JP3495668B2 - Fuel cell manufacturing method - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a fuel cell, and more particularly to a polymer electrolyte fuel cell.

[0002]

2. Description of the Related Art In a fuel cell, normally, an anode gas containing hydrogen is supplied to the anode side and a cathode gas containing oxygen (oxidant gas) is supplied to the cathode side, and hydrogen and oxygen are electrochemically reacted to generate power. To do. Air is generally used as the cathode gas. As the anode gas, in addition to pure hydrogen gas, a fuel gas such as natural gas or light hydrocarbon such as naphtha is reformed into a hydrogen-rich reformed gas.

There are various types of fuel cells, but in recent years, solid polymer fuel cells (PEFCs) using a solid polymer membrane as an electrolyte have been actively researched. A polymer electrolyte fuel cell has a solid polymer membrane (electrolyte) made of a cation-fluorine ion exchange resin and the like having a cathode on one side and an anode on the other side, and this is placed between two gas diffusion layers. It has a basic structure. A practical polymer electrolyte fuel cell has a large output by stacking a large number of such basic structures as unit cells.

FIG. 6A is a sectional view in the thickness direction showing a general cathode partial structure of the unit cell.
Reference numeral 121 is an electrolyte, 122 is a cathode, and 124 is a cathode side gas diffusion layer. Although only the cathode side is shown here, the anode side has almost the same configuration.
As shown in the particle cross-sectional view of FIG. 6B, the cathode 122 is composed of particles obtained by coating conductive particles (for example, carbon particles) carrying catalyst particles such as platinum (Pt) with an ion exchange resin. It is used to form a sheet. The catalyst particles promote the electrochemical reaction at the electrodes, and the ion exchange resin transports the protons generated at the anode while forming an outlet path for the water generated during power generation. The conductive particles have a function of ensuring conductivity for taking out the generated power. To obtain good power generation efficiency,
It is desirable to abundantly secure the interface where the catalyst phase / ion exchange resin phase / gas phase (cathode gas or anode gas) comes into contact, that is, a so-called three-phase interface.

[0005]

However, the following problems are likely to occur in the electrode having the above structure. That is, FIG.
As in (b), the coating film thickness of the ion-exchange resin coated on the conductive particles is not constant, and there are a region A having a small film thickness and a region A ′ having a large film thickness. At this time, the catalyst particles close to the thin film region A are likely to come into contact with the gas phase, but the catalyst particles close to the thick film region A ′ are deeply buried in the ion exchange resin and come into contact with the gas phase. Difficult to be practically inert. When the catalyst particles are thus buried in the ion exchange resin, it becomes difficult for the catalyst particles and the gas phase to come into contact with each other, and it becomes difficult to secure a three-phase interface.

On the other hand, if the amount of catalyst supported is increased, the power generation reaction can be covered for the time being, but generally the cost of the catalyst increases because the catalyst is expensive. As described above, it is considered that there is still room for technological improvement in forming abundant three-phase interfaces in the electrodes of fuel cells. The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a fuel cell capable of obtaining good power generation efficiency by an electrode in which three-phase interfaces are abundantly secured as compared with the related art, and manufacturing thereof. To provide a method.

[0007]

In order to solve the above problems, the present invention has a cell in which an anode and a cathode are arranged on both sides of an electrolyte membrane, and an anode gas is supplied to the anode side and a cathode gas is supplied to the cathode side. As a fuel cell for generating electricity by generating electricity, at least one of an anode and a cathode has a first particle made of a conductive material coated with an ion exchange resin and a conductive material not coated with the ion exchange resin and carrying a catalyst. And a second particle consisting of
It is assumed that one particle is in contact with the second particle .

When the electrode is composed of the mixture of the first particles and the second particles as described above, one particle surrounds the other particle, so that the catalyst supported on the second particle is the first particle. Without being completely covered by the surface (ion exchange resin),
Moreover, it comes into contact with the ion exchange resin. As a result, the three-phase interface including the catalyst phase, the ion exchange resin phase, and the gas phase is secured in abundance as compared with the conventional electrode, and the power generation efficiency of the fuel cell is improved.

The present invention as described above can be specifically applied to a solid polymer fuel cell using a solid polymer membrane as an electrolyte membrane. Further, it is easy to obtain carbon particles as the conductive particles and a fluorine-based cation exchange resin as the ion exchange resin. When these materials are used, it is preferable that the weight ratio of the first particles to the second particles is in the range of 0.1 to 0.6 in the electrode composed of the mixture of the first particles and the second particles. It was clarified from the experimental results of the examples.

Further, in the present invention, when the above-mentioned materials are used for the conductive particles and the ion exchange resin, in the first particles,
The weight ratio of the ion exchange resin to the conductive particles is 0.2 to 1.
It was clarified from the experimental results of the examples that the range of 6 is preferable. The present invention is to produce an anode and cathode <br/> de, a manufacturing method of a fuel cell undergoing these processes for producing a cell disposed on both sides of the electrolyte membrane, an anode and a cathode at least one of During the production of the electrode, the first particles made of a conductive material coated with the ion exchange resin and the ion exchange resin are not coated and the catalyst is used.
And a step of mixing the second particles made of a conductive material carrying the. With such a manufacturing method, the fuel cell of the present invention described above can be manufactured.

Here, as a specific content of the electrode manufacturing step, there is a method of manufacturing the first particles by coating a conductive material with an ion exchange resin and then performing a drying step. After mixing the first particles and the second particles,
It may be subjected to a rolling process of rolling this into a sheet.

Further, the present invention is directed to a first particle made of a conductive material coated with an ion exchange resin , and an ion exchange resin.
The method for producing an electrode for a fuel cell is characterized in that it comprises a step of mixing with a second particle which is not coated and is made of a conductive material on which a catalyst is supported. As a result, the electrode used in the fuel cell can be manufactured.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION 1. Embodiments A cell unit of a polymer electrolyte fuel cell, which is an application example of the present invention, will be described below. Since the main feature of the present invention is the cell configuration, the basic configuration of the polymer electrolyte fuel cell will be described first, and then the cell configuration will be described in detail.

1-1. Structure of Cell Unit FIG. 1 is an assembly view of a cell unit 10 which constitutes the polymer electrolyte fuel cell of the present embodiment. As shown in the figure, the cell unit 10 as a whole includes a cathode side channel plate 60 and an anode side channel plate 50.
And a cell 20 is arranged between the cells.

The cell 20 comprises a solid polymer film 21, an electrode 22,
23 (cathode 22, anode 23), gas diffusion layer 2
It is composed of 4, 25, etc. In FIG. 1, the anode 23 is shown by a broken line because it is on the lower surface side of the solid polymer film 21. The cathode 22 side of the cell 20 is overlaid on the cathode side channel plate 60 via the gasket 40. Further, the anode 23 side is superposed on the anode side channel plate 50 via the gasket 30. The anode 22 and the cathode 23 are sheet-shaped molded bodies carrying respective electrode catalysts, and are also called catalyst layers.

At this time, carbon paper impregnated with, for example, polytetrafluoroethylene (PTFE) as a water repellent is provided between the cathode 22 and the cathode side channel plate 60 and between the anode 23 and the anode side channel plate 50. The gas diffusion layers 24 and 25 are respectively inserted. These gas diffusion layers 24 and 25 are
It secures a current flow between the electrodes 22 and 23 and the channel plates 50 and 60, and is also called a current collector.

The anode side channel plate 50 is a member formed by injection molding a mixture of carbon powder and phenol resin, and has a surface facing the gas diffusion layer 25 (see FIG. 1).
On the lower surface), ribs 56 are arranged in parallel in the x direction at regular intervals with the y direction as the longitudinal direction, thereby forming channels 55 for allowing the anode gas to flow in the same direction.

The cathode side channel plate 60 is a member substantially similar to the anode side channel plate 50, and although not visible in this figure, ribs are arranged in parallel at regular intervals in the x direction with the y direction as the longitudinal direction. Thus, a channel that allows the cathode gas to flow in the same direction is formed. Further, in order to form an internal manifold in the solid polymer film 21, gaskets 30, 40, anode side channel plate 50, and cathode side channel plate 60, openings 61 to 64, 41 to 44 are formed at the four corners of each main surface. , 211-21
4, 31-34, 51-54 (44, 214, 34, 5
4 is not shown), of which the openings 51, 5
3, 31, 33, 211, 213, 41, 43, 61,
The anode gas is supplied to the channel 55 of the anode side channel plate 50 by 63. In addition, the opening 52,
54, 32, 34, 212, 214, 42, 44, 6
Cathode gas is supplied to the channels of the cathode side channel plate 60 by the reference numerals 2 and 64.

The cell units 10 are actually stacked so that a high voltage and a high power can be taken out through a partition plate, and both ends thereof are fixed by a pair of end plates (cell stack). ing. Here, the main feature of the present embodiment is the configuration of the electrodes 22 and 23. Next, the configuration of the cell 20 centering on the electrodes 22 and 23 will be described in detail.

1-2. Cell constitution The solid polymer membrane 21 is made of a fluorine-based cation exchange resin such as perfluorocarbon sulfonic acid (for example, Na manufactured by DuPont).
It is an electrolyte membrane composed of fion112) and has a width of 7 cm in the x direction.
The length in the x direction is 7 cm and the thickness in the z direction is about 50 μm).
The electrodes 22 and 23 are both membrane electrodes slightly smaller than the solid polymer membrane 21 (width in the x direction: 5 cm x length in the y direction: 5 cm x z).
The thickness is about 40 μm in the direction, and the solid polymer film 21 is contact-processed by hot pressing in accordance with the central portions of both main surfaces. The gas diffusion layers 24 and 25 have the same size as the electrodes 22 and 23 (width 5 cm in x direction x length 5 in y direction).
cm × z direction thickness about 200 μm).

Here, FIG. 2A is a sectional view taken along the thickness direction (yz plane) of the cathode 22. As shown in the figure, the cathode 22 is formed by mixing two kinds of particles, and one particle sterically surrounds the other particle. Specifically, the two types of particles are the resin-coated carbon 221 and the catalyst-carrying carbon 2 shown in FIG.
22. The catalyst-supporting carbon 222 has a structure in which porous carbon particles 2221 carry catalyst (here, platinum) particles 2222. The resin-coated carbon 221 has a structure in which carbon particles 2221 are coated with a cation exchange resin 2211 as shown in FIG. The cation exchange resin 2211 is made of the same material as the solid polymer membrane 21. These particles 221, 2 adjacent to each other
22 pieces are pressure-bonded by hot pressing, and are kept in a state of being adhered to each other with a binder (polytetrafluoroethylene) (not shown) as shown in FIG.

Although the cathode 22 is described here, the anode 23 has the same structure in this embodiment. 1-3. Manufacturing Method of Cell Here, a manufacturing method of the cell 20 of the embodiment will be described.
The electrodes 22 and 23 have the same structure, but the present invention may be applied to at least one of them.

Prior to production, carbon powder (average particle size 1
6 nm), platinum-supporting carbon powder (average particle size 30 n
m), a commercially available 5 wt% Nafion solution (manufactured by Aldrich Chemical Co.) is prepared as a cation exchange resin. First, carbon powder is added to the Nafion solution, and this is mixed well.
Then, it is dried at about 80 ° C. in the air to obtain resin-coated carbon. The weight ratio of carbon to resin at this time will be described later in Examples.

The resin-coated carbon thus prepared is put into a binder / dispersant solution (PTFE / water) together with platinum-supporting carbon powder, and mixed (the weight ratio of carbon to PTFE is 100: 20). The ratio of resin-coated carbon and platinum-supporting carbon will be described later. Then, after sufficiently mixing, a filtration process is performed, and the obtained paste is rolled by a roller to complete an electrode having a thickness of 40 μm.

Next, as an electrolyte membrane, Nafion 11 manufactured by DuPont
2 (7 cm x 7 cm, thickness about 50 μm), carbon paper as a gas diffusion layer (5 cm x 5 cm, thickness about 200)
μm) is prepared. These are laminated in order of a diffusion layer, an electrode, an electrolyte membrane, an electrode, and a diffusion layer, and hot pressed (1
Integrate by 40 ° C., 30 kg / cm ² ). The cell 20 is completed by the above.

1-4. Operation of Fuel Cell and Effect of the Present Invention In such a fuel cell, the reforming gas is supplied to the anode side and the air is supplied to the cathode side during the operation. Then, hydrogen in the reformed gas (hydrogen gas) supplied to the anode 23 side via the gas diffusion layer 25 is converted into protons (H ₂ → 2).
H ⁺ + 2e ⁻ ) and moves in the solid polymer film 21 to the cathode 22 side. On the other hand, oxygen in the cathode gas supplied to the cathode 22 side through the gas diffusion layer 24 becomes oxygen ions (1 / 2O ₂ + 2e ⁻ → O ²⁻ ), and the protons that have moved in the solid polymer film 21. Combines to give water (2H ⁺ + O ²⁻ → H ₂ O). The water generated by this chemical reaction mechanism (power generation reaction) and the humidifying water supplied together with the reformed gas and the air bring the solid polymer film 21 into a wet state, and its internal resistance is lowered to exhibit conductivity.

In the conventional example shown in FIG. 6, the particles in the electrodes 122 and 123 (particles obtained by coating the catalyst-supporting carbon with the ion exchange resin) are not uniform in the coating thickness of the ion exchange resin. The resin is buried in a thick region to generate an inactive catalyst, which is a cause of hindering the efficiency of power generation. Further, while the inactive catalyst is present, the three-phase interface where the catalyst, the ion exchange resin and the gas layer are in contact with each other is not sufficiently secured, and there is a tendency that the electrode reaction is adversely affected.

On the other hand, in the present embodiment, the catalyst particles 2
222 is not entirely covered with the ion exchange resin, but the surface of the resin-coated carbon 221 (cation exchange resin 221
Since it is in contact with 1), even if the catalyst particles 2222 are covered with the cation exchange resin 2211, a local (non-uniform) coating is applied only to the portions where the two particles 221 and 222 are in contact with each other. Therefore, the catalyst particles 2222 are not embedded in the cation exchange resin 2211, and the inactivation of the catalyst is suppressed. In addition, resin-coated carbon 221
Since the catalyst-carrying carbon 222 and the catalyst-carrying carbon 222 are arranged so as to surround each other three-dimensionally, the catalyst particles 222 are different from the conventional one.
The contact property between 2 and the gas phase is also enhanced, the three-phase interface is well secured, and even with the same amount of catalyst, excellent power generation efficiency is exhibited under a smooth electrode reaction.

2. Manufacturing Method of Fuel Cell and Performance Evaluation Next, a method of manufacturing the cell of the above embodiment will be described as an example. After that, a performance evaluation experiment is conducted on the produced example, and the experiment result is examined. 2-1. Manufacturing Method of Example The manufacturing method of the example is the method described in 1-3 above. In addition, the following manufacturing method is used as a comparative example. Here, a method for manufacturing the electrode of the example is shown, and the other steps are performed in the same manner as the example.

An electrode of the comparative example is produced. Platinum-supporting carbon is added to the Nafion solution and mixed well. Then, the solvent is removed through a drying step to obtain resin-coated platinum-supporting carbon (weight ratio of platinum-supporting carbon: Nafion = 7: 3). This is put in a binder / dispersant (PTFE / water), mixed, filtered, rolled, and molded into a sheet to obtain a comparative electrode.

For the performance comparison experiment, the conditions for producing the resin-coated carbon and the catalyst-supporting carbon used in the fuel cell of the example are as follows. First, in the resin-coated carbon, the weight ratio of carbon: resin is set to 1: 0.8, and the weight ratio of catalyst-supporting carbon: resin-coated carbon is set to 1: 0.8.
Examples 1 to 5 shown in Table 1 are set by setting each value to 1 to 0.7.

[0032]

【table 1】

Further, the weight ratio of catalyst-carrying carbon: resin-coated carbon was fixed to 1: 0.3, and the resin-coated carbon with the weight ratio of carbon: resin varied from 1: 0.1 to 2 was used. Examples 6-14 produced and shown in Table 2
And

[0034]

[Table 2]

The weight ratio of catalyst-carrying carbon to resin-coated carbon is fixed to 1: 0.3, and the weight ratio of carbon to resin in resin-coated carbon is fixed to 1: 0.8.
The catalyst-supporting carbon having an average particle diameter of 55 nm and the resin-coated carbon having an average particle diameter in the range of 10 nm to 67 nm were prepared, and Examples 15 to 23 shown in Table 3 are prepared.

[0036]

[Table 3]

2-2. Performance Evaluation Experiment Next, the performance evaluation experiment is performed by operating the fuel cells of Examples 1 to 23 and the comparative example produced above. 2-2-1. Voltage-Current Density Characteristics of Examples 1 to 5 and Comparative Example (Experiment 1) The fuel cell was operated under the following conditions, and the mixture ratio of the catalyst-carrying carbon and the resin-coated carbon was voltage-current. Examine the effect on density characteristics. <Operating conditions> -Anode gas; hydrogen gas (1 atm, humidification temperature 80%)-Cathode gas; air (1 atm, humidification temperature 76%)-Anode gas utilization rate: 50% -Cathode gas utilization rate: 40%- Fuel cell operating temperature: 80 ° C. The experimental results are summarized in FIG.

2-2-2. Voltage Characteristics of Examples 2 and 6 to 14 (Experiment 2) In Experiment 2, the current density of the fuel cell was 500 mA / c.
The measurement is performed under the same conditions as the operating conditions of Experiment 1 except for the above conditions while keeping m ² . The results of this experiment are summarized in FIG. 2-2-3. Voltage Characteristics of Examples 15 to 23 (Experiment 3) In Experiment 3, the current density of the fuel cell was 500 mA / c.
The measurement is performed under the same operating conditions as in Experiment 1 except for the above, while maintaining m ² .

The results of this experiment are summarized in FIG. 2-3. Evaluation of Experimental Results As is clear from Table 1, it is shown that all of Examples 1 to 5 exhibit higher voltage values than Comparative Examples regardless of the value of the current density. This is considered to be because the electrodes of the examples were abundantly secured for the three-phase interface, which improved the power generation efficiency.

The performance of Example 5 is slightly close to that of the comparative example, but this is due to the fact that the resin-coated carbon is relatively large at about 7/10 (weight ratio) of the catalyst-supporting carbon. . That is, in Example 5, the amount of resin occupied in the electrode was large, and therefore the amount of gas supplied to the catalyst was small (the gas diffusibility was reduced), and the power generation efficiency was considered to be inferior. Although not shown as an example, when the resin-coated carbon is too small relative to the catalyst-carrying carbon contrary to the example 5, the three-phase interface cannot be sufficiently secured due to lack of the ion-exchange resin. Is not expected to improve.

From the above, in the present invention, it is desirable to set the weight ratio of resin-coated carbon / catalyst-carrying carbon to the range of 0.1 to 0.6 (the range of Examples 1 to 4).
Within this range, when the weight ratio is further adjusted to 0.3 as in Example 2, the most excellent power generation efficiency is exhibited. On the other hand, FIG. 4 shows Example 2 in which the weight ratio of resin-coated carbon / catalyst-carrying carbon was fixed to 0.3 and the weight ratio of resin / carbon in the resin-coated carbon was changed in the range of 0.1 to 2.0. And the battery performance of 6 to 14 are shown.
According to this figure, the weight ratio of resin / carbon is 0.2
.About.1.6 (Examples 2 and 7 to 13) is desirable, and it is clear that the best performance is obtained at 0.3 (Example 2).

Furthermore, when the resin / carbon weight ratio is 0.1 (Example 6), the formation of the three-phase interface is not sufficient.
In 0 (Example 14), the amount of gas was too large and the gas flow rate (gas diffusibility) was reduced, so that it was clarified that the voltage values were not excellent. Moreover, Examples 15 to 23 shown in FIG.
From the results, it is possible to obtain a high voltage by setting the average particle diameter of the resin-coated carbon to 0.2 to 1.0 times the particle diameter ratio of the catalyst-supporting carbon, and especially 0.4 to 0.9 times. It has been clarified that extremely excellent performance can be obtained by It is considered that this is because the amount of the three-phase interface could be increased by setting the average particle diameters of the resin-coated carbon and the catalyst-supporting carbon within the above range.

3. Other Matters In the above-mentioned embodiments and examples, examples using perfluorosulfonic acid (Nafion) as the ion exchange resin have been shown, but the present invention is not limited to this, and the proton is not limited thereto. Other ion exchange resins may be used as long as they have conductivity.

The present invention can also be applied to a fuel cell in which only the cathode side or the anode side is humidified, or a fuel cell in which neither the cathode side nor the anode side is humidified. Further, as the resin-coated carbon, carbon which does not support a catalyst and which is coated with a cation exchange resin is used in the embodiment. However, the present invention is not limited to this, and it does support a catalyst to some extent. Good. However, even if the catalyst is loaded on the resin-coated carbon, it is likely to be buried in the resin and become inactive, so the amount of catalyst supported on the resin-coated carbon should be set to be smaller than the amount of catalyst supported on the catalyst-loaded carbon. Is.

Further, the present invention uses so-called direct methanol fuel cell (DMFC: Direct Methanol Fuel Cell) in which hydrogen or a hydrogen-rich reformed gas is used as a fuel gas and methanol is directly supplied to the inside of the cell to generate electric power. )
May be applied to.

[0046]

As is apparent from the above, the present invention has a cell in which an anode and a cathode are arranged on both sides of an electrolyte membrane, and an anode gas is supplied to the anode side and a cathode gas is supplied to the cathode side. In a fuel cell for generating power, at least one of an anode and a cathode, and a first particle made of a conductive material coated with an ion exchange resin,
Second particles composed of a conductive material which is not coated with an ion exchange resin and which carries a catalyst ,
Since the particles are in contact with the second particles, in the electrode composed of the first particles and the second particles, the catalyst of the first particles comes into contact with the surface of the second particles (ion exchange resin). , And in contact with the gas phase (cathode gas or anode gas).
As a result, the three-phase interface including the catalyst, ion-exchange resin, and gas phase is secured in abundance as compared with the conventional electrode, and the power generation efficiency of the fuel cell is improved.

[0047] Such a fuel cell is to produce an anode and mosquitoes <br/> cathode, a manufacturing method of a fuel cell through the process of making these cells are placed on both sides of the electrolyte membrane, the anode and At the time of producing at least one electrode material of the cathode, the first particles made of a conductive material coated with an ion exchange resin and the ion exchange resin are not coated,
And a second particle having a catalyst made of a conductive material carried,
Can be obtained by going through the step of mixing.

[Brief description of drawings]

FIG. 1 is an assembly diagram showing a cell configuration of a polymer electrolyte fuel cell which is an application example of the present invention.

FIG. 2 is a partial view showing the structure of electrodes in the cell structure of the present invention. (A) is a partially enlarged view of an electrode. (B)
FIG. 3 is an enlarged view of catalyst-carrying carbon and resin-coated carbon in an electrode. (C) is an enlarged sectional view of resin-coated carbon.

FIG. 3 is a graph showing the fuel cell characteristics of Examples 1 to 5 and Comparative Example.

FIG. 4 is a graph showing the relationship between the amount of ion exchange resin (Nafion) used in the resin-coated carbon of Examples 2 and 6 to 14 and the voltage value.

FIG. 5 is a graph showing a relationship between a carbon average particle diameter ratio (resin-coated carbon / catalyst supporting carbon ratio) and a voltage value in Examples 15 to 23.

FIG. 6 is a partial view showing a structure of electrodes in a conventional cell structure. (A) is a partially enlarged view of an electrode. (B) is an enlarged sectional view of carbon particles (carbon coated with a resin coated catalyst) in the electrode.

[Explanation of symbols]

10 cell unit 20 cells 21 Solid polymer membrane 22 Cathode (catalyst layer) 23 Anode (catalyst layer) 24, 25 Gas diffusion layer (current collector) 221 resin coated carbon 222 Catalyst supported carbon 2221 carbon particles 2222 catalyst (platinum) particles

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ikuro Yonezu 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (56) Reference JP-A-5-283084 (JP, A) JP JP-A-4-162365 (JP, A) JP-A-10-241703 (JP, A) JP-A-1-143151 (JP, A) JP-A-6-251781 (JP, A) JP-A-11-126615 (JP , A) JP-A-8-227716 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01M 4/86-4/98 H01M 8/00-8/24

Claims (2)

(57) [Claims] [Claim 1] to produce an anode and a cathode, a manufacturing method of a fuel cell through the step of preparing a cell by disposing these on both sides of <br/> electrolyte membrane, an anode and a cathode at least one of the electrodes At the time of production
Mixed Oite, a first particle ion-exchange resin is made of a conductive material coated, without ion exchange resin is coated, and a second particle having a catalyst made of a conductive material carried, the
A method of manufacturing a fuel cell , characterized by comprising a step of combining
Law . 2. From a conductive material coated with an ion exchange resin
The first particles and the ion-exchange resin are not coated,
And a second particle made of a conductive material carrying a catalyst,
A fuel cell battery characterized by comprising a step of mixing
Method of manufacturing poles.