JPH11149934A - Electrolytic cell - Google Patents
Electrolytic cellInfo
- Publication number
- JPH11149934A JPH11149934A JP9316698A JP31669897A JPH11149934A JP H11149934 A JPH11149934 A JP H11149934A JP 9316698 A JP9316698 A JP 9316698A JP 31669897 A JP31669897 A JP 31669897A JP H11149934 A JPH11149934 A JP H11149934A
- Authority
- JP
- Japan
- Prior art keywords
- single element
- electrolyte
- electrolytic
- electrolytic cell
- gas
- 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
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Fuel Cell (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、燃料電池に用いる
電解セルに関し、電解ガスの流れ方向に沿い下流側に位
置する単素子の損傷を防止するように工夫したものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolysis cell for use in a fuel cell and is designed to prevent damage to a single element located downstream in the flow direction of an electrolysis gas.
【０００２】[0002]
【従来の技術】燃料電池に用いる電解セルのうち、円筒
型電解セルの従来の一例を、図２に示す。同図に示すよ
うに、この円筒型電解セルは、３個の円筒型の単素子Ｓ
１，Ｓ２，Ｓ３を軸方向に並べて接続した構成となって
いる。各単素子Ｓ１〜Ｓ３は、円筒状の電解質１の内周
面にカソード２を形成し、電解質１の外周面にアノード
３を形成している。そして、電子導電性を有するインタ
ーコネクター４を介して、各単素子Ｓ１〜Ｓ３が軸方向
に機械的に接続されると共に、各素子Ｓ１〜Ｓ３が電気
的に直列に接続される。2. Description of the Related Art FIG. 2 shows a conventional example of a cylindrical electrolytic cell among electrolytic cells used for a fuel cell. As shown in the figure, this cylindrical electrolytic cell has three cylindrical single elements S.
1, S2, and S3 are arranged side by side in the axial direction and connected. In each of the single elements S1 to S3, the cathode 2 is formed on the inner peripheral surface of the cylindrical electrolyte 1, and the anode 3 is formed on the outer peripheral surface of the electrolyte 1. The individual elements S1 to S3 are mechanically connected in the axial direction via the interconnector 4 having electronic conductivity, and the elements S1 to S3 are electrically connected in series.
【０００３】電気的に直列接続されている状態を更に詳
述すると、単素子Ｓ１のカソード２と単素子Ｓ２のアノ
ード３とがインターコネクター４により電気的に接続さ
れ、単素子Ｓ２のカソード２と単素子Ｓ３のアノード３
とがインターコネクター４により電気的に接続されてい
る。The state of being electrically connected in series will be described in more detail. The cathode 2 of the single element S1 and the anode 3 of the single element S2 are electrically connected by an interconnector 4, and the cathode 2 of the single element S2 is connected to the cathode 2 of the single element S2. Anode 3 of single element S3
Are electrically connected by the interconnector 4.
【０００４】そして、電解する電解ガスＧが、上流側の
単素子Ｓ１側から供給されて、単素子Ｓ１〜Ｓ３の内部
を流通して、単素子Ｓ３側から排出される。つまり、電
解ガスＧは、電解セルの内部を、その軸方向に沿い流通
する。[0004] Electrolytic gas G to be electrolyzed is supplied from the upstream single element S1 side, flows inside the single elements S1 to S3, and is discharged from the single element S3 side. That is, the electrolytic gas G flows inside the electrolytic cell along the axial direction.
【０００５】上述した従来の電解セルでは、上流側の単
素子Ｓ１と、中流の単素子Ｓ２と、下流側の単素子Ｓ３
の、各電解質１の軸方向長さ（電解ガスＧの流れ方向に
沿う長さ）は、同一となっている。In the conventional electrolytic cell described above, the upstream single element S1, the middle single element S2, and the downstream single element S3
The length of each electrolyte 1 in the axial direction (the length along the flow direction of the electrolytic gas G) is the same.
【０００６】[0006]
【発明が解決しようとする課題】ところで、電解セルの
内部を流通する電解ガスＧの濃度は、電解セルの内部を
流通して電解されていくことにより順次低下していき、
上流側の位置に比べて下流側の位置で低い。このため、
単素子Ｓ１〜Ｓ３のうち、電解ガスＧの流れ方向に沿
い下流側に位置する単素子ほど、付加される電圧が増加
し（カソード２に付加される電圧が増加し）、その結
果、最下流側の単素子Ｓ３の電解質１に付加される電流
密度が高くなり、最下流側の単素子Ｓ３の電解質１に損
傷が生じる恐れがあった。By the way, the concentration of the electrolytic gas G flowing through the inside of the electrolytic cell gradually decreases as it flows through the inside of the electrolytic cell and is electrolyzed.
It is lower at the downstream position than at the upstream position. For this reason,
Among the single elements S1 to S3, the single element located on the downstream side along the flow direction of the electrolytic gas G increases the applied voltage (the voltage applied to the cathode 2 increases). The current density applied to the electrolyte 1 of the single element S3 on the side becomes high, and the electrolyte 1 of the single element S3 on the most downstream side may be damaged.
【０００７】本発明は、上記従来技術に鑑み、電解ガス
の流れ方向に沿う下流側に位置する単素子に付加される
全体の電圧の増加を抑え、下流側の単素子の電解質に付
加される電流密度を低くして、下流側の単素子の電解質
の損傷を防止することのできる電解セルを提供すること
を目的とする。In view of the above prior art, the present invention suppresses an increase in the overall voltage applied to a single element located downstream in the flow direction of the electrolytic gas, and is added to the electrolyte of the single element downstream. It is an object of the present invention to provide an electrolytic cell capable of reducing the current density and preventing the electrolyte of the downstream single element from being damaged.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決する本発
明の構成は、電解質をアノードとカソードで挟んで形成
した単素子を、電解する電解ガスの流れ方向に沿い複数
個配列し且つ各単素子を電気的に直列に接続してなる電
解セルにおいて、電解ガスの流れ方向に沿う上流側の単
素子の電解質よりも、下流側の単素子の電解質の方が、
電解ガスの流れ方向に沿う長さが順次長く構成されてい
ることを特徴とする。According to the structure of the present invention which solves the above-mentioned problems, a plurality of single elements formed by sandwiching an electrolyte between an anode and a cathode are arranged along the flow direction of the electrolytic gas to be electrolyzed, and In an electrolytic cell in which the elements are electrically connected in series, the electrolyte of the downstream single element is more than the electrolyte of the upstream single element along the flow direction of the electrolytic gas,
The length along the flow direction of the electrolytic gas is sequentially increased.
【０００９】[0009]
【発明の実施の形態】以下に本発明の実施の形態を図面
に基づき詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１０】図１は、本発明の実施の形態にかかる円筒
型電解セルを示している。同図に示すように、この円筒
型電解セルは、３個の円筒型の単素子Ｓ１０，Ｓ２０，
Ｓ３０を軸方向に並べて接続した構成となっている。各
単素子Ｓ１０，Ｓ２０，Ｓ３０は、円筒状の電解質１
１，２１，３１の内周面にカソード１２，２２，３２を
形成し、電解質１１，２１，３１の外周面にアノード１
３，２３，３３を形成している。そして、電子導電性を
有するインターコネクター１４，２４，３４を介して、
各単素子Ｓ１０，Ｓ２０，Ｓ３０が軸方向に機械的に接
続されると共に、各素子Ｓ１０，Ｓ２０，Ｓ３０が電気
的に直列に接続される。FIG. 1 shows a cylindrical electrolytic cell according to an embodiment of the present invention. As shown in the figure, this cylindrical electrolytic cell has three cylindrical single elements S10, S20,
S30 is arranged in the axial direction and connected. Each single element S10, S20, S30 is a cylindrical electrolyte 1
The cathodes 12, 22, 32 are formed on the inner peripheral surfaces of the electrodes 1, 21, 31, and the anode 1 is formed on the outer peripheral surfaces of the electrolytes 11, 21, 31.
3, 23, 33 are formed. Then, via interconnectors 14, 24, 34 having electronic conductivity,
The individual elements S10, S20, S30 are mechanically connected in the axial direction, and the elements S10, S20, S30 are electrically connected in series.
【００１１】電気的に直列接続されている状態を更に詳
述すると、単素子Ｓ１０のカソード１２と単素子Ｓ２０
のアノード２３とがインターコネクター１４により電気
的に接続され、単素子Ｓ２０のカソード２２と単素子Ｓ
３０のアノード３３とがインターコネクター２４により
電気的に接続されている。The state of being electrically connected in series will be described in more detail. The cathode 12 of the single element S10 and the single element S20
Of the single element S20 and the single element S20 are electrically connected to each other by the interconnector 14.
The 30 anodes 33 are electrically connected by the interconnector 24.
【００１２】そして、電解する電解ガスＧが、上流側の
単素子Ｓ１０側から供給されて、単素子Ｓ１０，Ｓ２
０，Ｓ３０の内部を流通して、単素子Ｓ３０側から排出
される。つまり、電解ガスＧは、電解セルの内部を、そ
の軸方向に沿い流通する。Then, the electrolytic gas G to be electrolyzed is supplied from the upstream single element S10 side, and the single elements S10, S2
0 and S30, and are discharged from the single element S30 side. That is, the electrolytic gas G flows inside the electrolytic cell along the axial direction.
【００１３】本実施の形態の電解セルでは、上流側の単
素子Ｓ１０の電解質１１と、中流の単素子Ｓ２０の電解
質２１と、下流側の単素子Ｓ３０の電解質３１の軸方向
長さ（電解ガスＧの流れ方向に沿う長さ）は、下流側に
位置するものほど順次長くなるように構成されている。
つまり、電解ガスＧの流れ方向に沿う長さは、電解質１
１よりも電解質２１の方が長く、電解質２１よりも電解
質３１の方が長くなるように構成されている。In the electrolytic cell of this embodiment, the axial lengths of the electrolyte 11 of the single element S10 on the upstream side, the electrolyte 21 of the single element S20 in the middle stream, and the electrolyte 31 of the single element S30 on the downstream side (electrolytic gas) The length along the flow direction of G) is configured to be gradually longer as the position is more downstream.
That is, the length along the flow direction of the electrolytic gas G is the length of the electrolyte 1.
The configuration is such that the electrolyte 21 is longer than 1 and the electrolyte 31 is longer than the electrolyte 21.
【００１４】一方、電解セルの内部を流通する電解ガス
Ｇの濃度は、電解セルの内部を流通して電解されていく
ことにより順次低下していき、上流側の位置に比べて下
流側の位置で低い。しかし、本実施の形態では、電解ガ
スＧの流れ方向に沿う長さは、電解質１１よりも電解質
２１の方が長く、電解質２１よりも電解質３１の方が長
くなるように構成されている。このため、最下流側の単
素子３０の反応面積が増加し、電解質３１に付加される
電流密度が低下し、単素子３０に付加される全体の電圧
の増加を抑え、電解質３１の損傷を防止することができ
る。On the other hand, the concentration of the electrolytic gas G flowing through the inside of the electrolytic cell gradually decreases as the electrolytic gas G flows through the inside of the electrolytic cell and is electrolyzed. At low. However, in the present embodiment, the length along the flow direction of the electrolytic gas G is configured such that the electrolyte 21 is longer than the electrolyte 11 and the electrolyte 31 is longer than the electrolyte 21. For this reason, the reaction area of the single element 30 on the most downstream side increases, the current density applied to the electrolyte 31 decreases, the increase in the overall voltage applied to the single element 30 is suppressed, and damage to the electrolyte 31 is prevented. can do.
【００１５】[0015]
【発明の効果】以上実施の形態と共に具体的に説明した
ように、本発明では、電解質をアノードとカソードで挟
んで形成した単素子を、電解する電解ガスの流れ方向に
沿い複数個配列し且つ各単素子を電気的に直列に接続し
てなる電解セルにおいて、電解ガスの流れ方向に沿う上
流側の単素子の電解質よりも、下流側の単素子の電解質
の方が、電解ガスの流れ方向に沿う長さが順次長く構成
されている。As described above in detail with the embodiments, in the present invention, a plurality of single elements formed by sandwiching an electrolyte between an anode and a cathode are arranged along the flow direction of the electrolytic gas to be electrolyzed. In an electrolysis cell in which each single element is electrically connected in series, the electrolyte of the downstream single element is more in the flow direction of the electrolytic gas than the electrolyte of the upstream single element along the flow direction of the electrolysis gas. Are configured to be sequentially longer.
【００１６】このため、最下流側の単素子の反応面積が
増加し、最下流側の電解質に付加される電流密度が低下
し、最下流側の電解質の損傷を防止することができる。As a result, the reaction area of the single element on the most downstream side is increased, the current density applied to the electrolyte on the most downstream side is reduced, and the electrolyte on the most downstream side can be prevented from being damaged.
【図１】本発明の実施の形態にかかる電解セルを示す断
面図。FIG. 1 is a cross-sectional view showing an electrolytic cell according to an embodiment of the present invention.
【図２】従来の電解セルを示す断面図。FIG. 2 is a sectional view showing a conventional electrolytic cell.
Ｓ１〜Ｓ３，Ｓ１０〜Ｓ３０ 単素子 Ｇ 電解ガス １，１１，２１，３１ 電解質 ２，１２，２２，３２ カソード ３，１３，２３，３３ アノード ４，１４，２４，３４ インターコネクター S1 to S3, S10 to S30 Single element G Electrolytic gas 1, 11, 21, 31 Electrolyte 2, 12, 22, 32 Cathode 3, 13, 23, 33 Anode 4, 14, 24, 34 Interconnector
Claims (1)
成した単素子を、電解する電解ガスの流れ方向に沿い複
数個配列し且つ各単素子を電気的に直列に接続してなる
電解セルにおいて、 電解ガスの流れ方向に沿う上流側の単素子の電解質より
も、下流側の単素子の電解質の方が、電解ガスの流れ方
向に沿う長さが順次長く構成されていることを特徴とす
る電解セル。1. An electrolytic cell comprising: a plurality of single elements each having an electrolyte sandwiched between an anode and a cathode arranged in a flow direction of an electrolytic gas to be electrolyzed; and each of the single elements is electrically connected in series. Electrolysis characterized in that the length of the electrolyte of the downstream single element along the flow direction of the electrolytic gas is sequentially longer than the electrolyte of the upstream single element along the flow direction of the electrolytic gas. cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31669897A JP3367881B2 (en) | 1997-11-18 | 1997-11-18 | Electrolysis cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31669897A JP3367881B2 (en) | 1997-11-18 | 1997-11-18 | Electrolysis cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11149934A true JPH11149934A (en) | 1999-06-02 |
| JP3367881B2 JP3367881B2 (en) | 2003-01-20 |
Family
ID=18079912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31669897A Expired - Fee Related JP3367881B2 (en) | 1997-11-18 | 1997-11-18 | Electrolysis cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3367881B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004082058A1 (en) | 2003-03-13 | 2004-09-23 | Tokyo Gas Company Limited | Solid-oxide shaped fuel cell module |
| JP2007188793A (en) * | 2006-01-13 | 2007-07-26 | Mitsubishi Heavy Ind Ltd | Tubular and laterally striped fuel cell |
| JP2009187910A (en) * | 2008-02-08 | 2009-08-20 | National Institute Of Advanced Industrial & Technology | Solid oxide fuel cell stack having channel cell accumulation structure, and its manufacturing method |
| JP2010257853A (en) * | 2009-04-28 | 2010-11-11 | Kikusui Chemical Industries Co Ltd | Unit cell of fuel cell, unit cell assembly fuel cell, and method for manufacturing the same |
| JP2013175306A (en) * | 2012-02-23 | 2013-09-05 | Mitsubishi Heavy Ind Ltd | Solid oxide fuel battery |
| JP2016507880A (en) * | 2013-02-25 | 2016-03-10 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ | Cylindrical solid oxide battery |
| JP6267389B1 (en) * | 2016-08-30 | 2018-01-24 | 日本碍子株式会社 | Electrochemical cell stack |
-
1997
- 1997-11-18 JP JP31669897A patent/JP3367881B2/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4541296B2 (en) * | 2003-03-13 | 2010-09-08 | 東京瓦斯株式会社 | Solid oxide fuel cell module |
| EP1603183A1 (en) * | 2003-03-13 | 2005-12-07 | Tokyo Gas Company Limited | Solid-oxide shaped fuel cell module |
| JPWO2004082058A1 (en) * | 2003-03-13 | 2006-06-15 | 東京瓦斯株式会社 | Solid oxide fuel cell module |
| WO2004082058A1 (en) | 2003-03-13 | 2004-09-23 | Tokyo Gas Company Limited | Solid-oxide shaped fuel cell module |
| EP1603183A4 (en) * | 2003-03-13 | 2008-03-12 | Tokyo Gas Co Ltd | Solid-oxide shaped fuel cell module |
| US7989113B2 (en) | 2003-03-13 | 2011-08-02 | Tokyo Gas Co., Ltd. | Solid-oxide shaped fuel cell module |
| JP2007188793A (en) * | 2006-01-13 | 2007-07-26 | Mitsubishi Heavy Ind Ltd | Tubular and laterally striped fuel cell |
| JP2009187910A (en) * | 2008-02-08 | 2009-08-20 | National Institute Of Advanced Industrial & Technology | Solid oxide fuel cell stack having channel cell accumulation structure, and its manufacturing method |
| JP2010257853A (en) * | 2009-04-28 | 2010-11-11 | Kikusui Chemical Industries Co Ltd | Unit cell of fuel cell, unit cell assembly fuel cell, and method for manufacturing the same |
| JP2013175306A (en) * | 2012-02-23 | 2013-09-05 | Mitsubishi Heavy Ind Ltd | Solid oxide fuel battery |
| JP2016507880A (en) * | 2013-02-25 | 2016-03-10 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ | Cylindrical solid oxide battery |
| JP6267389B1 (en) * | 2016-08-30 | 2018-01-24 | 日本碍子株式会社 | Electrochemical cell stack |
| JP2018037402A (en) * | 2016-08-30 | 2018-03-08 | 日本碍子株式会社 | Electrochemical cell stack |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3367881B2 (en) | 2003-01-20 |
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