JPH04248270A - Separator for fuel cell - Google Patents
Separator for fuel cellInfo
- Publication number
- JPH04248270A JPH04248270A JP3007284A JP728491A JPH04248270A JP H04248270 A JPH04248270 A JP H04248270A JP 3007284 A JP3007284 A JP 3007284A JP 728491 A JP728491 A JP 728491A JP H04248270 A JPH04248270 A JP H04248270A
- Authority
- JP
- Japan
- Prior art keywords
- separator
- fuel cell
- brazing
- brazing material
- molten carbonate
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 18
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 11
- 230000001590 oxidative effect Effects 0.000 claims abstract description 9
- 229910052709 silver Inorganic materials 0.000 claims abstract description 9
- 239000004332 silver Substances 0.000 claims abstract description 8
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052737 gold Inorganic materials 0.000 claims abstract description 7
- 239000010931 gold Substances 0.000 claims abstract description 7
- 238000005219 brazing Methods 0.000 claims description 45
- 239000000463 material Substances 0.000 claims description 25
- 230000007797 corrosion Effects 0.000 claims description 19
- 238000005260 corrosion Methods 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 15
- 239000000945 filler Substances 0.000 claims description 15
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 3
- 229910000679 solder Inorganic materials 0.000 abstract description 10
- 238000005476 soldering Methods 0.000 abstract 2
- 239000010970 precious metal Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 18
- 238000005192 partition Methods 0.000 description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 10
- 210000004027 cell Anatomy 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 229910000480 nickel oxide Inorganic materials 0.000 description 6
- 239000012212 insulator Substances 0.000 description 4
- 239000012495 reaction gas Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 229910000510 noble metal Inorganic materials 0.000 description 3
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- 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
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0247—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form
- H01M8/0254—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form corrugated or undulated
-
- 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
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は溶融炭酸塩型燃料電池用
セパレータに係り、特にそのカソード側において、カソ
ードガスの高温酸化雰囲気に対する耐食性に優れかつ低
抵抗のろう付け部を有するセパレータに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separator for a molten carbonate fuel cell, and more particularly to a separator having a low-resistance brazed portion on the cathode side that has excellent corrosion resistance against the high-temperature oxidizing atmosphere of the cathode gas.
【０００２】0002
【従来の技術】溶融炭酸塩型燃料電池に用いられるセパ
レータの各部材、例えば、仕切板、フレーム、波板、又
はカレントコレクタ等を相互に接合する際に用いるろう
材は、耐高温性の観点、導電性の観点等から、種々検討
されているがすべての条件を満足するものは未だ見出さ
れていない。[Prior Art] The brazing filler metal used for mutually bonding each component of a separator used in a molten carbonate fuel cell, such as a partition plate, a frame, a corrugated plate, or a current collector, has a high temperature resistance. Although various studies have been made from the viewpoint of conductivity, etc., no material has yet been found that satisfies all the conditions.
【０００３】即ち、一般に、溶融炭酸塩型燃料電池はそ
の運転時に、セパレータを含む電池本体は約 ６５０℃
の高温に保たれ、波板などの溝に依り形成されるガス流
路には、ガス組成が空気７０％炭酸ガス３０％より成る
カソードガスが常時流れており、各ろう付け部の表面は
酸化雰囲気に晒される。 また、溶融炭酸塩型燃料電
池では電解質としては、Ｌｉ２ＣＯ３及びＫ２ＣＯ３
の混合塩を高温（６５０ ℃）下で溶融させて用いてお
り、その強アルカリ液がカソードを通しセパレータ内へ
浸透して腐食を進行させる恐れもある。That is, in general, when a molten carbonate fuel cell is operated, the temperature of the cell body including the separator is about 650°C.
A cathode gas consisting of 70% air and 30% carbon dioxide gas is constantly flowing through the gas flow path formed by grooves in corrugated plates, etc., and the surface of each brazed part is oxidized. exposed to the atmosphere. In addition, in molten carbonate fuel cells, Li2CO3 and K2CO3 are used as electrolytes.
A mixed salt is melted at high temperature (650°C) and there is a risk that the strong alkaline solution may penetrate into the separator through the cathode and cause corrosion to proceed.
【０００４】ろう付け部の耐食性についてみてみるとこ
れらのろう付け部で酸化及び腐食が進行した場合、ろう
付け部の剥離、変形等に依る接触不良、または酸化物等
の絶縁物の生成などが起こり、電気抵抗が増大し、電池
性能低下の原因となる。また、ろう付け部の強度につい
て見てみると、電池運転時の反応熱に依りカソードはガ
ス流路を流れるガス温度よりも高温となるため、ろう付
け部の強度がろう付け部の腐食等に依り不足するとこの
時の熱応力によりろう付け部が剥離し、更にこの剥離面
が反応ガス（この場合カソードガス）に晒れ、酸化され
て電気抵抗を増大させる恐れもある。[0004] Looking at the corrosion resistance of brazed parts, if oxidation and corrosion progress in these brazed parts, poor contact due to peeling or deformation of the brazed parts, or the formation of insulators such as oxides may occur. This causes an increase in electrical resistance and a decrease in battery performance. Also, looking at the strength of the brazed part, the cathode becomes hotter than the temperature of the gas flowing through the gas flow path due to the reaction heat during battery operation, so the strength of the brazed part is reduced due to corrosion of the brazed part. If it is insufficient, the brazed portion will peel off due to the thermal stress at this time, and furthermore, this peeled surface will be exposed to the reaction gas (cathode gas in this case), and there is a risk that it will be oxidized and increase the electrical resistance.
【０００５】上述の様にセパレータのカソード側部材の
ろう付け部は高温酸化雰囲気に対する耐食性に優れかつ
良好な導電性を保っている必要がある。そのような問題
点を解決する手段の一例として、多孔性のニッケル板か
らなる電極とスペーサとしてのオーステナイト系ステン
レス鋼からなるバイポーラプレートを接合する際、急速
冷法により得られたシート状のＮｉアモルファスろうに
て接合する技術が知られている（特開昭６０−２０７２
５２号公報参照）。As mentioned above, the brazed portion of the cathode-side member of the separator must have excellent corrosion resistance against high-temperature oxidizing atmospheres and maintain good electrical conductivity. As an example of a means to solve such problems, when joining an electrode made of a porous nickel plate and a bipolar plate made of austenitic stainless steel as a spacer, a sheet-like Ni amorphous material obtained by a rapid cooling method is used. The technique of joining with solder is known (Japanese Patent Application Laid-Open No. 60-2072)
(See Publication No. 52).
【０００６】[0006]
【発明が解決するための課題】上記従来技術におけるＮ
ｉろう材は、接合部の電気の抵抗を少なくする点では有
効であるが、そのカソードガス（空気７０％、ＣＯ２
３０％、温度約 ６５０℃）雰囲気における耐食性が十
分とはいえず、実際の発電試験において、試験前にセパ
レータの波板とカレントコレクタをＮｉろう付けしたに
もかかわらず、試験終了時に電池本体を解体する際には
容易にカレントコレクタを剥離できる程、腐食が進行し
ている場合があることが確認された。[Problem to be solved by the invention] N in the above prior art
i Brazing filler metal is effective in reducing the electrical resistance of the joint, but its cathode gas (70% air, CO2
(30%, temperature approximately 650℃) atmosphere was not sufficient, and in actual power generation tests, even though the separator corrugated plate and current collector were brazed with Ni before the test, the battery body was removed at the end of the test. It was confirmed that corrosion had progressed to such an extent that the current collector could be easily peeled off during disassembly.
【０００７】また、Ｎｉは空気中で強熱された場合、酸
化ニッケル （ＮｉＯ）に変化するが、このＮｉＯは絶
縁体であり極めて電気抵抗が高いことが知られており、
従来のＮｉろう付けによるセパレータでは、そのカソー
ドガス雰囲気に晒される、波板−仕切板、及び波板−カ
レントコレクタ及びフレーム−仕切板間のろう材が電池
運転時に ＮｉＯに変化して、セパレータ内での電気抵
抗を増大させていることが充分考えられる。[0007] Furthermore, when Ni is ignited in air, it changes to nickel oxide (NiO), but it is known that NiO is an insulator and has extremely high electrical resistance.
In conventional Ni brazing separators, the brazing material between the corrugated plate and the partition plate, the corrugated plate and the current collector, and the frame and the partition plate, which are exposed to the cathode gas atmosphere, changes to NiO during battery operation, and the brazing material inside the separator. It is quite conceivable that this increases the electrical resistance at
【０００８】本発明の目的は、溶融炭酸塩型燃料電池用
セパレータにおいて、これらの問題点を解決し、耐食性
に優れかつ絶縁体を生成する恐れのないろう付け部を有
し、電気抵抗の少ないセパレータを提供することにある
。An object of the present invention is to solve these problems in a separator for a molten carbonate fuel cell, which has a brazed portion that is excellent in corrosion resistance and has no fear of forming an insulator, and has low electrical resistance. The purpose is to provide separators.
【０００９】[0009]
【課題を解決するための手段】本発明は、上記目的を達
成するために、溶融炭酸塩型燃料電池のセパレータのセ
パレータカソード側波板−仕切板、波板−カレントコレ
クタ及びフレーム−仕切板間など、少なくともカソード
ガスに晒される側の各部材を、酸化雰囲気下での耐酸化
性及び耐食性に優れたろう材を使用して相互に接合した
ことを特徴とする溶融炭酸塩型燃料電池用セパレータを
開示する。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a separator cathode side corrugated plate-partition plate, a corrugated plate-current collector, and a frame-partition plate gap of a separator of a molten carbonate fuel cell. A separator for a molten carbonate fuel cell, characterized in that at least each member on the side exposed to cathode gas is bonded to each other using a brazing filler metal that has excellent oxidation resistance and corrosion resistance in an oxidizing atmosphere. Disclose.
【００１０】用いるろう材は、電池運転温度である ７
００℃をこえるろう付け温度を有し、酸化雰囲気に対す
る耐食性に優れかつ導電性の良好な貴金属系のろう材で
あることが望ましく、ＪＩＳに規定されるＢＰｄ−１，
２，４， ６， ７， ９， １０， １１， １２，
１４に相当するパラジウムろう材、ＪＩＳに規定され
るＢＡｕ−１，２， ３， ４， １１， １２又はＢ
Ａｕ−１Ｖ，２Ｖ，３Ｖ，４Ｖ，１１Ｖ， １２Ｖに相
当する金ろう材、ＪＩＳに規定されるＢＡｇ−４，５，
６， ７， ７Ａ， ７Ｂ， ８， ８Ａ， １８，
２０， ２０Ａ， ２１， ２４に相当する銀ろう材
を単独であるいはそれらを選択的に組み合わせたものを
用い得る。[0010] The brazing material used is at the battery operating temperature 7
It is desirable to use a noble metal brazing material that has a brazing temperature exceeding 00°C, has excellent corrosion resistance against oxidizing atmospheres, and has good conductivity.
2, 4, 6, 7, 9, 10, 11, 12,
Palladium brazing metal corresponding to No. 14, BAu-1, 2, 3, 4, 11, 12 or B specified in JIS
Gold brazing metal corresponding to Au-1V, 2V, 3V, 4V, 11V, 12V, BAg-4, 5, specified by JIS
6, 7, 7A, 7B, 8, 8A, 18,
Silver fillers corresponding to Nos. 20, 20A, 21, and 24 may be used alone or in a selective combination thereof.
【００１１】[0011]
【作用】本発明において、セパレータに用いたパラジウ
ムろう、金ろう及び銀ろうは、酸化雰囲気における耐食
性に優れ、溶融炭酸塩型燃料電池におけるカソードガス
雰囲気（ａｉｒ ７０％、ＣＯ２ ３０％、温度約 ６
５０℃）下でも良好な耐食性を示す。このため、ろう付
け部の腐食によるろう付け強度の低下を防止することが
できる。また、これらろう材に含まれる貴金属はカソー
ドガス雰囲気下でも酸化されにくく、絶縁体となる様な
金属酸化物を生せずかつ、良好な導電性を有するため、
信頼性が高く電気抵抗の少ないろう付け部を形成するこ
とができる。[Operation] In the present invention, the palladium solder, gold solder, and silver solder used for the separator have excellent corrosion resistance in an oxidizing atmosphere, and can be used in a cathode gas atmosphere (air 70%, CO2 30%, temperature approx.
Shows good corrosion resistance even at temperatures below 50°C. Therefore, reduction in brazing strength due to corrosion of the brazed portion can be prevented. In addition, the noble metals contained in these brazing materials are resistant to oxidation even in a cathode gas atmosphere, do not produce metal oxides that can act as insulators, and have good conductivity.
A brazed portion with high reliability and low electrical resistance can be formed.
【００１２】0012
【実施例】本発明の一実施例を図１及び図２に示す。図
１は本発明におけるセパレータの斜視図、図２はセパレ
ータの断面図である。セパレータは図１に示す様に仕切
板１、カソード側フレーム２ａ、アノード側フレーム２
ｂ、反応ガスの流路となる波板３ａ， ３ｂ及び電極を
支持するカレントコレクタ４ａ，４ｂから構成される。
これら部材の材料としては高温時の耐食性の面からオー
ステナイト系ステンレス鋼が適当である。セパレータフ
レームには４辺に波板内にガスを導入する為の長穴（マ
ニホールド）が設けられており、波板溝により形成され
るガス流路内に反応ガスが流れ込む様に、向かい合うマ
ニホールド間に接する位置まで波板がくる様な構造にな
っている。また、セパレータの裏側でも同様に、波板が
表側とは溝方向が直交する様な方向に配置されており、
表側に対して直交する様な方向でガスが流れる様になっ
ている。Embodiment An embodiment of the present invention is shown in FIGS. 1 and 2. FIG. 1 is a perspective view of a separator according to the present invention, and FIG. 2 is a sectional view of the separator. As shown in Fig. 1, the separators include a partition plate 1, a cathode side frame 2a, and an anode side frame 2.
b, corrugated plates 3a, 3b that serve as flow paths for reaction gas, and current collectors 4a, 4b that support electrodes. As the material for these members, austenitic stainless steel is suitable from the viewpoint of corrosion resistance at high temperatures. The separator frame has elongated holes (manifolds) on four sides for introducing gas into the corrugated plate, and the space between the opposing manifolds is such that the reaction gas flows into the gas flow path formed by the corrugated plate grooves. The structure is such that the corrugated sheet comes up to the point where it touches. Similarly, on the back side of the separator, the corrugated plate is arranged in a direction such that the groove direction is perpendicular to the front side.
Gas flows in a direction perpendicular to the front side.
【００１３】以下、セパレータのカソード側の構造の詳
細を図２により説明する。中央に仕切板１がありその上
にカソード側波板３ａがろう付け部５ａにより接合され
ている。また、波板３ａの上にはカソード（電極）６（
２点鎖線部）を支持するためのカレントコレクタ４ａが
あり、波板３ａとカレントコレクタ４ａはろう付け部５
ｂにより接合されている。また、仕切板１とカソード側
フレーム２ａはろう付け部５ｃにより接合されている。
カソード６は酸化ニッケル ＮｉＯの多孔質焼結体であ
り、電池運転時に導電性を持たせるためにＬｉを添加し
ている。カソード側波板３ａ及びカレントコレクタ４ａ
はカソード６に反応ガスを拡散させる為に直径約２ｍｍ
の小孔を多数あげた多孔波板及び多孔板を用いている。The structure of the cathode side of the separator will be explained in detail below with reference to FIG. There is a partition plate 1 in the center, and a cathode side corrugated plate 3a is joined thereon by a brazed portion 5a. Moreover, a cathode (electrode) 6 (
The corrugated plate 3a and the current collector 4a are connected to the brazed part 5.
It is joined by b. Further, the partition plate 1 and the cathode side frame 2a are joined by a brazed portion 5c. The cathode 6 is a porous sintered body of nickel oxide (NiO), to which Li is added to provide conductivity during battery operation. Cathode side corrugated plate 3a and current collector 4a
is approximately 2 mm in diameter in order to diffuse the reaction gas to the cathode 6.
Perforated corrugated plates and perforated plates with many small holes are used.
【００１４】本実施例ではカソード側の仕切板−波板間
ろう付け部５ａ、波板−カレントコレクタ間ろう付け部
５ｂ、仕切板−フレーム間ろう付け部５ｃのろう材に、
カソードガス雰囲気下での耐食性に優れるパラジウムろ
う（ＪＩＳ，ＢＰｄ−７相当）（Ｐｄ：４．５〜５．５
％、Ａｇ：９４．５〜９５．５％）を、ヌアノード側部
材のろう付けには、アノードガス雰囲気下での耐食性に
優れるＮｉろう材（ＪＩＳ ＢＮｉ−２相当）を使用
した。In this embodiment, the brazing material of the brazing part 5a between the partition plate and the corrugated plate, the brazing part 5b between the corrugated plate and the current collector, and the brazing part 5c between the partition plate and the frame on the cathode side includes:
Palladium solder with excellent corrosion resistance under cathode gas atmosphere (JIS, BPd-7 equivalent) (Pd: 4.5-5.5
%, Ag: 94.5 to 95.5%), and a Ni brazing material (equivalent to JIS BNi-2), which has excellent corrosion resistance in an anode gas atmosphere, was used for brazing the anode side member.
【００１５】パラジウムろう材の主成分である銀は、金
属中最も電気抵抗が小さく、ろう付け部の電気抵抗の低
減にも有効である。また、この様な組成のろう材を利用
した場合、Ｎｉろうとパラジウムろうのろう付け温度が
ほぼ等しくなるため、アノード側部材のろう付けとカソ
ード側部材のろう付けとを同時に行えるといった利点も
ある。Silver, which is the main component of palladium brazing material, has the lowest electrical resistance among metals, and is also effective in reducing the electrical resistance of the brazed portion. Furthermore, when a brazing filler metal with such a composition is used, the brazing temperatures of the Ni solder and the palladium solder are approximately equal, so there is an advantage that the anode side member and the cathode side member can be brazed at the same time.
【００１６】上記以外の金ろう、銀ろう及びパラジウム
ろう材についてもその主成分は金及び銀等の貴金属であ
り、これらのろう材をセパレータのカソード側ろう材と
して用いた場合も、上述の例と同様な効果が得られる。
この時、電池運転時のセパレータを含む電池本体の最高
温度は ７００℃程度と予想されるため、少なくとも
８００℃以上のろう付け温度を持つことは特に望ましい
。[0016] Gold brazing filler metal, silver brazing filler metal and palladium brazing filler metal other than those mentioned above also have noble metals such as gold and silver as their main components, and when these brazing filler metals are used as the cathode side brazing filler metal of the separator, the above-mentioned example will also apply. A similar effect can be obtained. At this time, the maximum temperature of the battery body including the separator during battery operation is expected to be around 700℃, so at least
It is particularly desirable to have a brazing temperature of 800°C or higher.
【００１７】以上の点から金ろう材料としてはＪＩＳに
定める所のＢＡｕ−１， ２， ３， ４， １１，
１２又はＢＡｕ−１Ｖ， ２Ｖ，３Ｖ，４Ｖ，１１Ｖ，
１２Ｖ及びその相当品が適当である。銀ろう材料とし
てはＪＩＳに定める所のＢＡｇ−４， ５， ６， ７
， ７Ａ， ７Ｂ， ８， ８Ａ， １８， ２０，
２０Ａ， ２１， ２４及びその相当品が適当である。
また、パラジウムろう材料としては、前述のＪＩＳ．Ｂ
Ｐｄ−７相当品以外に、ＢＰｄ−１，２，４，６，９，
１０， １１， １２， １４材及びその相当品が適当
である。[0017] From the above points, BAu-1, 2, 3, 4, 11, and
12 or BAu-1V, 2V, 3V, 4V, 11V,
12V or equivalent is suitable. BAg-4, 5, 6, and 7 as specified by JIS are used as silver solder materials.
, 7A, 7B, 8, 8A, 18, 20,
20A, 21, 24 and their equivalents are suitable. Moreover, as a palladium brazing material, the above-mentioned JIS. B
In addition to Pd-7 equivalent products, BPd-1, 2, 4, 6, 9,
Materials No. 10, 11, 12, 14 and their equivalents are suitable.
【００１８】[0018]
【発明の効果】本発明によれば、従来のニッケルろう材
に比べ、カソードガス雰囲気に晒されるセパレータの仕
切板、フレーム、波板及びカレントコレクタ間のろう付
け部の耐食性及び導電性を向上させることができ、ろう
付け部の腐食及び酸化被膜の生成などによる電気抵抗の
増大等の恐れがない、長寿命で信頼性の高い、燃料電池
用セパレータを得ることができる。[Effects of the Invention] According to the present invention, compared to conventional nickel brazing materials, the corrosion resistance and conductivity of the separator partition plate, frame, corrugated plate, and the brazed portion between the current collector, which are exposed to the cathode gas atmosphere, are improved. Thus, it is possible to obtain a fuel cell separator that has a long life and high reliability, and is free from the risk of increased electrical resistance due to corrosion of the brazed portion and the formation of an oxide film.
【図１】セパレータ断面斜視図[Figure 1] Separator cross-sectional perspective view
【図２】セパレータ断面図[Figure 2] Separator sectional view
１…仕切板、２ａ…カソード側フレーム、２ｂ…アノー
ド側フレーム、３ａ…カソード側波板、３ｂ…アノード
側波板、４ａ…カソード側カレントコレクタ、４ｂ…ア
ノード側カレントコレクタ、５ａ…カソード側仕切板−
波板間ろう付け部、５ｂ…カソード側波板−カレントコ
レクタ間ろう付け部、５ｃ…カソード側仕切り−フレー
ム間ろう付け部、６…カソード1... Partition plate, 2a... Cathode side frame, 2b... Anode side frame, 3a... Cathode side corrugated plate, 3b... Anode side corrugated plate, 4a... Cathode side current collector, 4b... Anode side current collector, 5a... Cathode side partition board-
Brazed part between corrugated plates, 5b... Brazed part between cathode side corrugated plate and current collector, 5c... Brazed part between cathode side partition and frame, 6... Cathode
Claims (8)
の各部材を、酸化雰囲気下での耐酸化性及び耐食性に優
れたろう材を使用して相互に接合したことを特徴とする
溶融炭酸塩型燃料電池用セパレータ。1. A molten carbonate fuel cell characterized in that at least each member on the side exposed to cathode gas is bonded to each other using a brazing material that has excellent oxidation resistance and corrosion resistance in an oxidizing atmosphere. separator.
とを特徴とする、請求項１記載の溶融炭酸塩型燃料電池
用セパレータ。2. The separator for a molten carbonate fuel cell according to claim 1, wherein the brazing material is palladium brazing material.
れるＢＰｄ−１，２，４， ６， ７， ９， １０，
１１， １２， １４に相当するパラジウムろう材で
あることを特徴とする、請求項２記載の溶融炭酸塩型燃
料電池用セパレータ。[Claim 3] The palladium brazing filler metal is BPd-1, 2, 4, 6, 7, 9, 10, as defined in JIS.
3. The separator for a molten carbonate fuel cell according to claim 2, wherein the separator is a palladium brazing material corresponding to No. 11, 12, or 14.
とする、請求項１記載の溶融炭酸塩型燃料電池用セパレ
ータ。4. The separator for a molten carbonate fuel cell according to claim 1, wherein the brazing material is a gold brazing material.
ｕ−１，２， ３， ４， １１， １２又はＢＡｕ−
１Ｖ，２Ｖ，３Ｖ，４Ｖ，１１Ｖ， １２Ｖに相当する
金ろう材であることを特徴とする、請求項４記載の溶融
炭酸塩型燃料電池用セパレータ。[Claim 5] The gold brazing filler metal has a BA specified by JIS.
u-1, 2, 3, 4, 11, 12 or BAu-
5. The separator for a molten carbonate fuel cell according to claim 4, wherein the separator is a gold brazing material corresponding to 1V, 2V, 3V, 4V, 11V, and 12V.
とする、請求項１記載の溶融炭酸塩型燃料電池用セパレ
ータ。6. The separator for a molten carbonate fuel cell according to claim 1, wherein the brazing material is a silver brazing material.
ｇ−４，５， ６， ７， ７Ａ， ７Ｂ， ８， ８
Ａ， １８， ２０， ２０Ａ， ２１， ２４に相当
する銀ろう材であることをを特徴とする、請求項６記載
の溶融炭酸塩型燃料電池用セパレータ。[Claim 7] The silver brazing filler metal has a BA specified by JIS.
g-4, 5, 6, 7, 7A, 7B, 8, 8
7. The separator for a molten carbonate fuel cell according to claim 6, wherein the separator is a silver brazing material corresponding to A, 18, 20, 20A, 21, 24.
項６に記載のろう材を選択的に組み合わせたものである
ことを特徴とする、請求項１記載の溶融炭酸塩型燃料電
池用セパレータ。8. The molten carbonate fuel according to claim 1, wherein the brazing filler metal is a selective combination of the brazing filler metals according to claims 2, 4, and 6. Battery separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3007284A JPH04248270A (en) | 1991-01-24 | 1991-01-24 | Separator for fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3007284A JPH04248270A (en) | 1991-01-24 | 1991-01-24 | Separator for fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04248270A true JPH04248270A (en) | 1992-09-03 |
Family
ID=11661737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3007284A Pending JPH04248270A (en) | 1991-01-24 | 1991-01-24 | Separator for fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04248270A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004319290A (en) * | 2003-04-16 | 2004-11-11 | Ngk Spark Plug Co Ltd | Solid electrolyte fuel cell |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643962A (en) * | 1987-06-26 | 1989-01-09 | Hitachi Ltd | Separator for fuel cell |
-
1991
- 1991-01-24 JP JP3007284A patent/JPH04248270A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643962A (en) * | 1987-06-26 | 1989-01-09 | Hitachi Ltd | Separator for fuel cell |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004319290A (en) * | 2003-04-16 | 2004-11-11 | Ngk Spark Plug Co Ltd | Solid electrolyte fuel cell |
| JP4646102B2 (en) * | 2003-04-16 | 2011-03-09 | 日本特殊陶業株式会社 | Solid oxide fuel cell |
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