JPH0594828A - Solid electrolyte type fuel cell - Google Patents

Solid electrolyte type fuel cell

Info

Publication number
JPH0594828A
JPH0594828A JP3256799A JP25679991A JPH0594828A JP H0594828 A JPH0594828 A JP H0594828A JP 3256799 A JP3256799 A JP 3256799A JP 25679991 A JP25679991 A JP 25679991A JP H0594828 A JPH0594828 A JP H0594828A
Authority
JP
Japan
Prior art keywords
base plate
interconnector
solid electrolyte
fuel cell
conductive material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3256799A
Other languages
Japanese (ja)
Other versions
JP3151872B2 (en
Inventor
Kunio Nishida
邦雄 西田
Hiroshi Takagi
洋 鷹木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP25679991A priority Critical patent/JP3151872B2/en
Publication of JPH0594828A publication Critical patent/JPH0594828A/en
Application granted granted Critical
Publication of JP3151872B2 publication Critical patent/JP3151872B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/10Fuel cells with solid electrolytes
    • H01M8/12Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M8/1231Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte with both reactants being gaseous or vaporised
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells

Abstract

PURPOSE:To obtain a solid electrolyte type fuel cell which can co-sintered by using an interconnector including no lanthanum chromite. CONSTITUTION:Penetration holes 21a are provided to a base plate 21 which consists of a material mainly of zirconia to be a solid electrolyte. A nonion conductive material layer 22 (La2Mn2O layer and the like, for example) is provided on the surface of the base plate 21. Then, an interconnector 12 applied on the front side and the rear side of the base plate 21 so as to fill conductors 24a and 24b in the penetration holes 21a presents a shrinkage factor almost equal to different parts (a solid electrolyte, a distributer, and the like, for example) in the sintering, and it can be co-sintered together with these parts without generating a warpage, a separation, and the like. And the electric continuety of the front side and the rear side of the interconnector 12 is made through the conductors 24a and 24b filled in the penetration holes 21a. And a reverse electromotive force generated between the front side and the rear side of the interconnector 12 is prevented by the nonion conductive material layer 22.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、固体電解質型燃料電池
に関する。
FIELD OF THE INVENTION The present invention relates to a solid oxide fuel cell.

【0002】[0002]

【従来の技術と課題】固体電解質型燃料電池の一種類と
して平板タイプのものが知られている。このタイプの燃
料電池は、燃料極及び空気極を表裏面に設けた固体電解
質と、燃料極及び空気極に燃料ガス及び空気(酸素)を
均等に供給すると共に電極に発生した電荷の経路となる
ディストリビュータと、インターコネクタとで構成され
た積層体構造を有している。そして、この平板タイプの
燃料電池の製造方法として、電池を構成するそれぞれの
部分をグリーンシート状にして組み立てた後、共焼結
(同時に焼成すること)する方法がある。この製造方法
によって得られる電池は、使用するガス(燃料ガス、空
気)に対する気密性や稼働時の昇降温に対する信頼性・
耐久性に優れている。
2. Description of the Related Art A flat plate type fuel cell is known as one type of solid oxide fuel cell. This type of fuel cell supplies a solid electrolyte having a fuel electrode and an air electrode on the front and back surfaces, a fuel gas and air (oxygen) to the fuel electrode and the air electrode evenly, and serves as a path for electric charges generated at the electrodes. It has a laminated structure composed of a distributor and an interconnector. Then, as a method of manufacturing this flat plate type fuel cell, there is a method of co-sintering (simultaneous firing) after assembling each part constituting the cell into a green sheet shape. Batteries obtained by this manufacturing method are airtight to the gas used (fuel gas, air) and reliable against temperature rise and fall during operation.
It has excellent durability.

【0003】ところで、インターコネクタは高温におい
て充分な電導率を有し、かつ、酸化・還元雰囲気に対し
て安定でなければならない。このため、インターコネク
タの材料としては、通常、ランタンクロマイトを主成分
とする材料が用いられる。しかし、焼成時において、ラ
ンタンクロマイトの収縮率は燃料電池を構成している別
部品(例えば、固体電解質等)の収縮率と大きく異なる
ため、別部品との共焼結が難しかった。
By the way, the interconnector must have a sufficient electric conductivity at a high temperature and be stable in an oxidizing / reducing atmosphere. Therefore, as a material for the interconnector, a material containing lanthanum chromite as a main component is usually used. However, at the time of firing, the shrinkage rate of the lanthanum chromite is significantly different from the shrinkage rate of another component (for example, a solid electrolyte) forming the fuel cell, and thus co-sintering with another component was difficult.

【0004】そこで、本発明の課題は、ランタンクロマ
イトを含まないインターコネクタを使用することによ
り、共焼結が可能な固体電解質型燃料電池を提供するこ
とにある。
Therefore, an object of the present invention is to provide a solid oxide fuel cell capable of co-sintering by using an interconnector containing no lanthanum chromite.

【0005】[0005]

【課題を解決するための手段と作用】以上の課題を解決
するため、本発明に係る固体電解質型燃料電池は、イン
ターコネクタが、固体電解質を主成分とする材料からな
る貫通穴を設けたベース板と、前記ベース板の表面又は
内部に設けた非イオン導電性材料層と、前記非イオン導
電性材料層を設けたベース板の表裏面に被覆され、か
つ、前記貫通穴に充填された導電体とで構成されている
ことを特徴とする。
In order to solve the above problems, in a solid oxide fuel cell according to the present invention, an interconnector is a base provided with a through hole made of a material containing a solid electrolyte as a main component. A plate, a nonionic conductive material layer provided on the surface or inside of the base plate, and a conductive material coated on the front and back surfaces of the base plate provided with the nonionic conductive material layer and filled in the through hole. It is characterized by being composed of the body.

【0006】以上の構成において、インターコネクタの
主たる構成部分であるベース板が固体電解質であるた
め、インターコネクタは別部品(例えば、固体電解質や
ディストリビュータ等)と略等しい収縮率を呈し、これ
らの別部品と剥がれやそり等を発生させることなく共焼
結される。そして、固体電解質を主成分とする材料から
なるベース板は絶縁体であるため、インターコネクタの
表裏の電気的導通は、ベース板の表裏面に被覆され、か
つ、貫通穴に充填された導電体を介して行われる。さら
に、ベース板はイオン導電体であるため、ベース板の表
裏間に逆起電力が発生し、燃料電池の性能を低下させる
心配がある。そこで、ベース板の表裏又は内部に非イオ
ン導電性材料層を設けた。これによりベース板のイオン
導電性が阻止され、インターコネクタの表裏間に逆起電
力が発生しなくなる。
In the above structure, since the base plate, which is the main constituent part of the interconnector, is a solid electrolyte, the interconnector exhibits a contraction rate substantially equal to that of another component (eg, solid electrolyte or distributor), and these different components are separated from each other. It is co-sintered with the parts without peeling or warping. Since the base plate made of a material having a solid electrolyte as a main component is an insulator, the electrical continuity of the front and back of the interconnector is covered by the front and back of the base plate, and the conductor filled in the through hole. Done through. Furthermore, since the base plate is an ionic conductor, a counter electromotive force is generated between the front and back of the base plate, which may deteriorate the performance of the fuel cell. Therefore, a nonionic conductive material layer is provided on the front and back sides or inside the base plate. As a result, the ionic conductivity of the base plate is blocked, and the counter electromotive force does not occur between the front and back surfaces of the interconnector.

【0007】そして、固体電解質を主成分とする材料に
高いイオン導電性をもつジルコニアを主成分とする材料
を用い、かつ、非イオン導電性材料にイオン導電性が低
いLa2Mn27を用いれば、発電の効率がよくなる。
Then, a material containing zirconia having high ionic conductivity as a main component is used as a material containing a solid electrolyte as a main component, and La 2 Mn 2 O 7 having a low ionic conductivity is used as a nonionic conductive material. If used, the efficiency of power generation will be improved.

【0008】 [0008]

【実施例】以下、本発明に係る固体電解質型燃料電池の
一実施例を添付図面を参照して説明する。図1は固体電
解質型燃料電池の一部を切り欠いた斜視図である。固体
電解質1は円板形状をしており、その材料としては8モ
ル%のイットリアを含むジルコニア粉末に有機バインダ
ーを加えてドクターブレード法でグリーンシート状にし
たものを用いた。燃料極2は酸化ニッケルとイットリア
安定化ジルコニア(以下、YSZという)を重量比1:
1で混合したNiOサーメットの粉末にワニスを加えて
ペースト状にしたものをスクリーン印刷等の手段にて固
体電解質1の上面に塗布して形成されている。空気極3
はランタンマンガナイトの粉末にワニスを加えてペース
ト状にしたものをスクリーン印刷等の手段にて固体電解
質1の下面に塗布して形成されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the solid oxide fuel cell according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view in which a part of the solid oxide fuel cell is cut away. The solid electrolyte 1 has a disk shape, and as a material thereof, a zirconia powder containing 8 mol% of yttria and an organic binder was added to form a green sheet by a doctor blade method. The fuel electrode 2 comprises nickel oxide and yttria-stabilized zirconia (hereinafter referred to as YSZ) in a weight ratio of 1:
It is formed by applying a varnish to the powder of NiO cermet mixed in 1 to form a paste and applying the paste to the upper surface of the solid electrolyte 1 by means of screen printing or the like. Air electrode 3
Is formed by applying a varnish to a powder of lanthanum manganite to form a paste and applying it to the lower surface of the solid electrolyte 1 by means of screen printing or the like.

【0009】ディストリビュータ5,8は燃料極2や空
気極3に均等に燃料ガスや空気がゆきわたるように、ま
たそれぞれの電極2,3と後述のインターコネクタ12
を電気的に接続するために電極材料と同じ材料を多孔質
化して形成される。すなわち、ディストリビュータ5
は、酸化ニッケルとYSZを重量比1:1で混合したN
iOサーメットの粉末にワニスを加えてペースト状にし
たものを軟質ウレタンフォームに含浸させた後、乾燥し
て成型される。同様にして、ディストリビュータ8は、
ランタンマンガナイトの粉末にワニスを加えてペースト
状にしたものを軟質ウレタンフォームに含浸させた後、
乾燥して成型される。
The distributors 5 and 8 are arranged so that the fuel gas and the air are evenly distributed to the fuel electrode 2 and the air electrode 3, respectively, and the respective electrodes 2 and 3 and the interconnector 12 which will be described later.
It is formed by making the same material as the electrode material porous in order to electrically connect the electrodes. That is, distributor 5
Is a mixture of nickel oxide and YSZ at a weight ratio of 1: 1.
A soft urethane foam is impregnated with a paste of iO cermet powder to which a varnish is added, and then dried to be molded. Similarly, the distributor 8
After impregnating a flexible urethane foam with a paste made by adding varnish to lanthanum manganite powder,
It is dried and molded.

【0010】環状の枠体6,9は、それぞれ空気や燃料
ガスを外気から遮断する機能を有している。枠体6,9
の材料としては、8モル%イットリアを含むジルコニア
粉末に有機バインダーを加えてグリーンシート状にした
ものを用いる。このグリーンシートをリング状に切り出
した後、複数枚重ねて厚みのある環状の枠体6,9にす
るべくプレス成型する。成型された枠体6,9は、それ
ぞれ燃料極2、空気極3の表面にYSZペーストにて接
着されている。この枠体6,9の内側に前記ディストリ
ビュータ5,8が挿入され、ディストリビュータ5はN
iOサーメットのペーストにて燃料極2に接着され、デ
ィストリビュータ8はランタンマンガナイトのペースト
にて空気極3に接着されている。
The annular frames 6 and 9 each have a function of blocking air and fuel gas from the outside air. Frame 6, 9
As the material of (1), a zirconia powder containing 8 mol% yttria added with an organic binder to form a green sheet is used. After cutting this green sheet into a ring shape, a plurality of sheets are stacked and press-molded to form thick annular frames 6 and 9. The molded frames 6 and 9 are adhered to the surfaces of the fuel electrode 2 and the air electrode 3 with YSZ paste. The distributors 5 and 8 are inserted inside the frames 6 and 9, and the distributor 5 is N
The paste of iO cermet is bonded to the fuel electrode 2, and the distributor 8 is bonded to the air electrode 3 with a paste of lanthanum manganite.

【0011】このようにして作製した未焼結状態の燃料
電池単セルをインターコネクタ12を間に挟んで複数個
積層し、共焼結することにより固体電解質型燃料電池積
層体となる。インターコネクタ12は、図2に示すよう
に、ベース板21と非イオン導電性材料層22と導電体
24a,24bとで構成されている。ベース板21は多
数の貫通穴21aが設けられている。ベース板21の材
料としては、YSZ粉末にバインダーを加えてドクター
ブレード法でグリーンシート状にしたものを使用した。
ベース板21の上面(即ち、空気極3側の面)には非イ
オン導電性材料層22が設けられている。非イオン導電
性材料層22には、イオン導電性が低い、例えば、La
2Mn27が採用されている。
A plurality of the unsintered fuel cell unit cells thus produced are stacked with the interconnector 12 interposed therebetween and cosintered to form a solid electrolyte fuel cell stack. As shown in FIG. 2, the interconnector 12 is composed of a base plate 21, a nonionic conductive material layer 22, and conductors 24a and 24b. The base plate 21 is provided with a large number of through holes 21a. As the material of the base plate 21, a material obtained by adding a binder to YSZ powder to form a green sheet by a doctor blade method was used.
A nonionic conductive material layer 22 is provided on the upper surface of the base plate 21 (that is, the surface on the air electrode 3 side). The nonionic conductive material layer 22 has a low ionic conductivity, such as La.
2 Mn 2 O 7 is adopted.

【0012】 さらに、導電体24a,24bがそれぞ
れベース板21の上下面に貫通穴21aを充填するよう
に設けられている。導電体24aは、酸素元素に対して
非活性な材料で、かつ、空気極3及びディストリビュー
タ8の材料と等しい材料(即ち、ペースト状のランタン
マンガナイト)をスクリーン印刷等の手段にてベース板
21の上面に塗布して形成されている。同様にして、導
電体24bは水素元素に対して非活性な材料で、かつ、
燃料極2及びディストリビュータ5の材料と等しい材料
(即ち、ペースト状のNiOサーメット)をスクリーン
印刷等の手段にてベース板21の下面(即ち、燃料極2
側の面)に塗布して形成されている。これにより、導電
体24aと24bは貫通穴21a内部で接触し、インタ
ーコネクタ12の表裏の電気的導通が確保される。
[0012] Further, conductors 24a and 24b are provided on the upper and lower surfaces of the base plate 21 so as to fill the through holes 21a. The conductor 24a is made of a material which is inactive to oxygen element and which is the same as the material of the air electrode 3 and the distributor 8 (that is, paste lanthanum manganite) by means of screen printing or the like. Is formed by coating on the upper surface of. Similarly, the conductor 24b is a material inactive to the hydrogen element, and
The same material as the material of the fuel electrode 2 and the distributor 5 (that is, paste-like NiO cermet) is formed on the lower surface of the base plate 21 (that is, the fuel electrode 2 by means of screen printing or the like).
It is formed by coating on the side surface). As a result, the conductors 24a and 24b come into contact with each other inside the through hole 21a, and electrical conduction between the front and back of the interconnector 12 is secured.

【0013】以上の構成からなる固体電解質型燃料電池
を試作し、評価した結果を表1に示す。
Table 1 shows the evaluation results of a prototype solid oxide fuel cell having the above structure.

【0014】[0014]

【表1】 [Table 1]

【0015】ここに、試作例1の燃料電池のインターコ
ネクタ12はグリーンシート状のYSZベース板21の
上面にペースト状のLaMnO3をスクリーン印刷等の
手段にて塗布した後、ベース板21に直径0.5mmの
貫通穴21aを多数個設け、さらに、ベース板21の上
下面にそれぞれペースト状のランタンマンガナイト及び
NiOサーメットを一様にかつ貫通穴21aを充填する
ように塗布して作製したものである。焼成時に、ペース
ト状のLaMnO3はベース板21と化学反応を起こ
し、La2Mn27層に変化して非イオン導電性材料層
22になる。ペースト状のランタンマンガナイト及びN
iOサーメットはそれぞれ導電体24a,24bにな
る。
Here, in the interconnector 12 of the fuel cell of Prototype Example 1, after pasting LaMnO 3 in a paste form onto the upper surface of a YSZ base plate 21 in a green sheet form by means of screen printing or the like, the diameter is applied to the base plate 21. A large number of 0.5 mm through-holes 21a are provided, and further, paste-like lanthanum manganite and NiO cermet are applied uniformly on the upper and lower surfaces of the base plate 21 so as to fill the through-holes 21a. Is. During firing, the pasty LaMnO 3 chemically reacts with the base plate 21 and changes into a La 2 Mn 2 O 7 layer and becomes the nonionic conductive material layer 22. Pasty Lantern Manganite and N
The iO cermets become the conductors 24a and 24b, respectively.

【0016】試作例2の燃料電池のインターコネクタ1
2はグリーンシート状のYSZベース板21に直径0.
5mmの貫通穴21aを多数個設けた後、ドクターブレ
ード法により作製したLaMnO3のグリーンシート
(このグリーンシートはベース板21に設けた貫通穴2
1aに連通する直径0.5mmの貫通穴が既に多数設け
られている)を貼り合わせ、さらに、ベース板21の上
下面にそれぞれペースト状のランタンマンガナイト及び
NiOサーメットを一様にかつ貫通穴21aを充填する
ように塗布して作製したものである。焼成時に、グリー
ンシート状のLaMnO3はベース板21と化学反応を
起こし、La2Mn27層に変化して非イオン導電性材
料層22になる。
Fuel cell interconnector 1 of prototype 2
2 is a green sheet-shaped YSZ base plate 21 having a diameter of 0.
After forming a large number of 5 mm through holes 21a, a LaMnO 3 green sheet manufactured by the doctor blade method (this green sheet is a through hole 2 formed in the base plate 21).
1a are already provided with a large number of through holes having a diameter of 0.5 mm), and paste-like lanthanum manganite and NiO cermet are uniformly applied to the upper and lower surfaces of the base plate 21, respectively. It is manufactured by applying so as to fill. At the time of firing, the green sheet-shaped LaMnO 3 chemically reacts with the base plate 21 and changes into a La 2 Mn 2 O 7 layer to become the non-ion conductive material layer 22.

【0017】比較例1の燃料電池のインターコネクタは
グリーンシート状のYSZベース板に直径0.5mmの
貫通穴を多数設けた後、ベース板の上下面にそれぞれペ
ースト状のランタンマンガナイト及びNiOサーメット
を一様にかつ貫通穴を充填するように塗布して作製した
ものである。従って、比較例1のインターコネクタは、
試作例1及び2におけるインターコネクタ12の非イオ
ン導電性材料層22を具備しないものである。
The fuel cell interconnector of Comparative Example 1 was prepared by forming a large number of through holes each having a diameter of 0.5 mm in a green sheet-shaped YSZ base plate, and then forming paste-shaped lanthanum manganite and NiO cermet on the upper and lower surfaces of the base plate, respectively. Is uniformly applied to fill the through holes. Therefore, the interconnector of Comparative Example 1 is
The non-ion conductive material layer 22 of the interconnector 12 in the prototype examples 1 and 2 is not provided.

【0018】比較例2の燃料電池のインターコネクタは
従来のランタンクロマイトからなるものである。表1に
示されるように、試作例1及び2と比較例1の燃料電池
は、焼成時にインターコネクタ12と他の部品(例え
ば、固体電解質1やディストリビュータ5,8等)が略
等しい収縮挙動をするため、インターコネクタ12の剥
がれやそり等の不良が発生しにくくなっており、良品率
が向上している。また、比較例1の燃料電池はインター
コネクタの表裏間に発生する逆起電力のため、燃料電池
の起電力が低い。これに対して、YSZベース板21の
上面に非イオン導電性材料層22を設けた試作例1及び
2の燃料電池は起電力が高い。
The interconnector of the fuel cell of Comparative Example 2 is made of conventional lanthanum chromite. As shown in Table 1, in the fuel cells of Prototype Examples 1 and 2 and Comparative Example 1, the interconnector 12 and other components (for example, the solid electrolyte 1 and the distributors 5 and 8) exhibited substantially the same shrinkage behavior during firing. Therefore, defects such as peeling and warpage of the interconnector 12 are less likely to occur, and the yield rate is improved. Further, the fuel cell of Comparative Example 1 has a low electromotive force because of the counter electromotive force generated between the front and back surfaces of the interconnector. On the other hand, the fuel cells of Prototype Examples 1 and 2 in which the nonionic conductive material layer 22 is provided on the upper surface of the YSZ base plate 21 have high electromotive force.

【0019】なお、本発明に係る固体電解質型燃料電池
は前記実施例に限定するものではなく、その要旨の範囲
内で種々に変形することができる。図3に示すようにイ
ンターコネクタ12のベース板21に設ける非イオン導
電性材料層22は、ベース板21の表面に必ずしも設け
る必要はなく、ベース板21の内部に設けてもよい。ま
た、非イオン導電性材料層22は一層に限定するもので
はなく、2層以上からなる多層構造となっていてもよ
い。
The solid oxide fuel cell according to the present invention is not limited to the above embodiment, but can be variously modified within the scope of its gist. As shown in FIG. 3, the nonionic conductive material layer 22 provided on the base plate 21 of the interconnector 12 does not necessarily have to be provided on the surface of the base plate 21, and may be provided inside the base plate 21. Further, the nonionic conductive material layer 22 is not limited to one layer, and may have a multi-layer structure composed of two or more layers.

【0020】また、前記実施例では、ベース板21にL
aMnO3のペーストを塗布、あるいはLaMnO3のシ
ートを貼り合わせた後、焼成することによりLa2Mn2
7層を形成したが、例えば、La2Mn27にバインダ
ーを加えドクターブレード法によりシートを作製し、こ
のシートをベース板21に貼り合わせる方法であっても
よい。
In the above embodiment, the base plate 21 has L
La 2 Mn 2 is formed by applying aMnO 3 paste or laminating a LaMnO 3 sheet and then firing.
Although the O 7 layer is formed, for example, a method may be used in which a binder is added to La 2 Mn 2 O 7 to prepare a sheet by a doctor blade method, and the sheet is attached to the base plate 21.

【0021】[0021]

【発明の効果】以上の説明で明らかなように、本発明に
係る固体電解質型燃料電池は、インターコネクタのベー
ス板の材料として固体電解質を主成分とする材料を使用
したので、インターコネクタは、焼成時に燃料電池の別
部品(例えば、固体電解質やディストリビュータ等)と
略等しい収縮挙動をし、剥がれやそり等を発生させるこ
となく別部品と共焼結できる。この結果、共焼結により
一体焼成した、ガスシール性が高く、稼働時の熱ストレ
スに対して安定性の高い固体電解質型燃料電池が得られ
る。
As is clear from the above description, the solid electrolyte fuel cell according to the present invention uses the material containing the solid electrolyte as the main component as the material of the base plate of the interconnector. During the firing, it has a contraction behavior which is substantially equal to that of another component of the fuel cell (for example, a solid electrolyte, a distributor, etc.), and can be co-sintered with another component without causing peeling or warping. As a result, it is possible to obtain a solid oxide fuel cell that is integrally fired by co-sintering, has a high gas sealing property, and is highly stable against thermal stress during operation.

【0022】また、ベース板に固体電解質を主成分とす
る材料を使用したためにベース板の表裏間に発生するお
それがあった逆起電力は、ベース板の表面又は内部に非
イオン導電性材料層を設けたので発生しない。従って、
起電力の高いものが得られる。さらに、固体電解質を主
成分とする材料に高いイオン導電性をもつジルコニアを
主成分とする材料を用い、かつ、非イオン導電性材料に
イオン電導性が低いLa2Mn27を用いれば、優れた
発電効率の燃料電池が得られる。
The counter electromotive force which may be generated between the front and back surfaces of the base plate due to the use of a material containing a solid electrolyte as a main component for the base plate has a nonionic conductive material layer on the surface or inside of the base plate. Since it is provided, it does not occur. Therefore,
High electromotive force can be obtained. Furthermore, if a material containing zirconia having high ionic conductivity as the main component is used as the material containing the solid electrolyte as the main component, and La 2 Mn 2 O 7 having low ionic conductivity is used as the non-ion conductive material, A fuel cell with excellent power generation efficiency can be obtained.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る固体電解質型燃料電池の一実施例
を示す一部を切り欠いた斜視図。
FIG. 1 is a partially cutaway perspective view showing an embodiment of a solid oxide fuel cell according to the present invention.

【図2】図1に示した固体電解質型燃料電池のインター
コネクタを示す垂直断面図。
FIG. 2 is a vertical cross-sectional view showing an interconnector of the solid oxide fuel cell shown in FIG.

【図3】固体電解質型燃料電池のインターコネクタの他
の実施例を示す垂直断面図。
FIG. 3 is a vertical cross-sectional view showing another embodiment of the interconnector of the solid oxide fuel cell.

【符号の説明】[Explanation of symbols]

1…固体電解質 2…燃料極 3…空気極 5,8…ディストリビュータ 12…インターコネクタ 21…ベース板 21a…貫通穴 22…非イオン導電性材料層 24a,24b…導電体 DESCRIPTION OF SYMBOLS 1 ... Solid electrolyte 2 ... Fuel electrode 3 ... Air electrode 5,8 ... Distributor 12 ... Interconnector 21 ... Base plate 21a ... Through hole 22 ... Non-ion conductive material layer 24a, 24b ... Conductor

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 表裏面に燃料極及び空気極を設けた固体
電解質と、ディストリビュータと、インターコネクタと
を積み重ねた固体電解質型燃料電池において、 前記インターコネクタが、固体電解質を主成分とする材
料からなる貫通穴を設けたベース板と、前記ベース板の
表面又は内部に設けた非イオン導電性材料層と、前記非
イオン導電性材料層を設けたベース板の表裏面に被覆さ
れ、かつ、前記貫通穴に充填された導電体とで構成され
ていることを特徴とする固体電解質型燃料電池。
1. A solid electrolyte fuel cell in which a solid electrolyte having a fuel electrode and an air electrode on the front and back surfaces, a distributor, and an interconnector are stacked, wherein the interconnector is made of a material containing a solid electrolyte as a main component. A base plate provided with a through hole, a nonionic conductive material layer provided on the surface or inside of the base plate, and the front and back surfaces of the base plate provided with the nonionic conductive material layer are covered, and A solid oxide fuel cell, comprising a conductor filled in a through hole.
【請求項2】 固体電解質を主成分とする材料がジルコ
ニアを主成分とする材料で、かつ、非イオン導電性材料
がLa2Mn27であることを特徴とする請求項1記載
の固体電解質型燃料電池。
2. The solid according to claim 1, wherein the material containing a solid electrolyte as a main component is a material containing zirconia as a main component, and the nonionic conductive material is La 2 Mn 2 O 7. Electrolyte fuel cell.
JP25679991A 1991-10-03 1991-10-03 Solid oxide fuel cell Expired - Fee Related JP3151872B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25679991A JP3151872B2 (en) 1991-10-03 1991-10-03 Solid oxide fuel cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25679991A JP3151872B2 (en) 1991-10-03 1991-10-03 Solid oxide fuel cell

Publications (2)

Publication Number Publication Date
JPH0594828A true JPH0594828A (en) 1993-04-16
JP3151872B2 JP3151872B2 (en) 2001-04-03

Family

ID=17297607

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25679991A Expired - Fee Related JP3151872B2 (en) 1991-10-03 1991-10-03 Solid oxide fuel cell

Country Status (1)

Country Link
JP (1) JP3151872B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7122264B2 (en) 1997-08-08 2006-10-17 Mitsubishi Heavy Industries, Ltd. Solid electrolyte type fuel battery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7122264B2 (en) 1997-08-08 2006-10-17 Mitsubishi Heavy Industries, Ltd. Solid electrolyte type fuel battery

Also Published As

Publication number Publication date
JP3151872B2 (en) 2001-04-03

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