JP2009283239A - Fuel cell, and fuel cell battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel cell of a constitution in which an internal gas current turns back, and the fuel battery cell can suppress local temperature rise, and carry out a power generation reaction uniformly. <P>SOLUTION: This fuel cell FC1 is equipped with an air electrode support body 20, a fuel electrode 50, an electrolyte part 40, and an interconnector part 60. A flow passage 70 into which air flows is formed inside the air electrode support body 20, and the flow passage 70 includes an forward passage 71 into which air flows, and a backward passage 72 wherein the air flowed into the forward passage 71 turns back and flows out. A partition part 30 is equipped which exists extended along the flow passage 70, and is lower in gas permeability than the air electrode support body 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  Aspects of the invention generally relate to fuel cells and fuel cells.

Conventionally, various types of fuel cells have been proposed in order to arrange an air electrode and a fuel electrode with an electrolyte interposed therebetween. One embodiment is a fuel battery cell formed as a bottomed cylinder as shown in FIG. In this fuel cell, an electrolyte layer is formed outside the air electrode support, a fuel electrode layer is formed on the electrolyte layer, and an interconnector is formed so as to be connected to the air electrode support. An air introduction tube is inserted into the bottomed cylindrical air electrode support, and air is introduced through the air introduction tube. Another aspect is a fuel battery cell formed so that an air flow path or a fuel gas flow path is folded back as disclosed in Patent Document 2 below. In the case of this fuel cell, air or fuel gas is introduced from one end of the flow path and is flowed out from the other end of the flow path.
JP 2006-66387 A Japanese Patent No. 3137177

  By the way, the thing of the aspect which folds up the flow path inside a fuel cell as described in the said patent document 2 WHEREIN: The temperature rises locally in the turned-up part, and the phenomenon where electric power generation is not stabilized appears. In the above-mentioned patent document 2, as a countermeasure for that, the gas flowing in the forward path is configured to diffuse in the backward path (see paragraph numbers 0026 to 0028 of FIG. 16 and FIG. 16). However, even if a fuel cell having such a configuration is actually used, a local temperature rise may actually occur, and the configuration in which the gas flowing in the outward path diffuses in the return path does not necessarily increase the local temperature. The present inventors have found that the power generation reaction is not uniformly performed without being suppressed.

  Therefore, in the present invention, a fuel battery cell having a configuration in which an internal gas flow is folded back, which is configured by a fuel battery cell capable of suppressing a local temperature rise and performing a power generation reaction uniformly, and the fuel battery cell. An object of the present invention is to provide a fuel cell.

  In order to solve the above-described problem, a fuel cell according to the present invention is a fuel cell operated by a first gas including one of a fuel gas and an oxidant gas and a second gas including the other, wherein the first A first electrode corresponding to one gas; a second electrode corresponding to the second gas; an electrolyte portion disposed between the first electrode and the second electrode; and the first electrode electrically A connected interconnector part; and a support for supporting the first electrode, the second electrode, the electrolyte part, and the interconnector part, and sandwiching the electrolyte part and the electrolyte part. A first reaction part comprising the first electrode and the second electrode is formed on a part of an outer surface of the support, and the interconnector part is an outer surface of the support and the first reaction Formed in the remainder where the part is not formed, The support is formed of a conductive material, and a flow path through which the first gas flows is formed inside the support, and the flow path includes an outward path through which the first gas flows. A return path in which the first gas flowing into the forward path is folded back and flows out, and the forward path and the return path are formed by being partitioned by a partition portion, and the gas permeability of the partition portion is It is characterized by being lower than the gas permeability.

  According to the present invention, a fuel battery cell having a configuration in which an internal gas flow is folded back, which is configured by a fuel battery cell capable of suppressing a local temperature increase and performing a power generation reaction uniformly, and the fuel battery cell. A fuel cell can be provided.

  Prior to describing the best mode for carrying out the present invention, the function and effect of the present invention will be described.

  A fuel battery cell according to the present invention is a fuel battery cell that operates with a first gas containing one of a fuel gas and an oxidant gas and a second gas containing the other, and a first electrode corresponding to the first gas. A second electrode corresponding to the second gas, an electrolyte part disposed between the first electrode and the second electrode, an interconnector part electrically connected to the first electrode, A support for supporting the first electrode, the second electrode, the electrolyte part, and the interconnector part, and the first electrode formed between the electrolyte part and the electrolyte part; and A first reaction part comprising a second electrode is formed on a part of the outer surface of the support, and the interconnector part is on the outer surface of the support and the first reaction part is not formed. Formed and the support has electrical conductivity And a flow path through which the first gas flows is formed inside the support. The flow path includes a forward path through which the first gas flows and a first path through which the first gas flows. Including a return path through which one gas folds and flows out, and the forward path and the return path are formed by partitioning by a partition part, and the gas permeability of the partition part is lower than the gas permeability of the support It is characterized by.

  As in the fuel battery cell of the present invention, a forward path for the first gas to flow into the support body, and a return path for the first gas that has flowed into the support body through the forward path to flow out of the support body, If the entire support including the partition between the forward path and the return path is formed of the same material, the support needs to transmit the first gas passing through the interior to the first electrode. The partition is also formed so as to be about 20% to 40%. When the partition between the forward path and the return path is formed with such an open porosity, the first gas that has flowed into the forward path actually permeates to the return path side before reaching the return part to the return path. . When such a permeation phenomenon occurs, the supply of the first gas from the outward path to the return path is insufficient, and the heat conduction by the first gas cannot be performed sufficiently. As a result, power generation is performed in the axial direction of the fuel cell. The present inventors have found that the performance varies and the performance as a fuel cell cannot be sufficiently exhibited. Therefore, in the present invention, the forward path and the return path are formed by partitioning with a partition part, and the gas permeability of the partition part is made lower than the gas permeability of the support, so that unnecessary gas permeation from the forward path to the return path is achieved. Is suppressed. As a result, at the turn-back portion from the forward path to the return path, oxygen exhaustion or fuel withering occurs due to a decrease in the oxygen concentration or hydrogen concentration in the first gas, and the power generation reaction in the axial direction of the fuel cell is not uniform. Damage can be suppressed. Moreover, the nonuniformity of the temperature distribution in the axial direction of the fuel cell due to a decrease in the heat transfer amount by the first gas can be suppressed. Thereby, the power generation performance in the axial direction of the fuel cell can be made uniform. Accordingly, the flow of the first gas and the second gas inside and outside the fuel cell can be stably maintained, and even when a fuel cell module or a fuel cell is configured by incorporating a plurality of these fuel cells, it is practical and safe. In addition, highly efficient power generation performance can be obtained.

  A fuel battery cell according to the present invention is a fuel battery cell that operates with a first gas containing one of a fuel gas and an oxidant gas and a second gas containing the other, and a first electrode corresponding to the first gas. An electrode support formed of a material; a second electrode corresponding to the second gas; an electrolyte portion disposed between the electrode support and the second electrode; and the electrode support electrically An interconnector portion connected thereto, wherein the electrolyte portion is formed on a part of the outer surface of the electrode support, and the second electrode portion is formed on the formed electrolyte portion so that the second electrode portion is formed. 2 reaction parts are formed, the interconnector part is formed on the outer surface of the electrode support and the remaining part where the electrolyte part is not formed, and the electrode support includes the second electrode, Electrolyte part and interconnector And a flow path through which the first gas flows is formed inside the electrode support. The flow path includes a forward path through which the first gas flows and a first path through which the first gas flows. A return path through which gas flows back and flows out, and the forward path and the return path are formed by partitioning by a partition part, and the gas permeability of the partition part is lower than the gas permeability of the support Features.

  As in the fuel battery cell of the present invention, the forward path for the first gas to flow into the electrode support body, and the first gas that has flowed into the electrode support body through the forward path is folded back and flows out of the electrode support body. When the entire electrode support including the partition between the forward path and the return path is formed of the same material, the support needs to transmit the first gas passing through the interior to the electrolyte part. Partitions are also formed so that the open porosity is about 20% to 40%. When the partition between the forward path and the return path is formed with such an open porosity, the first gas that has flowed into the forward path actually permeates to the return path side before reaching the return part to the return path. . When such a permeation phenomenon occurs, the supply of the first gas from the outward path to the return path is insufficient, and the heat conduction by the first gas cannot be performed sufficiently. As a result, power generation is performed in the axial direction of the fuel cell. The present inventors have found that the performance varies and the performance as a fuel cell cannot be sufficiently exhibited. Therefore, in the present invention, the forward path and the return path are formed by partitioning with a partition part, and the gas permeability of the partition part is made lower than the gas permeability of the support, so that unnecessary gas permeation from the forward path to the return path is achieved. Is suppressed. As a result, at the turn-back portion from the forward path to the return path, oxygen exhaustion or fuel withering occurs due to a decrease in the oxygen concentration or hydrogen concentration in the first gas, and the power generation reaction in the axial direction of the fuel cell is not uniform. Damage can be suppressed. Moreover, the nonuniformity of the temperature distribution in the axial direction of the fuel cell due to a decrease in the heat transfer amount by the first gas can be suppressed. Thereby, the power generation performance in the axial direction of the fuel cell can be made uniform. Accordingly, the flow of the first gas and the second gas inside and outside the fuel cell can be stably maintained, and even when a fuel cell module or a fuel cell is configured by incorporating a plurality of these fuel cells, it is practical and safe. In addition, highly efficient power generation performance can be obtained.

  In the fuel cell according to the present invention, it is also preferable that at least a part of the partition portion is formed of a dense body. By forming at least a part of the partition portion with a dense body, the gas permeability can be more reliably lowered.

  In the fuel cell according to the present invention, it is also preferable that the partition portion is formed of a dense body on a surface in contact with the forward path or the return path. By forming the surface in contact with the forward path or the backward path with a dense body, the permeation of the first gas can be more reliably suppressed. In addition, since it is possible to form a part other than the surface of the partition part other than the dense body, for example, by combining the thermal expansion coefficient with the support or the electrode support, generation of unnecessary stress due to heat generation Can be reduced.

  Moreover, in a fuel cell provided with the fuel cell according to the present invention, a fuel cell having the above-described effects can be provided.

  Next, preferred embodiments of the present invention will be described with reference to the drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and a duplicate description is omitted.

  The fuel cell FC1 according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view for explaining the outer shape of the fuel cell FC1. FIG. 2 is a cross-sectional view of the fuel cell FC1 in the xz plane including the AA line of FIG. FIG. 3 is a cross-sectional view of the fuel cell FC1 in the yz plane including the line BB in FIG. FIG. 4 is a cross-sectional view of the fuel cell FC1 in the yz plane including the CC line of FIG. FIG. 5 is a cross-sectional view of the fuel cell FC1 in the xy plane including the DD line (EE line) in FIG. FIG. 6 is a cross-sectional view of the fuel cell FC1 in the xy plane including the line FF in FIG.

  In FIG. 1, the axial direction of the fuel cell FC1 (the direction in which the fuel cell FC1 extends) is defined as the y direction, and the width direction of the fuel cell FC1 perpendicular to the y direction (a flow path 70 described later is connected). Direction) is the x direction, the direction is perpendicular to both the y direction and the x direction, and the thickness direction of the fuel cell FC1 is the z direction.

  As shown in FIG. 1, the fuel cell FC1 is formed in a rectangular parallelepiped shape. The fuel cell FC1 is a surface including the xy plane and is illustrated as a top surface in FIG. 1, a second surface 102 that is a back surface with respect to the first surface 101, a first surface 101, A side surface connecting the second surface 102 and including the yz plane, a third surface 103 and a fourth surface 104, and an end surface connecting the first surface 101 and the second surface 102 and including the xz plane The fifth surface 105 and the sixth surface 106 are formed in a rectangular parallelepiped shape. The fifth surface 105 is formed as an open end which is an end surface where the flow path 70 is opened, and the sixth surface 106 is formed as a sealed end which is an end surface where the flow path 70 is sealed.

  The fuel cell FC1 includes an air electrode support 20 (corresponding to the electrode support in the present invention), a partition part 30, an electrolyte part 40, and a fuel electrode 50 (corresponding to the second electrode in the present invention), An interconnector portion 60 and a flow path 70 are provided.

The air electrode support 20 is a support for supporting the partition part 30, the electrolyte part 40, the fuel electrode 50, and the interconnector part 60, and a flow path 70 is formed therein. The air electrode support 20 is formed of an air electrode material made of a perovskite oxide. As such an air electrode material, for example, LaCoO ₃ , LaMnO ₃ , LaFeO _3, etc., which is doped with Sr, Ca or the like at the La site, or not doped, or a composite material thereof is used. The open porosity of the air electrode support 20 is 20% to 40%. The open porosity indicates the content of pores connected to the outside air, and is calculated by the Archimedes method.

  A flow path 70 is formed in the air electrode support 20 along the y direction that is the axial direction of the fuel cell FC1 (the direction in which the fuel cell FC1 extends). In the case of this embodiment, four flow paths 70 are formed in a row in the x direction orthogonal to the y direction. Each flow path 70 includes a forward path 71 through which air (oxidant gas) as the first gas flows and a return path 72 through which the flowed-in air flows out. The forward path 71 and the return path 72 are formed so as to penetrate the inside of the air electrode support 20 from the fifth surface 105 as the opening end toward the sixth surface 106 as the sealing end. The forward path 71 and the return path 72 are separated and formed by being partitioned by the partition portion 30.

  As described above, the flow path 70 including the forward path 71 and the return path 72 is formed by forming a cavity along the y direction that is the axial direction in the air electrode support 20 and disposing the partition portion 30 in the cavity. Has been. In forming the cavity along the y direction in the air electrode support 20, the air electrode support 20 may be integrally formed by press molding or the like. A groove may be formed.

  As described above, the partition portion 30 is formed from the fifth surface 105 as the opening end toward the sixth surface 106 as the sealing end. As shown in FIG. 2, in the middle of the fuel cell FC <b> 1, the same cross-sectional form as that appearing on the fifth surface 105 is formed. Further, as shown in FIG. 3, the partition portion 30 forms a connection portion 73 as a predetermined space so that the forward path 71 and the return path 72 are connected in the vicinity of the sixth surface 106 that is a sealing end. Is arranged. Moreover, as shown in FIG. 6, the partition part 30 is arrange | positioned from the 5th surface 105 to the connection part 73 as a plate-shaped body. As shown in FIGS. 4 and 5, in the present embodiment, the connection portions 73 provided in the four flow paths 70 are formed so as to communicate with each other. Therefore, when viewed for each flow path 70, the cross-sectional area perpendicular to the gas flow direction is widened at the connection portion 73, and the flow velocity of the air as the oxidant gas is reduced in this portion. .

The partition portion 30 is an air electrode material made of a perovskite oxide (for example, LaCoO ₃ , LaMnO ₃ , LaFeO _3, etc., which is doped with Sr, Ca, etc. at the La site, or is not doped, or a composite thereof. Material), an alloy containing at least one kind of silver, gold, tungsten, rhodium, iridium, or a composite thereof, and the like, and has a thermal expansion coefficient lower than that of the air electrode support. It is formed as a plate-like body that is substantially the same as the air electrode support 20. Here, “substantially identical” means that the thermal expansion coefficient of the air electrode support 20 is about 10.5 × 10 ⁻⁶ (cm / cm · K ⁻¹ ), whereas the thermal expansion coefficient of the partition portion 30 is about 8. 5 to 12.5 × 10 ⁻⁶ (cm / cm · K ⁻¹ ). The partition part 30 has a dense body formed in layers on the surface thereof. The dense body formed in a layer shape may be formed only on the surface facing the forward path 71 of the partition portion 30, or may be formed only on the surface facing the return path 72. In addition, the whole partition part 30 may be comprised as a dense body. The open porosity of the partition part 30 is preferably 0 to less than 20%, more preferably 0 to 10%. Thus, when the open porosity of the partition part 30 is formed to be lower than the open porosity of the air electrode support 20, the gas permeability can be surely made lower than that of the air electrode support 20. But the aspect which makes the gas permeability of the partition part 30 lower than the air electrode support body 20 is not limited only to the thing by control of an open porosity.

  The electrolyte part 40 is formed in layers so as to cover the second surface 102, the third surface 103, the fourth surface 104, and the sixth surface 106 of the air electrode support 20. The first surface 101 of the air electrode support 20 is formed in layers so as to cover a portion where the interconnector portion 60 is not formed. The electrolyte part 40 includes, for example, zirconia doped with at least one selected from rare earth elements such as Y and Sc, ceria doped with at least one selected from rare earth elements, lanthanum gallate doped with at least one selected from Sr and Mg, Formed from at least one of the following.

  The fuel electrode 50 is formed in layers so as to be connected to the second surface 102, the third surface 103, and the fourth surface 104 of the air electrode support 20. The fuel electrode 50 is made of porous nickel and YSZ cermet.

The interconnector portion 60 is formed in a layer shape so as to cover a part of the first surface 101 of the air electrode support 20. The interconnector portion 60 is formed of LaCrO ₃ doped with Sr, Ca or the like.

In addition, in this 1st embodiment, although comprised as the air electrode support body 20, you may comprise as a fuel electrode support body. In that case, the fuel electrode 50 is configured as an air electrode. When the air electrode support 20 is configured as a fuel electrode support, the air electrode support 20 is formed of porous nickel and YSZ cermet. In that case, in order to configure the fuel electrode 50 as an air electrode, for example, LaCoO ₃ , LaMnO ₃ , LaFeO _3, etc., which is doped with Sr, Ca, etc. at the La site, or not doped, or a composite material thereof Etc. are used.

  In the first embodiment, air (fuel gas when the air electrode support 20 is used as a fuel electrode support) is introduced from the fuel electrode 50 side that is formed as a reaction part, and the interconnector 60 Although it is derived from the side, it is also preferable to configure in reverse. Specifically, air (in the case of using the air electrode support 20 as the fuel electrode support, fuel gas) is introduced from the interconnector 60 side and led out from the fuel electrode 50 side.

  Next, the fuel cell FC2 according to the second embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a perspective view for explaining the outer shape of the fuel battery cell FC2. FIG. 8 is a cross-sectional view of the fuel cell FC2 in the xz plane including the line A2-A2 of FIG. FIG. 9 is a cross-sectional view of the fuel cell FC2 in the yz plane including the line B2-B2 of FIG. FIG. 10 is a cross-sectional view of the fuel cell FC2 in the yz plane including the C2-C2 line of FIG. FIG. 11 is a cross-sectional view of the fuel cell FC2 in the xy plane including the D2-D2 line (E2-E2 line) of FIG. FIG. 12 is a cross-sectional view of the fuel cell FC2 in the xy plane including the F2-F2 line of FIG.

  In FIG. 7, the axial direction of the fuel cell FC2 (the direction in which the fuel cell FC2 extends) is defined as the y direction, and the width direction of the fuel cell FC2 perpendicular to the y direction (a flow path 702 described later is connected). Direction) is the x direction, the direction is perpendicular to both the y direction and the x direction, and the thickness direction of the fuel cell FC2 is the z direction.

  As shown in FIG. 7, the fuel cell FC2 is formed in a rectangular parallelepiped shape. The fuel cell FC2 is a surface including the xy plane and is illustrated as a top surface in FIG. 7 as a top surface, a second surface 122 that is a back surface with respect to the first surface 121, a first surface 121, The third surface 123 and the fourth surface 124 that are side surfaces that connect the second surface 122 and include the yz plane, and the end surfaces that connect the first surface 121 and the second surface 122 and include the xz plane The fifth surface 125 and the sixth surface 126 are formed in a rectangular parallelepiped shape. The fifth surface 125 is formed as an open end which is an end surface where the flow path 702 is opened, and the sixth surface 126 is formed as a sealed end which is an end surface where the flow path 702 is sealed.

  The fuel cell FC2 includes a support 202 (corresponding to the support in the present invention), a partition 302, an air electrode 902 (corresponding to the first electrode in the present invention), an electrolyte part 402, and a fuel electrode 502. (Corresponding to the second electrode in the present invention), an interconnector portion 602, and a flow path 702.

The support body 202 is a support body for supporting the partition part 302, the air electrode 902, the electrolyte part 402, the fuel electrode 502, and the interconnector part 602, and a flow path 702 is formed therein. The support 202 is made of a conductive material, and is made of, for example, LaCrO ₃ used when forming an interconnector, doped with Sr, Ca, or the like. The open porosity of the support 202 is comprised between 20% and 40%. The open porosity indicates the content of pores connected to the outside air, and is calculated by the Archimedes method.

  A flow path 702 is formed in the support 202 along the y direction that is the axial direction of the fuel cell FC2 (the direction in which the fuel cell FC2 extends). In the case of this embodiment, four channels 702 are formed in the x direction orthogonal to the y direction. Each flow path 702 includes a forward path 712 through which air (oxidant gas) as the first gas flows, and a return path 722 through which the flowed-in air flows out. The forward path 712 and the return path 722 are formed so as to penetrate the inside of the support body 202 from the fifth surface 125 as an opening end toward the sixth surface 126 as a sealing end. The forward path 712 and the return path 722 are separated and formed by being partitioned by the partition portion 302.

  As described above, the flow path 702 including the forward path 712 and the return path 722 is formed by forming a cavity along the y direction that is the axial direction in the support 202 and disposing the partition portion 302 in the cavity. Yes. In forming the cavity in the y direction in the support 202, it may be formed integrally by press molding or the like, and the support 202 is divided into two to form a semicircular cavity groove in each. May be.

  As described above, the partition portion 302 is formed from the fifth surface 125 as the opening end toward the sixth surface 126 as the sealing end. As shown in FIG. 8, in the middle of the fuel cell FC1, a cross-sectional shape similar to that appearing on the fifth surface 125 is formed. Further, as shown in FIG. 9, the partition portion 302 forms a connection portion 732 as a predetermined space so that the forward path 712 and the return path 722 are connected in the vicinity of the sixth surface 126 that is a sealing end. Is arranged. Further, as shown in FIG. 15, the partition portion 302 is arranged as a plate-like body from the fifth surface 125 to the connection portion 732.

  As shown in FIGS. 10 and 11, in the case of this embodiment, the connection portions 732 provided in the four flow paths 702 are formed so as to communicate with each other. Therefore, when viewed for each flow path 702, the cross-sectional area perpendicular to the gas flow direction is widened at the connection portion 732, and the flow rate of the air as the oxidant gas is reduced in this portion. .

The partition portion 302 is an electrode material corresponding to the first gas supplied to the inside of the support 202 (an air electrode material made of a perovskite oxide, such as LaCoO ₃ , LaMnO ₃ , LaFeO _3, etc., and includes Sr and Ca Etc., doped with La site, non-doped material, or composite materials thereof, or fuel electrode material made of cermet of nickel and YSZ), interconnector material in which LaCrO ₃ is doped with Sr, Ca, etc., silver, A plate made of an alloy containing at least one kind of gold, tungsten, rhodium, iridium, or a composite material thereof having a transmittance lower than that of the support and having a thermal expansion coefficient substantially the same as that of the support 202 It is formed as a body. Here, “substantially the same” means that the thermal expansion coefficient of the support section 202 is about 10.5 × 10 ⁻⁶ (cm / cm · K ⁻¹ ), whereas the thermal expansion coefficient of the partition section 302 is about 8.5. 12.5 × 10 ⁻⁶ (cm / cm · K ⁻¹ ) indicates a certain level. The partition portion 302 has a dense body formed in layers on the surface thereof. The dense body formed in a layer shape may be formed only on the surface facing the forward path 712 of the partition portion 302, or may be formed only on the surface facing the return path 722. In addition, the whole partition part 302 may be comprised as a dense body. The open porosity of the partition part 302 is preferably 0 to less than 20%, more preferably 0 to 10%. Thus, when the open porosity of the partition part 302 is formed to be lower than the open porosity of the support 202, the gas permeability can be surely made lower than that of the support 202. But the aspect which makes the gas permeability of the partition part 302 lower than the support body 202 is not limited only to the thing by control of an open porosity.

The air electrode 902 is formed in layers so as to be connected to the second surface 122, the third surface 123, and the fourth surface 124 of the support 202. The air electrode 902 is formed of an air electrode material made of a perovskite oxide. As such an air electrode material, for example, LaCoO ₃ , LaMnO ₃ , LaFeO _3, etc., which is doped with Sr, Ca or the like at the La site, or not doped, or a composite material thereof is used.

  The electrolyte part 402 is formed in layers so as to cover the second surface 122, the third surface 123, the fourth surface 124, and the sixth surface 126 of the support 202. The first surface 121 of the support 202 is formed in layers so as to cover a portion where the interconnector portion 602 is not formed. The electrolyte part 402 includes, for example, zirconia doped with at least one selected from rare earth elements such as Y and Sc, ceria doped with at least one selected from rare earth elements, lanthanum gallate doped with at least one selected from Sr and Mg, Formed from at least one of the following.

  The fuel electrode 502 is formed in a layered manner so as to be connected to the second surface 122, the third surface 123, and the fourth surface 124 of the support 202. The fuel electrode 502 is formed of porous nickel and YSZ cermet.

The interconnector portion 602 is formed in a layer shape so as to cover a part of the first surface 121 of the support 202. The interconnector portion 602 is formed of LaCrO ₃ doped with Sr, Ca, or the like.

  In the second embodiment, air (or fuel gas) is introduced from the interconnector portion 602 side and led out from the air electrode 902 and fuel electrode 502 sides formed as reaction portions. It is also preferable that the configuration is reversed. Specifically, air (or fuel gas) is introduced from the air electrode 902 and the fuel electrode 502 side formed as a reaction part and led out from the interconnector part 602 side.

It is a perspective view which shows the fuel battery cell which concerns on 1st embodiment. It is sectional drawing which shows the fuel battery cell which concerns on 1st embodiment. It is sectional drawing which shows the fuel battery cell which concerns on 1st embodiment. It is sectional drawing which shows the fuel battery cell which concerns on 1st embodiment. It is sectional drawing which shows the fuel battery cell which concerns on 1st embodiment. It is sectional drawing which shows the fuel battery cell which concerns on 1st embodiment. It is a perspective view which shows the fuel battery cell which concerns on 2nd embodiment. It is sectional drawing which shows the fuel battery cell which concerns on 2nd embodiment. It is sectional drawing which shows the fuel battery cell which concerns on 2nd embodiment. It is sectional drawing which shows the fuel battery cell which concerns on 2nd embodiment. It is sectional drawing which shows the fuel battery cell which concerns on 2nd embodiment. It is sectional drawing which shows the fuel battery cell which concerns on 2nd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 ... Air electrode support body 30 ... Partition part 40 ... Electrolyte part 50 ... Fuel electrode 60 ... Interconnector part 70 ... Flow path 71 ... Outward path 72 ... Return path 73 ... Connection part FC1 ... Fuel cell

Claims (5)

A fuel cell that operates by a first gas containing one of a fuel gas and an oxidant gas and a second gas containing the other,
A first electrode corresponding to the first gas; a second electrode corresponding to the second gas; an electrolyte portion disposed between the first electrode and the second electrode; Interconnected interconnector parts, and a support for supporting the first electrode, the second electrode, the electrolyte part, and the interconnector part,
A first reaction part composed of the first electrode and the second electrode formed across the electrolyte part and the electrolyte part is formed on a part of the outer surface of the support;
The interconnector portion is formed on the outer surface of the support and the remaining portion where the first reaction portion is not formed,
The support is formed of a conductive material, and a flow path through which the first gas flows is formed inside the support, and the flow path includes an outward path through which the first gas flows. , And a return path from which the first gas that has flowed into the forward path turns back and flows out,
The forward path and the return path are formed by being partitioned by a partition portion,
The fuel cell according to claim 1, wherein a gas permeability of the partition portion is lower than a gas permeability of the support. A fuel cell that operates by a first gas containing one of a fuel gas and an oxidant gas and a second gas containing the other,
An electrode support formed of a first electrode material corresponding to the first gas, a second electrode corresponding to the second gas, and an electrolyte portion disposed between the electrode support and the second electrode And an interconnector portion electrically connected to the electrode support,
The electrolyte portion is formed on a part of the outer surface of the electrode support, and the second electrode portion is formed on the formed electrolyte portion to form a second reaction portion,
The interconnector portion is formed on the outer surface of the electrode support and the remaining portion where the electrolyte portion is not formed,
The electrode support supports the second electrode, the electrolyte part, and the interconnector part, and a flow path through which the first gas flows is formed inside the electrode support. Includes a forward path through which the first gas flows, and a return path through which the first gas that has flowed into the forward path returns.
The forward path and the return path are formed by being partitioned by a partition portion,
The fuel cell according to claim 1, wherein a gas permeability of the partition portion is lower than a gas permeability of the support.   The fuel cell according to claim 1, wherein at least a part of the partition portion is formed of a dense body.   The fuel cell according to claim 3, wherein a surface of the partitioning portion that is in contact with the forward path or the return path is formed of a dense body.   A fuel cell comprising a plurality of the fuel cells according to claim 1, wherein the plurality of fuel cells are electrically connected to each other.

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