JPH08287930A - Conductive bond - Google Patents
Conductive bondInfo
- Publication number
- JPH08287930A JPH08287930A JP7082440A JP8244095A JPH08287930A JP H08287930 A JPH08287930 A JP H08287930A JP 7082440 A JP7082440 A JP 7082440A JP 8244095 A JP8244095 A JP 8244095A JP H08287930 A JPH08287930 A JP H08287930A
- Authority
- JP
- Japan
- Prior art keywords
- oxide
- bonding agent
- conductive bonding
- corrugated plate
- nickel oxide
- 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
Links
Classifications
-
- 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
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Conductive Materials (AREA)
- Fuel Cell (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、固体電解質燃料電池あ
るいは水蒸気電解セルの電極と他の構成部材を電気的に
接合する場合に用いられる導電性接合剤に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductive bonding agent used for electrically bonding electrodes of a solid electrolyte fuel cell or a steam electrolysis cell to other constituent members.
【０００２】[0002]
【従来の技術】周知の如く、固体電解質燃料電池（ＳＯ
ＦＣ）の一般構成としては、図２に示すものが知られて
いる。As is well known, solid electrolyte fuel cells (SO
As a general configuration of FC, the one shown in FIG. 2 is known.
【０００３】図中の符番１は、イットリア安定化ジルコ
ニア２の両面に電極３ａ，３ｂが形成された発電膜であ
る。この発電膜１の上側には電極接続用波板４ａ，イン
タコネクタ５ａが形成され、下側には電極接続用波板４
ｂ，インタコネクタ５ｂが形成されている。Reference numeral 1 in the figure is a power generation film in which electrodes 3a and 3b are formed on both surfaces of a yttria-stabilized zirconia 2. An electrode connecting corrugated plate 4a and an interconnector 5a are formed on the upper side of the power generation film 1, and an electrode connecting corrugated plate 4 is formed on the lower side.
b, an interconnector 5b is formed.
【０００４】こうした構成のＳＯＦＣにおいて、前記イ
ンタコネクタ５ａと電気接続用波板４ａとの間、電気接
続用波板４ａと電極３ａとの間、電極３ｂと電気接続用
波板４ｂとの間、電気接続用波板４ｂとインタコネクタ
５ｂとの間には、一般に導電性接合剤が用いられてい
る。In the SOFC having such a structure, between the interconnector 5a and the electrical connection corrugated plate 4a, between the electrical connection corrugated plate 4a and the electrode 3a, between the electrode 3b and the electrical connection corrugated plate 4b, A conductive adhesive is generally used between the electrical connection corrugated plate 4b and the interconnector 5b.
【０００５】[0005]
【発明が解決しようとする課題】ところで、低温で下部
部材間を電気的に接合する場合は、前記導電性接合剤と
して銀ペースト，白金ペーストが知られている。ここ
で、銀ペーストは銀の電気抵抗が低く、導電性接着剤と
して一般的に使用されている。しかし、銀の融点は約９
６０℃であり、上記ＳＯＦＣのように１０００℃で充電
するものには使用できない。また、白金ペーストの場合
は１０００℃でも使用可能であるが、金属であるため熱
膨脹率が大きく、かつコスト高になるという問題点があ
る。By the way, when electrically connecting the lower members at a low temperature, silver paste and platinum paste are known as the conductive bonding agent. Here, the silver paste has a low electric resistance of silver and is generally used as a conductive adhesive. However, the melting point of silver is about 9
Since it is 60 ° C., it cannot be used for the one that charges at 1000 ° C. like the SOFC. Further, the platinum paste can be used even at 1000 ° C., but since it is a metal, it has a large thermal expansion coefficient and a high cost.
【０００６】本発明はこうした事情を考慮してなされた
もので、接合する電極と酸化ニッケル，酸化鉄，酸化チ
タンの混合物材料とすることにより、熱膨脹率の不一致
による剥離を極力抑えることができるとともに、接合力
を強くし、更にコスト低減を図ることができる導電性接
合剤を提供することを目的とする。The present invention has been made in consideration of such circumstances, and by using a mixed material of electrodes to be joined and nickel oxide, iron oxide, and titanium oxide, peeling due to mismatch of thermal expansion coefficients can be suppressed as much as possible. An object of the present invention is to provide a conductive bonding agent that can strengthen the bonding force and further reduce the cost.
【０００７】[0007]
【課題を解決するための手段】本発明は、固体電解質燃
料電池あるいは水蒸気電解セルの水素電極とインタコネ
クタを電気的に接合する際に用いられる導電性接合剤に
おいて、酸化ニッケル，酸化鉄及び酸化チタンを含むこ
とを特徴とする導電性接合剤である。SUMMARY OF THE INVENTION The present invention provides a conductive bonding agent used for electrically bonding a hydrogen electrode and an interconnector of a solid electrolyte fuel cell or a steam electrolytic cell to nickel oxide, iron oxide and oxide. It is a conductive bonding agent containing titanium.
【０００８】本発明においては、前記酸化ニッケル，酸
化鉄及び酸化チタンの組成配合は、酸化ニッケル７０〜
９２％、酸化鉄３〜１０％、酸化チタン５〜２０％であ
ることが好ましい。In the present invention, the composition of nickel oxide, iron oxide and titanium oxide is such that nickel oxide 70-
92%, iron oxide 3 to 10%, and titanium oxide 5 to 20% are preferable.
【０００９】[0009]
【作用】本発明においては、接合する相手と同質の原料
である酸化ニッケルに酸化鉄及び酸化チタンを混合する
ことにより、接合強度を向上させることができると同時
に、熱膨脹率の低下により熱膨張の不一致による剥離を
極力防止することができ、良好な導電性接合剤を提供で
きるとともに、従来使用されていた白金に比べ大幅なコ
ストの低減が可能となる。In the present invention, by mixing iron oxide and titanium oxide into nickel oxide, which is a raw material of the same quality as that of the partner to be joined, the joint strength can be improved, and at the same time, the thermal expansion coefficient is lowered to reduce the thermal expansion. Peeling due to mismatch can be prevented as much as possible, a good conductive bonding agent can be provided, and the cost can be significantly reduced as compared with the conventionally used platinum.
【００１０】[0010]
【実施例】以下、本発明の実施例について図面を参照し
て説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１１】（実施例１）図１を参照する。図中の符番
11は、イットリア安定化ジルコニア12の両面に酸化ニッ
ケルとＹＳＺの混合物の燃料側電極13ａ，酸素側電極13
ｂを形成した発電膜である。この発電膜11上には、導電
性接合剤14を介して電極接続用波板15が形成されてい
る。なお、ＳＯＦＣ全体の構成は、既述した図２に示す
ような構成となる。Example 1 Reference is made to FIG. Numbers in the figure
11 is a fuel-side electrode 13a and a oxygen-side electrode 13a of a mixture of nickel oxide and YSZ on both sides of yttria-stabilized zirconia 12.
It is a power generation film in which b is formed. A corrugated plate 15 for electrode connection is formed on the power generation film 11 with a conductive bonding agent 14 interposed therebetween. The overall structure of the SOFC is as shown in FIG. 2 described above.
【００１２】前記導電性接合剤14は、次のようにして作
られる。即ち、燃料電池の燃料電極材料の酸化ニッケル
と酸化鉄，酸化チタンをそれぞれ酸化ニッケル７０〜９
２％、酸化鉄３〜１０％、酸化チタン５〜２０％で混合
し、有機溶媒としてブチルカルビトールを加え、ペース
ト状として導電性接合剤14を作る。なお、ブチルカルビ
トールの代りとしては粉体の分散性を向上させる他の溶
媒としてテレピン油，ブタノール等を使用してもよい。The conductive bonding agent 14 is manufactured as follows. That is, nickel oxide, iron oxide, and titanium oxide, which are fuel electrode materials for a fuel cell, are mixed with nickel oxide 70 to 9 respectively.
2%, iron oxide 3-10%, titanium oxide 5-20% are mixed, butyl carbitol is added as an organic solvent, and a conductive bonding agent 14 is prepared as a paste. Instead of butyl carbitol, turpentine oil, butanol or the like may be used as another solvent for improving the dispersibility of the powder.
【００１３】前記導電性接合剤14は、接着剤として前記
燃料側電極13ａと電極接続用波板15を接着した後、導電
性接合剤14による接合を行う。The conductive bonding agent 14 is bonded by the conductive bonding agent 14 after the fuel side electrode 13a and the electrode connecting corrugated plate 15 are bonded as an adhesive agent.
【００１４】上記実施例１においては、発電膜11の構成
である燃料側電極13ａと電極接続用波板15を接続する導
電性接合剤14が燃料側電極13ａと電気的抵抗の低い接着
を可能とする。導電性接合剤14は、酸化ニッケル，酸化
鉄，酸化チタンの混合物をブチルカルビトール等のビヒ
クル（有機溶媒）を用いてペースト状としたものを、ス
クリーンにあいた穴から印刷するスクリーンプリントの
方法によりインタコネクタ平板上に１００〜２００μｍ
の厚さに均一に塗布し、接続用波板を乗せた後、空気中
で熱処理を行う。In the first embodiment, the conductive bonding agent 14 connecting the fuel side electrode 13a and the electrode connecting corrugated plate 15 which is the structure of the power generation membrane 11 enables the fuel side electrode 13a to be bonded with low electric resistance. And The conductive bonding agent 14 is made by pasting a mixture of nickel oxide, iron oxide, and titanium oxide into a paste using a vehicle (organic solvent) such as butyl carbitol, and printing it through the holes in the screen. 100-200 μm on flat plate of interconnector
To a uniform thickness, and a corrugated plate for connection is placed thereon, followed by heat treatment in air.
【００１５】（実施例２）２０ｍｍ角のインタコネクタ
材料と電気接続用の波板のテストピース部品をＴｉＯ2
−Ｆｅ2 Ｏ3 −ＮｉＯ系接続材料を用いて接続し、接着
性，導電性について検討した。良好な接着性及び導電性
を示す範囲は、図３に示す通りであった。(Embodiment 2) A test piece part of a corrugated plate for electrical connection and a 20 mm square interconnector material is made of TiO 2
Connection was made using a —Fe 2 O 3 —NiO based connecting material, and the adhesiveness and conductivity were examined. The range showing good adhesion and conductivity was as shown in FIG.
【００１６】図３において、各頂点は成分１００％のポ
イントを示す。ＴｉＯ2 は接着性を向上し、ＮｉＯは導
電性を示し、Ｆｅ2 Ｏ3 は接着性を補助的に向上すると
同時に導電性も保有する。以上より、導電性の接合材料
として好ましい範囲は、図３の斜線部分Ｘに示す狭い範
囲である。In FIG. 3, each vertex represents a point at which the component is 100%. TiO 2 improves adhesion, NiO exhibits conductivity, and Fe 2 O 3 supplements adhesion and has conductivity at the same time. From the above, the preferable range for the conductive bonding material is the narrow range indicated by the hatched portion X in FIG.
【００１７】[0017]
【発明の効果】以上詳述したようにこの発明によれば、
熱膨脹率の不一致による剥離を極力抑えることができる
とともに、接合力を強くし、更にコスト低減を図ること
ができる導電性接合剤を提供できる。As described above in detail, according to the present invention,
It is possible to provide a conductive bonding agent that can suppress peeling due to mismatch of thermal expansion coefficients as much as possible, strengthen the bonding force, and further reduce the cost.
【図１】本発明の実施例１に係る導電性接合剤を用いた
固体電解質燃料電池の要部の説明図。FIG. 1 is an explanatory diagram of a main part of a solid electrolyte fuel cell using a conductive bonding agent according to a first embodiment of the present invention.
【図２】固体電解質燃料電池を展開した概略斜視図。FIG. 2 is a schematic perspective view of a developed solid oxide fuel cell.
【図３】本発明に係る導電性接合剤の適正範囲を示すＮ
ｉＯ，Ｆｅ2 Ｏ3 ，ＴｉＯ2 三相成分図。FIG. 3 is an N showing an appropriate range of the conductive bonding agent according to the present invention.
iO, Fe 2 O 3, TiO 2 three-phase component diagram.
11…発電膜、 12…イットリア安定化ジルコニア、
12ａ…燃料側電極、12ｂ…酸素側電極、14…導電性接合
剤、 15…電極接続用波板。11 ... Power generation membrane, 12 ... Yttria-stabilized zirconia,
12a ... Fuel side electrode, 12b ... Oxygen side electrode, 14 ... Conductive bonding agent, 15 ... Corrugated plate for electrode connection.
Claims (2)
セルの水素電極とインタコネクタを電気的に接合する際
に用いられる導電性接合剤において、酸化ニッケル，酸
化鉄及び酸化チタンを含むことを特徴とする導電性接合
剤。1. A conductive bonding agent used for electrically bonding a hydrogen electrode and an interconnector of a solid electrolyte fuel cell or a steam electrolysis cell, which contains nickel oxide, iron oxide and titanium oxide. Conductive bonding agent.
ンの組成配合が、それぞれ酸化ニッケル７０〜９２％、
酸化鉄３〜１０％、酸化チタン５〜２０％であることを
特徴とする請求項１記載の導電性接合剤。2. The composition of nickel oxide, iron oxide and titanium oxide is 70 to 92% of nickel oxide, respectively.
The conductive bonding agent according to claim 1, wherein iron oxide is 3 to 10% and titanium oxide is 5 to 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08244095A JP3229160B2 (en) | 1995-04-07 | 1995-04-07 | Conductive bonding agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08244095A JP3229160B2 (en) | 1995-04-07 | 1995-04-07 | Conductive bonding agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08287930A true JPH08287930A (en) | 1996-11-01 |
| JP3229160B2 JP3229160B2 (en) | 2001-11-12 |
Family
ID=13774610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08244095A Expired - Lifetime JP3229160B2 (en) | 1995-04-07 | 1995-04-07 | Conductive bonding agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3229160B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010186623A (en) * | 2009-02-12 | 2010-08-26 | Mitsubishi Heavy Ind Ltd | Conductive jointing material and solid electrolyte fuel cell equipped with the same |
| JP2011065975A (en) * | 2009-02-04 | 2011-03-31 | Ngk Insulators Ltd | Electrochemical device |
| WO2012132893A1 (en) * | 2011-03-30 | 2012-10-04 | 株式会社村田製作所 | Fuel cell |
| WO2012132894A1 (en) * | 2011-03-30 | 2012-10-04 | 株式会社村田製作所 | Fuel cell |
-
1995
- 1995-04-07 JP JP08244095A patent/JP3229160B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011065975A (en) * | 2009-02-04 | 2011-03-31 | Ngk Insulators Ltd | Electrochemical device |
| JP2010186623A (en) * | 2009-02-12 | 2010-08-26 | Mitsubishi Heavy Ind Ltd | Conductive jointing material and solid electrolyte fuel cell equipped with the same |
| WO2012132893A1 (en) * | 2011-03-30 | 2012-10-04 | 株式会社村田製作所 | Fuel cell |
| WO2012132894A1 (en) * | 2011-03-30 | 2012-10-04 | 株式会社村田製作所 | Fuel cell |
| JP5418722B2 (en) * | 2011-03-30 | 2014-02-19 | 株式会社村田製作所 | Fuel cell |
| JP5418723B2 (en) * | 2011-03-30 | 2014-02-19 | 株式会社村田製作所 | Fuel cell |
| JPWO2012132894A1 (en) * | 2011-03-30 | 2014-07-28 | 株式会社村田製作所 | Fuel cell |
| JPWO2012132893A1 (en) * | 2011-03-30 | 2014-07-28 | 株式会社村田製作所 | Fuel cell |
| US9287575B2 (en) | 2011-03-30 | 2016-03-15 | Murata Manufacturing Co., Ltd. | Fuel cell |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3229160B2 (en) | 2001-11-12 |
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