JP5173458B2 - Fuel cell cell tube seal structure and fuel cell module - Google Patents

Description

  The present invention relates to a sealing structure for a cell tube for a fuel cell in which the sealing property of a cell tube of a cylindrical fuel cell is improved and the power generation characteristics of the fuel cell are improved, and a fuel cell module employing the sealing structure.

  A schematic structure of the cylindrical solid electrolyte fuel cell module is shown in FIG. FIG. 5 is a schematic perspective view of the cell tube portion, and FIG. 6 is a schematic diagram of a seal structure at the end of the cell tube.

  As shown in FIG. 4, a top plate 02, an upper tube plate 03, and a lower tube plate 04 are disposed in a module body 01 surrounded by a heat insulating material, and a battery chamber 01a is disposed below the lower tube plate 04. Is formed. On the other hand, a fuel supply chamber 05 is formed between the top plate 02 and the upper tube plate 03 of the module body 01. A fuel discharge chamber 06 is formed between the upper tube plate 03 and the lower tube plate 04.

  An outer pipe 07 that connects the fuel supply chamber 05 and the outside of the module main body 01 is connected to the top plate 02 of the fuel supply chamber 05 through the module main body 01. Inside the outer tube 07, an inner tube 08 that penetrates the upper tube plate 03 is disposed so as to communicate the fuel discharge chamber 06 with the outside of the module body 01.

The lower tube plate 04 has a cell tube 010 formed by forming a single cell membrane (not shown) on the outer peripheral surface thereof, the upper end thereof being positioned in the fuel discharge chamber 06, and the lower side thereof being the battery chamber of the module main body 01. Through-holes are supported so as to be positioned within 01a.
Inside the cell tube 010, a fuel injection pipe 011 penetrating the upper tube plate 03 is disposed so as to communicate the inside lower side of the cell tube 010 and the fuel supply chamber 05.

  Inside the fuel injection pipe 011, a current collecting rod 012 having an upper end positioned in the fuel supply chamber 05 and a lower end positioned in the vicinity of the lower end of the cell tube 010 is disposed. The lower end of the current collecting rod 012 is electrically connected to the unit cell membrane and connected to a current collecting member 013 that closes the lower end of the cell tube 010. The upper end of the current collecting rod 012 is electrically connected to the outside of the module main body 010 via a nickel current collecting member 013 and a conductive rod 014.

  On the other hand, a current collecting connector 015 that is electrically connected to the cell membrane is attached to the upper end of the cell tube 010. The current collecting connector 015 is connected to the other cell tube 010 and the current collecting connector 015. Connected in series.

A porous ceramic partition plate 016 is provided below the battery chamber 01a of the module body 01. An air preheating chamber 017 that communicates with the battery chamber 01a via the partition plate 016 is provided below the partition plate 016. The air preheating chamber 017 includes air that communicates with the outside of the module body 01. A supply pipe 018 is connected.
Further, one end side of the air discharge pipe 019 is located inside the battery chamber 01a of the module body 01. The air discharge pipe 019 has the other end located outside the module main body 01, and the middle part is disposed so as to pass through the inside of the air preheating chamber 017 so that heat is exchanged.

  As shown in FIGS. 5 and 6, the cell tube 010 is formed by sequentially laminating a fuel electrode 032c, an electrolyte 032b, and an air electrode 032a on the surface of the base tube 031 so as to be suspended from the lower tube plate 04 of the module body 01. Furthermore, a dense conductive connecting material (interconnector) 033 for connecting the fuel electrode and the air electrode is laminated to form a plurality of unit cell films 032 in a horizontal stripe shape. That is, the unit cell membrane 032 is constituted by the fuel electrode 032c, the solid electrolyte 032b, and the air electrode 032a laminated on the substrate tube 031. The interconnector 033 connects the inside and outside of the substrate tube 031 between the unit cell membranes. The gap is sealed and the cell membranes 032 are connected in series.

The membrane structure of the sealing portion of the cell tube 010 will be described with reference to FIGS. As shown in FIG. 6, on the outer peripheral surface on the lower end side of the base tube (15% CaO—ZrO ₂ ) 031, an air electrode 032 a located on the most other end side of the base tube 031 is connected via an interconnector 033. A lead film (Ni—Al) 034 to be connected is formed. The lead film 034 is provided with an end current collecting member 013 and is collected by a current collecting rod 012.
In addition, a highly airtight film (Al ₂ O ₃ ) 035 is formed on the upper surface of the lead film 034, and a cap-shaped seal member 037 is fixed via an inorganic adhesive 036 as shown in FIG. Has been.
The outer peripheral surface in the vicinity of the upper end of the base tube 031 on the lower tube plate 04 side has a similar sealing structure.

  Since the airtight film 035 is porous with a porosity of about 5 to 10%, the film thickness is increased to about 100 to 150 μm in order to prevent gas escape and oxidation of the lower lead film 034. ing.

Next, the operation of the cylindrical solid electrolyte fuel cell module having such a structure will be described. The inside of the battery chamber 01a of the module main body 01 is heated to an operating temperature (about 900 to 1000 ° C.), fuel gas 020 such as hydrogen is supplied from the outer pipe 07, and air 021 which is oxidant gas is supplied from the air supply pipe 018. Supply.
The fuel gas 020 supplied via the outer pipe 07 flows from the fuel supply pipe 05 to the lower end side of the cell tube 010 via the injection pipe 011.
On the other hand, the air 021 that has passed through the partition 016 passes through the air preheating chamber 017 and flows into the battery chamber 01a.

  When the fuel gas 020 passes through the porous base tube 031 and is supplied to the fuel electrode 032c of the single cell membrane 032 and the air (oxygen) 021 contacts the air electrode 032a, the single cell membrane 032 The air (oxygen) is electrochemically generated to generate electric power, and the electric power is sent to the outside through the current collecting member 013 and the conductive rod 014.

  The remaining fuel gas 022 after being used for power generation flows into the fuel outlet chamber 06 from the upper end of the cell tube 010, is discharged outside through the inner pipe 08, and is reused. On the other hand, the remaining air 023 after being used for power generation is discharged to the outside through the air discharge pipe 019.

On the other hand, Patent Document 1 (Japanese Patent No. 3495654) is known for such a cylindrical solid electrolyte fuel cell module, and in Patent Document 1, a sealing portion of a cell tube is shown in FIG. The membrane structure is shown.
In Patent Document 1, a conductive lead film 034 formed on the surface of the base tube 031 of the cell tube 010, a highly confidential airtight film 035 formed on the surface of the lead film 034, A cell tube sealing structure is shown in which an adhesion improving film 040 having a large surface roughness is provided on the surface of the airtight film 035, and an adhesive 036 is applied to the surface of the adhesion improving film 040 and a sealing member 037 is adhered thereto. Has been.

When the airtight film 035 or the like is formed on the surface of the base tube 031, the airtight film created by the sintering method has a surface roughness higher than that of the airtight film obtained by the thermal spraying method. It is extremely small, and the surface roughness is about 10 to 15 μm in the thermal spraying method, whereas it is extremely small as about 2 to 5 μm in the sintering method.
For this reason, poor adhesion between the adhesive 036 and the airtight film 035 is likely to occur. However, the adhesive improvement film 040 is formed between the airtight film 035 and the adhesive 036 by a sintering method. The problem of the airtight film 035 is solved to improve the sealing performance with the sealing member 037.

Further, in Patent Document 1, the adhesion improving film 040 is made of calcium titanate (CaTiO ₃ ), magnesium aluminum oxide (MgAl ₂ O ₄ ), calcia stabilized zirconia (CSZ), yttrium stabilized zirconia (YSZ). It is shown to consist of any one or a mixture thereof.
Japanese Patent No. 3495654

However, in the seal structure shown in Patent Document 1, as described above, the adhesion improving film 040 includes calcium titanate (CaTiO ₃ ), magnesium aluminum oxide (MgAl ₂ O ₄ ), calcia-stabilized zirconia ( CSZ), only one of yttrium-stabilized zirconia (YSZ) or a mixture thereof is shown, and suitable distribution ratios and particle sizes of these material compositions are specifically shown. In order to further improve the sealing performance, further improvements including the blending ratio of materials and the like are necessary.

  Therefore, the present invention has been made in view of such a background, and the material distribution ratio that satisfies the surface roughness required for the adhesion improving film and the prevention of cracking due to repeated temperature increase and decrease, etc. Further, by setting the particle size condition of the material, etc., a sealing structure for a fuel cell cell tube that can secure a sufficient sealing property for a long time and provide a highly reliable adhesion improving film, and the sealing structure It is an object to provide an adopted fuel cell module.

In order to solve the above-mentioned problems, the present invention according to the seal structure of a fuel cell cell tube comprises forming a fuel electrode and an air electrode by a sintering method with a solid electrolyte interposed on the surface of a fuel cell base tube. A cell tube comprising a single cell membrane, a conductive lead film formed on the surface of a base tube of the cell tube, and a highly airtight film formed on the surface of the lead film, A cell tube sealing structure for a fuel cell comprising an adhesion improving film having a large surface roughness provided on the surface of the airtight film, and an adhesive is applied to the surface of the adhesion improving film and a sealing member is adhered thereto in the adhesive properties improved membrane calcium titanate (CaTiO _3), consists of a one of calcia-stabilized zirconia (CSZ) or yttrium stabilized zirconia (YSZ), CaTiO ₃ is 20 to 40 The CSZ or YSZ is composed of a mixture of a coarse component and a fine component having different particle diameters, and the coarse component is 20%. 50 vol% seen including, the coarse particle component has an average particle diameter of 20 [mu] m, the fine component, wherein an average particle diameter of several [mu] m.

According to this invention, the adhesion improving film is made of calcium titanate (CaTiO ₃ ) as a base, calcia-stabilized zirconia (CSZ) or yttrium-stabilized zirconia (YSZ) is added thereto, and the CaTiO ₃ is added to 20 to 20%. By making the blending ratio of 40% by volume and 80-60% by volume of CSZ or YSZ, the durability of the adhesion improving film against thermal fatigue (heat cycle) is improved and a highly reliable seal structure is obtained. Can do.

In other words, if CSZ or YSZ is contained in a large amount, the coefficient of thermal expansion with respect to the base material becomes small and sufficient adhesion to the base material cannot be obtained. When CSZ or YSZ is contains a large amount of CaTiO ₃ in a small amount, the thermal expansion coefficient becomes large, it becomes prone to cracking not withstand the repeated lifting of temperature, a CaTiO ₃ in consideration of the durability against thermal cycle It is preferable to set the distribution ratio of 20 to 40% by volume and CSZ or YSZ to 80 to 60% by volume.

Furthermore, according to the present invention, the CSZ or YSZ is composed of a mixture of a coarse particle component and a fine particle component each having a different particle size, so that the filling property of the CSZ or YSZ composition can be improved.
In other words, as the fine particle component increases, during sintering, it becomes too solid, and cracking is likely to occur due to shrinkage of the solidification, and as the fine particle component decreases and the coarse particle component increases, the component becomes coarse and sintered. Since it becomes difficult to be brittle and does not harden by adhering as a film, the filling property of the composition of CSZ or YSZ can be improved by appropriately distributing a mixture of coarse and fine components having different particle sizes.

  Furthermore, according to this invention, the crack in the case of sintering of an adhesive improvement film | membrane is prevented as mentioned above by including a coarse-grain component 20-50 volume%. Furthermore, the adhesion to the surface of the base tube, that is, the adhesion to the airtight film, is ensured by the shrinkage of solidification during sintering, and the durability of the adhesion improving film is improved.

It is preferred that the fine particle component before Symbol CSZ or YSZ, the sum of the CaTiO ₃ comprises 60 to 80 vol%.
According to this configuration, the coarse particle component CSZ or YSZ having an average particle size of 20 μm is contained in an amount of 20 to 50% by volume, and the sum of the fine particle component CSZ or YSZ having an average particle size of several μm and CaTiO ₃ is contained in an amount of 80 to 60% by volume. Thus, the adhesion improving film can be baked and hardened as a film without causing cracks in the sintering method, and the adhesion to the airtight film can be ensured. Further, the surface roughness is 40 μm or more, and sufficient adhesiveness with the adhesive can be obtained.
As a result, it is possible to provide an adhesion improving film that can reliably prevent leakage of fuel gas, and to improve the durability of the adhesion improving film.

Furthermore, the present invention is, by supplying to the cell tube obtained by forming a unit cell film and the oxidizing agent gas and the fuel gas to the outer peripheral surface of the battery compartment under operating temperature environment, before and the oxidant gas Ki燃 In a cylindrical solid electrolyte fuel cell module in which a fuel gas is electrochemically reacted to obtain electric power, the fuel cell cell tube seal structure provided with the above-described adhesion improving film is used. .

  According to this invention, by using the sealing structure of the fuel cell cell tube provided with the adhesion improving film as described above, the leak rate of the fuel gas can be greatly reduced, and the sealing performance can be secured over a long period of time. Therefore, stable fuel cell power generation over a long period of time becomes possible.

  According to the present invention, the surface roughness required for the adhesion-improving film, the material distribution ratio that satisfies the prevention of cracking due to repeated temperature rise and fall, and the particle size condition of the material are set. Thus, it is possible to provide a fuel cell cell tube seal structure that can secure a sufficient sealing property over a long period of time and provide a highly reliable adhesion improving film, and a fuel cell module that employs the seal structure.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Only.

An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram illustrating an example of a seal structure of a cell tube 2 according to the present embodiment. The fuel cell module to which the cell tube 2 is attached has the same structure as that described in FIG. 3 of the prior art. The seal portion is provided at the lower end portion of the base tube 4 and the side portion where the cell tube 2 is suspended.
A cell tube 2 formed by forming a fuel cell and an air electrode on a surface of a fuel cell substrate tube (substrate tube) 4 with a solid electrolyte interposed therebetween to form a unit cell membrane 6, the cell tube The adhesive improvement film | membrane with a large surface roughness is provided in 2 sealing parts.

As shown in FIG. 2, the film configuration of the seal portion including the adhesion improving film is a conductive lead film (for example, formed on the surface of a base tube (for example, 15% CaO—ZrO ₂ or the like) 4). Ni—MgAl ₂ O ₄ etc.) 8 and a highly airtight film (for example, 8% Y ₂ O ₃ —ZrO ₂ etc.) 10 formed on the surface of the lead film 8. An adhesive improvement film 12 is provided, and an inorganic adhesive 14 is applied to the surface of the adhesive improvement film 12 so that a seal member 16 is adhered thereto.
The adhesion improving film 12 is formed by further sintering the raw material on the lead film 8 and the airtight film 10 sintered on the surface of the base tube 4 by the sintering method.

The performance required for the adhesion improving film 12 is required to have the following points (1) to (3).
(1) The material is a film that is strong against oxidation and reduction.
This is because the upper seal portion that suspends the cell tube 2 in FIG. 1 (see the lower tube plate 04 in FIG. 3) is exposed to both the oxidizing atmosphere and the reducing atmosphere, and therefore deteriorates. This is because it needs to be prevented.
(2) The material does not react with the airtight film 10 below the adhesion improving film 12.
This is because it is necessary to prevent deterioration due to reaction with the lower hermetic film 10.
(3) The thermal expansion coefficient of the base tube 4 and the thermal expansion coefficient of the adhesion improving film 12 are close.
This is because when the power generation of the fuel cell is repeated, the temperature at the time of power generation is as high as around 900 ° C., and it is necessary to prevent cracking due to repeated temperature rise and fall.

Calcium titanate (CaTiO ₃ ), calcia stabilized zirconia (CSZ), and yttrium stabilized zirconia (YSZ) are selected as materials that satisfy the above performance.
Then, mainly calcium titanate (CaTiO ₃ ), calcia stabilized zirconia (CSZ) or yttrium stabilized zirconia (YSZ) is added, CaTiO ₃ is 20 to 40% by volume, and CSZ or YSZ is 80 to 60% by volume. It is comprised by the mixture containing these. By adopting such a composition distribution, the durability against thermal fatigue of the adhesion improving film 12 is improved.

In other words, if CSZ or YSZ is contained in a large amount, the coefficient of thermal expansion with respect to the base material becomes small and sufficient adhesion to the base material cannot be obtained. When CSZ or YSZ is contains a large amount of CaTiO ₃ in a small amount, the thermal expansion coefficient becomes large, it becomes prone to cracking not withstand the repeated lifting of temperature, a CaTiO ₃ in consideration of the durability against thermal cycle By setting the distribution ratio of 20 to 40% by volume and CSZ or YSZ to 80 to 60% by volume, the durability of the adhesion improving film against thermal fatigue is improved.

Further, calcia-stabilized zirconia (CSZ) or yttrium-stabilized zirconia (YSZ) added to calcium titanate (CaTiO ₃ ) is composed of a mixture of a coarse particle component having an average particle size of 20 μm and a fine particle component having an average particle size of several μm.
By mixing the coarse particle component (20 μm) and the fine particle component (several μm), the filling property of the composition can be improved.

  In other words, as the fine particle component increases, during sintering, it becomes too solid, and cracking is likely to occur due to shrinkage of the solidification, and as the fine particle component decreases and the coarse particle component increases, the component becomes coarse and sintered. Since it becomes difficult to be brittle and does not harden by adhering as a film, the filling property of the composition of CSZ and YSZ can be improved by appropriately distributing a mixture of coarse and fine components having different particle sizes.

  By making the coarse-grained component 20 to 50% by volume, the adhesion-improving film 12 is prevented from cracking during sintering, and the adhesion to the surface of the substrate tube due to the shrinkage of solidification during sintering, that is, The adhesion to the airtight film 10 can be ensured, and the durability of the adhesion improving film can be improved.

Furthermore, 20 to 50% by volume of CSZ or YSZ as a coarse particle component having an average particle size of 20 μm is contained, and 80 to 60% by volume of CSZ or YSZ and CaTiO 3 as fine particle components having an average particle size of several μm are included.
When CSZ or YSZ of the coarse-grained component having an average particle size of 20 μm exceeds 20 to 50% by volume, the coarse-grained component increases to make it difficult to sinter and become brittle, and adheres as a film and is not baked and hardened.
Moreover, when CSZ or YSZ and CaTiO3 of the fine particle component having an average particle size of several μm exceed 80 to 60% by volume, the fine particle component increases, and cracking is likely to occur due to shrinkage of the sintered solidification.

Therefore, by blending 20 to 50% by volume of the coarse-grained component and 80 to 60% by volume of the fine-grained component, the adhesiveness to the airtight film 10 can be ensured by baking as a film without cracking in the sintering process. Can do. Further, the surface roughness is 40 μm or more, and sufficient adhesiveness with the adhesive can be obtained.
As a result, it is possible to provide an adhesion improving film that can surely prevent fuel gas leakage, and to obtain an adhesion improving film that improves durability.

The blending conditions of the above material components and the particle size conditions are set based on experimental results, and the experimental results will be described in the following examples.
A summary of the experimental results is shown in the chart of FIG. In addition, in FIG. 3, the component ratio of a conventional condition and also the component ratio of Comparative Examples 1-10 are also shown.
In the experimental results, the quality of the adhesion improving film was evaluated by three items: evaluation by a scratch test (JIS H8305), evaluation by a measurement result of surface roughness, and evaluation by a heat cycle test.

In the scratch test, a plurality of squares are cut out in a lattice shape by a cutter on the surface of the adhesion improving film 12 sintered on the base material, and it is examined whether or not the films of the square parts are peeled off under predetermined conditions.
The test shown in JIS H8305 is a method for judging the adhesion of zinc and aluminum alloy sprayed coatings applied to steel products for the purpose of corrosion protection. It was used for judgment.

Further, the surface roughness was measured using a roughness meter, and it was measured whether there was a roughness of 40 μm or more as a reference value. It has been confirmed in advance by a pull-out test that adhesiveness with an adhesive can be sufficiently obtained when the thickness is 40 μm or more. The upper limit of the surface roughness is not limited, but is preferably less than 700 μm from past experimental results.
The heat cycle test repeats at least one rise and fall between normal temperature and 1000 ° C., and examines whether the adhesion improving film 12 is cracked due to a difference in thermal expansion coefficient.

(Examples 1-3)
The three evaluation items were evaluated when the YSZ coarse particles were kept constant at 30%, CaTiO ₃ was changed to 20, 30, and 40%, and the YSZ fine particles were changed to 50, 40, and 30%. As a result, satisfactory results were obtained.
When CaTiO ₃ was out of the range of 20 to 40%, that is, when it was 10% and 50% as shown in Comparative Examples 3 and 4, the heat cycle properties were incompatible with both Comparative Examples 3 and 4.
This is considered that the heat cycle property became incompatible because the blending ratio of CaTiO ₃ and CSZ or YSZ affected the coefficient of thermal expansion.

(Examples 4 to 6)
Next, when the CaTiO ₃ is kept constant at 30%, the coarse grains of YSZ are changed to 20, 40, 50% and the fine grains of YSZ are changed to 50, 30, 20%. Judged. In both cases, satisfactory results were obtained.
When the coarse particles of YSZ were out of the range of 20 to 50%, that is, 10 or 60% as shown in Comparative Examples 5 and 6, the scratch test and the heat cycle property became incompatible.
This is because the blending ratio of fine particles and coarse particles is not in an appropriate range, and as the fine particle component increases, it becomes harder to solidify during sintering, and cracking tends to occur due to shrinkage of the sintered solidification. This is considered to be because the components became coarse and became difficult to sinter and become brittle as the amount of coarse components increased and the amount of coarse particles increased, and it became difficult to adhere and harden as a film.

(Examples 7 to 9)
While Examples 1 to 3 had YSZ coarse particles kept constant by 30%, Examples 7 to 9 were examples in which CSZ coarse particles were made 30% constant, similar to Examples 1 to 3 above. I can say that.
That is, when CaTiO ₃ is out of the range of 20 to 40%, that is, when it becomes 10% or 50% as shown in Comparative Examples 9 and 10, the heat cycle property becomes incompatible.
This is considered that the heat cycle property became incompatible because the blending ratio of CaTiO3 and CSZ or YSZ affected the coefficient of thermal expansion.

  According to the present invention, the surface roughness required for the adhesion-improving film, the material distribution ratio that satisfies the prevention of cracking due to repeated temperature rise and fall, and the particle size condition of the material are set. Since a sufficient sealing property can be secured over a long period of time and a highly reliable adhesion improving film can be obtained, it is useful for application to a fuel cell module employing the sealing structure of a fuel cell cell tube and the sealing structure. It is.

It is the schematic of the sealing structure of the cell tube of this invention. It is explanatory drawing which shows the film | membrane structure of a seal part. It is a table | surface which shows the adhesiveness and surface roughness which are a compounding component of the adhesive improvement film | membrane of Comparative Examples 1-10 and Examples 1-9, and an evaluation test result. It is explanatory drawing which shows schematic structure of a cylindrical solid electrolyte fuel cell module. It is a perspective schematic diagram of a cell tube part. It is the schematic of the sealing structure of a cell tube edge part. It is a film | membrane structural view of the seal part explaining a prior art. It is a film | membrane structural view of the seal part explaining a prior art.

Explanation of symbols

2 Cell tube 4 Substrate tube 6 Single cell membrane 8 Lead membrane 10 Airtight membrane 12 Adhesion improving membrane 14 Adhesive 16 Seal member

Claims (3)

A cell tube comprising a single cell membrane by forming a fuel electrode and an air electrode by a sintering method with a solid electrolyte interposed on the surface of a base tube for a fuel cell,
It consists of a conductive lead film formed on the surface of the base tube of the cell tube and a highly airtight film formed on the surface of the lead film. The surface of the airtight film has a large surface roughness. In the sealing structure of a fuel cell cell tube, which is provided with an adhesion improving film, and an adhesive is applied to the surface of the adhesion improving film and the sealing member is adhered to the surface.
The adhesion improving film is composed of calcium titanate (CaTiO ₃ ) and either calcia-stabilized zirconia (CSZ) or yttrium-stabilized zirconia (YSZ), and CaTiO ₃ is 20 to 40% by volume, CSZ or YSZ. There is composed of a mixture of 80 to 60 vol%, further, the CSZ or YSZ consists of a mixture of the respective particle diameters different from coarse components and fine components, coarse component unrealized 20-50 vol%, The seal structure of a fuel cell cell tube, wherein the coarse particle component has an average particle diameter of 20 μm, and the fine particle component has an average particle diameter of several μm . The CSZ or a fine component of YSZ, the sealing structure according to claim 1 Symbol placement of fuel cell tube total, characterized in that it comprises 60 to 80 volume% of the CaTiO3. By supplying the oxygen-containing gas and the fuel gas and the operating temperature environment of the battery compartment cell tube to the outer circumferential surface formed by forming a unit cell membranes, electrochemical and said oxidant gas and before Ki燃 material gas In the cylindrical solid electrolyte fuel cell module which is made to react and obtain electric power,
Fuel cell module characterized by using the claim 1 or 2 seal structure of fuel cell tube according.

Images