WO2015186370A1 - Fuel cell unit - Google Patents

Fuel cell unit Download PDF

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Publication number
WO2015186370A1
WO2015186370A1 PCT/JP2015/051298 JP2015051298W WO2015186370A1 WO 2015186370 A1 WO2015186370 A1 WO 2015186370A1 JP 2015051298 W JP2015051298 W JP 2015051298W WO 2015186370 A1 WO2015186370 A1 WO 2015186370A1
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WIPO (PCT)
Prior art keywords
separator
manifold
axis direction
fuel cell
anode
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Application number
PCT/JP2015/051298
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French (fr)
Japanese (ja)
Inventor
中居　秀朗
洋輔 佐藤
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株式会社 村田製作所
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Priority to JP2016525710A priority Critical patent/JP6260695B2/en
Publication of WO2015186370A1 publication Critical patent/WO2015186370A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the present invention relates to a fuel cell unit, and more particularly to a fuel cell unit that generates electric power by supplying a fuel electrode gas and an air electrode gas respectively to a fuel electrode and an air electrode that sandwich an electrolyte.
  • Patent Document 1 also proposes a fuel cell unit that discharges a part of the fuel gas from the fuel cell and burns it with high-temperature outside air.
  • the fuel cell unit of Patent Document 1 has a structure in which the fuel electrode is exposed to the outside air. For this reason, metallic nickel constituting the fuel electrode is oxidized by the outside air, and oxide ions are solid-phase diffused in the fuel electrode. As a result, there is a problem that OCV (Open Circuit Voltage) decreases due to wasteful fuel consumption for reducing nickel oxide, and the fuel electrode is damaged by repeated oxidation and reduction. This problem, when clogged, causes a decrease in power generation efficiency.
  • OCV Open Circuit Voltage
  • a main object of the present invention is to provide a fuel cell unit that can increase power generation efficiency.
  • the fuel cell unit of the present invention includes a plate-shaped electrolyte, a fuel electrode provided on one main surface side of the electrolyte, an air electrode provided on the other main surface side of the electrolyte, and a fuel electrode along the fuel electrode.
  • a fuel cell unit comprising a separator having a fuel electrode gas flow path for flowing gas and an air electrode gas flow path for flowing air electrode gas along the air electrode, wherein the oxidation suppression unit is connected to the discharge port of the fuel electrode gas flow path. It is provided between the fuel electrodes.
  • the material of the oxidation inhibiting part is the same as the material of the electrolyte.
  • the material of the oxidation inhibiting part is the same as the material of the separator.
  • the oxidation suppressing portion when viewed from a direction orthogonal to the main surface of the electrolyte, is located outside the region where the fuel electrode and the air electrode overlap.
  • the separator is a first partial separator that faces the electrolyte via the fuel electrode and has a fuel electrode gas flow path, and a second partial separator that faces the electrolyte via the air electrode and has an air electrode gas flow path. including.
  • the fuel electrode gas discharged from the fuel electrode gas flow path reacts with the air electrode gas discharged from the air electrode gas flow path and burns. As a result, thermal independence is achieved.
  • an oxidation suppression unit that suppresses oxidation of the fuel electrode is provided between the discharge port of the fuel electrode gas flow path and the fuel electrode. As a result, solid phase diffusion of oxide ions in the fuel electrode is suppressed, and as a result, a decrease in OCV due to wasteful fuel consumption for reduction and damage to the fuel electrode due to repeated oxidation and reduction are suppressed. Thus, the power generation efficiency is improved.
  • FIG. 3 It is a perspective view which shows the external appearance of the fuel cell unit of this Example. It is an illustration figure which shows the state which decomposed
  • the fuel cell unit 10 of this embodiment is a solid oxide fuel cell unit, and includes a rectangular parallelepiped fuel cell stack 12.
  • the fuel cell stack 12 is supported by a plate-shaped holder 14, and the upper surface of the fuel cell stack 12 is covered with an end plate 16.
  • the X axis, the Y axis, and the Z axis are assigned to the width direction, the depth direction, and the height direction of the fuel cell unit 10.
  • the fuel cell stack 12 is composed of a plurality of fuel cells 12cl, 12cl,... Each formed in a plate shape and stacked in the Z-axis direction.
  • the fuel cell stack 12 is composed of a plurality of fuel cells 12cl, 12cl,... Each formed in a plate shape and stacked in the Z-axis direction.
  • Two manifolds MFf1 and MFf2 for hydrogen gas (fuel electrode gas) and two manifolds MFa1 and MFa2 for oxygen gas (air electrode gas) are formed. Is done. All of manifolds MFf1, MFf2, MFa1 and MFa2 penetrate fuel cell 12cl along the Z axis, and open on both main surfaces of fuel cell 12cl.
  • the manifolds MFf1 and MFf2 are formed in a strip shape on a straight line extending in the Y-axis direction with the center of the main surface of the fuel cell 12cl as a base point, and the manifolds MFa1 and MFa2 extend from the center of the main surface of the fuel cell 12cl. It is formed in a strip shape on a straight line extending in the X-axis direction as a base point. More specifically, the manifold MFf1 is located on the positive side in the Y axis direction from the center of the main surface, and the manifold MFf2 is located on the negative side in the Y axis direction from the center of the main surface. The manifold MFa1 is located on the positive side in the X-axis direction from the center of the main surface, and the manifold MFa2 is located on the negative side in the X-axis direction from the center of the main surface.
  • two hydrogen gas discharge ports HLf1 and HLf2 for discharging hydrogen gas introduced from a hydrogen gas introduction port (not shown) and two oxygen gases introduced from an oxygen gas introduction port (not shown) are discharged.
  • Oxygen gas outlets HLa1 and HLa2 are provided.
  • the position and size of the hydrogen gas discharge port HLf1 match the position and size of the manifold MFf1
  • the position and size of the hydrogen gas discharge port HLf2 match with the position and size of the manifold MFf2.
  • the position and size of the oxygen gas outlet HLa1 match the position and size of the manifold MFa1
  • the position and size of the oxygen gas outlet HLa2 matches the position and size of the manifold MFa2.
  • the hydrogen gas introduced into the holder 14 is introduced into the hydrogen gas outlet HLf1 and the manifold MFf1, and is introduced into the hydrogen gas outlet HLf2 and the manifold MFf2.
  • the oxygen gas introduced into the holder 14 is introduced into the oxygen gas outlet HLa1 and the manifold MFa1, and is introduced into the oxygen gas outlet HLa2 and the manifold MFa2.
  • a fuel cell 12cl includes a cathode-side conductor layer 121 having a separator SP1 as a base material, a cathode layer 122 having a separator SP2 as a base material, an electrolyte layer 123 having an electrolyte EL as a base material, and a separator SP4. And the anode side conductor layer 125 having the separator SP5 as a base material are laminated in this order.
  • Separator SP2 includes partial separators SP201 and SP202
  • separator SP4 includes partial separators SP401 and SP402, and further includes partial separators (oxidation suppression units) SP403 to SP406. Details will be described later with reference to FIG.
  • the manifold MFf1 includes a manifold MFf11 formed on the cathode side conductor layer 121, a manifold MFf12 formed on the cathode layer 122, a manifold MFf13 formed on the electrolyte layer 123, a manifold MFf14 formed on the anode layer 124, and an anode side conductor. It consists of a manifold MFf15 formed in the layer 125.
  • the manifold MFf2 includes a manifold MFf21 formed on the cathode-side conductor layer 121, a manifold MFf22 formed on the cathode layer 122, a manifold MFf23 formed on the electrolyte layer 123, a manifold MFf24 formed on the anode layer 124, and an anode-side conductor. It consists of a manifold MFf 25 formed in the layer 125.
  • the manifold MFa1 includes a manifold MFa11 formed on the cathode-side conductor layer 121, a manifold MFa12 formed on the cathode layer 122, a manifold MFa13 formed on the electrolyte layer 123, a manifold MFa14 formed on the anode layer 124, and an anode-side conductor. It consists of a manifold MFa15 formed in the layer 125.
  • the manifold MFa2 includes a manifold MFa21 formed on the cathode-side conductor layer 121, a manifold MFa22 formed on the cathode layer 122, a manifold MFa23 formed on the electrolyte layer 123, a manifold MFa24 formed on the anode layer 124, and an anode-side conductor. It consists of a manifold MFa25 formed in the layer 125.
  • a plurality of via conductors VHa, VHa,... are provided on the separator SP1 forming the cathode side conductor layer 121. All the via conductors VHa are provided at positions avoiding the manifolds MFf11, MFf21, MFa11, and MFa21, and one end and the other end thereof are exposed on the upper surface and the lower surface of the separator SP1, respectively.
  • a plurality of grooves (air electrode gas flow paths) GRa, GRa,... Arranged in the X-axis direction are provided on the upper surface of the separator SP1 so that each extends along the Y-axis.
  • one end reaches the side surface of the separator SP1 facing the positive side in the Y-axis direction, and the other end reaches the side surface of the separator SP1 facing the negative side in the Y-axis direction. Therefore, both ends of the groove GRa form oxygen gas discharge ports.
  • the cathode layer 122 is provided with plate-like cathodes (air electrodes) CT1 to CT4 having the same thickness as the separator SP2.
  • the cathode CT1 is provided at a position on the positive side in the X-axis direction with respect to the manifold MFf12 and at a position on the positive side in the Y-axis direction with respect to the manifold MFa12.
  • the cathode CT2 is provided at a position on the positive side in the X-axis direction from the manifold MFf22 and a position on the negative side in the Y-axis direction from the manifold MFa12.
  • the cathode CT3 is provided at a position on the negative side in the X-axis direction from the manifold MFf12 and at a position on the positive side in the Y-axis direction from the manifold MFa22.
  • the cathode CT4 is provided at a position on the negative side in the X-axis direction from the manifold MFf22 and a position on the negative side in the Y-axis direction from the manifold MFa22.
  • the separator SP2 is partially missing in the region where the cathodes CT1 to CT4 are provided, and the cathode layer 122 is formed by the separator SP2 and the cathodes CT1 to CT4.
  • the side surface of the cathode CT1 facing the positive side in the Y-axis direction forms a part of the outer surface of the cathode layer 122 facing the positive side in the Y-axis direction, and the side surface of the cathode CT1 facing the negative side in the Y-axis direction is The entire inner surface of the manifold MFa12 facing the negative side of the direction is formed.
  • Two side surfaces of the cathode CT1 orthogonal to the X axis are covered with a separator SP2.
  • the side surface of the cathode CT2 facing the negative side in the Y-axis direction forms a part of the outer surface of the cathode layer 122 facing the negative side in the Y-axis direction, and the side surface of the cathode CT2 facing the positive side in the Y-axis direction is All of the inner surface of the manifold MFa12 facing the positive side of the direction is formed.
  • Two side surfaces of the cathode CT2 orthogonal to the X axis are covered with the separator SP2.
  • the side surface of the cathode CT3 facing the positive side in the Y-axis direction is a part of the outer surface of the cathode layer 122 facing the positive side in the Y-axis direction, and the side surface of the cathode CT3 facing the negative side in the Y-axis direction is The entire inner surface of the manifold MFa22 facing the negative side of the direction is formed. Two side surfaces of the cathode CT3 orthogonal to the X axis are covered with the separator SP2.
  • the side surface of the cathode CT4 facing the negative side in the Y-axis direction is a part of the outer surface of the cathode layer 122 facing the negative side in the Y-axis direction, and the side surface of the cathode CT4 facing the positive side in the Y-axis direction is All of the inner surface of the manifold MFa 22 facing the positive side of the direction is formed.
  • Two side surfaces of the cathode CT4 orthogonal to the X axis are covered with the separator SP2.
  • the manifolds MFf12 and MFf22 penetrate the separator SP2 in the Z-axis direction.
  • the anode layer 124 is provided with plate-like anodes (fuel electrodes) AN1 to AN4 having the same thickness as the separator SP4.
  • the anode AN1 is provided at a position on the positive side in the X-axis direction from the manifold MFf14 and at a position on the positive side in the Y-axis direction from the manifold MFa14.
  • the anode AN2 is provided at a position on the positive side in the X-axis direction from the manifold MFf24 and a position on the negative side in the Y-axis direction from the manifold MFa14.
  • the anode AN3 is provided at a position on the negative side in the X-axis direction from the manifold MFf14 and at a position on the positive side in the Y-axis direction from the manifold MFa24.
  • the anode AN4 is provided at a position on the negative side in the X-axis direction from the manifold MFf24 and a position on the negative side in the Y-axis direction from the manifold MFa24.
  • the separator SP4 is partially missing in the region where the anodes AN1 to AN4 are provided, and the anode layer 124 is formed by the separator SP4 and the anodes AN1 to AN4.
  • the side surface of the anode AN1 facing the negative side in the X-axis direction forms the entire inner surface of the manifold MFf14 facing the negative side in the X-axis direction. Any remaining side surfaces of the anode AN1 are covered with the separator SP4.
  • the side surface of the anode AN2 facing the negative side in the X-axis direction forms the entire inner surface of the manifold MFf24 facing the negative side in the X-axis direction. Any remaining side surfaces of the anode AN2 are covered with the separator SP4.
  • the side surface of the anode AN3 facing the positive side in the X-axis direction forms the entire inner surface of the manifold MFf14 facing the positive side in the X-axis direction. Any remaining side surfaces of the anode AN3 are covered by the separator SP4.
  • the side surface of the anode AN4 facing the positive side in the X-axis direction forms the entire inner surface of the manifold MFf24 facing the positive side in the X-axis direction. Any remaining side surfaces of the anode AN4 are covered with the separator SP4.
  • the manifolds MFa14 and MFa24 penetrate the separator SP4 in the Z-axis direction.
  • a plurality of via conductors VHf, VHf,... are provided in the separator SP5 forming the anode side conductor layer 125.
  • the via conductor VHf is provided at a position that avoids the manifolds MFf15, MFf25, MFa15, and MFa25, and one end and the other end thereof are exposed on the upper surface and the lower surface of the separator SP5, respectively.
  • the lower surface of separator SP1 is provided with a plurality of grooves (fuel electrode gas flow paths) GRf, GRf,... Arranged in the Y-axis direction so that each extends along the X-axis. .
  • one end reaches the side surface of the separator SP5 facing the positive side in the X-axis direction
  • the other end reaches the side surface of the separator SP5 facing the negative side in the X-axis direction. Therefore, both ends of the groove GRf form hydrogen gas discharge ports.
  • the electrolyte layer 123 is formed by forming manifolds MFf13, MFf23, MFa13, and MFa23 on the electrolyte EL.
  • the upper surfaces of the cathodes CT1 to CT4 provided on the cathode layer 122 are disposed on the lower surface of the electrolyte layer 123, and the lower surfaces of the anodes AN1 to AN4 provided on the anode layer 124 are disposed on the upper surface of the electrolyte layer 123.
  • the separator SP1 is opposed to the electrolyte EL via the cathodes CT1 to CT4 and has a plurality of grooves GRa, GRa,. Further, the separator SP5 faces the electrolyte EL through the anodes AN1 to AN4, and has a plurality of grooves GRf, GRf,.
  • the oxygen gas that has flowed through the manifolds MFa1 and MFa2 is discharged to the outside of the fuel cell stack 12 through the grooves GRa, GRa,. Further, the hydrogen gas flowing through the manifolds MFf1 and MFf2 is discharged to the outside of the fuel cell stack 12 through the grooves GRf, GRf,.
  • a part of the hydrogen gas flowing through the grooves GRf, GRf,... Is discharged outside the fuel cell 12cl without causing a chemical reaction.
  • the discharged hydrogen gas reacts with oxygen outside the fuel cell stack 12 and burns. As a result, thermal independence is achieved.
  • the separators SP1 to SP2 and SP4 to SP5 are made of YSZ (yttria stabilized zirconia), ScSZ (scandia stabilized zirconia), LaGaO 3 (lanthanum gallate), or GDC (gadolinium doped ceria).
  • Examples of the electrolyte EL include 92ZrO 2 -8Y 2 O 3 , 90ZrO 2 -10Y 2 O 3 , 97ZrO 2 -3Y 2 O 3 , and 89ZrO 2 -10Sc 2 O 3 -1CeO 2 .
  • the via conductors VHa and VHf are made of LSM (lanthanum strontium manganite), Ag—Pd alloy, or NiO
  • the cathodes CT1 to CT4 are made of LSCF (La 1-x Sr x Co 1-y Fe y O 3 ⁇ ) as a material
  • anodes AN1 to AN4 include 10ScSZ.
  • the side surfaces of cathodes CT1 and CT2 facing the positive side in the X-axis direction are covered by partial separator SP201, and the side surfaces of cathodes CT3 and CT4 facing the negative side in the X-axis direction are also covered by partial separator SP202. Is called.
  • the side surface of the anode AN1 facing the positive side in the X-axis direction is covered with the partial separator SP403, and the side surface of the anode AN2 facing the positive side in the X-axis direction is covered with the partial separator SP404.
  • the side surface of the anode AN3 facing the negative side in the X-axis direction is covered with the partial separator SP405, and the side surface of the anode AN4 facing the negative side in the X-axis direction is covered with the partial separator SP406.
  • the lengths of the partial separators SP201 and SP202 in the X-axis direction are common to each other, and the lengths of the partial separators SP403 to SP406 in the X-axis direction are also common to each other. Further, the length of each of the partial separators SP403 to SP406 in the X-axis direction is shorter than the length of each of the partial separators SP201 and SP202.
  • hydrogen gas flows through manifolds MFf11 to MFf15 and groove GRf, and is discharged to the outside of fuel cell 12cl.
  • the partial separator SP403 is provided between the discharge port of the groove GRf and the anode AN1
  • the partial separator SP404 is provided between the discharge port of the groove GRf and the anode AN2.
  • the partial separator SP405 is provided between the discharge port of the groove GRf and the anode AN3
  • the partial separator SP406 is provided between the discharge port of the groove GRf and the anode AN4.
  • the partial separators SP403 to SP406 By providing the partial separators SP403 to SP406 in this way, the phenomenon that the metallic nickel constituting the anodes AN1 to AN4 is oxidized by the outside air, and the phenomenon that the oxide ions are solid-phase diffused in the anodes AN1 to AN4 is suppressed. .
  • the region where power is generated is a region where the anodes AN1 to AN4 and the cathodes CT1 to CT4 overlap each other when viewed from the Z-axis direction.
  • the partial separators SP403 to SP406 are the overlapping regions when viewed from the Z-axis direction. Located outside of. Therefore, it is possible to avoid a decrease in power generation output due to the provision of the partial separators SP403 to SP406.
  • FIG. 7 shows the relationship between the flow rate of hydrogen gas obtained by the experiment and the OCV.
  • the theoretical value of OCV draws a straight line A.
  • the OCV draws a curve B.
  • the OCV draws a curve C when the partial separators SP403 to SP406 are provided. From this, it can be understood that when the partial separators SP403 to SP406 are provided, the OCV is improved particularly in a range where the flow rate of the hydrogen gas is small.
  • the cathode layer 122 is provided on the lower surface of the electrolyte layer 123, and the anode layer 124 is provided on the upper surface of the electrolyte layer 123.
  • the cathode side conductor layer 121 is provided on the lower surface of the cathode layer 122, and the anode side conductor layer 125 is provided on the upper surface of the anode layer 124.
  • Partial separators SP403 to SP406 are provided between the outlets of the grooves GRf, GRf,... And the anodes AN1 to AN4. Oxidation of the anodes AN1 to AN4 is suppressed by the partial separators SP403 to SP406.
  • the grooves GRa, GRa,... are formed on the upper surface of the cathode side conductor layer 121, and the grooves GRf, GRf,.
  • the anode side conductor layer 125 of the lower fuel cell 12cl is adjacent to the cathode side conductor layer 121 of the upper fuel cell 12cl. Therefore, for the two adjacent conductor layers, one conductor layer is omitted, and grooves GRa, GRa,... And grooves GRf, GRf,... Are formed on the upper and lower surfaces of the other conductor layer, respectively. Also good.
  • the material of the partial separators SP403 to SP406 is matched to the material of the separator SP4.
  • the material of the partial separators SP403 to SP406 may be matched with the material of the electrolyte EL.
  • Fuel cell unit 12cl Fuel cell
  • Fuel cell SP1-SP2, SP4-SP5 ... Separator EL ...
  • Electrolyte AN1-AN4 Anode (fuel electrode) CT1 to CT4 ...
  • Cathode (air electrode) GRf ... groove (fuel electrode gas flow path)
  • GRa ... groove (air electrode gas flow path)
  • SP403 to SP406 Partial separator (oxidation suppressing part)

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  • Chemical Kinetics & Catalysis (AREA)
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Abstract

A cathode layer (122) is provided on the lower surface of an electrolyte layer (123), and an anode layer (124) is provided on the upper surface of the electrolyte layer (123). In addition, a cathode-side conductor layer (121) is provided on the lower surface of the cathode layer (122), and an anode-side conductor layer (125) is provided on the upper surface of the anode layer (124). The cathode-side conductor layer (121) is provided with grooves (GRa) which transport an oxygen gas along cathodes (CT1-CT4), and the anode-side conductor layer (125) is provided with grooves (GRf) which transport a hydrogen gas along anodes (AN1-AN4). Partial separators (SP403-SP406) are provided between discharge ports of the grooves (GRf) and the anodes (AN1-AN4). Oxidation of the anodes (AN1-AN4) is suppressed by the partial separators (SP403-SP406).

Description

燃料電池ユニットFuel cell unit
　この発明は、燃料電池ユニットに関し、特に、電解質を挟む燃料極および空気極に燃料極ガスおよび空気極ガスをそれぞれ供給して電力を発生する、燃料電池ユニットに関する。 The present invention relates to a fuel cell unit, and more particularly to a fuel cell unit that generates electric power by supplying a fuel electrode gas and an air electrode gas respectively to a fuel electrode and an air electrode that sandwich an electrolyte.
　高温で動作する固体酸化物型の燃料電池（ＳＯＦＣ）は熱自立を必要とするところ、大抵の場合は、余剰燃料を燃料電池セルの近傍で燃焼させている。特許文献１においても、燃料ガスの一部を燃料電池セルから排出して高温の外気で燃焼させる燃料電池ユニットが提案されている。 A solid oxide fuel cell (SOFC) operating at a high temperature requires heat self-sustaining, and in most cases, surplus fuel is burned in the vicinity of the fuel cell. Patent Document 1 also proposes a fuel cell unit that discharges a part of the fuel gas from the fuel cell and burns it with high-temperature outside air.
国際公開第２００８／０４４４２９号International Publication No. 2008/044429
　しかし、特許文献１の燃料電池ユニットは、燃料極が外気に晒される構造を有する。このため、燃料極を構成する金属ニッケルが外気によって酸化され、さらに酸化物イオンが燃料極内で固相拡散する。この結果、酸化ニッケルを還元するための無駄な燃料消費によってＯＣＶ(Open Circuit Voltage)が低下するとともに、酸化・還元の繰り返しによって燃料極が損傷するという問題がある。この問題は、詰まるところ、発電効率の低下をもたらす。 However, the fuel cell unit of Patent Document 1 has a structure in which the fuel electrode is exposed to the outside air. For this reason, metallic nickel constituting the fuel electrode is oxidized by the outside air, and oxide ions are solid-phase diffused in the fuel electrode. As a result, there is a problem that OCV (Open Circuit Voltage) decreases due to wasteful fuel consumption for reducing nickel oxide, and the fuel electrode is damaged by repeated oxidation and reduction. This problem, when clogged, causes a decrease in power generation efficiency.
　それゆえに、この発明の主たる目的は、発電効率を高めることができる、燃料電池ユニットを提供することである。 Therefore, a main object of the present invention is to provide a fuel cell unit that can increase power generation efficiency.
　この発明の燃料電池ユニットは、板状に形成された電解質、電解質の一方主面側に設けられた燃料極、電解質の他方主面側に設けられた空気極、および燃料極に沿って燃料極ガスを流す燃料極ガス流路と空気極に沿って空気極ガスを流す空気極ガス流路とを有するセパレータを備える燃料電池ユニットであって、酸化抑制部が燃料極ガス流路の排出口と燃料極との間に設けられている。 The fuel cell unit of the present invention includes a plate-shaped electrolyte, a fuel electrode provided on one main surface side of the electrolyte, an air electrode provided on the other main surface side of the electrolyte, and a fuel electrode along the fuel electrode. A fuel cell unit comprising a separator having a fuel electrode gas flow path for flowing gas and an air electrode gas flow path for flowing air electrode gas along the air electrode, wherein the oxidation suppression unit is connected to the discharge port of the fuel electrode gas flow path. It is provided between the fuel electrodes.
　好ましくは、酸化抑制部の材料は電解質の材料と同じである。 Preferably, the material of the oxidation inhibiting part is the same as the material of the electrolyte.
　好ましくは、酸化抑制部の材料はセパレータの材料と同じである。 Preferably, the material of the oxidation inhibiting part is the same as the material of the separator.
　好ましくは、電解質の主面に直交する方向から眺めたとき酸化抑制部は燃料極および空気極が重複する領域の外側に位置する。 Preferably, when viewed from a direction orthogonal to the main surface of the electrolyte, the oxidation suppressing portion is located outside the region where the fuel electrode and the air electrode overlap.
　好ましくは、セパレータは、燃料極を介して電解質と対向しかつ燃料極ガス流路を有する第１部分セパレータ、および空気極を介して電解質と対向しかつ空気極ガス流路を有する第２部分セパレータを含む。 Preferably, the separator is a first partial separator that faces the electrolyte via the fuel electrode and has a fuel electrode gas flow path, and a second partial separator that faces the electrolyte via the air electrode and has an air electrode gas flow path. including.
　燃料極ガス流路から排出された燃料極ガスは、空気極ガス流路から排出された空気極ガスと反応して燃焼する。これによって熱自立が図られる。ここで、燃料極ガス流路の排出口と燃料極との間には、燃料極の酸化を抑制する酸化抑制部が設けられる。これによって、燃料極内での酸化物イオンの固相拡散が抑制され、ひいては還元のための無駄な燃料消費によるＯＣＶの低下や、酸化・還元の繰り返しによる燃料極の損傷が抑制される。こうして、発電効率の向上が図られる。 The fuel electrode gas discharged from the fuel electrode gas flow path reacts with the air electrode gas discharged from the air electrode gas flow path and burns. As a result, thermal independence is achieved. Here, an oxidation suppression unit that suppresses oxidation of the fuel electrode is provided between the discharge port of the fuel electrode gas flow path and the fuel electrode. As a result, solid phase diffusion of oxide ions in the fuel electrode is suppressed, and as a result, a decrease in OCV due to wasteful fuel consumption for reduction and damage to the fuel electrode due to repeated oxidation and reduction are suppressed. Thus, the power generation efficiency is improved.
　この発明の上述の目的，その他の目的，特徴および利点は、図面を参照して行う以下の実施例の詳細な説明から一層明らかとなろう。 The above object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.
この実施例の燃料電池ユニットの外観を示す斜視図である。It is a perspective view which shows the external appearance of the fuel cell unit of this Example. 図１に示す燃料電池ユニットを分解した状態を示す図解図である。It is an illustration figure which shows the state which decomposed | disassembled the fuel cell unit shown in FIG. 図２に示す燃料電池セルを分解した状態を示す図解図である。It is an illustration figure which shows the state which decomposed | disassembled the fuel battery cell shown in FIG. 図３に示すアノード側導体層を斜め下から眺めた状態を示す斜視図である。It is a perspective view which shows the state which looked at the anode side conductor layer shown in FIG. 3 from diagonally downward. 図３に示すカソード層およびアノード層を拡大して示す斜視図である。It is a perspective view which expands and shows the cathode layer and anode layer which are shown in FIG. 図２に示す燃料電池セルの或る断面を示す断面図である。It is sectional drawing which shows a certain cross section of the fuel cell shown in FIG. 燃料極ガスの流量とＯＣＶとの関係を示すグラフである。It is a graph which shows the relationship between the flow volume of fuel electrode gas, and OCV.
　図１および図２を参照して、この実施例の燃料電池ユニット１０は、固体酸化物型の燃料電池ユニットであり、直方体状の燃料電池スタック１２を含む。燃料電池スタック１２は板状のホルダ１４によって支持され、燃料電池スタック１２の上面はエンドプレート１６によって覆われる。なお、この実施例では、燃料電池ユニット１０の幅方向，奥行き方向および高さ方向にＸ軸，Ｙ軸およびＺ軸を割り当てる。 1 and 2, the fuel cell unit 10 of this embodiment is a solid oxide fuel cell unit, and includes a rectangular parallelepiped fuel cell stack 12. The fuel cell stack 12 is supported by a plate-shaped holder 14, and the upper surface of the fuel cell stack 12 is covered with an end plate 16. In this embodiment, the X axis, the Y axis, and the Z axis are assigned to the width direction, the depth direction, and the height direction of the fuel cell unit 10.
　図２を参照して、燃料電池スタック１２は、各々が板状に形成されてＺ軸方向に積層された複数の燃料電池セル１２ｃｌ，１２ｃｌ，…からなる。複数の燃料電池セル１２ｃｌ，１２ｃｌ，…の各々には、水素ガス（燃料極ガス）用の２つのマニホールドＭＦｆ１およびＭＦｆ２と、酸素ガス（空気極ガス）用の２つのマニホールドＭＦａ１およびＭＦａ２とが形成される。マニホールドＭＦｆ１，ＭＦｆ２，ＭＦａ１およびＭＦａ２のいずれも、Ｚ軸に沿って燃料電池セル１２ｃｌを貫通し、燃料電池セル１２ｃｌの両主面に開口する。 Referring to FIG. 2, the fuel cell stack 12 is composed of a plurality of fuel cells 12cl, 12cl,... Each formed in a plate shape and stacked in the Z-axis direction. In each of the plurality of fuel cells 12cl, 12cl,..., Two manifolds MFf1 and MFf2 for hydrogen gas (fuel electrode gas) and two manifolds MFa1 and MFa2 for oxygen gas (air electrode gas) are formed. Is done. All of manifolds MFf1, MFf2, MFa1 and MFa2 penetrate fuel cell 12cl along the Z axis, and open on both main surfaces of fuel cell 12cl.
　Ｚ軸方向から眺めると、マニホールドＭＦｆ１およびＭＦｆ２は燃料電池セル１２ｃｌの主面中央を基点としてＹ軸方向に延びる直線上に帯状に形成され、マニホールドＭＦａ１およびＭＦａ２は燃料電池セル１２ｃｌの主面中央を基点としてＸ軸方向に延びる直線上に帯状に形成される。より詳しくは、マニホールドＭＦｆ１は主面中央よりもＹ軸方向の正側に位置し、マニホールドＭＦｆ２は主面中央よりもＹ軸方向の負側に位置する。また、マニホールドＭＦａ１は主面中央よりもＸ軸方向の正側に位置し、マニホールドＭＦａ２は主面中央よりもＸ軸方向の負側に位置する。 When viewed from the Z-axis direction, the manifolds MFf1 and MFf2 are formed in a strip shape on a straight line extending in the Y-axis direction with the center of the main surface of the fuel cell 12cl as a base point, and the manifolds MFa1 and MFa2 extend from the center of the main surface of the fuel cell 12cl. It is formed in a strip shape on a straight line extending in the X-axis direction as a base point. More specifically, the manifold MFf1 is located on the positive side in the Y axis direction from the center of the main surface, and the manifold MFf2 is located on the negative side in the Y axis direction from the center of the main surface. The manifold MFa1 is located on the positive side in the X-axis direction from the center of the main surface, and the manifold MFa2 is located on the negative side in the X-axis direction from the center of the main surface.
　ホルダ１４の上面には、図示しない水素ガス導入口から導入された水素ガスを排出する２つの水素ガス排出口ＨＬｆ１およびＨＬｆ２と、図示しない酸素ガス導入口から導入された酸素ガスを排出する２つの酸素ガス排出口ＨＬａ１およびＨＬａ２とが設けられる。Ｚ軸方向から眺めて、水素ガス排出口ＨＬｆ１の位置およびサイズはマニホールドＭＦｆ１の位置およびサイズと一致し、水素ガス排出口ＨＬｆ２の位置およびサイズはマニホールドＭＦｆ２の位置およびサイズと一致する。同様に、酸素ガス排出口ＨＬａ１の位置およびサイズはマニホールドＭＦａ１の位置およびサイズと一致し、酸素ガス排出口ＨＬａ２の位置およびサイズはマニホールドＭＦａ２の位置およびサイズと一致する。 On the upper surface of the holder 14, two hydrogen gas discharge ports HLf1 and HLf2 for discharging hydrogen gas introduced from a hydrogen gas introduction port (not shown) and two oxygen gases introduced from an oxygen gas introduction port (not shown) are discharged. Oxygen gas outlets HLa1 and HLa2 are provided. When viewed from the Z-axis direction, the position and size of the hydrogen gas discharge port HLf1 match the position and size of the manifold MFf1, and the position and size of the hydrogen gas discharge port HLf2 match with the position and size of the manifold MFf2. Similarly, the position and size of the oxygen gas outlet HLa1 match the position and size of the manifold MFa1, and the position and size of the oxygen gas outlet HLa2 matches the position and size of the manifold MFa2.
　したがって、ホルダ１４に導入された水素ガスは、水素ガス排出口ＨＬｆ１およびマニホールドＭＦｆ１に導入されるとともに、水素ガス排出口ＨＬｆ２およびマニホールドＭＦｆ２に導入される。同様に、ホルダ１４に導入された酸素ガスは、酸素ガス排出口ＨＬａ１およびマニホールドＭＦａ１に導入されるとともに、酸素ガス排出口ＨＬａ２およびマニホールドＭＦａ２に導入される。 Therefore, the hydrogen gas introduced into the holder 14 is introduced into the hydrogen gas outlet HLf1 and the manifold MFf1, and is introduced into the hydrogen gas outlet HLf2 and the manifold MFf2. Similarly, the oxygen gas introduced into the holder 14 is introduced into the oxygen gas outlet HLa1 and the manifold MFa1, and is introduced into the oxygen gas outlet HLa2 and the manifold MFa2.
　図３を参照して、燃料電池セル１２ｃｌは、セパレータＳＰ１を基材とするカソード側導体層１２１，セパレータＳＰ２を基材とするカソード層１２２，電解質ＥＬを基材とする電解質層１２３，セパレータＳＰ４を基材とするアノード層１２４，およびセパレータＳＰ５を基材とするアノード側導体層１２５がこの順で積層されてなる。なお、セパレータＳＰ２は部分セパレータＳＰ２０１およびＳＰ２０２を含み、セパレータＳＰ４は、部分セパレータＳＰ４０１およびＳＰ４０２を含み、さらに部分セパレータ（酸化抑制部）ＳＰ４０３～ＳＰ４０６を含む。詳しくは、図５を参照して後述する。 Referring to FIG. 3, a fuel cell 12cl includes a cathode-side conductor layer 121 having a separator SP1 as a base material, a cathode layer 122 having a separator SP2 as a base material, an electrolyte layer 123 having an electrolyte EL as a base material, and a separator SP4. And the anode side conductor layer 125 having the separator SP5 as a base material are laminated in this order. Separator SP2 includes partial separators SP201 and SP202, separator SP4 includes partial separators SP401 and SP402, and further includes partial separators (oxidation suppression units) SP403 to SP406. Details will be described later with reference to FIG.
　マニホールドＭＦｆ１は、カソード側導体層１２１に形成されたマニホールドＭＦｆ１１，カソード層１２２に形成されたマニホールドＭＦｆ１２，電解質層１２３に形成されたマニホールドＭＦｆ１３，アノード層１２４に形成されたマニホールドＭＦｆ１４，およびアノード側導体層１２５に形成されたマニホールドＭＦｆ１５からなる。 The manifold MFf1 includes a manifold MFf11 formed on the cathode side conductor layer 121, a manifold MFf12 formed on the cathode layer 122, a manifold MFf13 formed on the electrolyte layer 123, a manifold MFf14 formed on the anode layer 124, and an anode side conductor. It consists of a manifold MFf15 formed in the layer 125.
　マニホールドＭＦｆ２は、カソード側導体層１２１に形成されたマニホールドＭＦｆ２１，カソード層１２２に形成されたマニホールドＭＦｆ２２，電解質層１２３に形成されたマニホールドＭＦｆ２３，アノード層１２４に形成されたマニホールドＭＦｆ２４，およびアノード側導体層１２５に形成されたマニホールドＭＦｆ２５からなる。 The manifold MFf2 includes a manifold MFf21 formed on the cathode-side conductor layer 121, a manifold MFf22 formed on the cathode layer 122, a manifold MFf23 formed on the electrolyte layer 123, a manifold MFf24 formed on the anode layer 124, and an anode-side conductor. It consists of a manifold MFf 25 formed in the layer 125.
　マニホールドＭＦａ１は、カソード側導体層１２１に形成されたマニホールドＭＦａ１１，カソード層１２２に形成されたマニホールドＭＦａ１２，電解質層１２３に形成されたマニホールドＭＦａ１３，アノード層１２４に形成されたマニホールドＭＦａ１４，およびアノード側導体層１２５に形成されたマニホールドＭＦａ１５からなる。 The manifold MFa1 includes a manifold MFa11 formed on the cathode-side conductor layer 121, a manifold MFa12 formed on the cathode layer 122, a manifold MFa13 formed on the electrolyte layer 123, a manifold MFa14 formed on the anode layer 124, and an anode-side conductor. It consists of a manifold MFa15 formed in the layer 125.
　マニホールドＭＦａ２は、カソード側導体層１２１に形成されたマニホールドＭＦａ２１，カソード層１２２に形成されたマニホールドＭＦａ２２，電解質層１２３に形成されたマニホールドＭＦａ２３，アノード層１２４に形成されたマニホールドＭＦａ２４，およびアノード側導体層１２５に形成されたマニホールドＭＦａ２５からなる。 The manifold MFa2 includes a manifold MFa21 formed on the cathode-side conductor layer 121, a manifold MFa22 formed on the cathode layer 122, a manifold MFa23 formed on the electrolyte layer 123, a manifold MFa24 formed on the anode layer 124, and an anode-side conductor. It consists of a manifold MFa25 formed in the layer 125.
　カソード側導体層１２１をなすセパレータＳＰ１には、複数のビア導体ＶＨａ，ＶＨａ，…が設けられる。いずれのビア導体ＶＨａもマニホールドＭＦｆ１１，ＭＦｆ２１，ＭＦａ１１およびＭＦａ２１を回避する位置に設けられ、その一方端および他方端はそれぞれセパレータＳＰ１の上面および下面に露出する。 A plurality of via conductors VHa, VHa,... Are provided on the separator SP1 forming the cathode side conductor layer 121. All the via conductors VHa are provided at positions avoiding the manifolds MFf11, MFf21, MFa11, and MFa21, and one end and the other end thereof are exposed on the upper surface and the lower surface of the separator SP1, respectively.
　また、セパレータＳＰ１の上面には、各々がＹ軸に沿って延びるようにＸ軸方向に並ぶ複数の溝（空気極ガス流路）ＧＲａ，ＧＲａ，…が設けられる。溝ＧＲａ，ＧＲａ，…の一部はマニホールドＭＦａ１１を跨ぎ、溝ＧＲａ，ＧＲａ，…の他の一部はマニホールドＭＦａ２１を跨ぐ。ただし、いずれの溝ＧＲａについても、一方端はＹ軸方向の正側を向くセパレータＳＰ１の側面に達し、他方端はＹ軸方向の負側を向くセパレータＳＰ１の側面に達する。したがって、溝ＧＲａの両端は酸素ガスの排出口をなす。 Further, a plurality of grooves (air electrode gas flow paths) GRa, GRa,... Arranged in the X-axis direction are provided on the upper surface of the separator SP1 so that each extends along the Y-axis. A part of the grooves GRa, GRa,... Straddles the manifold MFa11, and another part of the grooves GRa, GRa,. However, in any of the grooves GRa, one end reaches the side surface of the separator SP1 facing the positive side in the Y-axis direction, and the other end reaches the side surface of the separator SP1 facing the negative side in the Y-axis direction. Therefore, both ends of the groove GRa form oxygen gas discharge ports.
　カソード層１２２には、セパレータＳＰ２の厚みと同じ厚みを有する板状のカソード（空気極）ＣＴ１～ＣＴ４が設けられる。ここで、カソードＣＴ１は、マニホールドＭＦｆ１２よりもＸ軸方向における正側の位置でかつマニホールドＭＦａ１２よりもＹ軸方向における正側の位置に設けられる。カソードＣＴ２は、マニホールドＭＦｆ２２よりもＸ軸方向における正側の位置でかつマニホールドＭＦａ１２よりもＹ軸方向における負側の位置に設けられる。 The cathode layer 122 is provided with plate-like cathodes (air electrodes) CT1 to CT4 having the same thickness as the separator SP2. Here, the cathode CT1 is provided at a position on the positive side in the X-axis direction with respect to the manifold MFf12 and at a position on the positive side in the Y-axis direction with respect to the manifold MFa12. The cathode CT2 is provided at a position on the positive side in the X-axis direction from the manifold MFf22 and a position on the negative side in the Y-axis direction from the manifold MFa12.
　また、カソードＣＴ３は、マニホールドＭＦｆ１２よりもＸ軸方向における負側の位置でかつマニホールドＭＦａ２２よりもＹ軸方向における正側の位置に設けられる。カソードＣＴ４は、マニホールドＭＦｆ２２よりもＸ軸方向における負側の位置でかつマニホールドＭＦａ２２よりもＹ軸方向における負側の位置に設けられる。 The cathode CT3 is provided at a position on the negative side in the X-axis direction from the manifold MFf12 and at a position on the positive side in the Y-axis direction from the manifold MFa22. The cathode CT4 is provided at a position on the negative side in the X-axis direction from the manifold MFf22 and a position on the negative side in the Y-axis direction from the manifold MFa22.
　つまり、セパレータＳＰ２はカソードＣＴ１～ＣＴ４が設けられる領域において部分的に欠落し、セパレータＳＰ２とカソードＣＴ１～ＣＴ４とによってカソード層１２２が形成される。 That is, the separator SP2 is partially missing in the region where the cathodes CT1 to CT4 are provided, and the cathode layer 122 is formed by the separator SP2 and the cathodes CT1 to CT4.
　Ｙ軸方向の正側を向くカソードＣＴ１の側面は、Ｙ軸方向の正側を向くカソード層１２２の外側面の一部をなし、Ｙ軸方向の負側を向くカソードＣＴ１の側面は、Ｙ軸方向の負側を向くマニホールドＭＦａ１２の内側面の全部をなす。Ｘ軸に直交するカソードＣＴ１の２つの側面は、セパレータＳＰ２によって覆われる。 The side surface of the cathode CT1 facing the positive side in the Y-axis direction forms a part of the outer surface of the cathode layer 122 facing the positive side in the Y-axis direction, and the side surface of the cathode CT1 facing the negative side in the Y-axis direction is The entire inner surface of the manifold MFa12 facing the negative side of the direction is formed. Two side surfaces of the cathode CT1 orthogonal to the X axis are covered with a separator SP2.
　Ｙ軸方向の負側を向くカソードＣＴ２の側面は、Ｙ軸方向の負側を向くカソード層１２２の外側面の一部をなし、Ｙ軸方向の正側を向くカソードＣＴ２の側面は、Ｙ軸方向の正側を向くマニホールドＭＦａ１２の内側面の全部をなす。Ｘ軸に直交するカソードＣＴ２の２つの側面は、セパレータＳＰ２によって覆われる。 The side surface of the cathode CT2 facing the negative side in the Y-axis direction forms a part of the outer surface of the cathode layer 122 facing the negative side in the Y-axis direction, and the side surface of the cathode CT2 facing the positive side in the Y-axis direction is All of the inner surface of the manifold MFa12 facing the positive side of the direction is formed. Two side surfaces of the cathode CT2 orthogonal to the X axis are covered with the separator SP2.
　Ｙ軸方向の正側を向くカソードＣＴ３の側面は、Ｙ軸方向の正側を向くカソード層１２２の外側面の一部をなし、Ｙ軸方向の負側を向くカソードＣＴ３の側面は、Ｙ軸方向の負側を向くマニホールドＭＦａ２２の内側面の全部をなす。Ｘ軸に直交するカソードＣＴ３の２つの側面は、セパレータＳＰ２によって覆われる。 The side surface of the cathode CT3 facing the positive side in the Y-axis direction is a part of the outer surface of the cathode layer 122 facing the positive side in the Y-axis direction, and the side surface of the cathode CT3 facing the negative side in the Y-axis direction is The entire inner surface of the manifold MFa22 facing the negative side of the direction is formed. Two side surfaces of the cathode CT3 orthogonal to the X axis are covered with the separator SP2.
　Ｙ軸方向の負側を向くカソードＣＴ４の側面は、Ｙ軸方向の負側を向くカソード層１２２の外側面の一部をなし、Ｙ軸方向の正側を向くカソードＣＴ４の側面は、Ｙ軸方向の正側を向くマニホールドＭＦａ２２の内側面の全部をなす。Ｘ軸に直交するカソードＣＴ４の２つの側面は、セパレータＳＰ２によって覆われる。なお、マニホールドＭＦｆ１２およびＭＦｆ２２は、セパレータＳＰ２をＺ軸方向に貫通してなる。 The side surface of the cathode CT4 facing the negative side in the Y-axis direction is a part of the outer surface of the cathode layer 122 facing the negative side in the Y-axis direction, and the side surface of the cathode CT4 facing the positive side in the Y-axis direction is All of the inner surface of the manifold MFa 22 facing the positive side of the direction is formed. Two side surfaces of the cathode CT4 orthogonal to the X axis are covered with the separator SP2. The manifolds MFf12 and MFf22 penetrate the separator SP2 in the Z-axis direction.
　アノード層１２４には、セパレータＳＰ４の厚みと同じ厚みを有する板状のアノード（燃料極）ＡＮ１～ＡＮ４が設けられる。ここで、アノードＡＮ１は、マニホールドＭＦｆ１４よりもＸ軸方向における正側の位置でかつマニホールドＭＦａ１４よりもＹ軸方向における正側の位置に設けられる。アノードＡＮ２は、マニホールドＭＦｆ２４よりもＸ軸方向における正側の位置でかつマニホールドＭＦａ１４よりもＹ軸方向における負側の位置に設けられる。 The anode layer 124 is provided with plate-like anodes (fuel electrodes) AN1 to AN4 having the same thickness as the separator SP4. Here, the anode AN1 is provided at a position on the positive side in the X-axis direction from the manifold MFf14 and at a position on the positive side in the Y-axis direction from the manifold MFa14. The anode AN2 is provided at a position on the positive side in the X-axis direction from the manifold MFf24 and a position on the negative side in the Y-axis direction from the manifold MFa14.
　また、アノードＡＮ３は、マニホールドＭＦｆ１４よりもＸ軸方向における負側の位置でかつマニホールドＭＦａ２４よりもＹ軸方向における正側の位置に設けられる。アノードＡＮ４は、マニホールドＭＦｆ２４よりもＸ軸方向における負側の位置でかつマニホールドＭＦａ２４よりもＹ軸方向における負側の位置に設けられる。 The anode AN3 is provided at a position on the negative side in the X-axis direction from the manifold MFf14 and at a position on the positive side in the Y-axis direction from the manifold MFa24. The anode AN4 is provided at a position on the negative side in the X-axis direction from the manifold MFf24 and a position on the negative side in the Y-axis direction from the manifold MFa24.
　つまり、セパレータＳＰ４はアノードＡＮ１～ＡＮ４が設けられる領域において部分的に欠落し、セパレータＳＰ４とアノードＡＮ１～ＡＮ４とによってアノード層１２４が形成される。 That is, the separator SP4 is partially missing in the region where the anodes AN1 to AN4 are provided, and the anode layer 124 is formed by the separator SP4 and the anodes AN1 to AN4.
　Ｘ軸方向の負側を向くアノードＡＮ１の側面は、Ｘ軸方向の負側を向くマニホールドＭＦｆ１４の内側面の全部をなす。アノードＡＮ１の残りの側面はいずれも、セパレータＳＰ４によって覆われる。Ｘ軸方向の負側を向くアノードＡＮ２の側面は、Ｘ軸方向の負側を向くマニホールドＭＦｆ２４の内側面の全部をなす。アノードＡＮ２の残りの側面はいずれも、セパレータＳＰ４によって覆われる。 The side surface of the anode AN1 facing the negative side in the X-axis direction forms the entire inner surface of the manifold MFf14 facing the negative side in the X-axis direction. Any remaining side surfaces of the anode AN1 are covered with the separator SP4. The side surface of the anode AN2 facing the negative side in the X-axis direction forms the entire inner surface of the manifold MFf24 facing the negative side in the X-axis direction. Any remaining side surfaces of the anode AN2 are covered with the separator SP4.
　Ｘ軸方向の正側を向くアノードＡＮ３の側面は、Ｘ軸方向の正側を向くマニホールドＭＦｆ１４の内側面の全部をなす。アノードＡＮ３の残りの側面はいずれも、セパレータＳＰ４によって覆われる。Ｘ軸方向の正側を向くアノードＡＮ４の側面は、Ｘ軸方向の正側を向くマニホールドＭＦｆ２４の内側面の全部をなす。アノードＡＮ４の残りの側面はいずれも、セパレータＳＰ４によって覆われる。なお、マニホールドＭＦａ１４およびＭＦａ２４は、セパレータＳＰ４をＺ軸方向に貫通してなる。 The side surface of the anode AN3 facing the positive side in the X-axis direction forms the entire inner surface of the manifold MFf14 facing the positive side in the X-axis direction. Any remaining side surfaces of the anode AN3 are covered by the separator SP4. The side surface of the anode AN4 facing the positive side in the X-axis direction forms the entire inner surface of the manifold MFf24 facing the positive side in the X-axis direction. Any remaining side surfaces of the anode AN4 are covered with the separator SP4. The manifolds MFa14 and MFa24 penetrate the separator SP4 in the Z-axis direction.
　アノード側導体層１２５をなすセパレータＳＰ５には、複数のビア導体ＶＨｆ，ＶＨｆ，…が設けられる。いずれもビア導体ＶＨｆもマニホールドＭＦｆ１５，ＭＦｆ２５，ＭＦａ１５およびＭＦａ２５を回避する位置に設けられ、その一方端および他方端はそれぞれセパレータＳＰ５の上面および下面に露出する。 A plurality of via conductors VHf, VHf,... Are provided in the separator SP5 forming the anode side conductor layer 125. In any case, the via conductor VHf is provided at a position that avoids the manifolds MFf15, MFf25, MFa15, and MFa25, and one end and the other end thereof are exposed on the upper surface and the lower surface of the separator SP5, respectively.
　また、図４をさらに参照して、セパレータＳＰ１の下面には、各々がＸ軸に沿って延びるようにＹ軸方向に並ぶ複数の溝（燃料極ガス流路）ＧＲｆ，ＧＲｆ，…が設けられる。溝ＧＲｆ，ＧＲｆ，…の一部はマニホールドＭＦｆ１５を跨ぎ、溝ＧＲｆ，ＧＲｆ，…の他の一部はマニホールドＭＦｆ２５を跨ぐ。ただし、いずれの溝ＧＲｆについても、一方端はＸ軸方向の正側を向くセパレータＳＰ５の側面に達し、他方端はＸ軸方向の負側を向くセパレータＳＰ５の側面に達する。したがって、溝ＧＲｆの両端は水素ガスの排出口をなす。 Referring further to FIG. 4, the lower surface of separator SP1 is provided with a plurality of grooves (fuel electrode gas flow paths) GRf, GRf,... Arranged in the Y-axis direction so that each extends along the X-axis. . A part of the grooves GRf, GRf,... Straddles the manifold MFf15, and another part of the grooves GRf, GRf,. However, in any of the grooves GRf, one end reaches the side surface of the separator SP5 facing the positive side in the X-axis direction, and the other end reaches the side surface of the separator SP5 facing the negative side in the X-axis direction. Therefore, both ends of the groove GRf form hydrogen gas discharge ports.
　電解質層１２３は、電解質ＥＬにマニホールドＭＦｆ１３，ＭＦｆ２３，ＭＦａ１３，ＭＦａ２３を形成してなる。カソード層１２２に設けられたカソードＣＴ１～ＣＴ４の上面は電解質層１２３の下面に配置され、アノード層１２４に設けられたアノードＡＮ１～ＡＮ４の下面は電解質層１２３の上面に配置される。 The electrolyte layer 123 is formed by forming manifolds MFf13, MFf23, MFa13, and MFa23 on the electrolyte EL. The upper surfaces of the cathodes CT1 to CT4 provided on the cathode layer 122 are disposed on the lower surface of the electrolyte layer 123, and the lower surfaces of the anodes AN1 to AN4 provided on the anode layer 124 are disposed on the upper surface of the electrolyte layer 123.
　つまり、セパレータＳＰ１は、カソードＣＴ１～ＣＴ４を介して電解質ＥＬと対向し、かつ複数の溝ＧＲａ，ＧＲａ，…を有する。また、セパレータＳＰ５は、アノードＡＮ１～ＡＮ４を介して電解質ＥＬと対向し、かつ複数の溝ＧＲｆ，ＧＲｆ，…を有する。 That is, the separator SP1 is opposed to the electrolyte EL via the cathodes CT1 to CT4 and has a plurality of grooves GRa, GRa,. Further, the separator SP5 faces the electrolyte EL through the anodes AN1 to AN4, and has a plurality of grooves GRf, GRf,.
　マニホールドＭＦａ１およびＭＦａ２を流れた酸素ガスは、溝ＧＲａ，ＧＲａ，…を経て燃料電池スタック１２の外部に排出される。また、マニホールドＭＦｆ１およびＭＦｆ２を流れた水素ガスは、溝ＧＲｆ，ＧＲｆ，…を経て燃料電池スタック１２の外部に排出される。 The oxygen gas that has flowed through the manifolds MFa1 and MFa2 is discharged to the outside of the fuel cell stack 12 through the grooves GRa, GRa,. Further, the hydrogen gas flowing through the manifolds MFf1 and MFf2 is discharged to the outside of the fuel cell stack 12 through the grooves GRf, GRf,.
　酸素ガスは、マニホールドＭＦａ１２，ＭＦａ２２および溝ＧＲａ，ＧＲａ，…を流れるときに、カソードＣＴ１～ＣＴ４と接触する。また、水素ガスは、マニホールドＭＦｆ１４，ＭＦｆ２４および溝ＧＲｆ，ＧＲｆ，…を流れるときに、アノードＡＮ１～ＡＮ４と接触する。酸素ガスおよび水素ガスには化学式１および２に従う化学反応が生じ、この結果、プラス電圧およびマイナス電圧が電解質ＥＬの両面に現れる。
［化１］
１／２Ｏ２＋２ｅ－→Ｏ２－
［化２］
Ｈ２＋Ｏ２－→Ｈ２Ｏ＋２ｅ－ When the oxygen gas flows through the manifolds MFa12, MFa22 and the grooves GRa, GRa,..., The oxygen gas contacts the cathodes CT1 to CT4. Further, when hydrogen gas flows through the manifolds MFf14, MFf24 and the grooves GRf, GRf,..., The hydrogen gas contacts the anodes AN1 to AN4. Oxygen gas and hydrogen gas undergo a chemical reaction according to Chemical Formulas 1 and 2, and as a result, a positive voltage and a negative voltage appear on both sides of the electrolyte EL.
[Chemical 1]
1 / 2O 2 + 2e − → O 2−
[Chemical formula 2]
H 2 + O 2− → H 2 O + 2e −
　溝ＧＲｆ，ＧＲｆ，…を流れた水素ガスの一部は、化学反応を起こすことなく、燃料電池セル１２ｃｌの外部に排出される。排出された水素ガスは、燃料電池スタック１２の外部の酸素と反応して燃焼する。これによって熱自立が図られる。 A part of the hydrogen gas flowing through the grooves GRf, GRf,... Is discharged outside the fuel cell 12cl without causing a chemical reaction. The discharged hydrogen gas reacts with oxygen outside the fuel cell stack 12 and burns. As a result, thermal independence is achieved.
　なお、セパレータＳＰ１～ＳＰ２およびＳＰ４～ＳＰ５としてはいずれも、ＹＳＺ（イットリア安定化ジルコニア），ＳｃＳＺ（スカンジア安定化ジルコニア），ＬａＧａＯ３（ランタンガレート），またはＧＤＣ（ガドリニウムドープセリア）を材料とする。また、電解質ＥＬは、９２ＺｒＯ２－８Ｙ２Ｏ３，９０ＺｒＯ２－１０Ｙ２Ｏ３，９７ＺｒＯ２－３Ｙ２Ｏ３，または８９ＺｒＯ２－１０Ｓｃ２Ｏ３－１ＣｅＯ２などが挙げられる。 The separators SP1 to SP2 and SP4 to SP5 are made of YSZ (yttria stabilized zirconia), ScSZ (scandia stabilized zirconia), LaGaO 3 (lanthanum gallate), or GDC (gadolinium doped ceria). Examples of the electrolyte EL include 92ZrO 2 -8Y 2 O 3 , 90ZrO 2 -10Y 2 O 3 , 97ZrO 2 -3Y 2 O 3 , and 89ZrO 2 -10Sc 2 O 3 -1CeO 2 .
　さらに、ビア導体ＶＨａおよびＶＨｆとしてはＬＳＭ（ランタンストロンチウムマンガナイト），Ａｇ－Ｐｄ合金，またはＮｉＯを材料とし、カソードＣＴ１～ＣＴ４としてはＬＳＣＦ（Ｌａ１－ｘＳｒｘＣｏ１－ｙＦｅｙＯ３－δ）を材料とし、アノードＡＮ１～ＡＮ４は１０ＳｃＳＺなどが挙げられる。 Further, the via conductors VHa and VHf are made of LSM (lanthanum strontium manganite), Ag—Pd alloy, or NiO, and the cathodes CT1 to CT4 are made of LSCF (La 1-x Sr x Co 1-y Fe y O 3 −δ ) as a material, and anodes AN1 to AN4 include 10ScSZ.
　図５を参照して、Ｘ軸方向の正側を向くカソードＣＴ１およびＣＴ２の側面は部分セパレータＳＰ２０１によって覆われ、Ｘ軸方向の負側を向くカソードＣＴ３およびＣＴ４の側面もまた部分セパレータＳＰ２０２によって覆われる。 Referring to FIG. 5, the side surfaces of cathodes CT1 and CT2 facing the positive side in the X-axis direction are covered by partial separator SP201, and the side surfaces of cathodes CT3 and CT4 facing the negative side in the X-axis direction are also covered by partial separator SP202. Is called.
　また、Ｘ軸方向の正側を向くアノードＡＮ１の側面は部分セパレータＳＰ４０３によって覆われ、Ｘ軸方向の正側を向くアノードＡＮ２の側面は部分セパレータＳＰ４０４によって覆われる。同様に、Ｘ軸方向の負側を向くアノードＡＮ３の側面は部分セパレータＳＰ４０５によって覆われ、Ｘ軸方向の負側を向くアノードＡＮ４の側面は部分セパレータＳＰ４０６によって覆われる。 Further, the side surface of the anode AN1 facing the positive side in the X-axis direction is covered with the partial separator SP403, and the side surface of the anode AN2 facing the positive side in the X-axis direction is covered with the partial separator SP404. Similarly, the side surface of the anode AN3 facing the negative side in the X-axis direction is covered with the partial separator SP405, and the side surface of the anode AN4 facing the negative side in the X-axis direction is covered with the partial separator SP406.
　ここで、部分セパレータＳＰ２０１およびＳＰ２０２の各々のＸ軸方向における長さは互いに共通し、部分セパレータＳＰ４０３～ＳＰ４０６の各々のＸ軸方向における長さもまた互いに共通する。さらに、部分セパレータＳＰ４０３～ＳＰ４０６の各々のＸ軸方向における長さは、部分セパレータＳＰ２０１およびＳＰ２０２の各々のＸ軸方向における長さよりも短い。 Here, the lengths of the partial separators SP201 and SP202 in the X-axis direction are common to each other, and the lengths of the partial separators SP403 to SP406 in the X-axis direction are also common to each other. Further, the length of each of the partial separators SP403 to SP406 in the X-axis direction is shorter than the length of each of the partial separators SP201 and SP202.
　図６を参照して、水素ガスは、マニホールドＭＦｆ１１～ＭＦｆ１５および溝ＧＲｆを流れて、燃料電池セル１２ｃｌの外部に排出される。燃料電池セル１２ｃｌをＸ軸方向から眺めると、部分セパレータＳＰ４０３は溝ＧＲｆの排出口とアノードＡＮ１との間に設けられ、部分セパレータＳＰ４０４は溝ＧＲｆの排出口とアノードＡＮ２との間に設けられ、部分セパレータＳＰ４０５は溝ＧＲｆの排出口とアノードＡＮ３との間に設けられ、そして部分セパレータＳＰ４０６は溝ＧＲｆの排出口とアノードＡＮ４との間に設けられる。 Referring to FIG. 6, hydrogen gas flows through manifolds MFf11 to MFf15 and groove GRf, and is discharged to the outside of fuel cell 12cl. When the fuel cell 12cl is viewed from the X-axis direction, the partial separator SP403 is provided between the discharge port of the groove GRf and the anode AN1, and the partial separator SP404 is provided between the discharge port of the groove GRf and the anode AN2. The partial separator SP405 is provided between the discharge port of the groove GRf and the anode AN3, and the partial separator SP406 is provided between the discharge port of the groove GRf and the anode AN4.
　部分セパレータＳＰ４０３～ＳＰ４０６をこのように設けることで、アノードＡＮ１～ＡＮ４を構成する金属ニッケルが外気によって酸化される現象、ひいては酸化物イオンがアノードＡＮ１～ＡＮ４内で固相拡散する現象が抑制される。この結果、酸化ニッケルを還元するための無駄な燃料消費によるＯＣＶの低下や、酸化・還元の繰り返しによるアノードＡＮ１～ＡＮ４の損傷を極力回避することができる。このことは、発電効率の低下の抑制に繋がる。 By providing the partial separators SP403 to SP406 in this way, the phenomenon that the metallic nickel constituting the anodes AN1 to AN4 is oxidized by the outside air, and the phenomenon that the oxide ions are solid-phase diffused in the anodes AN1 to AN4 is suppressed. . As a result, it is possible to avoid as much as possible a decrease in OCV due to wasteful fuel consumption for reducing nickel oxide and damage to the anodes AN1 to AN4 due to repeated oxidation and reduction. This leads to suppression of a decrease in power generation efficiency.
　また、電力が発生する領域は、Ｚ軸方向から眺めてアノードＡＮ１～ＡＮ４とカソードＣＴ１～ＣＴ４とが互いに重複する領域であるところ、部分セパレータＳＰ４０３～ＳＰ４０６は、Ｚ軸方向から眺めてこの重複領域の外側に位置する。したがって、部分セパレータＳＰ４０３～ＳＰ４０６を設けることによる発電出力の低下を回避することができる。 The region where power is generated is a region where the anodes AN1 to AN4 and the cathodes CT1 to CT4 overlap each other when viewed from the Z-axis direction. The partial separators SP403 to SP406 are the overlapping regions when viewed from the Z-axis direction. Located outside of. Therefore, it is possible to avoid a decrease in power generation output due to the provision of the partial separators SP403 to SP406.
　参考までに、実験によって得られた水素ガスの流量とＯＣＶとの関係を図７に示す。図７おいて、ＯＣＶの理論値は直線Ａを描く。また、部分セパレータＳＰ４０３～ＳＰ４０６を設けることなくアノードＡＮ１～ＡＮ４の側面を外気に晒したとき、ＯＣＶは曲線Ｂを描く。部分セパレータＳＰ４０３～ＳＰ４０６を設けたとき、ＯＣＶは曲線Ｃを描く。これより、部分セパレータＳＰ４０３～ＳＰ４０６を設けた場合に、特に水素ガスの流量が小さい範囲においてＯＣＶが改善されることが理解できる。 For reference, FIG. 7 shows the relationship between the flow rate of hydrogen gas obtained by the experiment and the OCV. In FIG. 7, the theoretical value of OCV draws a straight line A. When the side surfaces of the anodes AN1 to AN4 are exposed to the outside air without providing the partial separators SP403 to SP406, the OCV draws a curve B. The OCV draws a curve C when the partial separators SP403 to SP406 are provided. From this, it can be understood that when the partial separators SP403 to SP406 are provided, the OCV is improved particularly in a range where the flow rate of the hydrogen gas is small.
　以上の説明から分かるように、カソード層１２２は電解質層１２３の下面に設けられ、アノード層１２４は電解質層１２３の上面に設けられる。また、カソード側導体層１２１はカソード層１２２の下面に設けられ、アノード側導体層１２５はアノード層１２４の上面に設けられる。カソード側導体層１２１には、カソードＣＴ１～ＣＴ４に沿って酸素ガスを流す溝ＧＲａ，ＧＲａ，…が形成され、アノード側導体層１２５には、アノードＡＮ１～ＡＮ４に沿って水素ガスを流す溝ＧＲｆ，ＧＲｆ，…が形成される。溝ＧＲｆ，ＧＲｆ，…の排出口とアノードＡＮ１～ＡＮ４との間には、部分セパレータＳＰ４０３～ＳＰ４０６が設けられる。アノードＡＮ１～ＡＮ４の酸化は、部分セパレータＳＰ４０３～ＳＰ４０６によって抑制される。 As can be seen from the above description, the cathode layer 122 is provided on the lower surface of the electrolyte layer 123, and the anode layer 124 is provided on the upper surface of the electrolyte layer 123. The cathode side conductor layer 121 is provided on the lower surface of the cathode layer 122, and the anode side conductor layer 125 is provided on the upper surface of the anode layer 124. Grooves GRa, GRa,... For flowing oxygen gas along the cathodes CT1 to CT4 are formed in the cathode side conductor layer 121, and grooves GRf for flowing hydrogen gas along the anodes AN1 to AN4 are formed in the anode side conductor layer 125. , GRf,... Are formed. Partial separators SP403 to SP406 are provided between the outlets of the grooves GRf, GRf,... And the anodes AN1 to AN4. Oxidation of the anodes AN1 to AN4 is suppressed by the partial separators SP403 to SP406.
　部分セパレータＳＰ４０３～ＳＰ４０６を設けることで、アノードＡＮ１～ＡＮ４内での酸化物イオンの固相拡散が抑制され、ひいては還元のための無駄な燃料消費によるＯＣＶの低下や、酸化・還元の繰り返しによるアノードＡＮ１～ＡＮ４の損傷が抑制される。この結果、発電効率が向上する。 By providing the partial separators SP403 to SP406, solid phase diffusion of oxide ions in the anodes AN1 to AN4 is suppressed. As a result, the OCV is reduced due to wasteful fuel consumption for reduction, and the anode is caused by repeated oxidation and reduction. Damage to AN1 to AN4 is suppressed. As a result, the power generation efficiency is improved.
　なお、この実施例では、カソード側導体層１２１の上面に溝ＧＲａ，ＧＲａ，…を形成し、アノード側導体層１２５の下面に溝ＧＲｆ，ＧＲｆ，…を形成するようにしている。しかし、積層方向に並ぶ２つの燃料電池セル１２ｃｌに注目すると、下側の燃料電池セル１２ｃｌのアノード側導体層１２５が上側の燃料電池セル１２ｃｌのカソード側導体層１２１と隣接する。したがって、このように隣接する２つの導体層については、一方の導体層を省き、他方の導体層の上面および下面に溝ＧＲａ，ＧＲａ，…および溝ＧＲｆ，ＧＲｆ，…をそれぞれ形成するようにしてもよい。 In this embodiment, the grooves GRa, GRa,... Are formed on the upper surface of the cathode side conductor layer 121, and the grooves GRf, GRf,. However, when attention is paid to the two fuel cells 12cl arranged in the stacking direction, the anode side conductor layer 125 of the lower fuel cell 12cl is adjacent to the cathode side conductor layer 121 of the upper fuel cell 12cl. Therefore, for the two adjacent conductor layers, one conductor layer is omitted, and grooves GRa, GRa,... And grooves GRf, GRf,... Are formed on the upper and lower surfaces of the other conductor layer, respectively. Also good.
　また、この実施例では、部分セパレータＳＰ４０３～ＳＰ４０６の材料はセパレータＳＰ４の材料に合わせられる。しかし、部分セパレータＳＰ４０３～ＳＰ４０６の材料は電解質ＥＬの材料と合わせるようにしてもよい。 In this embodiment, the material of the partial separators SP403 to SP406 is matched to the material of the separator SP4. However, the material of the partial separators SP403 to SP406 may be matched with the material of the electrolyte EL.
　１０　…燃料電池ユニット
　１２ｃｌ　…燃料電池セル
　ＳＰ１～ＳＰ２，ＳＰ４～ＳＰ５　…セパレータ
　ＥＬ　…電解質
　ＡＮ１～ＡＮ４　…アノード（燃料極）
　ＣＴ１～ＣＴ４　…カソード（空気極）
　ＧＲｆ　…溝（燃料極ガス流路）
　ＧＲａ　…溝（空気極ガス流路）
　ＳＰ４０３～ＳＰ４０６　…部分セパレータ（酸化抑制部） 10 ... Fuel cell unit 12cl ... Fuel cell SP1-SP2, SP4-SP5 ... Separator EL ... Electrolyte AN1-AN4 ... Anode (fuel electrode)
CT1 to CT4 ... Cathode (air electrode)
GRf ... groove (fuel electrode gas flow path)
GRa ... groove (air electrode gas flow path)
SP403 to SP406 ... Partial separator (oxidation suppressing part)

Claims (5)

  1. 　板状に形成された電解質、
    　前記電解質の一方主面側に設けられた燃料極、
    　前記電解質の他方主面側に設けられた空気極、および
    　前記燃料極に沿って燃料極ガスを流す燃料極ガス流路と前記空気極に沿って空気極ガスを流す空気極ガス流路とを有するセパレータを備える燃料電池ユニットであって、
    　酸化抑制部が前記燃料極ガス流路の排出口と前記燃料極との間に設けられている、燃料電池ユニット。     An electrolyte formed in a plate shape,
    A fuel electrode provided on one main surface side of the electrolyte;
    An air electrode provided on the other main surface side of the electrolyte, a fuel electrode gas flow path for flowing fuel electrode gas along the fuel electrode, and an air electrode gas flow path for flowing air electrode gas along the air electrode. A fuel cell unit comprising a separator having
    A fuel cell unit, wherein an oxidation suppression unit is provided between an outlet of the fuel electrode gas flow path and the fuel electrode.
  2. 　前記酸化抑制部の材料は前記電解質の材料と同じである、請求項１記載の燃料電池ユニット。 2. The fuel cell unit according to claim 1, wherein the material of the oxidation suppressing part is the same as the material of the electrolyte.
  3. 　前記酸化抑制部の材料は前記セパレータの材料と同じである、請求項１記載の燃料電池ユニット。 The fuel cell unit according to claim 1, wherein a material of the oxidation suppressing part is the same as a material of the separator.
  4. 　前記電解質の主面に直交する方向から眺めたとき前記酸化抑制部は前記燃料極および前記空気極が重複する領域の外側に位置する、請求項１ないし３のいずれかに記載の燃料電池ユニット。 4. The fuel cell unit according to claim 1, wherein when viewed from a direction perpendicular to the main surface of the electrolyte, the oxidation suppression unit is located outside a region where the fuel electrode and the air electrode overlap. 5.
  5. 　前記セパレータは、前記燃料極を介して前記電解質と対向しかつ前記燃料極ガス流路を有する第１部分セパレータ、および前記空気極を介して前記電解質と対向しかつ前記空気極ガス流路を有する第２部分セパレータを含む、請求項１ないし４のいずれかに記載の燃料電池ユニット。 The separator is opposed to the electrolyte via the fuel electrode and has the fuel electrode gas flow path, and the separator is opposed to the electrolyte via the air electrode and has the air electrode gas flow path. The fuel cell unit according to any one of claims 1 to 4, comprising a second partial separator.
PCT/JP2015/051298 2014-06-06 2015-01-20 Fuel cell unit WO2015186370A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012160367A (en) * 2011-02-01 2012-08-23 Denso Corp Fuel cell stack, and fuel cell system
WO2012133175A1 (en) * 2011-03-25 2012-10-04 株式会社村田製作所 Fuel cell

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012160367A (en) * 2011-02-01 2012-08-23 Denso Corp Fuel cell stack, and fuel cell system
WO2012133175A1 (en) * 2011-03-25 2012-10-04 株式会社村田製作所 Fuel cell

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