KR20190026181A - Solid oxide fuel cell - Google Patents

Abstract

The present invention relates to a solid oxide fuel cell. More particularly, the present invention relates to a solid oxide fuel cell which comprises a victim cell module including a substance capable of an adsorbing reaction with chromium at a front end portion of a unit cell module, and in which the victim cell adsorbs the chromium generated during the driving of the solid oxide fuel cell to reduce the movement of chromium, thereby effectively preventing a chromium poisoning phenomenon.

Description

[0001] SOLID OXIDE FUEL CELL [0002]

The present invention relates to a solid oxide fuel cell, and more particularly, to a solid oxide fuel cell in which a sacrificial cell module including a substance capable of adsorbing reaction with chromium is formed at a front end of a unit cell module, The present invention relates to a solid oxide fuel cell that effectively prevents chromium poisoning by reducing the movement of chromium by adsorption reaction with chromium generated when the battery is driven.

Recently, as energy resources such as petroleum and coal are depleted, interest in alternative energy that can replace them is increasing. As one of these alternative energies, attention has been paid to the unit cells, and research has been actively carried out with the advantage that the fuel is abundant without discharging pollutants and high efficiency. Generally, a unit cell is formed with an air electrode and a fuel electrode on both sides of an electrolyte, and the fuel electrode is composed of an anode and the air electrode is composed of a cathode. When fuel is supplied to the fuel electrode, the fuel is oxidized and electrons are discharged through an external circuit. , It receives electrons from the external circuit and is reduced to oxygen ions. The reduced oxygen ions migrate to the fuel electrode through the electrolyte and react with the oxidized fuel to produce water. Among these unit cells, the solid oxide unit cell (SOFC) is a unit cell which is operated at a high temperature of about 600 ° C. to 1000 ° C. by using stabilized zirconia as an electrolyte. The other unit carbonate cell unit (MCFC), the phosphate type unit cell ), Polymer type unit cells (PEFC), and the like, which are the most efficient and have less pollution, have no electrolyte loss, and do not require electrolyte replenishment.

On the other hand, a solid oxide fuel cell in which solid oxide unit cells are stacked is classified into a plate type, a tubular type and a flat tubular type, which can be classified according to the structure in which the solid oxide unit cells are arranged. Such a solid oxide fuel cell operates at a high temperature of 600 ° C or higher, where volatilization of the chromium occurs in the metal member in the solid oxide fuel cell, Causing the poisoning of chromium at the electrolyte interface, resulting in a decrease in the durability of the fuel cell. Thus, conventional solid oxide fuel cells can prevent the volatilization of chromium by forming a barrier coating between the cathode and the interconnect.

However, such a conventional solid oxide fuel cell has a problem of preventing the poisoning of chromium at the cathode and the electrolyte interface due to the volatilization of chromium, and in particular, does not effectively prevent the poisoning of chromium at the cathode and the electrolyte interface Had a problem.

In addition, the conventional solid oxide fuel cell has a problem that the process of the solid oxide fuel cell is complicated by adding a process of forming a separate barrier coating in the fuel cell. In particular, .

In order to solve the problems of the conventional solid oxide fuel cell, the inventor of the present invention constructed a sacrificial cell module including a substance capable of adsorbing reaction with chromium in the front end portion of the unit cell module, The present invention relates to a solid oxide fuel cell that effectively prevents chromium poisoning due to reduction of chromium migration by adsorption reaction with chromium generated when a solid oxide fuel cell is driven.

Japanese Patent No. 05607903

According to one embodiment of the present invention, a sacrificial cell module including a substance capable of adsorbing reaction with chromium is formed at a front end of a unit cell module, and the sacrificial cell module is formed by driving a solid oxide fuel cell And to provide a solid oxide fuel cell capable of effectively preventing the poisoning of chromium between the cathode and the electrolyte interface in the fuel cell by performing adsorption reaction with volatile chromium.

It is another object of the present invention to provide a method of manufacturing a solid-state imaging device in which a sacrificial cell module, which does not require a complicated process, is formed at the front end of a unit cell module, thereby preventing chromium poisoning, Oxide fuel cell.

A solid oxide fuel cell according to the present invention includes: a unit cell module including a unit cell and an interconnect disposed on both sides of the unit cell; And a sacrificial cell module including a sacrificial cell and interconnects disposed on both sides of the sacrificial cell, wherein the sacrificial cell comprises a material that adsorbs and reacts with chromium to reduce the movement of chromium .

According to one embodiment, the material is characterized in that it comprises lanthanum strontium cobalt oxide (La _{1- x} Sr _x CoO ₃ ).

According to one embodiment, the sacrificial cell is characterized in that the content of lanthanum strontium cobalt oxide (La _{1 - x} Sr _x CoO ₃ ) is larger than that of the unit cell.

According to an embodiment of the present invention, the sacrificial cell module is located at a front end of the unit cell module.

According to one embodiment, the solid oxide fuel cell comprises one of a planar type solid oxide fuel cell, a tube type solid oxide fuel cell, and a flat-tube type fuel cell, And is provided as a battery.

According to an embodiment, the unit cell module and the sacrificial cell module are electrically separated from each other by forming a separation distance between the unit cell module and the sacrificial cell module or by inserting an insulator.

According to one embodiment, the solid oxide fuel cell further comprises an electric loader for separately driving the sacrificial cell module.

According to an aspect of the present invention, a sacrificial cell module including a substance capable of adsorbing reaction with chromium is formed at a front end of a unit cell module, and the sacrificial cell module includes volatile chromium The adsorption reaction is advantageous in that the chromium poisoning phenomenon can be effectively prevented between the cathode and the electrolyte interface in the fuel cell.

In addition, by forming a sacrificial cell module which does not require a complicated process at the front end of the unit cell module, it is possible to prevent the poisoning of chromium and to maintain the overall system price.

FIG. 1 is a view schematically showing a configuration of a solid oxide fuel cell 1000 according to an embodiment of the present invention.
FIG. 2 is a view schematically showing a configuration of a sacrificial cell module 100 according to an embodiment of the present invention.
FIG. 3 is a view schematically showing a configuration of a sacrificial cell 110 according to an embodiment of the present invention.
FIG. 4 is a view schematically showing a configuration of a unit cell module 200 according to an embodiment of the present invention.

The present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, a detailed description of known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted. The embodiments of the present invention are provided to fully explain the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

Throughout the specification, when a section is referred to as " comprising " a section, it means that the section may include other elements, not excluding the other elements, unless specifically excluded.

Hereinafter, preferred embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are provided only for the better understanding of the present invention, and the present invention is not limited by the examples.

<Solid Oxide Fuel Cell>

FIG. 1 is a view schematically showing a configuration of a solid oxide fuel cell 1000 according to an embodiment of the present invention, and FIG. 2 is a view schematically showing a configuration of a sacrificial cell module 100 according to an embodiment . FIG. 3 is a schematic view of a configuration of a sacrificial cell 110 according to an embodiment. FIG. 4 is a view schematically showing the configuration of a unit cell module 200 according to an embodiment. Referring to FIG.

A solid oxide fuel cell 1000 according to an embodiment of the present invention includes a sacrificial cell module 100, a unit cell module 200, a first gas supply unit 300, a second gas supply unit 400, and an electric loader 500 And the sacrificial cell module 100 may include a sacrificial cell 110 and an interconnector 120. The unit cell module 200 may include a unit cell 210 and an interconnector 120. [ (220).

Here, the solid oxide fuel cell 1000 may be any one of a planar type solid oxide fuel cell, a tube type solid oxide fuel cell, and a flat-tube type fuel cell, Lt; / RTI &gt;

That is, depending on the type of the solid oxide fuel cell 1000, the arrangement of the sacrificial cell module 100, the unit cell module 200, the first gas supply unit 300, the second gas supply unit 400 and the electric loader 500 The structure can be changed.

In one embodiment, when the solid oxide fuel cell 1000 is provided in the form of a planar solid oxide fuel cell, the sacrificial cell module 100 and the unit cell module 200 may be stacked vertically The unit cell module 200 and the sacrificial cell module 100 may be electrically isolated by disposing an insulator between the unit cell module 200 and the sacrificial cell module 100 or by physically separating the unit cell module 200 and the sacrificial cell module 100 from each other.

For example, a mica material is disposed between the interconnector 220 of the unit cell module 200 and the interconnector 120 of the sacrificial cell module 100 located at the front end of the unit cell module 200 So that the sacrificial cell module 100 and the unit cell module 200 are electrically separated and can be driven separately.

First, the number of sacrificial cell modules 100 may be configured in one or more solid oxide fuel cells 1000 and may be less than the number of unit cell modules 200.

The sacrificial cell module 100 may be positioned at the front end of the unit cell module 200 in the solid oxide fuel cell 1000 where the front end of the unit cell module 200 is the first location where the gas is supplied It can be said that the gas is first contacted.

For example, if the first gas supply unit 300 and the second gas supply unit 400 are formed at the upper end, the sacrificial cell module 100 is connected to the solid oxide fuel cell 1000 as the front end of the unit cell module 200, If the first gas supply unit 300 and the second gas supply unit 400 are formed at the lower end of the unit cell module 200, the sacrificial cell module 100 may be disposed at the upper end of the unit cell module 200, And may be disposed at the lower end of the battery 1000.

In the sacrificial cell module 100, the sacrificial cell 110 may be located between the interconnectors 120, the size of the sacrificial cell 110 may be less than or equal to the size of the interconnector 120, And the shape of the interconnector 120 may be the same as each other. The thickness of the sacrificial cell 110 may be equal to or thicker than the thickness of the unit cell 210, which will be described later.

2 and 3, the sacrificial cell 110 may include an air electrode collector 11, an air electrode 12, an electrolyte 13, a fuel electrode 14, and a fuel electrode collector 15 The air electrode 12 may be composed of a cathode and the fuel electrode 14 may be composed of an anode.

The air electrode collector 11 is in contact with the interconnector 120 on the upper side of the sacrificial cell 110 and positioned on the outer surface of the air electrode 12 to collect electricity of the air electrode 12, (11) may be made of lanthanum strontium cobalt oxide (La _{1 - x} Sr _x CoO ₃ ) as a material that reacts with chromium (Chromium) and may have a thickness of 1 μm to 10 mm.

In addition to lanthanum strontium cobalt oxide (La _{1 - x} Sr _x CoO ₃ ) capable of adsorption reaction with chromium, lanthanum strontium manganese oxide (La _{1 - x} Sr _x MnO ₃ ) and lanthanum strontium iron oxide (La _{1 - x} Sr _x FeO ₃ ).

The lanthanum strontium cobalt oxide (La _{1 - x} Sr _x CoO ₃ ) contained in the cathode current collector 11 is a material that reacts with chromium and adsorbs the same to or in the same amount as other materials contained in the cathode current collector 11 So that the adsorption of chromium in the cathode current collector 11 of the sacrificial cell 110 can be most actively performed.

More specifically, when gas is supplied to the solid oxide fuel cell 1000, a metal connection pipe (not shown) including an interconnector 120 that is first brought into contact with the gas before the gas is supplied to the unit cell module 200 No), the reformer (not shown) and a heat exchanger (not shown) is as oxidizing volatile chromium (CrO ₂ (OH)) may have to be generated there, metal pipe, the reformer and the heat exchange including the interconnect 120 group metal And can be exposed to a high temperature region.

At this time, the volatile chromium generated by oxidation of the metal connector including the interconnector 120, the reformer and the heat exchanger is moved to the air electrode collector 11 adjacent to the interconnector 120, It can react with the contained lanthanum strontium cobalt oxide (La _{1- x} Sr _x CoO ₃ ).

Here, the lanthanum strontium cobalt oxide (La _{1 -x} Sr _x CoO ₃ ) contained in the air electrode current collector 11 reacts with the chromium generated in the metal connecting pipe including the interconnector 120, the reformer and the heat exchanger This can prevent the chromium poisoning phenomenon occurring between the cathode 12 and the electrolyte 13 while reducing the movement of the chromium and prevent the chromium poisoning phenomenon occurring in the solid oxide fuel cell 1000 Can be reduced.

That is, when the solid oxide fuel cell 1000 is driven at a high temperature of 600 to 800 ° C, volatile chromium may be generated as the metal connector including the interconnector 120, the reformer, and the heat exchanger are oxidized. The lanthanum strontium cobalt oxide (La _{1 - x} Sr _x CoO ₃ ) contained in the cathode current collector 11 before reacting with oxygen and water vapor and poisoning the active region at the interface between the cathode 12 and the electrolyte 13, And the like.

Therefore, chromium is adsorbed to the cathode current collector 11 by adsorbing chromium, thereby reducing chromium migration, reducing the amount of chromium present in the solid oxide fuel cell 1000, It is possible to prevent the chromium poisoning phenomenon and prevent deterioration of the performance of the solid oxide fuel cell 1000.

The content of the lanthanum strontium cobalt oxide (La _1-x Sr _x CoO ₃ ) contained in the cathode current collector 11 of the sacrificial cell 110 is included in the cathode current collector 21 of the unit cell 210 The thickness of the cathode current collector 11 of the sacrificial cell 110 may be greater than the content of the lanthanum strontium cobalt oxide (La _{1 - x} Sr _x CoO ₃ ) 21). &Lt; / RTI &gt;

For example, when the cathode current collector 11 of the sacrificial cell 110 contains lanthanum strontium cobalt oxide (La _{1 - x} Sr _x CoO ₃ ) in an amount of 35% and lanthanum strontium cobalt iron oxide (La _1-x in an amount of _{10% x Sr x CoO 3)} , - Sr x Co 1-y Fe y O 3) is lanthanum strontium cobalt oxide (La ₁ the cathode current collector 21 of the did not contain the unit cell 210 And lanthanum strontium cobalt iron oxide (La _1-x Sr _x Co _1-y Fe _y O ₃ ) in an amount of 27%.

That is, since the cathode current collector 11 of the sacrificial cell 1100 contains more lanthanum strontium cobalt oxide (La _{1 - x} Sr _x CoO ₃ ) that adsorbs the chromium, the cathode current collector 21, the reaction of adsorbing chromium in the cathode current collector 11 of the sacrificial cell 110 can be more actively performed.

Therefore, the chromium component existing in the solid oxide fuel cell 1000 decreases due to the reaction of the volatile chromium adsorption of the cathode current collector 11 of the sacrificial cell 110, and the chromium component existing in the cathode 22, The chromium poisoning phenomenon that may occur between the electrolytes 23 is effectively reduced, thereby preventing degradation of the performance of the solid oxide fuel cell 1000 and ensuring stability.

In addition, the ceramic coating complex process such to prevent Cr volatilization of the metal by a simple process to increase the content of lanthanum strontium cobalt oxide (La _1-x Sr _x CoO _3), the air electrode current collector 11 of the sacrificial cell 110 And the overall system price of the solid oxide fuel cell 1000 can be maintained as it is.

Next, the air electrode 12 is adjacent to the air electrode current collector 11 to reduce the gas supplied to the solid oxide fuel cell 1000 to oxygen ions. By continuously flowing air into the air electrode 12, Lt; / RTI &gt;

At this time, the air electrode 12 may be configured to include a Cathode Support Layer (CSL) and a Cathode Functional Layer (CFL). The CFL may be provided as a porous membrane and the CSL may be provided as a thick or thicker layer such as CFL, 12), and can be formed with excellent electric conductivity.

The air electrode 12 is made of lanthanum strontium cobalt iron oxide (La _{1 - x} Sr _x Co _{1 - y} Fe _y O ₃ ), barium strontium cobalt iron oxide (Ba _{1- x} Sr _x Co _{1 - y} Fe _y O ₃ ) (La _{1- x} Sr _x MnO ₃ ) and samarium strontium cobalt oxide (Sm _{1 - x} Sr _x CoO ₃ ), and it is preferable that the gas diffusion layer And the thickness of the air electrode 12 may be 10 nm to 100 탆.

Next, the electrolyte 13 is positioned between the air electrode 12 and the fuel electrode 14 and must be dense so that gas and fuel are not mixed with each other, and the oxygen ion conductivity and the electron conductivity should be low.

At this time, the electrolyte 13 may include at least one of zirconia-based, ceria-based and lanthanum gallate-based materials, and the thickness of the electrolyte 13 may be 10 nm to 100 μm.

Next, the fuel electrode 14 is positioned on one side of the electrolyte 13 to serve as electrochemical oxidation and charge transfer of the fuel, and the fuel electrode 14 includes an anode support layer (ASL) and an anode functional layer can do.

The AFL is provided in the form of a porous film, and the ASL is provided as a thick or thicker layer as the AFL, thereby serving as a supporting layer of the fuel electrode 14, and can be formed with excellent electrical conductivity.

The fuel electrode 14 may include a cermet mixed with zirconia-based, ceria-based and lanthanum gallate-based materials and nickel oxide, which are materials for forming the electrolyte 13, and Ni / YSZ- And at least one of the summits, or a pure metal such as Ni, Co, Ru, and Pt may be used as the material of the anode 14.

The fuel electrode 14 may further include activated carbon as necessary and may be configured in a porous form to provide a path through which the fuel gas is well diffused and oxygen ions can move, Lt; RTI ID = 0.0 &gt; 1000 &lt; / RTI &gt;

The fuel electrode collector 15 is in contact with the interconnector 120 on the lower side of the sacrificial cell 110 and is positioned on the outer side surface of the fuel electrode 14 to collect electricity of the fuel electrode 14, The thickness of the current collector 14 may be 10 nm to 100 mu m.

Next, in the sacrificial cell module 100, the interconnector 120 is positioned above and below the sacrificial cell 110 so that when one or more sacrificial cells 110 are driven, one or more sacrificial cells 110 are electrically connected to each other So that it can be communicated.

At this time, the interconnector 120 may be formed of a metal such as chromium, iron, carbon, copper, nickel, manganese, cobalt, titanium Ceramics, and glass, including at least one of lithium (Li), tungsten (W), rubidium (Rb), and niobium (Nb).

The upper and lower structures of the interconnector 120 may include at least one of a concavo-convex shape or a flat shape. In the case of the concavo-convex shape, the convex and concave shapes may be repeated.

In the case of the concave / convex type interconnector 120, the projecting portion contacts one surface of the sacrificial cell 110, so that one or more sacrificial cells 110 can be electrically connected to each other.

Also, in the case of the flat connector 120, one side of the interconnector 120 is in contact with one side of the sacrificial cell 110, so that one or more sacrificial cells 110 are electrically connected to each other You can give.

The interconnect 120 may be formed larger than the size of the sacrificial cell 110 and may be formed to be identical to the shape of the sacrificial cell 110.

For example, the interconnect 120 may be provided in the form of a square composed of a metal material of ferritic stainless steel containing at least 13% chromium and the sacrificial cell 110 may be provided in the form of a square similar to the interconnect 120 And the size thereof may be smaller than the size of the inter connecter 120.

Next, the unit cell module 200 may be configured in one or more solid oxide fuel cells 1000, and may be configured more than the number of the sacrificial cell modules 100.

The unit cell 210 and the interconnector 220 of the unit cell module 200 may be provided in the same shape and size as the sacrificial cell 110 and the interconnector 120 of the sacrificial cell module 100, The material of the interconnector 220 of the unit cell module 200 may be the same as the material of the interconnector 120 of the sacrificial cell module 100 described above.

For example, if the interconnector 120 of the sacrificial cell module 100 is formed of ferrite stainless steel containing 13% chromium, the interconnector 220 of the unit cell module 200 may also be formed of the same material So that the thicknesses of the two interconnectors 120 and 220 can be provided equal to each other.

Here, the content of the lanthanum strontium cobalt oxide (La _{1 - x} Sr _x CoO ₃ ) contained in the sacrificial cell 110 is greater than the content of the lanthanum strontium cobalt oxide (La _{1 - x} Sr _x CoO ₃ ) contained in the unit cell 210 The thickness of the sacrificial cell 110 is thicker than that of the unit cell 210 because the sacrificial cell 110 has a thickness of 150 m and the unit cell 210 has a thickness of 100 m, 0.0 &gt; 200 &lt; / RTI &gt;

4, the unit cell 210 of the unit cell module 200 includes an air electrode collector 21, an air electrode 22, an electrolyte 23, a fuel electrode 24, and a fuel electrode collector 25 The configuration of the air electrode 22, the electrolyte 23, the fuel electrode 24 and the fuel electrode current collector 25 is similar to the configuration of the sacrificial cell 110 described above, and only different configurations will be described .

The cathode current collector 21 of the unit cell 210 may include lanthanum strontium cobalt iron oxide (La _{1- x} Sr _x Co _{1 -y} Fe _y O ₃ ), and lanthanum strontium manganese oxide (La _{1 -x} Sr _x MnO ₃ ), lanthanum strontium iron oxide (La _{1 - x} Sr _x FeO ₃ ), and samarium strontium cobalt oxide (Sm _{1 - x} Sr _x CoO ₃ ).

The first gas supply unit 300 and the second gas supply unit 400 can supply gas into the solid oxide fuel cell 1000. At this time, the oxygen gas O ₂ is supplied to the first gas supply unit 300 And the hydrogen gas H ₂ may be supplied to the second gas supply unit 400.

The first gas supply unit 300 is disposed in the upper interconnect 120 of the sacrificial cell module 100 and the upper interconnect 220 of the unit cell module 200 to supply the sacrificial cell module 100 with the first oxygen Oxygen gas can be supplied to the air electrode collector 11 and the air electrode 12 of the sacrificial cell 110 and then oxygen gas is supplied to the unit cell module 200 so that the air electrode Oxygen gas can be supplied to the current collector 21 and the air electrode 22.

The first gas supply unit 300 can supply oxygen gas to the cathodes of the sacrificial cell module 100 and the unit cell module 200 and thus can supply oxygen gas to the cathode electrode 12 and the unit cell 210 of the sacrificial cell 110. [ The air electrode 22 can reduce the supplied oxygen gas to oxygen ions.

The oxygen gas supplied from the first gas supply unit 300 is brought into contact with the interconnector 120 of the sacrificial cell module 100 and the interconnector 120 is oxidized to generate volatile chromium, The lanthanum strontium cobalt oxide (La _1-x Sr _x CoO ₃ ) in the current collector 11 reacts with the volatile chromium component generated in the interconnector 120, And the chromium poisoning phenomenon that may occur between the cathode 22 and the electrolyte 23, which are the cathodes of the unit cell 210, can be effectively reduced.

The first gas supply unit 300 may be formed in a solid form such as chromium, iron, carbon, copper, nickel, manganese, cobalt, titanium Ceramic, and glass including at least one of lithium (Li), tungsten (W), rubidium (Rb), and niobium (Nb).

The second gas supply unit 400 is disposed in the lower interconnector 120 of the sacrificial cell module 100 and the lower interconnector 220 of the unit cell module 200 to connect the anode current collector Hydrogen gas can be supplied to the fuel electrode collector 15 and the fuel electrode 14 and the hydrogen gas can be supplied to the fuel electrode collector 25 and the fuel electrode 24 of the unit cell 210 at the same time.

The second gas supply unit 400 may supply hydrogen gas to the anode of the sacrificial cell module 100 and the unit cell module 200 and may supply hydrogen gas to the anode electrode 14 of the sacrificial cell 110 and the anode electrode of the unit cell 210. [ The hydrogen gas supplied to the solid oxide fuel cell 24 may serve as a fuel in the solid oxide fuel cell 1000.

More specifically, if the hydrogen gas supplied from the second gas supply unit 400 is supplied to the fuel electrodes 14 and 24 as fuel, the hydrogen gas, which is fuel, is oxidized and electrons are emitted.

At this time, the oxygen gas supplied from the first gas supply unit 300 to the air electrodes 12 and 22 is oxidized by the hydrogen gas, which is the fuel, and the emitted electrons are reduced to oxygen ions. The reduced oxygen ions are supplied to the electrolytes 13 and 33 To the fuel electrodes 14 and 24 and react with the oxidized fuel H ⁺ to generate water.

Next, the electric loader 500 separately drives the sacrificial cell module 100 of the solid oxide fuel cell 1000, and does not affect the operation of the unit cell module 200.

That is, even if the unit cell module 200 is not driven, the electric loader 500 separately drives the sacrificial cell module 100 to always adsorb the chromium generated in the interconnectors 120 and 220, It is possible to effectively prevent the chromium poisoning phenomenon occurring at the interfaces of the air electrodes (12, 22) and the electrolytes (13, 23).

Next, the solid oxide fuel cell 1000 includes the sacrificial cell module 100 and the sacrificial cell 110, the unit cell 210, and the interconnectors 120 and 220 in the unit cell module 200, A sealing member (not shown) can be provided.

The sealing material may be constructed using one or more materials of rubber, silicone, polymeric material, metal, ceramic, and glass, wherein the sealing material is disposed between the sacrificial cell module 100 and the interconnectors 120, 220 within the unit cell module 200. [ As shown in Fig.

<Examples>

The sacrificial cell contained a larger amount of lanthanum strontium cobalt oxide (La _{1- x} Sr _x CoO ₃ ) than the unit cell.

<Experimental Example>

Lanthanum strontium cobalt oxide ( La _{One - x} Sr _x CoO ₃ ) Depending on the content of Sacrificial cell  And Unit cell  Comparison of chromium content

In the atmosphere containing 10 -4 Pa, the air containing chromium component passed through the sacrifice cell where the content of lanthanum strontium cobalt oxide (La _1-x Sr _x CoO ₃ ) was larger than that of the unit cell, and air passing through the sacrificial cell was lanthanum strontium cobalt The content of oxide (La _{1 - x} Sr _x CoO ₃ ) was supplied to the unit cell which is smaller than the sacrificial cell.

At this time, the unit cell supplied with the air passing through the sacrifice cell was measured for 100 hours, and the chromium component was ionized by the inductively coupled plasma using the Chromium Getter LSC portion of the sacrificial cell and the unit cell and the air electrode portion as the cathode. Then, information derived from ionized chromium ions was introduced into a mass spectrometer and an emission spectrometer, and qualitative and quantitative analysis were carried out.

As a result, the Chromium Getter LSC part of the sacrificial cell where the content of lanthanum strontium cobalt oxide (La _{1 - x} Sr _x CoO ₃ ) was larger than that of the unit cell and the chromium component content of the cathode were measured to be 4 to 11 ppm, and the lanthanum strontium cobalt oxide _{1 - x} Sr _x CoO ₃ ) was less than that of the sacrificial cell, the Chromium Getter LSC part of the unit cell and the chromium component content of the cathode were measured to be 0.4 ppm.

This is because the chromium content of the lanthanum strontium cobalt oxide (La _{1 - x} Sr _x CoO ₃ ) is firstly adsorbed in the sacrificial cell, so that the chromium content in the unit cell is lower. On the other hand, the lanthanum strontium cobalt In the sacrificial cells where the content of oxide (La _{1 - x} Sr _x CoO ₃ ) was larger than that of the unit cell, the larger chromium content was measured.

The results show that when a solid oxide fuel cell is composed of a sacrificial cell containing lanthanum strontium cobalt oxide (La _{1 - x} Sr _x CoO ₃ ) more than a unit cell, by adsorbing most chromium components in the sacrificial cell, It can be seen that the chromium component content in the fuel cell is reduced and the chromium poisoning phenomenon is prevented.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

1000: Solid oxide fuel cell
100: sacrificial cell module
110: sacrificial cell
120, 220: Interconnect connector
11: cathode collector
12, 22: cathode
13, 23: electrolyte
14, 24: anode
15, 25: anode collector
120, 220: Interconnect connector
200: Unit cell module
210: unit cell
21: cathode collector
300: first gas supply part
400: second gas supply part
500: Electric loader

Claims (7)

A unit cell including a unit cell and an interconnect disposed on both sides of the unit cell; And
A sacrificial cell module including a sacrificial cell and interconnects disposed on both sides of the sacrificial cell,
The sacrificial cell may include:
Characterized in that it comprises a substance which adsorbs and reacts with chromium to reduce the movement of chromium.
Solid oxide fuel cell.
The method according to claim 1,
The material,
Characterized in that it comprises lanthanum strontium cobalt oxide (La _{1 - x} Sr _x CoO ₃ )
Solid oxide fuel cell.
The method according to claim 1,
The sacrificial cell may include:
Characterized in that the content of lanthanum strontium cobalt oxide (La _{1 - x} Sr _x CoO ₃ ) is higher than that of the unit cell.
Solid oxide fuel cell.
The method according to claim 1,
The sacrificial cell module includes:
And a second end of the unit cell module is located at a front end of the unit cell module.
Solid oxide fuel cell.
The method according to claim 1,
In the solid oxide fuel cell,
Wherein the solid oxide fuel cell is provided as one of a planar type solid oxide fuel cell, a tube type solid oxide fuel cell, and a flat-tube type fuel cell.
Solid oxide fuel cell.
The method according to claim 1,
Wherein the unit cell module and the sacrificial cell module comprise:
Wherein a separation distance is formed between the unit cell module and the sacrificial cell module, or an insulator is disposed and electrically separated.
Solid oxide fuel cell.
The method according to claim 1,
Solid oxide fuel cells,
And an electric loader for separately driving the sacrificial cell module.
Solid oxide fuel cell.

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