JP5532521B2 - Solid oxide fuel cell assembly - Google Patents

Solid oxide fuel cell assembly Download PDF

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JP5532521B2
JP5532521B2 JP2010222105A JP2010222105A JP5532521B2 JP 5532521 B2 JP5532521 B2 JP 5532521B2 JP 2010222105 A JP2010222105 A JP 2010222105A JP 2010222105 A JP2010222105 A JP 2010222105A JP 5532521 B2 JP5532521 B2 JP 5532521B2
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fuel cell
solid oxide
oxide fuel
current collector
layer
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めぐみ 島津
晃 川上
修一郎 西願
真登 太田
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Toto Ltd
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    • 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
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Description

本発明は、固体酸化物型燃料電池セル集合体に関する。   The present invention relates to a solid oxide fuel cell assembly.

固体酸化物型燃料電池（Solid Oxide Fuel Cell：以下「ＳＯＦＣ」とも言う）は、電解質として酸化物イオン導電性固体電解質を用い、その両側に電極を取り付け、一方の側に燃料ガスを供給し、他方の側に空気を供給して、比較的高温で発電反応を生じさせて発電を行う燃料電池である。   A solid oxide fuel cell (hereinafter also referred to as “SOFC”) uses an oxide ion conductive solid electrolyte as an electrolyte, attaches electrodes on both sides thereof, and supplies fuel gas on one side, This is a fuel cell that generates power by supplying air to the other side and generating a power generation reaction at a relatively high temperature.

この種の燃料電池では、単一の燃料電池セル（単セル）では、得られる電力が少ないので、特許文献１に示すように、複数の燃料電池セルを平行に並べて、集電体により電気的に直列に接続して必要な電力を得るようにしている。   In this type of fuel cell, since a single fuel cell (single cell) obtains less electric power, as shown in Patent Document 1, a plurality of fuel cells are arranged in parallel and electrically connected by a current collector. Are connected in series to obtain the necessary power.

特許文献１には、円筒状に形成された固体電解質の内周面に空気電極（＋極）が、また外周面には燃料電極（−極）が形成され、内周側の空気電極が端部において固体電解質から筒状に延出されている燃料電池セル（単セル）が開示されている。この特許文献１の燃料電池では、複数の燃料電池セル（単セル）をハウジング内に平行に並べ、ハウジング内部に供給する燃料ガスが外部に漏れないように、ハウジングの開放された部分をガスで気密にシールしている。各単セルの外周面には集電体が取り付けられ、この集電体の端部が、一方の空気電極側でガラスから気密に延出して、接続用集電部材を介して隣接する単セルの空気電極に接続されている。特許文献１の燃料電池では、このようにして複数の単セルを直列に接続してスタック化して固体電解質型燃料電池を構成している。   In Patent Document 1, an air electrode (+ electrode) is formed on the inner peripheral surface of a solid electrolyte formed in a cylindrical shape, and a fuel electrode (-electrode) is formed on the outer peripheral surface. A fuel battery cell (single cell) is disclosed which extends in a cylindrical shape from a solid electrolyte in the part. In the fuel cell of Patent Document 1, a plurality of fuel cells (single cells) are arranged in parallel in the housing, and the opened portion of the housing is made of gas so that fuel gas supplied into the housing does not leak to the outside. It is airtightly sealed. A current collector is attached to the outer peripheral surface of each single cell, and the end of this current collector extends airtightly from the glass on one air electrode side and is adjacent to each other via a current collecting member for connection. Connected to the air electrode. In the fuel cell of Patent Document 1, a plurality of single cells are connected in series and stacked to form a solid oxide fuel cell.

このような構造の集電体に、導電性を向上させるために銀メッキを施すことがある。この場合、銀メッキに沿って、すなわち銀メッキの膜厚断面方向に対して電流が流れる。   The current collector having such a structure may be subjected to silver plating in order to improve conductivity. In this case, a current flows along the silver plating, that is, the film thickness cross-sectional direction of the silver plating.

特許文献２には、燃料電池セル（単セル）と集電体を積層させることによって、複数の単セルを接続してスタック化し固体電解質型燃料電池を構成する際に用いる集電体が開示されている。耐熱合金材料からなる集電体の表面に、Ｃｒ２Ｏ３−ｘからなる組成のクロム酸化物層を介して銀メッキ層が形成されている集電体を用いることにより、燃料電池の運転温度における耐熱性と導電性を実現することができる。
なおここで、耐熱合金材料の表面にNiメッキ層を形成し、このNiメッキ層の上に銀メッキ層を形成することにより、銀メッキ層と耐熱合金材料の密着性を向上させる効果も得ることができることは知られている。 Patent Document 2 discloses a current collector that is used when a plurality of single cells are connected and stacked to form a solid oxide fuel cell by stacking a fuel cell (single cell) and a current collector. ing. By using a current collector in which a silver plating layer is formed on the surface of a current collector made of a heat-resistant alloy material via a chromium oxide layer having a composition made of Cr 2 O 3-x , the operating temperature of the fuel cell It is possible to achieve heat resistance and electrical conductivity.
Here, by forming a Ni plating layer on the surface of the heat resistant alloy material and forming a silver plating layer on the Ni plating layer, an effect of improving the adhesion between the silver plating layer and the heat resistant alloy material can be obtained. It is known that you can.

特開平９−２７４９２７号公報Japanese Patent Laid-Open No. 9-274927 特開２００６−１０７９３６号公報JP 2006-107936 A

本発明者らが実験を行った。具体的には固体酸化物型燃料電池セル間に配置され、集電体の表層に銀が配置され、配置されている銀に沿って電流が流れるように構成される集電体を用いて、集電体の基材と銀の間に従来から知られるNiを配置させ発電運転を行った。そうしたところ表層の銀が剥離される事象が起こることを初めて発見した。
これはこれまでNiで銀の剥離問題が解消されていたのに対して、新たな課題を生じたために起こった不具合である。
鋭意研究したところ、次のような課題があることを初めて見出した。
1つ目は集電体の中での電流の流れ方に起因する。すなわち、表層の銀に沿って電流が流れるため、表層のみにある銀だけでは電流の通路断面積が小さく電気抵抗が大きいため、発熱量が大幅にアップし大幅に体積膨張の変化率がアップしたたことによると思われる。
さらに2つ目は、集電体の銀の部分が特許文献２にあるように燃料電池セルと接していないため固体酸化物型燃料電池の運転中に直接高温の空気にさらされる面積が大きく、基材と銀の間に配置されるNiが酸化したためだと思われる。酸化すると体積膨張が起こり、より銀がはがれやすい状態となったと思われる。
そこで今回、固体酸化物型燃料電池セル間に配置され、集電体の表層に銀が配置され、配置されている銀に沿って電流が流れるように構成される集電体であり、集電体の表層が固体酸化物型燃料電池セルに挟まれず空気又は酸化剤ガスにさらされている集電体を備えた固体酸化物型燃料電池集合体における集電体の銀の剥がれを防止することを目的とする。 The inventors conducted experiments. Specifically, using a current collector disposed between solid oxide fuel cells, silver disposed on the surface layer of the current collector, and configured to allow current to flow along the disposed silver, Conventionally known Ni was placed between the current collector base material and silver to perform power generation operation. As a result, we discovered for the first time that the surface silver was peeled off.
This is a problem that occurred because a new problem has arisen while the problem of silver peeling has been solved with Ni.
As a result of intensive research, we found for the first time that there were the following problems.
The first is due to the current flow in the current collector. In other words, since current flows along the surface silver, only the silver on the surface layer has a small current passage cross-sectional area and a large electrical resistance, so the amount of heat generation is greatly increased and the rate of change in volume expansion is greatly increased. It seems to be due to that.
Secondly, since the silver portion of the current collector is not in contact with the fuel cell as in Patent Document 2, the area directly exposed to high-temperature air during the operation of the solid oxide fuel cell is large. This is thought to be due to the oxidation of Ni placed between the base material and silver. When oxidized, volume expansion occurs, and it seems that silver is more easily peeled off.
Therefore, this time, the current collector is arranged between the solid oxide fuel cells, the silver is arranged on the surface layer of the current collector, and the current flows along the arranged silver. To prevent the current collector silver from peeling off in a solid oxide fuel cell assembly comprising a current collector that is exposed to air or oxidant gas without being sandwiched between solid oxide fuel cell cells With the goal.

上記課題を解決するために、本発明は、複数の固体酸化物型燃料電池セルと、
前記複数の固体酸化物型燃料電池セルを電気的に接続する集電体と、を有し、
前記集電体は表層に銀の層が配置されるとともに、
前記銀の層に沿って電流が流れるように構成され、
さらに前記銀の層に前記固体酸化物型燃料電池セルの発電のために用いられる空気または酸化剤ガスが触れるように構成される集電体である固体酸化物型燃料電池セル集合体において、
前記固体酸化物型燃料電池セル集合体の運転温度が６００度から８００度の際に、
前記集電体の基材と、
前記銀の層と、
の間に
金を有する酸化抑制層を備えることを特徴としている。
このように構成された本発明においては、基材に設けられた銀メッキ層が剥がれることがなく、燃料電池セルの信頼性を向上させることができる。
In order to solve the above problems, the present invention provides a plurality of solid oxide fuel cells,
A current collector for electrically connecting the plurality of solid oxide fuel cells,
The current collector has a silver layer disposed on the surface layer,
Configured to allow current to flow along the silver layer;
Furthermore, in the solid oxide fuel cell assembly which is a current collector configured to come into contact with the silver layer air or oxidant gas used for power generation of the solid oxide fuel cell,
When the operating temperature of the solid oxide fuel cell assembly is 600 degrees to 800 degrees,
A substrate of the current collector;
The silver layer;
Between
Further comprising an oxidation inhibiting layer having gold is a feature.
In this invention comprised in this way, the silver plating layer provided in the base material does not peel off, but the reliability of a fuel cell can be improved.

本発明によれば、固体酸化物型燃料電池セル間に配置され、集電体の表層に銀が配置され、配置されている銀に沿って電流が流れるように構成される集電体であり、集電体の表層が固体酸化物型燃料電池セルに挟まれず空気又は酸化剤ガスにさらされている集電体を備えた固体酸化物型燃料電池集合体における集電体の銀の剥がれを防止することにより、燃料電池セルの信頼性を向上させることができる。   According to the present invention, the current collector is disposed between the solid oxide fuel cells, the silver is disposed on the surface layer of the current collector, and the current is configured to flow along the disposed silver. In the solid oxide fuel cell assembly including the current collector, the surface layer of the current collector is not sandwiched between the solid oxide fuel cell cells and is exposed to air or an oxidant gas. By preventing this, the reliability of the fuel cell can be improved.

本発明の実施形態による固体酸化物型燃料電池セル集合体を示す斜視図である。1 is a perspective view showing a solid oxide fuel cell assembly according to an embodiment of the present invention. 本発明の実施形態による固体酸化物型燃料電池セル集合体を示す部分断面図である。1 is a partial cross-sectional view showing a solid oxide fuel cell assembly according to an embodiment of the present invention.

次に、添付図面を参照して、本発明の実施形態による固体酸化物型燃料電池セル集合体を説明する。図１は、本発明の実施形態による固体酸化物型燃料電池セル集合体を示す斜視図である。   Next, a solid oxide fuel cell assembly according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing a solid oxide fuel cell assembly according to an embodiment of the present invention.

図１に示すように、固体酸化物型燃料電池セル集合体１４は、１６本の燃料電池セルユニット１６を備え、これらの燃料電池セルユニット１６の下端側及び上端側が、それぞれ、セラミック製の下支持板６８及び上支持板１００により支持されている。これらの下支持板６８及び上支持板１００には、内側電極端子８６が貫通可能な貫通穴６８a及び１００ａがそれぞれ形成されている。   As shown in FIG. 1, the solid oxide fuel cell assembly 14 includes 16 fuel cell units 16, and a lower end side and an upper end side of each of the fuel cell units 16 are respectively made of ceramic. It is supported by the support plate 68 and the upper support plate 100. The lower support plate 68 and the upper support plate 100 are formed with through holes 68a and 100a through which the inner electrode terminal 86 can pass.

燃料電池セルユニット１６には、集電体１０２及び外部端子９９が取り付けられている。この集電体１０２は、燃料電池セルユニット１６の両端部にある内側電極端子８６と外側電極層９２を電気的に接続するためのものである。
集電体の組成は後で詳述するが、基材上に酸化抑制層である金の層を介して銀の層が表層に位置している。
銀の層は固体酸化物型燃料電池セルと接していない部分を有し、従来あったようにセルどうしで挟まれる形ではなく、セルを把持する部分を有し、セルの発電のために用いられる空気または酸化剤ガスにさらされる部分を有している。 A current collector 102 and an external terminal 99 are attached to the fuel cell unit 16. The current collector 102 is for electrically connecting the inner electrode terminal 86 and the outer electrode layer 92 at both ends of the fuel cell unit 16.
Although the composition of the current collector will be described in detail later, a silver layer is positioned on the surface of the base material via a gold layer that is an oxidation-suppressing layer.
The silver layer has a portion that is not in contact with the solid oxide fuel cell, and is not sandwiched between cells as in the past, but has a portion that grips the cell and is used for power generation of the cell Part exposed to air or oxidant gas.

次に図２により燃料電池セルユニット１６について説明する。図２は、本発明の実施形態による固体電解質型燃料電池（ＳＯＦＣ）の燃料電池セルユニットを示す部分断面図である。
図２に示すように、燃料電池セルユニット１６は、燃料電池セル８４と、この燃料電池セル８４の上下方向端部にそれぞれ接続された内側電極端子８６とを備えている。
燃料電池セル８４は、上下方向に延びる管状構造体であり、内部に燃料ガス流路８８を形成する円筒形の第２の電極である内側電極層９０と、円筒形の第１の電極である外側電極層９２と、第２の電極である内側電極層９０と第１の電極である外側電極層９２との間にある電解層９４とを備えている。この内側電極層９０は、燃料ガスが通過する燃料極であり、（−）極となり、一方、外側電極層９２は、空気と接触する空気極であり、（＋）極となっている。 Next, the fuel cell unit 16 will be described with reference to FIG. FIG. 2 is a partial cross-sectional view showing a fuel cell unit of a solid oxide fuel cell (SOFC) according to an embodiment of the present invention.
As shown in FIG. 2, the fuel cell unit 16 includes a fuel cell 84 and inner electrode terminals 86 respectively connected to the vertical ends of the fuel cell 84.
The fuel battery cell 84 is a tubular structure that extends in the vertical direction, and is an inner electrode layer 90 that is a cylindrical second electrode that forms a fuel gas flow path 88 therein, and a cylindrical first electrode. The outer electrode layer 92 includes an inner electrode layer 90 as a second electrode and an electrolytic layer 94 between the outer electrode layer 92 as a first electrode. The inner electrode layer 90 is a fuel electrode through which fuel gas passes and becomes a (−) electrode, while the outer electrode layer 92 is an air electrode in contact with air and becomes a (+) electrode.

燃料電池セル１６の上端側と下端側に取り付けられた内側電極端子８６は、同一構造であるため、ここでは、上端側に取り付けられた内側電極端子８６について具体的に説明する。内側電極層９０の上部９０ａは、電解層９４と外側電極層９２に対して露出された外周面９０ｂと上端面９０ｃとを備えている。内側電極端子８６は、導電性のシール材９６を介して内側電極層９０の外周面９０ｂと接続され、さらに、内側電極層９０の上端面９０ｃとは直接接触することにより、内側電極層９０と電気的に接続されている。また、内側電極端子８６は、突出した筒状部分８６ａと平坦面８６ｂを備え、筒状部分８６ａの内部には、内側電極層９０の燃料ガス流路８８と連通する燃料ガス流路９８が形成されている。   Since the inner electrode terminal 86 attached to the upper end side and the lower end side of the fuel cell 16 has the same structure, the inner electrode terminal 86 attached to the upper end side will be specifically described here. The upper portion 90a of the inner electrode layer 90 includes an outer peripheral surface 90b and an upper end surface 90c exposed to the electrolytic layer 94 and the outer electrode layer 92. The inner electrode terminal 86 is connected to the outer peripheral surface 90b of the inner electrode layer 90 through a conductive sealing material 96, and is further in direct contact with the upper end surface 90c of the inner electrode layer 90, thereby Electrically connected. The inner electrode terminal 86 includes a protruding cylindrical portion 86a and a flat surface 86b, and a fuel gas channel 98 communicating with the fuel gas channel 88 of the inner electrode layer 90 is formed inside the cylindrical portion 86a. Has been.

内側電極層９０は、例えば、Ｎｉと、ＣａやＹ、Ｓｃ等の希土類元素から選ばれる少なくとも一種をドープしたジルコニアとの混合体、Ｎｉと、希土類元素から選ばれる少なくとも一種をドープしたセリアとの混合体、Ｎｉと、Ｓｒ、Ｍｇ、Ｃｏ、Ｆｅ、Ｃｕから選ばれる少なくとも一種をドープしたランタンガレードとの混合体、の少なくとも一種から形成される。   The inner electrode layer 90 includes, for example, a mixture of Ni and zirconia doped with at least one selected from rare earth elements such as Ca, Y, and Sc, and Ni and ceria doped with at least one selected from rare earth elements. The mixture is formed of at least one of Ni and a mixture of lanthanum garade doped with at least one selected from Sr, Mg, Co, Fe, and Cu.

電解層９４は、例えば、Ｓｒ、Ｍｇから選ばれる少なくとも一種をドープしたランタンガレートを用いることができる。   For the electrolytic layer 94, for example, lanthanum gallate doped with at least one selected from Sr and Mg can be used.

外側電極層９２は、例えば、Ｓｒ、Ｃａから選ばれた少なくとも一種をドープしたランタンマンガナイト、Ｓｒ、Ｃｏ、Ｎｉ、Ｃｕから選ばれた少なくとも一種をドープしたランタンフェライト、Ｓｒ、Ｆｅ、Ｎｉ、Ｃｕから選ばれた少なくとも一種をドープしたランタンコバルタイト、銀、などの少なくとも一種から形成される。   The outer electrode layer 92 includes, for example, lanthanum manganite doped with at least one selected from Sr and Ca, lanthanum ferrite doped with at least one selected from Sr, Co, Ni and Cu, Sr, Fe, Ni and Cu. It is formed from at least one of lanthanum cobaltite doped with at least one selected from the group consisting of silver and silver.

電解層９４に、例えばＳｒ、Ｍｇから選ばれる少なくとも一種をドープしたランタンガレートを用いることにより、固体電解質型燃料電池を８００℃以下で作動させることができる。その結果、銀の揮発を抑制することが可能となり、電子導電性の高い銀を集電体に用いることができる。   By using, for example, lanthanum gallate doped with at least one selected from Sr and Mg for the electrolytic layer 94, the solid oxide fuel cell can be operated at 800 ° C. or lower. As a result, silver volatilization can be suppressed, and silver having high electronic conductivity can be used for the current collector.

次に、本発明を実施例を基に詳細に説明するが、本発明が以下の実施例に限定されないことはもちろんである。   Next, the present invention will be described in detail based on examples, but it is needless to say that the present invention is not limited to the following examples.

（実施例：集電体の作製）
厚さ０．３ｍｍの耐熱合金製の基材に０．５μｍの金メッキ層を形成し、その金メッキ層の上に２５μｍの銀メッキ層を形成し、集電体を作製し固体酸化物型燃料電池と組み合わせ固体酸化物型燃料電池セル集合体を作成した。なお、ここで金は６００度から８００度において、酸素ガス１モルあたりの酸化物の標準生成ギブズエネルギーがNiよりも大きく、Niに比べ酸化しにくい金属である。

耐熱合金の組成は以下の通りである。Ｃｒ＝１８．３（重量％、以下同じ）、Ａｌ＝３．１、Ｓｉ＝０．３、Ｍｎ＝０．２、Ｎｉ＝０．１、Ｔｉ＝０．１、Ｆｅ＝バランスからなる合金。 (Example: Preparation of current collector)
A 0.5 μm gold plating layer is formed on a heat-resistant alloy substrate having a thickness of 0.3 mm, a 25 μm silver plating layer is formed on the gold plating layer, and a current collector is produced to produce a solid oxide fuel cell A solid oxide fuel cell assembly was prepared in combination with the above. Here, gold is a metal that has a standard Gibbs energy of oxide generation per mole of oxygen gas greater than that of Ni at 600 to 800 degrees and is less susceptible to oxidation than Ni.

The composition of the heat-resistant alloy is as follows. An alloy composed of Cr = 18.3 (% by weight, the same applies hereinafter), Al = 3.1, Si = 0.3, Mn = 0.2, Ni = 0.1, Ti = 0.1, and Fe = balance.

（比較例：集電体の作製）
厚さ０．３ｍｍの耐熱合金製の基材に０．５μｍのニッケルメッキ層を形成し、そのニッケルメッキ層の上に２５μｍの銀メッキ層を形成し、集電体を作製し、実施例同様に固体酸化物型燃料電池セル集合体を作成した。耐熱合金の組成は以下の通りである。Ｃｒ＝１８．３（重量％、以下同じ）、Ａｌ＝３．１、Ｓｉ＝０．３、Ｍｎ＝０．２、Ｎｉ＝０．１、Ｔｉ＝０．１、Ｆｅ＝バランスからなる合金。 (Comparative example: Preparation of current collector)
A nickel plating layer of 0.5 μm is formed on a base made of a heat-resistant alloy having a thickness of 0.3 mm, a silver plating layer of 25 μm is formed on the nickel plating layer, and a current collector is produced. A solid oxide fuel cell assembly was prepared. The composition of the heat-resistant alloy is as follows. An alloy composed of Cr = 18.3 (% by weight, the same applies hereinafter), Al = 3.1, Si = 0.3, Mn = 0.2, Ni = 0.1, Ti = 0.1, and Fe = balance.

（密着性評価１）
以上のようにして作製した実施例及び、比較例の固体酸化物型燃料電池セル集合体の各集電体を大気雰囲気、８５０℃で１時間熱処理した。加速試験のため熱処理後、各集電体を９０度に折り曲げて、銀メッキの剥がれを確認した。実施例は剥がれが認められなかった。比較例では銀メッキの剥がれが見られた。 (Adhesion evaluation 1)
The current collectors of the solid oxide fuel cell assemblies of Examples and Comparative Examples produced as described above were heat-treated at 850 ° C. for 1 hour in an air atmosphere. After the heat treatment for the acceleration test, each current collector was bent at 90 degrees to confirm peeling of the silver plating. In the examples, no peeling was observed. In the comparative example, peeling of the silver plating was observed.

（密着性評価２）
以上のようにして作製した実施例の固体酸化物型燃料電池セル集合体を、７００℃、電流７Aの条件で８８００時間発電試験を行った。発電試験中は、燃料電池セルの外側には空気を、内側には水素と窒素の混合ガスを流したため、集電体は空気にさらされていた。発電試験後の集電体を目視で確認したところ、銀メッキの剥がれは認められなかった。 (Adhesion evaluation 2)
The power generation test of the solid oxide fuel cell assembly of the example produced as described above was conducted for 8800 hours under the conditions of 700 ° C. and current 7A. During the power generation test, air was exposed to the outside of the fuel cell, and a mixed gas of hydrogen and nitrogen was allowed to flow inside, so that the current collector was exposed to air. When the current collector after the power generation test was visually confirmed, no peeling of the silver plating was observed.

１４ 固体酸化物型燃料電池セル集合体
１６ 燃料電池セルユニット
６８ 上支持板
６８ａ 上支持板貫通穴
８４ 燃料電池セル
８６ 内側電極端子
８６ａ 内側電極端子の筒状部分
８６ｂ 内側電極端子の平坦面
８８ 内側電極層の燃料ガス流路
９０ 内側電極層
９０ａ 内側電極層の上部
９０ｂ 外周面
９２ 外側電極層
９４ 電解層
９６ 導電性のシール材
９８ 燃料ガス流路
９９ 外部端子
１００ 下支持板
１００ａ 下支持板貫通穴
１０２ 集電体
DESCRIPTION OF SYMBOLS 14 Solid oxide type fuel cell assembly 16 Fuel cell unit 68 Upper support plate 68a Upper support plate through-hole 84 Fuel cell 86 Inner electrode terminal 86a Tubular portion of inner electrode terminal 86b Flat surface of inner electrode terminal 88 Inner side Fuel gas flow path of electrode layer 90 Inner electrode layer 90a Upper part of inner electrode layer 90b Outer peripheral surface 92 Outer electrode layer 94 Electrolytic layer 96 Conductive seal material 98 Fuel gas flow path 99 External terminal 100 Lower support plate 100a Lower support plate penetration Hole 102 current collector

Claims (2)

複数の固体酸化物型燃料電池セルと、
前記複数の固体酸化物型燃料電池セルを電気的に接続する集電体と、を有し、
前記集電体は表層に銀の層が配置されるとともに、
前記銀の層に沿って電流が流れるように構成され、
さらに前記銀の層に前記固体酸化物型燃料電池セルの発電のために用いられる空気または酸化剤ガスが触れるように構成される集電体である固体酸化物型燃料電池セル集合体において、
前記固体酸化物型燃料電池セル集合体の運転温度が６００度から８００度の際に、
前記集電体の基材と、
前記銀の層と、の間に
金を有する酸化抑制層を備えることを特徴とする固体酸化物型燃料電池セル集合体。 A plurality of solid oxide fuel cells;
A current collector for electrically connecting the plurality of solid oxide fuel cells,
The current collector has a silver layer disposed on the surface layer,
Configured to allow current to flow along the silver layer;
Furthermore, in the solid oxide fuel cell assembly which is a current collector configured to come into contact with air or oxidant gas used for power generation of the solid oxide fuel cell in contact with the silver layer,
When the operating temperature of the solid oxide fuel cell assembly is 600 degrees to 800 degrees,
A substrate of the current collector;
Between the silver layer
A solid oxide fuel cell assembly comprising an oxidation suppression layer having gold . 前記金を有する酸化抑制層が、金メッキ層であることを特徴とする請求項１に記載の固体酸化物形燃料電池セル集合体。2. The solid oxide fuel cell assembly according to claim 1, wherein the oxidation suppressing layer containing gold is a gold plating layer. 3.
JP2010222105A 2010-09-30 2010-09-30 Solid oxide fuel cell assembly Expired - Fee Related JP5532521B2 (en)

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