JPH0624124B2 - Fuel cell - Google Patents
Fuel cellInfo
- Publication number
- JPH0624124B2 JPH0624124B2 JP61261866A JP26186686A JPH0624124B2 JP H0624124 B2 JPH0624124 B2 JP H0624124B2 JP 61261866 A JP61261866 A JP 61261866A JP 26186686 A JP26186686 A JP 26186686A JP H0624124 B2 JPH0624124 B2 JP H0624124B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- anode
- fuel cell
- gas passage
- cathode
- 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.)
- Expired - Fee Related
Links
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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
-
- 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
- H01M8/023—Porous and characterised by the material
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Fuel Cell (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は燃料電池に関するものである。TECHNICAL FIELD The present invention relates to a fuel cell.
〔従来の技術〕 従来の波板セパレータは米国特許4,115,627 号公報に記
載されているように、多孔質基体を一体成形した構造を
とつているので、溶融炭酸塩型燃料電池の電極としてみ
た場合に、電極のクリープ等による気孔率の減少，ガス
通路の変形および電解質板と電極との接触面圧の低下な
どの問題がある。[Prior Art] Since a conventional corrugated sheet separator has a structure in which a porous substrate is integrally molded as described in U.S. Pat. No. 4,115,627, it can be used as an electrode of a molten carbonate fuel cell. However, there are problems such as reduction of porosity due to electrode creep, deformation of gas passage, and reduction of contact surface pressure between the electrolyte plate and the electrode.
上記従来技術は電極の長時間の発電によるクリープ変形
について配慮されておらず、電極の気孔率の変化，ガス
流路の変形，電解質板への接触面圧の低下などの問題が
ある。The above-mentioned prior art does not consider creep deformation due to long-term power generation of the electrode, and has problems such as changes in the porosity of the electrode, deformation of the gas flow path, and reduction of the contact surface pressure with the electrolyte plate.
本発明は以上の点に鑑みなされたものであり、電極の気
孔率の変化、ガス通路の変形および接触面圧の減少を防
止することを可能とした燃料電池を提供することを目的
とするものである。The present invention has been made in view of the above points, and an object thereof is to provide a fuel cell capable of preventing a change in porosity of an electrode, a deformation of a gas passage, and a decrease in contact surface pressure. Is.
上記目的は、リブ付アノード電極、カソード電極の凹凸
部に電極部材より高剛性で、かつ凹凸部の面に密着する
ように形成した多孔質波板を設け前記電極と一体にする
とともに、該多孔質波板の反電解質板側凹部を夫々前記
アノードガス通路、カソードガス通路としたことにより
達成される。The above-mentioned object is to provide a porous corrugated plate, which has higher rigidity than the electrode member and is formed so as to be in close contact with the surface of the concave and convex portion, on the concave and convex portions of the ribbed anode electrode and cathode electrode, and to integrate the porous corrugated plate with the electrode. This is achieved by using the concave portions of the corrugated plate on the side of the anti-electrolyte plate as the anode gas passage and the cathode gas passage, respectively.
電極の凹凸部に電極部材より高剛性で、かつ凹凸部の面
に密着するように形成した多孔質波板を設け電極と一体
にすることにより、電極の凹凸部、特に凸部に加わえら
れる局部的な圧力を均等に分散するようになる。この結
果、電極の形くずれが防止され、クリープ量の増加およ
び気孔率、接触面圧の減少が防止される。また、多孔質
波板の反電解質板側凹部をアノードガス通路、カソード
ガス通路としたので、ガス通路の変形が防止される。By providing a porous corrugated plate that has higher rigidity than the electrode member and is formed so as to be in close contact with the surface of the uneven portion on the uneven portion of the electrode and is integrated with the electrode, it can be added to the uneven portion of the electrode, particularly the convex portion. Local pressure will be evenly distributed. As a result, the shape of the electrode is prevented from being deformed, and the increase in creep amount and the decrease in porosity and contact surface pressure are prevented. Further, since the concave portion of the porous corrugated plate on the side of the anti-electrolyte plate is used as the anode gas passage and the cathode gas passage, the deformation of the gas passage is prevented.
以下、図示した実施例に基づき本発明を説明する。第１
図および第２図には本発明の一実施例が示されている。
同図に示されているように燃料電池は電解質板１をはさ
んで積層されるセパレータ２を備えており、セパレータ
２は対向配置され、かつアノード，カソードガス通路
３，４を有するリブ付アノード電極５，リブ付カソード
電極６を備えている。なお第２図において７は端板であ
る。The present invention will be described below based on the illustrated embodiments. First
An embodiment of the present invention is shown in FIGS.
As shown in the figure, the fuel cell includes a separator 2 that is laminated with an electrolyte plate 1 in between, and the separators 2 are arranged so as to face each other and have a rib and an anode having cathode gas passages 3 and 4. An electrode 5 and a ribbed cathode electrode 6 are provided. In FIG. 2, 7 is an end plate.
このように構成された燃料電池で電解質板１は、電池反
応に必要な炭酸リチウム（Ｌi2ＣＯ3），炭酸カリウム
（Ｋ2ＣＯ3）を溶融した状態（６５０℃）で保持する役
目を持つ多孔質の絶縁体である。リブ付アノード電極５
およびリブ付カソード電極６は、反応ガスが電解質と反
応する場を提供する触媒の役割を果している。セパレー
タ２は燃料電池を複数セルに積層化した際に各セルへの
ガスを分配する役割を果している。アノードおよびカソ
ードガス通路３，４はリブ付アノード，カソード電極
５，６へのガスの供給および反応後のガスの排気の役割
を持つている。積層電池は発電時650 ℃の高温に保た
れ、各セル間の接触抵抗およびガスのリークを防止する
ために２から３kg／cm2程度の面圧で締付けられる。反
応ガスは内部マニホールドまたは外部マニホールドを通
して各セルへ導かれた後、セパレータ２により各セルへ
分配される。その後反応ガスはアノードおよびカソード
ガス通路３，４を通り、リブ付アノードおよびカソード
電極５，６に達し電池反応が行なわれる。この場合に電
極５，６は電池反応が電極中の三相帯（電解質，電極，
反応ガスの３者の接する部分）で起るため、多孔質であ
る程度の気孔率（電極の全体積に占める空間の割合）を
持つことが必要である。In the fuel cell thus configured, the electrolyte plate 1 has a role of holding lithium carbonate (L i2 CO 3 ) and potassium carbonate (K 2 CO 3 ) necessary for the cell reaction in a molten state (650 ° C.). It is a porous insulator. Rib anode electrode 5
The ribbed cathode electrode 6 plays a role of a catalyst that provides a place where the reaction gas reacts with the electrolyte. The separator 2 plays a role of distributing gas to each cell when a fuel cell is laminated in a plurality of cells. The anode and cathode gas passages 3 and 4 have a role of supplying gas to the ribbed anode and the cathode electrodes 5 and 6 and exhausting gas after the reaction. The laminated battery is kept at a high temperature of 650 ° C during power generation, and is tightened with a surface pressure of about 2 to 3 kg / cm 2 to prevent contact resistance between each cell and gas leakage. The reaction gas is introduced into each cell through an internal manifold or an external manifold and then distributed to each cell by the separator 2. After that, the reaction gas passes through the anode and cathode gas passages 3 and 4, and reaches the ribbed anode and cathode electrodes 5 and 6, and the cell reaction is performed. In this case, the electrodes 5 and 6 are the three-phase zone (electrolyte, electrode,
Since it occurs in the reaction gas (where the three come into contact with each other), it must be porous and have a certain degree of porosity (ratio of space occupying in the total volume of the electrode).
このように構成された燃料電池で本実施例ではリブ付ア
ノード、カソード電極５，６の凹凸部に電極部材より高
剛性で、かつ凹凸部の面に密着するように形成した多孔
質波板８を設け電極と一体にするとともに、多孔質波板
８の反電解質板側凹部を夫々アノードガス通路３、カソ
ードガス通路４とした。このようにすることにより、電
極の凹凸部、特に凸部に加わえられる局部的な圧力を均
等に分散するようになって、電極５，６の形くずれ、ガ
ス通路３，４の変形が防止されるようになり、電極５，
６の気孔率の変化、ガス通路３，４の変形および接触面
圧の減少を防止することを可能とした燃料電池を得るこ
とができる。In the fuel cell configured as described above, in the present embodiment, the porous corrugated plate 8 is formed on the concave and convex portions of the ribbed anode and cathode electrodes 5 and 6 so as to have higher rigidity than the electrode member and to be in close contact with the surface of the concave and convex portions. And the recesses of the porous corrugated plate 8 on the side of the anti-electrolyte plate are used as the anode gas passage 3 and the cathode gas passage 4, respectively. By doing so, the uneven pressure of the electrodes, in particular the local pressure applied to the projections, is evenly distributed, and the deformation of the electrodes 5, 6 and the deformation of the gas passages 3, 4 are prevented. And the electrodes 5,
It is possible to obtain the fuel cell capable of preventing the change in the porosity of No. 6, the deformation of the gas passages 3, 4 and the reduction of the contact surface pressure.
すなわちセパレータ２の波板を通気性に富み、かつ電極
部材より高剛性の多孔質波板８とし、多孔質波板８の凹
凸部の面にカソード電極６（ＮiＯ粉末）、アノード電
極５を夫々焼結させ密着し電極と一体にした。そして、
この多孔質波板８の反電解質板側をカソードガス通路
４、アノードガス通路３とした。このようにすることに
より電極の凹凸部に密着され、電極と一体となった多孔
質波板８は、その剛性が電極部材より大きいので、電極
の凹凸部、特に凸部に加わえられる局部的な圧力を均等
に分散するようになる。従つてクリープによる気孔率の
変化、ガス通路３，４の変形、電解質板１との密着性の
低下を防止することができる。また、電極５，６を波板
８表面に焼結してあるので、容易に電極表面を機械加工
し、電極厚みを管理することができる。That the corrugated sheets of the separator 2 rich breathable, and the porous corrugated plate 8 highly rigid than the electrode member, a cathode electrode 6 (N i O powder) on the surface of the uneven portion of the porous corrugated plate 8, the anode electrode 5 Were sintered and adhered to each other to be integrated with the electrode. And
The anti-electrolyte plate side of the porous corrugated plate 8 was used as the cathode gas passage 4 and the anode gas passage 3. By doing this, the rigidity of the porous corrugated plate 8 that is brought into close contact with the uneven portions of the electrode and is integral with the electrode is greater than that of the electrode member, so that the uneven surface of the electrode, in particular the convex portion, can be locally applied. The pressure will be evenly distributed. Therefore, it is possible to prevent the change of the porosity due to the creep, the deformation of the gas passages 3 and 4, and the deterioration of the adhesiveness with the electrolyte plate 1. Further, since the electrodes 5 and 6 are sintered on the surface of the corrugated plate 8, the electrode surface can be easily machined to control the electrode thickness.
上述のように本発明は電極の気孔率の変化、ガス通路の
変形および接触面圧の減少が防止されるようになつて、
電極の気孔率の変化，ガス通路の変形および接触面圧の
減少を防止することを可能とした燃料電池を得ることが
できる。As described above, the present invention prevents the change of the porosity of the electrode, the deformation of the gas passage and the decrease of the contact surface pressure,
It is possible to obtain a fuel cell capable of preventing the change of the porosity of the electrode, the deformation of the gas passage and the decrease of the contact surface pressure.
第１図は本発明の燃料電池の一実施例の積層セルの斜視
図、第２図は同じく一実施例の積層セルの積層状態を示
す正面図である。 １……電解質板、２……セパレータ、３……アノードガ
ス通路、４……カソードガス通路、５……リブ付アノー
ド電極、６……リブ付カソード電極、８……多孔質波
板。FIG. 1 is a perspective view of a laminated cell of one embodiment of the fuel cell of the present invention, and FIG. 2 is a front view showing a laminated state of the laminated cell of the same embodiment. 1 ... Electrolyte plate, 2 ... Separator, 3 ... Anode gas passage, 4 ... Cathode gas passage, 5 ... Ribbed anode electrode, 6 ... Ribbed cathode electrode, 8 ... Porous corrugated plate.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高橋 務 茨城県日立市幸町３丁目１番１号 株式会 社日立製作所日立工場内 (72)発明者 秋元 淳 茨城県日立市幸町３丁目１番１号 株式会 社日立製作所日立工場内 (56)参考文献 特開 昭58−71564（ＪＰ，Ａ) 特開 昭60−12670（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsutomu Takahashi 3-1-1, Saiwaicho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi factory (72) Inventor Jun Akimoto 3-chome, Hitachi-shi, Ibaraki No. 1 Stock company Hitachi Ltd. Hitachi factory (56) Reference JP-A-58-71564 (JP, A) JP-A-60-12670 (JP, A)
Claims (1)
を備え、前記セパレータは対向配置され、かつ夫々アノ
ード、カソードガス通路を有するリブ付アノード電極、
カソード電極を備えている燃料電池において、 前記リブ付アノード電極、カソード電極の凹凸部に電極
部材より高剛性で、かつ凹凸部の面に密着するように形
成した多孔質波板を設け前記電極と一体にするととも
に、該多孔質波板の反電解質板側凹部を夫々前記アノー
ドガス通路、カゾードガス通路としたことを特徴とする
燃料電池。1. A ribbed anode electrode comprising separators laminated with an electrolyte plate sandwiched therebetween, said separators being opposed to each other and having an anode and a cathode gas passage, respectively.
In a fuel cell provided with a cathode electrode, the ribbed anode electrode, the corrugated portion of the cathode electrode is provided with a porous corrugated plate that has higher rigidity than the electrode member and is formed so as to be in close contact with the surface of the corrugated portion. A fuel cell, characterized in that the recesses of the porous corrugated plate on the side of the anti-electrolyte plate are used as the anode gas passage and the cathode gas passage, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61261866A JPH0624124B2 (en) | 1986-11-05 | 1986-11-05 | Fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61261866A JPH0624124B2 (en) | 1986-11-05 | 1986-11-05 | Fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63116369A JPS63116369A (en) | 1988-05-20 |
| JPH0624124B2 true JPH0624124B2 (en) | 1994-03-30 |
Family
ID=17367844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61261866A Expired - Fee Related JPH0624124B2 (en) | 1986-11-05 | 1986-11-05 | Fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0624124B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100599715B1 (en) * | 2004-06-23 | 2006-07-12 | 삼성에스디아이 주식회사 | Fuel cell system, stack, and separator of the same |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6280870B1 (en) * | 1999-08-26 | 2001-08-28 | Plug Power Inc. | Combined fuel cell flow plate and gas diffusion layer |
| JP4238532B2 (en) * | 2002-07-15 | 2009-03-18 | トヨタ自動車株式会社 | Fuel cell |
| US6890679B2 (en) * | 2002-08-23 | 2005-05-10 | Fuelcell Energy, Inc. | Dual-porosity ribbed fuel cell cathode |
-
1986
- 1986-11-05 JP JP61261866A patent/JPH0624124B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100599715B1 (en) * | 2004-06-23 | 2006-07-12 | 삼성에스디아이 주식회사 | Fuel cell system, stack, and separator of the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63116369A (en) | 1988-05-20 |
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