake, this paste is passed from the transfer pot to the precompression chamber of the transfer molding machine, and a hydraulic piston can apply any amount of paste from the precompression chamber to the electrodes. Move to a mold with a shape corresponding to the desired shape. The pressure applied to the cake depends on the desired reduction rate, which for example is 100 to 200 Kg/cm ² for a reduction rate of 20 and 600 to 800 Kg/cm ² for a reduction rate of 180.
The pot, pre-compression chamber and mold are approximately
The temperature is maintained at 50℃.

The various parts described above for the transfer molding machine are configured to provide a path that does not change the direction of the paste, so that the PTFE fibers remain parallel to each other.

As in Examples 1 to 3, a collector is provided and the lubricant is removed from the resulting electrode by pressing it into the mold after removal of the electrode from the mold.

In the accompanying FIGS. 1 to 9, several shapes of electrodes obtainable according to the invention are shown, which are, of course, by way of non-limiting example.

The accompanying figures 1 to 9 show that it is possible to obtain electrodes with any desired shape. In fact, a paste having the composition of this invention,
It is always possible to pass through the nozzle of a die with the desired shape and thus obtain the desired electrode section.

Of course, the thickness and shape of the electrodes are adapted to suit the required properties such as mechanical strength, ease of gas diffusion, electrical activity, and hermeticity.

Generally, the electrode thickness is between about 0.05 mm and about 5 mm, preferably around 0.5 mm.
It will be appreciated that the electrodes may have a non-uniform thickness, as exemplarily shown in FIG.

The average diameter of the remaining pores does not exceed 10 microns and the permeability is approximately 100 cm/h.

In some cases, a nozzle may be used to include a central core and an annular opening, and the paste may be aspirated in the form of a tube.

Thus, the tubular electrode can be open at both ends (FIGS. 1, 5, 6, 8) or open at one end and closed at the other end. ie in the shape of a glove finger (FIG. 2) or closed at both ends.
These thicknesses may vary (see Figure 8). The frustoconical shape (see Figures 3 and 4) may be compressed, for example.
It can be obtained by several methods such as injection or extrusion in a mold with a conical shape.
The frustoconically shaped surface may be open at both ends (see Figure 3) or open at one end and closed at the other end (see Figure 4). , or otherwise closed at both ends. These surfaces may or may not be surfaces of revolution, and may have uniform or non-uniform thickness.

When conical or cylindrical electrodes are closed at one end (see the glove finger-shaped ones in Figures 2 and 5), these electrodes are continuous with the cylindrical or conical surface. It may be closed by a spherical surface having a shape of .

As far as the current collector is concerned, the current collector is shown in Examples 6 to 14 and Figures 10 to 1 of the attached drawings.
5, or otherwise by conventional methods such as an insert core. In conventional methods, the current collector may consist of a metal grid, an expanded metal sheet, a tape or filament, a capsule.
an insert core is preferably positioned in the mold opposite the wall, the insert is preferably secured to the mold, e.g. by inset, before the paste is fed under pressure in the mold;
The paste surrounds the current collector while integrating it into the mass.

In some of the accompanying Figures 1-9, the current collector is shown positioned within the electrode.

Example 6 45 parts by weight of a tetrafluoroethylene resin, more particularly a tetrafluoroethylene resin obtained from dry fibers and having an average size of 0.5 mm, and obtained by coagulation of a tetrafluoroethylene resin emulsion. The ethylene resin and 55 parts by weight of silver catalyzed carbon are thoroughly mixed with 50 parts by weight of a lubricant such as kerosene to obtain a paste.

This paste is rolled out between rollers heated to 50°C to obtain a 0.5 mm thick strip.

As can be seen from FIG. 10, the roll A of this strip is mounted on a shaft 31. The unwound strip B is attached to the direction changing roller 3.
3 and then a conductive roller 34 located in an electrodeposition tank 35 and immersed in an electrolyte bath containing a solution of soluble nickel salts. A soluble nickel anode, for example formed by a nickel ball 37, is placed in the electrolyte bath 36. The compression roller 38 presses the strip B against the transmission roller 34 and the voltage for electrolysis is applied to the conductor 4.
a terminal a connected to the shaft 39 of the transmission roller 34 by 0 and connected to the soluble anode formed by the ball 37 via a conductive plate 42 and a conductive wire 41 in contact with the ball 37;
and terminal b.

By way of example, this electrolyte tank contains 80 g of nickel in the form of nickel sulfate and 30 g of boric acid per liter of solution. The density of the electrodeposition current is 100 amperes per cm ² of the immersed electrode, and the running density of strip B is such that each electrode section
It remains in the electrolyte bath for a time between 30 seconds and several minutes, depending on the desired nickel deposit thickness. This deposit exists to form a current collector. There is a face 43 of the strip B opposite the face contacting the transfer roller 34 which receives the nickel deposit forming the current collector.

After passing the deflection roller 44, the strip, which contains on its surface 43 a nickel deposit which will form a current collector, passes through a wash liquid reservoir 45 which is placed in a tank 46 while passing around a pulley 47. do. After passing through the cleaning liquid tank, the cleaned strip D passes through a direction change roller 48 and then reaches a drying oven 49 where it is dried, and finally the dried electrode E is passed through a direction change roller 51. After passing through, it is wound around the drum 50.

In this way, a strip formed of electrode material coated on one side with a nickel current collector is obtained on the drum 50.

This strip is then cut into pieces of the desired shape and size. This small piece can be processed into a desired shape, for example, by compression molding, injection molding or transfer molding.

Example 7 60 parts by weight of a tetrafluorinated ethylene resin of the same quality as in Example 6, 30 parts by weight of carbon catalyzed by manganese dioxide, 6 parts by weight of fluffite and 4
Parts by weight of conductive carbon black are thoroughly stirred with 45 parts by weight of kerosene to obtain a paste.

This paste is poured into a mold heated to about 50° C. and then removed from it in the desired shape. For example, a truncated cone-shaped glove finger-shaped electrode (the lower part of the truncated cone is closed by a spherical cap) is removed from the mold. Such an electrode is designated F in FIG.

As shown in FIG. 11, this electrode F has an axis protruding within an electrolyte bath 53 having the same composition as the electrolyte bath shown in Example 6 and disposed within a bath 54. It is placed on 52.

The assembly consisting of the shaft 52 and the electrode F rests on a rib 55 of an electrode carrier 56, the periphery 57 of which is provided with a hole 57a through which the electrolyte can pass. It is formed. The purpose of the ribs 55 is to attach the electrode F to the shaft 52, thus improving the electrical contact between this shaft and the electrode to which it is electrically connected. This is shown even more clearly in FIG. 12, which is a cross-sectional view along line XX in FIG. 11.

Nickel balls 58 are arranged in the space between the bath 54 and the electrode carrier 56, these balls being arranged in the electrolyte bath 53 and electrically connected to an electrical connection 59 made of titanium, for example. It is connected to one of the current supply terminals a through a conductive part 60, and the other terminal b is connected to the shaft 52 through a conductive part 61.

The applied current density is 1dm ² of the attached electrode
100 amps per. Powered on,
The deposit is applied for a period of time between 30 seconds and 2 minutes. The electrode coated with the electrodeposited nickel layer is then dried and the lubricating oil is removed, for example by evaporation.

An electrode prepared in this way can be used very conveniently only to form the cathode of an electrochemical cell (such as a battery) by combining an anode mass and a separator. For example, it may be used to construct cells of the type disclosed in another patent application entitled "Electrochemical Cells Including Thin Film Gas Electrodes," filed on the same date by the same applicant.

Examples 8, 9 and 10 According to the invention, the metal deposit may be formed to have a non-uniform thickness over the electrode surface to be coated. In this way, the current collector may be formed to have a non-uniform thickness.

Therefore, the metal deposits and the current collector (partially shown in FIG. ), ribbed structures (as shown in FIG. 14 representing a portion of a current collector 65 provided with a polar face with protruding ribs 66 ), ribbed structures (resembling a diamond crystal); The electrode 6 is provided with a protrusion 68 having a similar shape.
It may be a frame-like structure (as shown in FIG. 15 representing 7) or a structure formed with a lattice or tongue. These structures enable the resulting electrode-current collector assembly to be better suited to withstand mechanical stress in one or more arbitrary directions or to induce electrical conductivity in one or more directions. , on the other hand does not interfere with the general permeability of the electrode due to the reduced thickness of the deposit in the main part of the deposit, for example between the ribs or between the diamonds.

In a variant, a uniform deposit is first formed and then the deposit has a special structure superimposed on the first uniform deposit.

Non-uniform deposits, particularly those described in Example 8 (FIG. 13), Example 9 (FIG. 14) and Example 10 (FIG. 15), occur on the electrode during electrodeposition. This may be achieved by applied masks, these masks being similar to the ribs 55 shown in FIGS. 11 and 12, for example.

Example 11 and Example 12 In these examples, the electrolyte baths shown for Examples 6 and 7 were replaced by the following cells: 220 g/l copper sulfate and 30 g/l sulfuric acid. The soluble anode is replaced by an electrolyte copper plate instead of a nickel ball. The current density used is several tens of amperes dm ² in this case.

Example 13 and Example 14 The electrolyte baths of Example 6 and Example 7 were
1 of silver cyanide, 70 g/l of sodium cyanide and 40 g/l of sodium carbonate, the soluble anode was formed by silver foil instead of a nickel ball, and the current used was The density is several tens of amperes/dm ² .

Within the scope of this invention, the deposit may also be formed from gold, platinum, monel alloy, titanium or iron (although iron is cheaper).

The method of this invention is extremely simple and therefore very effective; the current collector can be attached to any shape of electrode, and the amount of metal deposited can be adjusted arbitrarily. Can be easily automated.

The current collector is obtained by this method by a metal film deposited on the electrode, which is porous and does not adhere to the electrode, no matter what shape it is. It adheres perfectly and can be completely adjusted to the desired conductivity and the desired mechanical strength.

Also, the method of the invention does not require the prior purchase or storage of grids or foils, which are only necessary in the case of the prior art methods mentioned in the preamble of this application.

As will be clear and better understood from what has been described above, this invention is in no way limited to the specifically contemplated modes of application and embodiments, but rather includes all variations thereof. It is something that

[Brief explanation of drawings]

FIG. 1 shows a perspective view of an electrode in the form of a hollow cylindrical tube open at both ends. Figure 2 shows
1 is a perspective view of a hollow cylindrical electrode that is open at one end and closed by a spherical surface at the other end; FIG. FIG. 3 is a perspective view of an electrode in the form of a hollow truncated cone open at both ends. FIG. 4 shows in a perspective view a truncated cone-shaped glove finger-shaped electrode which is open at one end and spherically closed at the other end. FIG. 5 shows a perspective view of a tubular electrode whose cross section is not circular. FIG. 6 shows in a perspective view an electrode in the form of a hollow prism open at both ends. 7th
The figure is a perspective view of an electrode having a W-shaped cross section. FIG. 8 is a perspective view of an annular electrode having a non-uniform thickness. FIG. 9 represents in a perspective view an electrode with a table top surface and a number of longitudinal ribs. FIG. 10 schematically shows, in cross-section, a first embodiment of a device for carrying out the method of the invention. 11th
The figure is a sectional view of an embodiment of a device for carrying out the method of the invention. FIG. 12 is a sectional view taken along line XX in FIG. 11. FIG. 13, FIG. 14, and FIG. 15 are a plan view and a perspective view showing the structures of three types of current collectors obtained by the method of the present invention. In the figure, 1, 4, 7, 10, 13, 16,
19 and 22 indicate electrodes.

Claims (1)

Claims: 1. A method for manufacturing an electrode, in particular a thin film gas electrode shaped into a non-flat shape, comprising: preparing a homogeneous mixture from dry particles of an active compound and dry fibers of a tetrafluoroethylene resin; The active compound is formed by at least one electrocatalytically active compound and at least one electroconductive compound, with the addition of a lubricating oil and, if necessary, a surfactant, whereby the particles of said mixture are A method of manufacturing an electrode, comprising coating the mixture with the lubricating oil and shaping the lubricated particles of the mixture to form an electrode. 2. The electrode according to claim 1, wherein the tetrafluoroethylene resin is composed of particles formed from dry fibers and has an average size of 0.5 mm obtained by coagulation of a PTFE emulsion. manufacturing method. 3. The molding operation and the transport of the lubricated mixture to the molding operation are carried out without changing the direction of flow of said lubricated mixture so as to maintain the orientation of the PTFE such that the PTFE fibers are parallel to each other. A method for manufacturing an electrode according to claim 1 or 2, which is carried out. 4. A method for producing an electrode according to any one of claims 1 to 3, wherein the electrode obtained has a thickness in the order of 0.05 mm to 5 mm, preferably 0.5 mm. 5. The method for producing an electrode according to any one of claims 1 to 4, wherein the compound having catalytic activity is composed of catalyzed carbon. 6. The method for manufacturing an electrode according to any one of claims 1 to 5, wherein the electrically conductive compound is composed of carbon black or graphite. 7. The method for manufacturing an electrode according to any one of claims 1 to 6, wherein the lubricating oil is composed of at least one type of liquid hydrocarbon. 8. The method for manufacturing an electrode according to any one of claims 1 to 6, wherein the lubricating oil is composed of at least oil. 9. Claims 1 to 8, wherein the mixture is formed in a stirrer that is rotated at high speed.
A method for manufacturing an electrode according to any one of paragraphs. 10. According to any of claims 1 to 9, compression of the homogeneous mixture is carried out prior to the molding operation, before or after the addition of the lubricating oil and optionally a surfactant. Method of manufacturing the described electrode. 11. The method for manufacturing an electrode according to any one of claims 1 to 10, wherein the molding operation is accomplished by compression, injection, or transfer. 12. A method for manufacturing a current collector for an electrode, comprising: preparing a homogeneous mixture of dry particles of an active compound and 4
Prepared from dry fibers of fluorinated ethylene resin, the active compound is formed by at least one compound having electrocatalytic activity and at least one compound exhibiting electrical conductivity, and the active compound is formed by a lubricating oil and, if necessary, an interfacial compound. adding an active material, thereby coating the particles of the mixture with the lubricating oil, shaping the lubricated particles of the mixture to form an electrode, and applying a thin porous metal film to the surface of at least a portion of the electrode. A method for manufacturing a current collector for an electrode, characterized in that the deposition is carried out by electroplating the electrode. 13. A method of manufacturing a current collector for an electrode according to claim 12, wherein the deposit is composed of nickel. 14. The method of manufacturing a current collector for an electrode according to claim 12, wherein the deposit is comprised of copper. 15. The method according to any one of claims 12 to 14, wherein the deposition is stopped when the thickness of the deposit is between 0.01 mm and 5 mm, preferably of a size of 0.05 mm. A method of manufacturing a current collector for an electrode.