JP2002270200A - Gas separator for solid oxide fuel cell, member thereof, stack unit using the same, and solid oxide fuel cell stack - Google Patents
Gas separator for solid oxide fuel cell, member thereof, stack unit using the same, and solid oxide fuel cell stackInfo
- Publication number
- JP2002270200A JP2002270200A JP2001063772A JP2001063772A JP2002270200A JP 2002270200 A JP2002270200 A JP 2002270200A JP 2001063772 A JP2001063772 A JP 2001063772A JP 2001063772 A JP2001063772 A JP 2001063772A JP 2002270200 A JP2002270200 A JP 2002270200A
- Authority
- JP
- Japan
- Prior art keywords
- gas separator
- frame
- gas
- convex portion
- stack unit
- 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
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
- Fuel Cell (AREA)
Abstract
(57)【要約】
【課題】 部材相互の接触抵抗を低減し、ガスシール特
性に優れたガスセパレータ、スタックユニットおよびＳ
ＯＦＣスタックを提供すること。
【解決手段】 平板状の単セル３２を多数積層したＳＯ
ＦＣのガスセパレータにおいて、このガスセパレータ
は、上下に２分割された、上部材１０（４０）とこれに
接合された下部材２０（５０）とからなり、上部材は、
所定厚さの枠体部１１（４１）と、枠体部で囲まれた、
単セルおよび集電体を収容する空間部を有し、下部材
は、所定厚さの枠体部２１（５１）と、枠体部に囲まれ
た平板部２２（５２）と、平板部を貫通する電子流路２
３（５３）と、枠体部と平板部とで形成される、単セル
と集電体３１、３３を収容する空間部とを有し、このガ
スセパレータを用いてスタックユニットを形成し、スタ
ックユニットを多数積層してＳＯＦＣスタックを形成す
る。
PROBLEM TO BE SOLVED: To provide a gas separator, a stack unit, and an S having excellent gas sealing characteristics by reducing contact resistance between members.
To provide an OFC stack. SO SO in which a large number of flat single cells 32 are stacked.
In the gas separator of FC, this gas separator is composed of an upper member 10 (40), which is divided into upper and lower parts, and a lower member 20 (50) joined to the upper member 10 (40).
A frame portion 11 (41) having a predetermined thickness and a frame portion surrounded by the frame portion;
The lower member includes a frame 21 (51) having a predetermined thickness, a flat plate 22 (52) surrounded by the frame, and a flat plate. Electron flow path 2 penetrating
3 (53), and a space formed by the frame portion and the flat plate portion for accommodating the single cell and the current collectors 31 and 33, and a stack unit is formed using this gas separator. A number of units are stacked to form an SOFC stack.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、固体電解質型燃料
電池のガスセパレータおよびその部材並びにこれを用い
たスタックユニットおよび固体電解質型燃料電池スタッ
クに係り、特に、部材相互の接触抵抗が小さく、ガスシ
ール性に優れ、しかも堅牢で信頼性と安全性の高い固体
電解質型燃料電池のガスセパレータおよびその部材並び
にこれを用いたスタックユニットおよび固体電解質型燃
料電池スタックに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas separator for a solid oxide fuel cell, a member thereof, a stack unit using the same, and a solid oxide fuel cell stack. The present invention relates to a gas separator for a solid oxide fuel cell having excellent sealing properties, high robustness and high reliability and safety, its members, a stack unit using the same, and a solid oxide fuel cell stack.
【０００２】[0002]
【従来の技術】平板状固体電解質型燃料電池は、一般に
電池の最小単位である単セルを、集電板を組み込んだガ
スセパレータを介して多数積層し、電気的に直列および
／または並列に接続して燃料電池スタックとし、該燃料
電池スタックを箱体に収納したものである。固体電解質
型燃料電池は、電解液の漏洩がなく反応速度が大きいの
で、低公害のエネルギー源として注目されている。平板
状の固体電解質型燃料電池（以下、ＳＯＦＣともいう）
においては、ガスシールの達成と、電気的接触抵抗の低
減が同時に要求される。2. Description of the Related Art A plate-shaped solid oxide fuel cell generally has a large number of single cells, which are the minimum units of a battery, stacked via a gas separator incorporating a current collector and electrically connected in series and / or parallel. To form a fuel cell stack, and the fuel cell stack is housed in a box. Solid electrolyte fuel cells have attracted attention as low-pollution energy sources because they have a high reaction rate without leakage of electrolyte. Flat solid electrolyte fuel cell (hereinafter also referred to as SOFC)
In this case, achievement of gas sealing and reduction of electrical contact resistance are required at the same time.
【０００３】しかしながら、従来のＳＯＦＣではガスシ
ールの達成か、電気的接触抵抗の低減かの何れか一方の
みに着目してスタックを組み込んだものが多く、ガスシ
ールの達成と電気的接触抵抗の低減を両立することは困
難であった。すなわち、平板状のＳＯＦＣでは、ガスシ
ールに着目してセル周辺部をガスセパレータと強く接触
させることによってガスの漏洩を防止できるが、この場
合、セル中央部にある導電部の接触が甘くなり、これに
よって接触抵抗が大きくなるという問題があった。一
方、電気的接触抵抗の低減にのみ着目するとセル周辺部
とガスセパレータ周辺部との接触面圧が下がり、十分な
ガスシールができないという問題があった。このように
従来のＳＯＦＣは出力特性、長期特性および熱サイクル
特性の全てを十分に満足するものではなかった。[0003] However, many conventional SOFCs incorporate a stack focusing only on achieving either a gas seal or a reduction in electrical contact resistance, and achieving a gas seal and reducing the electrical contact resistance. It was difficult to achieve both. That is, in a flat-plate SOFC, gas leakage can be prevented by focusing the gas seal on the peripheral portion of the cell with the gas separator, but in this case, the contact of the conductive portion in the central portion of the cell becomes weak, As a result, there is a problem that the contact resistance increases. On the other hand, if attention is paid only to the reduction of the electric contact resistance, there is a problem that the contact surface pressure between the peripheral portion of the cell and the peripheral portion of the gas separator is reduced, and sufficient gas sealing cannot be performed. As described above, the conventional SOFC does not sufficiently satisfy all of the output characteristics, long-term characteristics, and heat cycle characteristics.
【０００４】[0004]
【発明が解決しようとする課題】本発明の課題は、上記
従来技術の問題点を解決し、各部材相互の接触抵抗を低
減して熱サイクルによる電池特性の急速な劣化を防止す
るとともに、ガスシール特性に優れ、堅牢で、信頼性と
安全性の高い、固体電解質型燃料電池のガスセパレータ
およびその部材並びにこれを用いたスタックユニットお
よび固体電解質型燃料電池スタックを提供することにあ
る。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, to reduce the contact resistance between members to prevent rapid deterioration of battery characteristics due to thermal cycling, It is an object of the present invention to provide a solid electrolyte fuel cell gas separator having excellent sealing characteristics, robustness, high reliability and safety, and members thereof, as well as a stack unit and a solid oxide fuel cell stack using the same.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するた
め、本発明者は、種々の実験によりＳＯＦＣにおける部
材相互のガスシールを確実に行うためにはシール面積を
できるだけ狭くすることが重要であり、耐熱サイクル性
を改善するためには導電部にある程度の面圧を常にかけ
る必要があるという知見を得た。そして、この知見に基
いて鋭意研究した結果、ガスセパレータを上下に２分割
した上部材と下部材とで形成される箱型構造とし、該箱
型構造のガスセパレータに単セルを収容してスタックユ
ニットとし、このスタックユニットを、下側ユニットの
単セル電極面または集電体面を上側ユニットの、例えば
電子流路が貫通する下部材の下面で押圧するように積
層、接続することにより、スタックユニット相互の電気
的接触抵抗が低減することを見出し、また、各スタック
ユニットを構成するガスセパレータ用の上下部材の上ま
たは下面外周部にそれぞれ少なくとも二つ以上の段差部
を設け、上側ユニットの下面の段差部と下側ユニットの
上面の段差部がそれぞれ嵌合するように積層させてガス
シール部を形成することにより、スタックユニット相互
間のガスシール性が著しく向上すること等を見出し、本
発明に到達した。In order to solve the above-mentioned problems, it is important for the present inventors to make the sealing area as small as possible in order to surely perform gas sealing between members in an SOFC through various experiments. It has been found that it is necessary to always apply a certain surface pressure to the conductive portion in order to improve the heat cycle resistance. As a result of earnest research based on this finding, the gas separator is formed into a box-shaped structure formed by an upper member and a lower member which are divided into two parts, and a single cell is housed in the box-shaped gas separator and stacked. By stacking and connecting the stack units such that the single cell electrode surface or the current collector surface of the lower unit is pressed by the lower surface of the upper unit, for example, the lower member through which the electron flow path passes, the stack unit is formed. It has been found that the mutual electrical contact resistance is reduced, and at least two or more steps are provided on the upper or lower periphery of the upper and lower members for the gas separator constituting each stack unit, and the lower surface of the upper unit is provided. By stacking the steps so that the steps and the steps on the upper surface of the lower unit fit each other to form a gas seal, the stack unit phase Found such that the gas sealing property between is significantly improved, thereby achieving the present invention.
【０００６】すなわち、本願で特許請求する発明は、以
下のとおりである。 （１）平板状の単セルを多数積層した固体電解質型燃料
電池の前記単セル相互間にガス流路を形成するととも
に、前記単セル相互を電気的に接続する固体電解質型燃
料電池のガスセパレータにおいて、該ガスセパレータ
は、上下に２分割された、上部材と該上部材に接合され
た下部材とからなり、前記上部材は、所定厚さの枠体部
と、該枠体部で囲まれた、単セルおよび該単セルの電極
膜に当接される集電体を収容する空間部を有し、前記下
部材は、所定厚さの枠体部と、該枠体部に囲まれた平板
部と、該平板部を貫通する複数の電子流路と、前記枠体
部と平板部とで形成される、前記単セルおよび該単セル
の電極膜に当接される集電体を収容する空間部とを有す
ることを特徴とする固体電解質型燃料電池のガスセパレ
ータ。That is, the invention claimed in the present application is as follows. (1) A gas separator for a solid oxide fuel cell that forms a gas flow path between the single cells and electrically connects the single cells to each other in a solid oxide fuel cell in which a large number of flat single cells are stacked. Wherein the gas separator comprises an upper member and a lower member joined to the upper member, which are vertically divided into two parts, wherein the upper member is surrounded by a frame having a predetermined thickness and the frame. A space portion for accommodating a single cell and a current collector that is in contact with the electrode film of the single cell, wherein the lower member is surrounded by a frame portion having a predetermined thickness and the frame portion. A flat plate portion, a plurality of electron flow paths penetrating the flat plate portion, a current collector formed in the frame portion and the flat plate portion, which is in contact with the single cell and the electrode film of the single cell. A gas separator for a solid oxide fuel cell, comprising: a space for accommodating the gas separator.
【０００７】（２）前記電子流路が、前記下部材の平板
部を貫通する貫通孔に充填されたＬａＣｒＯ3 系セラミ
ックス製電子流路材および金属フェルトまたはサーメッ
トからなることを特徴とする上記（１）に記載の固体電
解質型燃料電池のガスセパレータ。 （３）上記（１）または（２）に記載のガスセパレータ
用の上または下部材であって、枠体部上面または下面
に、該枠体部の外周または内周に沿って所定間隔を隔て
て設けられた少なくとも二つの段差部を有することを特
徴とするガスセパレータ用の部材。(2) The electron flow path is made of a LaCrO 3 ceramic electron flow path material and a metal felt or cermet filled in a through hole penetrating the flat plate portion of the lower member. The gas separator for a solid oxide fuel cell according to 1). (3) An upper or lower member for the gas separator according to the above (1) or (2), wherein a predetermined interval is provided on the upper surface or the lower surface of the frame body along the outer circumference or the inner circumference of the frame body. A member for a gas separator, comprising:
【０００８】（４）前記枠体部上面の一部または枠体部
上面の段差部の一部を内側に突出させて凸状部を設け、
該凸状部に対向する枠体部に前記凸状部に相応する凹状
部を設け、前記凸状部、凹状部および／またはその隣接
部に枠体部または平板部を貫通するガス流路孔を設けた
ことを特徴とする上記（３）に記載のガスセパレータ用
の部材。 （５）上記（１）〜（４）の何れかに記載のガスセパレ
ータ用の部材であって、マグネシア（ＭｇＯ）とスピネ
ル（ＭｇＡｌ2 Ｏ4 ）を主成分とする、一体成形された
緻密質焼結体または薄板状の緻密質焼結板の接合体であ
って、前記ＭｇＯとＭｇＡｌ2 Ｏ4 の混合比が重量比で
３０／７０〜７０／３０であることを特徴とするガスセ
パレータ用の部材。(4) A convex portion is provided by projecting a part of the upper surface of the frame portion or a part of a step portion on the upper surface of the frame portion inward.
A concave portion corresponding to the convex portion is provided in the frame portion facing the convex portion, and a gas flow passage hole penetrating the frame portion or the flat plate portion in the convex portion, the concave portion, and / or the adjacent portion. The member for a gas separator according to (3), wherein: (5) The member for a gas separator according to any one of the above (1) to (4), which is a dense, integrally molded material mainly composed of magnesia (MgO) and spinel (MgAl 2 O 4 ). A joined body of a sintered body or a thin dense sintered plate, wherein the mixing ratio of MgO and MgAl 2 O 4 is 30/70 to 70/30 by weight. Members.
【０００９】（６）枠体部の上面の一部を内側に突出さ
せて凸状部を設け、該凸状部に対向する枠体部に前記凸
状部に相応する凹状部を設け、前記凸状部および該凸状
部に隣接する平板部に枠体部または平板部を貫通するガ
ス流路孔を設けた上記（４）に記載のガスセパレータ用
の下部材と、枠体部上面の段差部の一部を内側に突出さ
せて凸状部を設け、該凸状部に対向する段差部に前記凸
状部に相応する凹状部を設け、前記凸状部および凹状部
に枠体部を貫通するガス流路孔を設けた上記（４）に記
載のガスセパレータ用の上部材と、前記ガスセパレータ
用の下部材の空間部に収容された空気側集電体と、該空
気側集電体に空気極膜が当接するように配置された単セ
ルと、該単セルの上面外周部の固体電解質膜および前記
下部材の枠体部上面に枠体部下面が当接するように接合
された、前記ガスセパレータ用上部材と、該ガスセパレ
ータ用上部材の枠体部で囲まれた空間部に収容され、前
記単セルの燃料極膜に当接するように配置された燃料側
集電体とを有し、前記上部材の凹状部に設けられたガス
流路孔と下部材の凸状部に設けられたガス流路孔を連通
させたことを特徴とするスタックユニット。(6) A projecting portion is provided by projecting a part of the upper surface of the frame portion inward, and a concave portion corresponding to the projecting portion is provided in the frame portion facing the projecting portion. The lower member for a gas separator according to the above (4), wherein the convex portion and the flat plate portion adjacent to the convex portion are provided with a frame body portion or a gas flow passage hole penetrating the flat plate portion, A convex portion is provided by projecting a part of the step portion inward, a concave portion corresponding to the convex portion is provided on a step portion facing the convex portion, and a frame body portion is provided on the convex portion and the concave portion. The upper member for a gas separator according to the above (4), provided with a gas flow passage hole penetrating through, the air-side current collector housed in a space of the lower member for the gas separator, and the air-side current collector. A single cell in which an air electrode membrane is placed in contact with the electric body; The upper portion for the gas separator, which is joined so that the lower surface of the frame portion abuts, is housed in the space surrounded by the frame portion of the upper member for the gas separator, and the fuel electrode film of the single cell A fuel-side current collector disposed so as to abut, and a gas flow path hole provided in a concave part of the upper member and a gas flow path hole provided in a convex part of the lower member communicated with each other. A stack unit, characterized in that:
【００１０】（７）枠体部の上面の一部を内側に突出さ
せて凸状部を設け、該凸状部に対向する枠体部に前記凸
状部に相応する凹状部を設け、該凹状部および該凹状部
に隣接する枠体部に該枠体部または平板部を貫通するガ
ス流路孔を設けた上記（４）に記載のガスセパレータ用
下部材と、枠体部上面の段差部の一部を内側に突出させ
て凸状部を設け、該凸状部に対向する段差部に前記凸状
部に相応する凹状部を設け、前記凸状部に隣接する枠体
部および凹状部に隣接する枠体部に、枠体部を貫通する
ガス流路孔を設けた上記（４）に記載のガスセパレータ
用上部材と、前記ガスセパレータ用下部材の空間部に収
容された空気側集電体と、該空気側集電体に空気極膜が
当接するように配置された単セルと、該単セルの上面外
周部の固体電解質膜および前記下部材の枠体部上面に枠
体部下面が当接するように接合された、前記ガスセパレ
ータ用上部材と、該上部材の枠体部で囲まれた空間部に
収容され、前記単セルの燃料極膜に当接するように配置
された燃料側集電体とを有し、前記上部材の凸状部に隣
接して設けられたガス流路孔と下部材の凹状部に隣接し
て設けられたガス流路孔を連通させたことを特徴とする
スタックユニット。(7) A projecting portion is provided by projecting a part of the upper surface of the frame portion inward, and a concave portion corresponding to the projecting portion is provided in the frame portion facing the projecting portion. The lower member for a gas separator according to (4), wherein the concave portion and the frame portion adjacent to the concave portion are provided with a gas flow passage hole penetrating the frame portion or the flat plate portion, and a step between the upper surface of the frame portion. A part is protruded inward to provide a convex part, a step part facing the convex part is provided with a concave part corresponding to the convex part, and a frame part and a concave part adjacent to the convex part are provided. The upper part for a gas separator according to the above (4), in which a gas passage hole penetrating the frame part is provided in the frame part adjacent to the part, and the air contained in the space part of the lower part for the gas separator. Side current collector, a single cell arranged such that an air electrode membrane is in contact with the air side current collector, and a solid electrolyte at an outer peripheral portion of an upper surface of the single cell And an upper member for a gas separator, which is joined so that a lower surface of the frame portion abuts on an upper surface of the frame portion of the lower member, and is accommodated in a space surrounded by the frame portion of the upper member; A fuel-side current collector disposed in contact with the fuel electrode membrane of the cell, and a gas passage hole provided adjacent to the convex portion of the upper member and a concave portion of the lower member adjacent to the concave portion of the lower member. A stack unit characterized in that gas passage holes provided are connected to each other.
【００１１】（８）上記（６）に記載のスタックユニッ
トと、（７）に記載のスタックユニットを、上側スタッ
クユニットのガスセパレータ用下部材の平板部下面で下
側スタックユニットの燃料側集電体の上面を押圧するよ
うに、かつ上側スタックユニットのガスセパレータ用下
部材の枠体部下面に設けられた少なくとも二つの段差部
がそれぞれ下側スタックユニットのガスセパレータ用上
部材の枠体部上面に設けられた少なくとも二つの段差部
に嵌合してガスシール部を形成するように交互に多数積
層し、各スタックユニットの単セルを前記ガスセパレー
タ用下部材の平板部を貫通する電子流路を介して電気的
に直列に接続したことを特徴とする固体電解質型燃料電
池スタック。(8) The stack unit described in (6) and the stack unit described in (7) are obtained by collecting the fuel on the lower side of the lower stack unit on the lower surface of the flat plate portion of the lower member for the gas separator of the upper stack unit. At least two step portions provided on the lower surface of the frame portion of the lower member for the gas separator of the upper stack unit so as to press the upper surface of the body, and the upper surface of the frame portion of the upper member for the gas separator of the lower stack unit, respectively. An electronic flow path that is formed by stacking a large number of layers alternately so as to fit into at least two steps provided in the lower part for the gas separator so as to form a gas seal part. A solid oxide fuel cell stack electrically connected in series via a fuel cell.
【００１２】[0012]
【発明の実施の形態】次に、本発明を図面を用いて詳細
に説明する。図１および図２は、本発明の一実施例であ
る固体電解質型燃料電池のガスセパレータ（以下、単に
ガスセパレータという）の構成部材を示す説明図であ
り、図１はガスセパレータ用上部材の一部切欠斜視図、
図２は、図１に示した上部材に接合されるガスセパレー
タ用下部材の一部切欠斜視図である。また、後述する図
３および図４は、ガスセパレータ用上部材および下部材
を用いて組み立てた本発明のスタックユニットを示す説
明図である。Next, the present invention will be described in detail with reference to the drawings. 1 and 2 are explanatory views showing constituent members of a gas separator (hereinafter, simply referred to as a gas separator) of a solid oxide fuel cell according to one embodiment of the present invention. FIG. 1 shows an upper member for a gas separator. Partially cutaway perspective view,
FIG. 2 is a partially cutaway perspective view of a lower member for a gas separator joined to the upper member shown in FIG. 3 and 4 to be described later are explanatory views showing a stack unit of the present invention assembled using an upper member and a lower member for a gas separator.
【００１３】図１および図３において、本発明のガスセ
パレータ用上部材（以下、単に上部材ともいう）１０
は、所定厚さの枠体部１１と、該枠体部１１で囲まれ
た、単セルおよび該単セルの電極膜に当接される集電体
を収容する空間部を有する。また図２および図３におい
て、本発明のガスセパレータ用下部材（以下、単に下部
材ともいう）２０は、所定厚さの枠体部２１と、該枠体
部２１に囲まれた平板部２２と、該平板部２２を貫通す
る複数の電子流路２３と、前記枠体部２１と平板部２２
とで形成される、単セルおよび該単セルの電極膜に当接
される集電体を収容する空間部を有する本実施例におい
て、上部材および下部材は、それぞれ２種類用意され、
２種類の上部材および下部材を用いて２種類のスタック
ユニットが形成される。これによって、スタックユニッ
トを多数積層した際、ガス流路が直列に連結されるよう
になる。In FIG. 1 and FIG. 3, an upper member (hereinafter simply referred to as an upper member) 10 for a gas separator of the present invention is shown.
Has a frame portion 11 having a predetermined thickness, and a space surrounded by the frame portion 11 for accommodating a single cell and a current collector that is in contact with an electrode film of the single cell. 2 and 3, a lower member 20 for a gas separator (hereinafter, also simply referred to as a lower member) of the present invention includes a frame portion 21 having a predetermined thickness and a flat plate portion 22 surrounded by the frame portion 21. A plurality of electron flow paths 23 penetrating the flat plate portion 22; the frame portion 21 and the flat plate portion 22;
In this embodiment having a space for accommodating a single cell and a current collector contacting the electrode film of the single cell, two types of upper member and lower member are prepared,
Two types of stack units are formed using two types of upper members and lower members. Thus, when a large number of stack units are stacked, the gas flow paths are connected in series.
【００１４】図３および図４は、ガスセパレータ用上部
材および下部材を用いて組み立てた、それぞれ本発明の
第１のスタックユニットおよび第２のスタックユニット
を示す説明図および組立図である。図３において、ガス
セパレータ用上部材１０は、枠体部１１の上面に、該枠
体部１１の外周または内周に沿って所定間隔を隔てて設
けられた二つの段差部１２、１３を有する。また、この
上部材１０は、段差部１３の一部を内側に突出させた凸
状部１４を有し、該凸状部１４に対向する段差部１３に
前記凸状部１４に相応する凹状部１５を有し、凸状部１
４および凹状部１５にはそれぞれ枠体部１１を貫通する
ガス流路孔１６および１７が設けられている。FIGS. 3 and 4 are an explanatory view and an assembly view, respectively, showing the first stack unit and the second stack unit of the present invention assembled using the upper and lower members for the gas separator. In FIG. 3, the upper member 10 for a gas separator has two step portions 12, 13 provided on the upper surface of the frame portion 11 at predetermined intervals along the outer circumference or the inner circumference of the frame portion 11. . The upper member 10 has a convex portion 14 in which a part of the step portion 13 is protruded inward, and a concave portion corresponding to the convex portion 14 is provided on the step portion 13 facing the convex portion 14. 15 and the convex portion 1
The gas flow holes 16 and 17 penetrating the frame 11 are provided in the recess 4 and the recess 15, respectively.
【００１５】一方、ガスセパレータ用下部材２０は、枠
体部２１の上面の一部を内側に突出させた凸状部２４を
有し、該凸状部２４に対向する枠体部に前記凸状部２４
に相応する凹状部２５を有し、前記凸状部２４および該
凸状部２４に隣接する平板部２２にそれぞれ枠体部また
は平板部を貫通するガス流路孔２７および２６が設けら
れている。On the other hand, the lower member 20 for a gas separator has a protruding portion 24 in which a part of the upper surface of the frame portion 21 protrudes inward. Shape part 24
The convex portion 24 and the flat plate portion 22 adjacent to the convex portion 24 are provided with gas passage holes 27 and 26 penetrating through the frame portion or the flat plate portion, respectively. .
【００１６】そして第１のスタックユニット３０は、ガ
スセパレータ用下部材２０と、該下部材２０の空間部に
収容された空気側集電体３１と、該空気側集電体３１に
空気極膜が当接するように配置された単セル３２と、該
単セル３２の上面外周部の固体電解質膜および前記下部
材２０の枠体部２１の上面に下面が当接するように接合
されたガスセパレータ用上部材１０と、該上部材１０の
枠体部１１で囲まれた空間部に収容され、前記単セル３
２の燃料極膜に当接するように配置された燃料側集電体
３３とを有し、前記上部材１０の凹状部１５に設けられ
たガス流路孔１７と下部材２０の凸状部２４に設けられ
たガス流路孔２７が連通するように接合させたものであ
る。The first stack unit 30 includes a lower member 20 for a gas separator, an air-side current collector 31 housed in a space of the lower member 20, and an air electrode film on the air-side current collector 31. And a gas separator joined such that the lower surface abuts on the solid electrolyte membrane on the outer peripheral portion of the upper surface of the single cell 32 and the upper surface of the frame portion 21 of the lower member 20. The single cell 3 is accommodated in a space surrounded by an upper member 10 and a frame 11 of the upper member 10.
A gas flow hole 17 provided in the concave portion 15 of the upper member 10 and a convex portion 24 of the lower member 20. Are joined so that the gas flow passage holes 27 provided in the holes communicate with each other.
【００１７】図４において、ガスセパレータ用上部材４
０は、枠体部４１の上面に、該枠体部４１の外周または
内周に沿って所定間隔を隔てて設けられた二つの段差部
４２、４３を有する。また、この上部材４０は、内周側
段差部４３の一部を内側に突出させた凸状部４４を有
し、該凸状部４４に対向する内周側段差部４３に前記凸
状部４４に相応する凹状部４５を有し、凸状部４４に隣
接する枠体部および凹状部４５に隣接する枠体部にそれ
ぞれ該枠体部を貫通するガス流路孔４７および４６を有
している。In FIG. 4, an upper member 4 for a gas separator is used.
Reference numeral 0 denotes two step portions 42 and 43 provided on the upper surface of the frame body portion 41 at predetermined intervals along the outer periphery or the inner periphery of the frame body portion 41. The upper member 40 has a convex portion 44 in which a part of the inner peripheral step 43 is protruded inward, and the inner peripheral step 43 opposed to the convex 44 has the convex portion 43. 44 has a concave portion 45 corresponding to the convex portion 44, and has a gas passage hole 47 and 46 penetrating the frame portion adjacent to the convex portion 44 and the frame portion adjacent to the concave portion 45, respectively. ing.
【００１８】一方、下部材５０は、枠体部５１の上面の
一部を内側に突出させた凸状部５４を有し、該凸状部５
４に対向する枠体部に前記凸状部５４に相応する凹状部
５５を有し、該凹状部５５および該凹状部５５に隣接す
る枠体部５１にそれぞれ枠体部または平板部を貫通する
ガス流路孔５６および５７が設けられている。On the other hand, the lower member 50 has a convex portion 54 in which a part of the upper surface of the frame body portion 51 projects inward.
4 has a concave portion 55 corresponding to the convex portion 54, and the concave portion 55 and the frame portion 51 adjacent to the concave portion 55 penetrate the frame portion or the flat plate portion, respectively. Gas flow holes 56 and 57 are provided.
【００１９】そして第２のスタックユニット６０は、前
記第１のスタックユニットの下部材２０に代えて下部材
５０を用い、上部材１０に代えて上部材４０を用いて第
１のスタックユニットと同様に組立て、前記上部材４０
の凸状部の近傍に設けたガス流路孔４７と下部材５０の
凹状部５５の近傍に設けたガス流路孔５７を連通させも
のである。The second stack unit 60 uses the lower member 50 instead of the lower member 20 of the first stack unit and the upper member 40 instead of the upper member 10 in the same manner as the first stack unit. And the upper member 40
The gas flow path hole 47 provided near the concave portion 55 of the lower member 50 and the gas flow path hole 57 provided near the concave portion 55 of the lower member 50 communicate with each other.
【００２０】図５は、第１スタックユニットのガスセパ
レータ用下部材の下面（裏面）を示す説明図、図６は、
第２スタックユニットのガスセパレータ用下部材の下面
（裏面）を示す説明図である。図５において、ガスセパ
レータ用下部材２０の裏面には、その外周に沿って所定
間隔を隔てて二つの段差部２８および２９が形成されて
おり、段差部２９には、第２スタックユニット（図４参
照）の上部材４０の段差部４３と嵌合するように凸状部
および凹状部が設けられている。また、図６において、
ガスセパレータ用下部材５０の裏面には、その外周に沿
って所定間隔を隔てて二つの段差部５８および５９が形
成されており、段差部５９には、第１スタックユニット
（図３参照）の上部材１０の段差部１３と嵌合するよう
に凸状部および凹状部が設けられている。FIG. 5 is an explanatory view showing the lower surface (back surface) of the lower member for the gas separator of the first stack unit, and FIG.
It is explanatory drawing which shows the lower surface (back surface) of the lower member for gas separators of a 2nd stack unit. In FIG. 5, on the back surface of the lower member 20 for a gas separator, two step portions 28 and 29 are formed at a predetermined interval along the outer periphery, and the step portion 29 has a second stack unit (FIG. 5). (See 4) A convex portion and a concave portion are provided so as to fit with the step portion 43 of the upper member 40. In FIG. 6,
On the back surface of the lower member 50 for a gas separator, two step portions 58 and 59 are formed at a predetermined interval along the outer periphery, and the step portion 59 is provided with the first stack unit (see FIG. 3). A convex portion and a concave portion are provided so as to fit with the step portion 13 of the upper member 10.
【００２１】図７は、複数のスタックユニットを積層し
た本発明の固体電解質型燃料電池スタックの説明図であ
る。また図８は、図７のVIII−VIII線矢視方向一部断面
図である。図７および８において、図３の第１スタック
ユニット３０と図４の第２スタックユニット６０が、例
えば上側スタックユニット（第２のスタックユニット６
０）の下部材５０の平板部の下面で下側スタックユニッ
ト（第１のスタックユニット３０）の燃料側集電体３３
の上面を押圧するように、かつ上側スタックユニット６
０の下部材５０の枠体部下面に設けられた二つの段差部
がそれぞれ下側スタックユニット３０の上部材１０の枠
体部上面に設けられた二つの段差部に嵌合してガスシー
ル部８１を形成するように交互に多数積層し、各スタッ
クユニットの単セル３２をガスセパレータ用下部材の平
板部を貫通する電子流路２３を介して電気的に直列に接
続した固体電解質型燃料電池スタックが示されている。FIG. 7 is an explanatory diagram of a solid oxide fuel cell stack according to the present invention in which a plurality of stack units are stacked. FIG. 8 is a partial sectional view taken along line VIII-VIII of FIG. 7 and 8, the first stack unit 30 in FIG. 3 and the second stack unit 60 in FIG. 4 are, for example, upper stack units (second stack unit 6).
0) The fuel-side current collector 33 of the lower stack unit (first stack unit 30) on the lower surface of the flat plate portion of the lower member
So that the upper surface of the upper stack unit 6 is pressed.
The two step portions provided on the lower surface of the frame member of the lower member 50 are fitted into the two step portions provided on the upper surface of the frame member of the upper member 10 of the lower stack unit 30, respectively, and the gas seal portion is formed. A solid electrolyte type fuel cell in which a large number of cells are alternately stacked so as to form 81, and the single cells 32 of each stack unit are electrically connected in series via an electronic channel 23 penetrating a flat plate portion of a lower member for a gas separator. The stack is shown.
【００２２】このＳＯＦＣスタックの一つまたは複数個
を接続して箱体に収納し、ガスの流路および電気の流路
を連結して固体電解質型燃料電池が構成される。このよ
うにして構成された固体電解質型燃料電池の、例えば単
セル３２の上側のガス流路に燃料ガス７１として例えば
水素ガスが、下側のガス流路に空気または酸素ガス７２
が供給され、各単セルで電極反応が生じて電気エネルギ
が発生し、この電気エネルギが外部に取り出されて利用
される。One or more of the SOFC stacks are connected and housed in a box, and the gas flow path and the electric flow path are connected to form a solid oxide fuel cell. In the solid oxide fuel cell configured as described above, for example, hydrogen gas is supplied as the fuel gas 71 in the upper gas flow path of the single cell 32, and air or oxygen gas 72 is supplied in the lower gas flow path.
Is supplied, an electrode reaction occurs in each single cell to generate electric energy, and the electric energy is taken out and used.
【００２３】本実施例によれば、ガスセパレータを上下
に２分割した箱型構造とし、この箱型構造内に電極膜に
集電体を当接した単セルを収容してスタックユニットを
構成し、該スタックユニットを、上側スタックユニット
のガスセパレータ用下部材の電子流路を有する平板部を
下側スタックユニットのガスセパレータ用上部材の空間
部に収容された燃料側集電体上に載置するように複数積
層してＳＯＦＣスタックを組み立てたことにより、前記
スタックユニットの下部材の平板部下面と燃料側集電体
とが所定の面圧で接触するようになる。従って、スタッ
クユニット相互の電気的接触抵抗が著しく低減する。ま
た、ガスセパレータ用上部材の枠体部上面および下部材
の枠体部下面にそれぞれ二つの段差部（ハメアイ構造の
段差部）を設け、上下の段差部を嵌合させて細長いガス
シール部を形成したことにより、ガスシール性がより向
上する。According to this embodiment, the gas separator has a box-like structure in which the gas separator is divided into two parts, and a single unit in which a current collector is in contact with an electrode film is accommodated in the box-like structure to constitute a stack unit. Placing the stack unit on a fuel-side current collector accommodated in a flat portion having an electron flow path of a gas separator lower member of the upper stack unit and housed in a space of the gas separator upper member of the lower stack unit. By stacking a plurality of SOFC stacks in such a manner, the lower surface of the flat plate portion of the lower member of the stack unit comes into contact with the fuel-side current collector at a predetermined surface pressure. Therefore, the electrical contact resistance between the stack units is significantly reduced. Further, two step portions (step portions having a hammer-eye structure) are provided on the upper surface of the frame portion of the upper member for the gas separator and the lower surface of the frame portion of the lower member, respectively, and the upper and lower step portions are fitted to form an elongated gas seal portion. Due to the formation, the gas sealing property is further improved.
【００２４】なお、本実施例のＳＯＦＣスタックにおい
て、面圧は上側スタックユニットの下部材の平板部下面
と下側スタックユニットの燃料側集電体表面との当接部
にしか発生せず、確実な電気的接触を得ることができ
る。また、ガスセパレータ用上部材と下部材との接合部
およびスタックユニット相互間に形成されるガスシール
部にはガラススラリー等の接合材を介在させることが好
ましい。本実施例によれば、ガスセパレータ用上部材と
下部材とで形成される箱体内に単セルおよび集電体を収
納してスタックユニットとしたことにより、セル自身が
露出して損傷を受けることがなく機械的強度が著しく向
上する。In the SOFC stack of the present embodiment, the surface pressure is generated only at the contact portion between the lower surface of the flat portion of the lower member of the upper stack unit and the surface of the fuel collector of the lower stack unit. Electrical contact can be obtained. Further, it is preferable that a bonding material such as glass slurry is interposed in a bonding portion between the upper and lower members for a gas separator and a gas seal portion formed between the stack units. According to the present embodiment, the single cell and the current collector are housed in a box formed of the upper member and the lower member for the gas separator to form a stack unit. And the mechanical strength is significantly improved.
【００２５】本実施例において、ガスセパレータ用の上
部材および下部材の上面または下面に外周または内周に
沿って形成される段差部は、少なくとも二つである。こ
れによって、スタックユニット相互の積層部には狭い、
例えば２段の空隙部が形成され（図８参照）、１段目の
空隙部には空気が満たされ、２段目の空隙部は外気と連
通する。従って前記上部材と下部材の二つの段差部がそ
れぞれ嵌合することによって燃料と空気が別々の空間に
維持され、ガスシールの目的を達成することができる。In this embodiment, at least two steps are formed on the upper or lower surface of the upper and lower members for the gas separator along the outer or inner circumference. As a result, the stacked portions of the stack units are narrow,
For example, a two-stage gap is formed (see FIG. 8), the first-stage gap is filled with air, and the second-stage gap communicates with the outside air. Therefore, by fitting the two step portions of the upper member and the lower member respectively, the fuel and the air are maintained in separate spaces, and the purpose of the gas seal can be achieved.
【００２６】本発明において単セルとは、電池の最小構
成単位であって、平板状の固体電解質膜と、該固体電解
質膜の両面にそれぞれ積層された燃料側電極膜および酸
素側電極膜とを有する電池をいう。単セルとして、集電
体の片面に、例えば順次燃料側電極膜、固体電解質膜お
よび酸素側電極膜を積層した基板支持膜型の単セルを用
いることもできる。スタックユニットとは、ガスセパレ
ータ用上部材と下部材で構成される箱型構造体に単セル
を収容した、固体電解質型燃料電池スタックの一単位を
いう。そしてスタックユニットを多数積層した固体電解
質型燃料電池スタックを単独で、または複数接続して箱
体に収納してガスの流路および電気の流路を形成したも
のを固体電解質型燃料電池という。In the present invention, a single cell is the minimum structural unit of a battery, and comprises a flat solid electrolyte membrane and a fuel-side electrode film and an oxygen-side electrode film which are respectively laminated on both surfaces of the solid electrolyte membrane. Battery. As the single cell, for example, a substrate support film type single cell in which a fuel-side electrode film, a solid electrolyte film, and an oxygen-side electrode film are sequentially stacked on one surface of a current collector may be used. The stack unit refers to one unit of a solid oxide fuel cell stack in which a single cell is accommodated in a box-shaped structure including an upper member and a lower member for a gas separator. A solid electrolyte fuel cell stack formed by stacking a large number of stack units, alone or in plurals and housed in a box to form a gas flow path and an electric flow path is called a solid oxide fuel cell.
【００２７】本発明においてガス流路とは、固体電解質
型燃料電池の単セルの電極膜に電極活物質である燃料ガ
スまたは酸素ガスを供給する流路をいう。本発明におい
て、ガスセパレータ用上部材および下部材は、これに単
セルを組み込んだスタックユニットを多数積層して固体
電解質型燃料電池スタック（ＳＯＦＣスタック）を形成
する際、各ガス流路が直列に連通するように、異なる位
置にガス流路を設けたものが、例えば２種類用意され
る。そして２種類の上部材および下部材を用いて２種類
のスタックユニットが形成される。ガスセパレータ用上
部材、下部材およびスタックユニットは２種類に限定さ
れるものではなく、本発明の目的を達成できれば３種類
またはそれ以上であってもよい。In the present invention, the gas flow path refers to a flow path for supplying a fuel gas or an oxygen gas as an electrode active material to an electrode film of a single cell of a solid oxide fuel cell. In the present invention, when forming a solid oxide fuel cell stack (SOFC stack) by stacking a large number of stack units each incorporating a single cell into the upper member and the lower member for a gas separator, each gas flow path is connected in series. For example, two types in which gas flow paths are provided at different positions so as to communicate with each other are prepared. Then, two types of stack units are formed using two types of upper members and lower members. The upper member, the lower member, and the stack unit for the gas separator are not limited to two types, and may be three types or more as long as the object of the present invention can be achieved.
【００２８】本発明において電子流路は、ガスセパレー
タ用下部材に設けられた電子流路用の貫通孔に、内側か
ら、例えばセラミックス製電子流路材としてのＬａＣｒ
Ｏ3系ペロブスカイトの円板で蓋をし、下面側から金属
フェルトまたは、例えばＮｉ＋ＹＳＺサーメット等の導
電性固体をペレット状に焼成したものを充填することに
よって形成される。本発明においてガスセパレータなら
びに該ガスセパレータ用上部材および下部材は、平面図
上正方形または長方形であることが好ましいが、特に限
定されるものではない。In the present invention, the electron flow path is, for example, a LaCr as a ceramic electron flow path material through a through hole for the electron flow path provided in the lower member for the gas separator.
It is formed by covering with a disk of O 3 -based perovskite and filling metal felt or conductive solid such as Ni + YSZ cermet in pellet form from the lower surface side. In the present invention, the gas separator and the upper and lower members for the gas separator are preferably square or rectangular in plan view, but are not particularly limited.
【００２９】本発明において、ガスセパレータ用上部材
および下部材は、電気絶縁性物質、例えばマグネシア
（ＭｇＯ）とスピネル（ＭｇＡｌ2 Ｏ4 ）を主成分とす
る、一体成形された緻密質焼結体または薄板状の緻密質
焼結板の接合体からなることが好ましい。ＭｇＯとＭｇ
Ａｌ2 Ｏ4 の複合材料を主成分とすることにより、安価
にかつ堅牢な固体電解質型燃料電池が得られる。また、
一体成形の焼結体とすることにより、機械的強度がより
向上し、薄板状の緻密質焼結板の接合体とすることによ
り、成形性がより向上する。In the present invention, the upper member and the lower member for the gas separator are made of an integrally molded dense sintered body mainly composed of an electrically insulating material, for example, magnesia (MgO) and spinel (MgAl 2 O 4 ). Alternatively, it is preferable to be formed of a joined body of a thin dense sintered plate. MgO and Mg
By using a composite material of Al 2 O 4 as a main component, a solid electrolyte fuel cell which is inexpensive and robust can be obtained. Also,
The mechanical strength is further improved by forming the integrally molded sintered body, and the moldability is further improved by forming the joined body of the thin dense sintered plates.
【００３０】ＭｇＯとＭｇＡｌ2 Ｏ4 との混合比は重量
比で３０／７０〜７０／３０、好ましくは４０／６０〜
５０／５０である。これによって、単セル３２の固体電
解質であるＹＳＺの熱膨張係数との整合性を高めること
ができる。ＭｇＯの混合比が多すぎると熱膨張率過大と
なり、少なすぎると熱膨張率過小となる。一方、ＭｇＡ
ｌ2 Ｏ4 の混合比が多すぎると熱膨張率過小となり、少
なすぎると熱膨張率過大となる。マグネシア（ＭｇＯ）
とスピネル（ＭｇＡｌ2 Ｏ4 ）を主成分とする焼結体を
形成する際、焼結剤（第３成分）として、例えばＣａＯ
を添加することが好ましく、その添加量は、前記マグネ
シア（ＭｇＯ）とスピネル（ＭｇＡｌ2Ｏ4 ）の合計量
に対して、例えば０．５〜１重量％である。The mixing ratio of MgO and MgAl 2 O 4 is 30/70 to 70/30 by weight, preferably 40/60 to
50/50. This makes it possible to improve the consistency with the thermal expansion coefficient of YSZ, which is the solid electrolyte of the single cell 32. If the mixing ratio of MgO is too large, the coefficient of thermal expansion becomes too large, and if it is too small, the coefficient of thermal expansion becomes too small. On the other hand, MgA
If the mixing ratio of l 2 O 4 is too large, the coefficient of thermal expansion becomes too small, and if it is too small, the coefficient of thermal expansion becomes too large. Magnesia (MgO)
When forming a sintered body containing spinel and spinel (MgAl 2 O 4 ) as main components, for example, CaO is used as a sintering agent (third component).
Is preferably added, for example, 0.5 to 1% by weight based on the total amount of magnesia (MgO) and spinel (MgAl 2 O 4 ).
【００３１】本発明において、ガスセパレータ用上部材
の枠体部上面およびガスセパレータ用下部材の枠体部下
面にはその外周または内周に沿って所定間隔を隔てて二
つまたはそれ以上の段差部が設けられており、隣接する
スタックユニットのガスセパレータ用下部材および上部
材の前記段差部を嵌合することによりスタックユニット
相互間のガスシール部が形成される。In the present invention, two or more steps are formed on the upper surface of the frame of the upper member for the gas separator and the lower surface of the frame of the lower member for the gas separator at predetermined intervals along the outer or inner circumference thereof. A gas seal portion between the stack units is formed by fitting the step portions of the lower member and the upper member for the gas separator of the adjacent stack units.
【００３２】本発明において、燃料側および空気側の集
電体収納スペースへの燃料ガスおよび空気含有ガスの出
入口を正対させることなく、所定間隔だけずらすことが
好ましい。これによって、単セルの電極膜への電極活物
質の均一供給性を向上させることができる。In the present invention, it is preferable that the entrances and exits of the fuel gas and the air-containing gas to the current collector storage spaces on the fuel side and the air side are shifted by a predetermined interval without facing each other. Thereby, the uniform supply of the electrode active material to the electrode film of the single cell can be improved.
【００３３】[0033]
【発明の効果】本願の請求項１に記載の発明によれば、
ガスセパレータを上下に２分割した上部材と下部材とで
構成し、該上部材と下部材に、単セルおよび該単セルの
電極膜に当接される集電体を収容する空間部を設けたこ
とにより、単セルの露出を防止し、堅牢で信頼性と安全
性の高いスタックユニットおよび固体電解質型燃料電池
スタックが得られる。本願の請求項２に記載の発明によ
れば、上記発明の効果に加え、単セル相互間の電気的接
触抵抗をより低減することができる。According to the invention described in claim 1 of the present application,
The gas separator is composed of an upper member and a lower member, which are divided into two parts vertically, and the upper member and the lower member are provided with a space for accommodating a single cell and a current collector contacting an electrode film of the single cell. As a result, exposure of a single cell is prevented, and a robust, highly reliable and safe stack unit and a solid oxide fuel cell stack are obtained. According to the invention described in claim 2 of the present application, in addition to the effects of the above-described invention, the electric contact resistance between the single cells can be further reduced.
【００３４】本願の請求項３に記載の発明によれば、上
記発明の効果に加え、スタックユニット相互間のガスシ
ール性が向上する。本願の請求項４に記載の発明によれ
ば、上記発明の効果に加え、スタックユニット内にガス
流路を確保し、各スタックユニットのガス流路を直列に
連結することができる。According to the invention described in claim 3 of the present application, in addition to the effects of the above-described invention, the gas sealing property between the stack units is improved. According to the invention as set forth in claim 4 of the present application, in addition to the effects of the above invention, a gas flow path can be secured in the stack unit, and the gas flow paths of each stack unit can be connected in series.
【００３５】本願の請求項５に記載の発明によれば、ガ
スセパレータ用の上下部材の機械的強度が向上し、かつ
単セルの固体電解質膜である、例えばＹＳＺとの熱膨張
係数を整合させることができる。本願の請求項６および
７に記載の発明によれば、電気的接触抵抗が小さく、ガ
スシール性に優れ、堅牢で、かつ信頼性と安全性の高い
スタックユニットが得られる。本願の請求項８に記載の
発明によれば、電気的接触抵抗が小さく、ガスシール性
に優れ、そのうえ堅牢で、信頼性と安全性の高い固体電
解質型燃料電池スタックが得られる。According to the fifth aspect of the present invention, the mechanical strength of the upper and lower members for the gas separator is improved, and the thermal expansion coefficient of the upper and lower members is matched with, for example, YSZ, which is a single-cell solid electrolyte membrane. be able to. According to the inventions set forth in claims 6 and 7 of the present application, a stack unit having small electric contact resistance, excellent gas sealability, robustness, and high reliability and safety can be obtained. According to the invention described in claim 8 of the present application, a solid oxide fuel cell stack having low electrical contact resistance, excellent gas sealing properties, and being robust, highly reliable and safe can be obtained.
【図１】本発明の一実施例であるガスセパレータ用上部
材の一部切欠斜視図。FIG. 1 is a partially cutaway perspective view of an upper member for a gas separator according to one embodiment of the present invention.
【図２】本発明の一実施例であるガスセパレータ用下部
材の一部切欠斜視図。FIG. 2 is a partially cutaway perspective view of a lower member for a gas separator according to an embodiment of the present invention.
【図３】本発明の一実施例である第１スタックユニット
を示す斜視図および組立図。FIG. 3 is a perspective view and an assembly view showing a first stack unit according to an embodiment of the present invention.
【図４】本発明の一実施例である第２スタックユニット
を示す斜視図および組立図。FIG. 4 is a perspective view and an assembly view showing a second stack unit according to an embodiment of the present invention.
【図５】本発明の一実施例である第１スタックユニット
のガスセパレータ用下部材の下面を示す説明図。FIG. 5 is an explanatory view showing a lower surface of a lower member for a gas separator of a first stack unit according to an embodiment of the present invention.
【図６】本発明の一実施例である第２スタックユニット
のガスセパレータ用下部材の下面を示す説明図。FIG. 6 is an explanatory view showing a lower surface of a lower member for a gas separator of a second stack unit according to an embodiment of the present invention.
【図７】本発明の一実施例である固体電解質型燃料電池
スタックを示す説明図。FIG. 7 is an explanatory view showing a solid oxide fuel cell stack according to one embodiment of the present invention.
【図８】本発明の一実施例である固体電解質型燃料電池
スタックの一部断面図。FIG. 8 is a partial cross-sectional view of a solid oxide fuel cell stack according to an embodiment of the present invention.
１０…ガスセパレータ用上部材、１１…枠体部、１２…
段差部、１３…段差部、１４…凸状部、１５…凹状部、
１６…ガス流路孔、１７…ガス流路孔、２０…ガスセパ
レータ用下部材、２１…枠体部、２２…平板部、２３…
電子流路、２４…凸状部、２５…凹状部、２６…ガス流
路孔、２７…ガス流路孔、２８…段差部、２９…段差
部、３０…第１スタックユニット、３１…空気側集電
体、３２…単セル、３３…燃料側集電体、４０…ガスセ
パレータ用上部材、４１…枠体部、４２…段差部、４３
…段差部、４４…凸状部、４５…凹状部、４６…ガス流
路孔、４７…ガス流路孔、５０…ガスセパレータ用下部
材、５１…枠体部、５２…平板部、５３…電子流路、５
４…凸状部、５５…凹状部、５６…ガス流路孔、５７…
ガス流路孔、５８…段差部、５９…段差部、６０…第２
スタックユニット、７１…燃料ガス、７２…空気、８１
…ガスシール部。10 upper member for gas separator, 11 frame part, 12 ...
Step portion, 13: Step portion, 14: Convex portion, 15: Concave portion,
Reference numeral 16: gas passage hole, 17: gas passage hole, 20: lower member for gas separator, 21: frame portion, 22: flat plate portion, 23 ...
Electron channel, 24: convex portion, 25: concave portion, 26: gas channel hole, 27: gas channel hole, 28: stepped portion, 29: stepped portion, 30: first stack unit, 31: air side Current collector, 32 single cell, 33 fuel side current collector, 40 upper member for gas separator, 41 frame part, 42 step part, 43
... stepped portion, 44 ... convex portion, 45 ... concave portion, 46 ... gas passage hole, 47 ... gas passage hole, 50 ... lower member for gas separator, 51 ... frame body portion, 52 ... flat plate portion, 53 ... Electron flow path, 5
4 ... convex part, 55 ... concave part, 56 ... gas passage hole, 57 ...
Gas passage hole, 58: stepped portion, 59: stepped portion, 60: second
Stack unit, 71: fuel gas, 72: air, 81
... gas seal part.
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０１Ｍ 8/24 Ｈ０１Ｍ 8/24 Ｅ Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat II (Reference) H01M 8/24 H01M 8/24 E
Claims (8)
質型燃料電池の前記単セル相互間にガス流路を形成する
とともに、前記単セル相互を電気的に接続する固体電解
質型燃料電池のガスセパレータにおいて、該ガスセパレ
ータは、上下に２分割された、上部材と該上部材に接合
された下部材とからなり、前記上部材は、所定厚さの枠
体部と、該枠体部で囲まれた、単セルおよび該単セルの
電極膜に当接される集電体を収容する空間部を有し、前
記下部材は、所定厚さの枠体部と、該枠体部に囲まれた
平板部と、該平板部を貫通する複数の電子流路と、前記
枠体部と平板部とで形成される、前記単セルおよび該単
セルの電極膜に当接される集電体を収容する空間部とを
有することを特徴とする固体電解質型燃料電池のガスセ
パレータ。1. A solid electrolyte fuel cell comprising: a plurality of flat plate-shaped single cells stacked on each other; wherein a gas flow path is formed between the single cells, and the single cells are electrically connected to each other. In the gas separator, the gas separator includes an upper member and a lower member joined to the upper member, which are vertically divided into two parts, wherein the upper member has a frame body portion having a predetermined thickness, and the frame body portion. Has a space for accommodating a single cell and a current collector which is in contact with the electrode film of the single cell, wherein the lower member has a frame body having a predetermined thickness, A current collector contacting the single cell and the electrode film of the single cell formed by the enclosed flat plate portion, the plurality of electron flow paths penetrating the flat plate portion, and the frame body portion and the flat plate portion A gas separator for a solid oxide fuel cell, comprising: a space for accommodating a body.
貫通する貫通孔に充填されたＬａＣｒＯ3 系セラミック
ス製電子流路材および金属フェルトまたはサーメットか
らなることを特徴とする請求項１に記載の固体電解質型
燃料電池のガスセパレータ。2. The electron flow path is made of a LaCrO 3 ceramic electron flow path material and a metal felt or cermet filled in a through hole penetrating a flat plate portion of the lower member. 3. The gas separator for a solid oxide fuel cell according to item 1.
タ用の上または下部材であって、枠体部上面または下面
に、該枠体部の外周または内周に沿って所定間隔を隔て
て設けられた少なくとも二つの段差部を有することを特
徴とするガスセパレータ用の部材。3. The upper or lower member for a gas separator according to claim 1, wherein the upper or lower surface of the frame is spaced apart from the upper or lower surface of the frame by a predetermined distance along the outer or inner circumference of the frame. A member for a gas separator, comprising at least two step portions provided.
の段差部の一部を内側に突出させて凸状部を設け、該凸
状部に対向する枠体部に前記凸状部に相応する凹状部を
設け、前記凸状部、凹状部および／またはその隣接部に
枠体部または平板部を貫通するガス流路孔を設けたこと
を特徴とする請求項３に記載のガスセパレータ用の部
材。4. A projecting portion is provided by projecting a part of the upper surface of the frame portion or a part of a step portion on the upper surface of the frame portion inward, and the projecting portion is formed on the frame portion facing the projecting portion. The concave portion corresponding to the portion is provided, and the convex portion, the concave portion and / or an adjacent portion thereof are provided with a gas passage hole penetrating a frame portion or a flat plate portion. Material for gas separator.
レータ用の部材であって、マグネシア（ＭｇＯ）とスピ
ネル（ＭｇＡｌ2 Ｏ4 ）を主成分とする、一体成形され
た緻密質焼結体または薄板状の緻密質焼結板の接合体で
あって、前記ＭｇＯとＭｇＡｌ2 Ｏ4 の混合比が重量比
で３０／７０〜７０／３０であることを特徴とするガス
セパレータ用の部材。5. A member for a gas separator according to claim 1, wherein said member comprises magnesia (MgO) and spinel (MgAl 2 O 4 ) as main components. What is claimed is: 1. A bonded body of a compact or thin dense sintered plate, wherein the mixing ratio of MgO and MgAl 2 O 4 is 30/70 to 70/30 by weight. Element.
凸状部を設け、該凸状部に対向する枠体部に前記凸状部
に相応する凹状部を設け、前記凸状部および該凸状部に
隣接する平板部に枠体部または平板部を貫通するガス流
路孔を設けた請求項４に記載のガスセパレータ用の下部
材と、枠体部上面の段差部の一部を内側に突出させて凸
状部を設け、該凸状部に対向する段差部に前記凸状部に
相応する凹状部を設け、前記凸状部および凹状部に枠体
部を貫通するガス流路孔を設けた請求項４に記載のガス
セパレータ用の上部材と、前記ガスセパレータ用の下部
材の空間部に収容された空気側集電体と、該空気側集電
体に空気極膜が当接するように配置された単セルと、該
単セルの上面外周部の固体電解質膜および前記下部材の
枠体部上面に枠体部下面が当接するように接合された、
前記ガスセパレータ用上部材と、該ガスセパレータ用上
部材の枠体部で囲まれた空間部に収容され、前記単セル
の燃料極膜に当接するように配置された燃料側集電体と
を有し、前記上部材の凹状部に設けられたガス流路孔と
下部材の凸状部に設けられたガス流路孔を連通させたこ
とを特徴とするスタックユニット。6. A convex portion is provided by projecting a part of the upper surface of the frame portion inward, and a concave portion corresponding to the convex portion is provided on the frame portion facing the convex portion. 5. The lower member for a gas separator according to claim 4, wherein a gas passage hole penetrating through the frame portion or the flat plate portion is provided in the flat portion adjacent to the convex portion and the convex portion. Is provided to project inward, a convex portion is provided, and a step portion facing the convex portion is provided with a concave portion corresponding to the convex portion, and the frame portion penetrates through the convex portion and the concave portion. The upper member for a gas separator according to claim 4, wherein a gas passage hole is provided, an air-side current collector housed in a space of the lower member for the gas separator, and the air-side current collector. A single cell arranged such that the air electrode membrane is in contact with the solid electrolyte membrane and an upper surface of the lower surface of the single cell; Joined so that the lower surfaces are in contact,
The gas separator upper member, and a fuel-side current collector that is housed in a space surrounded by the frame portion of the gas separator upper member and that is arranged to contact the fuel electrode membrane of the single cell. A stack unit comprising: a gas passage hole provided in a concave portion of the upper member and a gas passage hole provided in a convex portion of the lower member.
凸状部を設け、該凸状部に対向する枠体部に前記凸状部
に相応する凹状部を設け、該凹状部および該凹状部に隣
接する枠体部に該枠体部または平板部を貫通するガス流
路孔を設けた請求項４に記載のガスセパレータ用下部材
と、枠体部上面の段差部の一部を内側に突出させて凸状
部を設け、該凸状部に対向する段差部に前記凸状部に相
応する凹状部を設け、前記凸状部に隣接する枠体部およ
び凹状部に隣接する枠体部に、枠体部を貫通するガス流
路孔を設けた請求項４に記載のガスセパレータ用上部材
と、前記ガスセパレータ用下部材の空間部に収容された
空気側集電体と、該空気側集電体に空気極膜が当接する
ように配置された単セルと、該単セルの上面外周部の固
体電解質膜および前記下部材の枠体部上面に枠体部下面
が当接するように接合された、前記ガスセパレータ用上
部材と、該上部材の枠体部で囲まれた空間部に収容さ
れ、前記単セルの燃料極膜に当接するように配置された
燃料側集電体とを有し、前記上部材の凸状部に隣接して
設けられたガス流路孔と下部材の凹状部に隣接して設け
られたガス流路孔を連通させたことを特徴とするスタッ
クユニット。7. A convex portion is provided by projecting a part of the upper surface of the frame portion inward, and a concave portion corresponding to the convex portion is provided on the frame portion facing the convex portion. 5. The lower member for a gas separator according to claim 4, wherein a gas passage hole penetrating through the frame portion or the flat plate portion is provided in the frame portion adjacent to the portion and the concave portion. A convex portion is provided by projecting a part inward, a concave portion corresponding to the convex portion is provided in a step portion facing the convex portion, and a frame portion and a concave portion adjacent to the convex portion are provided. 5. The gas collector according to claim 4, wherein adjacent frame portions are provided with gas flow holes penetrating through the frame portion. Body, a single cell disposed such that an air electrode membrane is in contact with the air-side current collector, and a solid electrolyte membrane and a front surface outer peripheral portion of the upper surface of the single cell. The upper member for a gas separator, which is joined so that the lower surface of the frame portion abuts on the upper surface of the frame portion of the lower member, and the single cell accommodated in a space surrounded by the frame portion of the upper member, A fuel-side current collector disposed so as to abut the fuel electrode membrane, and adjacent to a gas flow hole provided adjacent to the convex portion of the upper member and a concave portion of the lower member. A stack unit wherein the provided gas passage holes are communicated.
と、請求項７に記載のスタックユニットを、上側スタッ
クユニットのガスセパレータ用下部材の平板部下面で下
側スタックユニットの燃料側集電体の上面を押圧するよ
うに、かつ上側スタックユニットのガスセパレータ用下
部材の枠体部下面に設けられた少なくとも二つの段差部
がそれぞれ下側スタックユニットのガスセパレータ用上
部材の枠体部上面に設けられた少なくとも二つの段差部
に嵌合してガスシール部を形成するように交互に多数積
層し、各スタックユニットの単セルを前記ガスセパレー
タ用下部材の平板部を貫通する電子流路を介して電気的
に直列に接続したことを特徴とする固体電解質型燃料電
池スタック。8. A fuel collector for the stack unit according to claim 6 and the stack unit according to claim 7 on the lower surface of the plate portion of the lower member for the gas separator of the upper stack unit. To press the upper surface of the upper stack unit, and at least two step portions provided on the lower surface of the frame member of the lower member for the gas separator of the upper stack unit are respectively formed on the upper surface of the frame member of the upper member for the gas separator of the lower stack unit. A large number of layers are alternately stacked so as to fit into at least two step portions provided to form a gas seal portion, and an electronic flow path penetrating a single cell of each stack unit through a flat plate portion of the lower member for the gas separator. A solid oxide fuel cell stack, wherein the fuel cell stack is electrically connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001063772A JP2002270200A (en) | 2001-03-07 | 2001-03-07 | Gas separator for solid oxide fuel cell, member thereof, stack unit using the same, and solid oxide fuel cell stack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001063772A JP2002270200A (en) | 2001-03-07 | 2001-03-07 | Gas separator for solid oxide fuel cell, member thereof, stack unit using the same, and solid oxide fuel cell stack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002270200A true JP2002270200A (en) | 2002-09-20 |
Family
ID=18922705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001063772A Pending JP2002270200A (en) | 2001-03-07 | 2001-03-07 | Gas separator for solid oxide fuel cell, member thereof, stack unit using the same, and solid oxide fuel cell stack |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002270200A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005528742A (en) * | 2002-05-09 | 2005-09-22 | 本田技研工業株式会社 | Fuel cell and separator thereof |
| JP2006004678A (en) * | 2004-06-15 | 2006-01-05 | Ngk Spark Plug Co Ltd | Solid electrolyte type fuel cell |
| JP2008041303A (en) * | 2006-08-02 | 2008-02-21 | Nippon Telegr & Teleph Corp <Ntt> | Flat type solid oxide fuel cell separator |
| WO2008044429A1 (en) * | 2006-10-05 | 2008-04-17 | Murata Manufacturing Co., Ltd. | Solid electrolyte fuel battery support structure and solid electrolyte fuel battery module having same |
| CN100449846C (en) * | 2007-03-08 | 2009-01-07 | 上海交通大学 | Detachable flat intermediate temperature solid oxide fuel cell stack |
| US7662503B2 (en) | 2003-11-10 | 2010-02-16 | Toyota Jidosha Kabushiki Kaisha | Fuel cell, disassembly method thereof, and separators used therein |
| JP2013008687A (en) * | 2012-08-24 | 2013-01-10 | Sharp Corp | Fuel cell stack |
| WO2013012058A1 (en) * | 2011-07-21 | 2013-01-24 | 株式会社村田製作所 | Electrical connection material for solid oxide fuel cell, joining material for solid oxide fuel cell, and solid oxide fuel cell |
| US11031601B2 (en) | 2018-05-23 | 2021-06-08 | Panasonic Intellectual Property Management Co., Ltd. | Battery and cell stack |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62208558A (en) * | 1986-03-10 | 1987-09-12 | Ishikawajima Harima Heavy Ind Co Ltd | Separator for fuel cells |
| JPH07296829A (en) * | 1994-04-27 | 1995-11-10 | Tokyo Gas Co Ltd | Supporting membrane type solid electrolyte fuel cell |
| JPH08171925A (en) * | 1994-12-19 | 1996-07-02 | Mitsubishi Electric Corp | Solid high polymer type fuel cell |
| JP2000058081A (en) * | 1998-08-06 | 2000-02-25 | Mitsui Eng & Shipbuild Co Ltd | Gas separator for solid oxide fuel cell and solid oxide fuel cell using the same |
| JP2000306590A (en) * | 1999-04-20 | 2000-11-02 | Tokyo Gas Co Ltd | Solid electrolyte fuel cell |
-
2001
- 2001-03-07 JP JP2001063772A patent/JP2002270200A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62208558A (en) * | 1986-03-10 | 1987-09-12 | Ishikawajima Harima Heavy Ind Co Ltd | Separator for fuel cells |
| JPH07296829A (en) * | 1994-04-27 | 1995-11-10 | Tokyo Gas Co Ltd | Supporting membrane type solid electrolyte fuel cell |
| JPH08171925A (en) * | 1994-12-19 | 1996-07-02 | Mitsubishi Electric Corp | Solid high polymer type fuel cell |
| JP2000058081A (en) * | 1998-08-06 | 2000-02-25 | Mitsui Eng & Shipbuild Co Ltd | Gas separator for solid oxide fuel cell and solid oxide fuel cell using the same |
| JP2000306590A (en) * | 1999-04-20 | 2000-11-02 | Tokyo Gas Co Ltd | Solid electrolyte fuel cell |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005528742A (en) * | 2002-05-09 | 2005-09-22 | 本田技研工業株式会社 | Fuel cell and separator thereof |
| US7662503B2 (en) | 2003-11-10 | 2010-02-16 | Toyota Jidosha Kabushiki Kaisha | Fuel cell, disassembly method thereof, and separators used therein |
| JP2006004678A (en) * | 2004-06-15 | 2006-01-05 | Ngk Spark Plug Co Ltd | Solid electrolyte type fuel cell |
| JP2008041303A (en) * | 2006-08-02 | 2008-02-21 | Nippon Telegr & Teleph Corp <Ntt> | Flat type solid oxide fuel cell separator |
| WO2008044429A1 (en) * | 2006-10-05 | 2008-04-17 | Murata Manufacturing Co., Ltd. | Solid electrolyte fuel battery support structure and solid electrolyte fuel battery module having same |
| JP5077238B2 (en) * | 2006-10-05 | 2012-11-21 | 株式会社村田製作所 | Solid oxide fuel cell support structure and solid oxide fuel cell module including the same |
| CN100449846C (en) * | 2007-03-08 | 2009-01-07 | 上海交通大学 | Detachable flat intermediate temperature solid oxide fuel cell stack |
| WO2013012058A1 (en) * | 2011-07-21 | 2013-01-24 | 株式会社村田製作所 | Electrical connection material for solid oxide fuel cell, joining material for solid oxide fuel cell, and solid oxide fuel cell |
| JPWO2013012058A1 (en) * | 2011-07-21 | 2015-02-23 | 株式会社村田製作所 | Electrical connection material for solid oxide fuel cell, bonding material for solid oxide fuel cell, and solid oxide fuel cell |
| JP2013008687A (en) * | 2012-08-24 | 2013-01-10 | Sharp Corp | Fuel cell stack |
| US11031601B2 (en) | 2018-05-23 | 2021-06-08 | Panasonic Intellectual Property Management Co., Ltd. | Battery and cell stack |
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