JPH0340449B2 - - Google Patents
Info
- Publication number
- JPH0340449B2 JPH0340449B2 JP58185660A JP18566083A JPH0340449B2 JP H0340449 B2 JPH0340449 B2 JP H0340449B2 JP 58185660 A JP58185660 A JP 58185660A JP 18566083 A JP18566083 A JP 18566083A JP H0340449 B2 JPH0340449 B2 JP H0340449B2
- Authority
- JP
- Japan
- Prior art keywords
- conductive
- fluororesin
- carbon
- conductive fluororesin
- composite sheet
- 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 - Lifetime
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 229910052799 carbon Inorganic materials 0.000 claims description 19
- 239000002131 composite material Substances 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 239000003566 sealing material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- -1 polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 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
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
-
- 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
- H01M8/0297—Arrangements for joining electrodes, reservoir layers, heat exchange units or bipolar separators to each other
-
- 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
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Non-Insulated Conductors (AREA)
- Fuel Cell (AREA)
Description
【発明の詳細な説明】
本発明は導電性を有するガス遮断隔膜を形成す
る方法の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved method of forming an electrically conductive gas barrier membrane.
燃料電池においては、電解質マトリツクス層の
片面に陽極を、他面には陰極をそれぞれ設けた単
電池を導電性を有するガス遮断隔膜を介して所定
箇積層し、隔膜によつて単電池相互を直列に電気
的に導通すると共に単電池相互間における燃料ガ
スを遮断している。 In a fuel cell, single cells each having an anode on one side of an electrolyte matrix layer and a cathode on the other side are stacked at predetermined locations via a conductive gas barrier membrane, and the cells are connected in series through the membrane. The cells are electrically connected to each other, and the fuel gas between the cells is cut off.
この隔膜の形成においては隔膜用板の周囲を単
電池に対しシール材によりシールする必要があ
る。この場合、シール材には耐熱性、耐薬品性
（電解液に対する耐腐食性）に秀れたものを用い
る必要があり、フツ素樹脂に限定されてしまう
が、従来、隔膜用板にはカーボン板又は金属板を
用いており、このような剛直板を上記フツ素樹脂
シール材でシールすることは至難である。更に、
カーボン板を使用する場合は、機械的強度の保持
のため厚くする必要があり、電池全体の厚さが厚
くなるといつた不利があるし、又、金属板を使用
する場合は、電解液に対し耐腐食性の金属を選択
する必要があり、高価であるといつた不利があ
る。 In forming this diaphragm, it is necessary to seal the periphery of the diaphragm plate to the cell with a sealing material. In this case, it is necessary to use a sealing material with excellent heat resistance and chemical resistance (corrosion resistance against electrolyte), and it is limited to fluorine resin, but conventionally, diaphragm plates are made of carbon. A plate or metal plate is used, and it is extremely difficult to seal such a rigid plate with the above-mentioned fluororesin sealing material. Furthermore,
When using a carbon plate, it needs to be thick to maintain mechanical strength, which has the disadvantage of increasing the thickness of the entire battery.Also, when using a metal plate, it has to be made thicker to maintain mechanical strength. The disadvantage is that a corrosion-resistant metal must be selected and is expensive.
本発明は、かゝる不利を解消すべく、隔膜用板
に耐腐食性に秀れた非金属性のものを使用し、し
かも、その隔膜用板のシールを確実に行い得る、
導電性ガス遮断隔膜を形成する方法を提供するこ
とにある。 In order to eliminate such disadvantages, the present invention uses a non-metallic material with excellent corrosion resistance for the diaphragm plate, and furthermore, the diaphragm plate can be reliably sealed.
An object of the present invention is to provide a method of forming a conductive gas barrier membrane.
すなわち、本発明に係る導電性を有するガス遮
断隔膜を形成する方法は、導電性フツ素樹脂を含
浸したカーボンペーパ又はカーボンクロスに、こ
れよりも周囲寸法の大なる導電性フツ素樹脂フイ
ルムを積層してなる複合シートを導電性フツ素樹
脂フイルムの周囲においてシールすることにより
隔膜を形成することを特徴とする方法である。 That is, the method for forming a conductive gas barrier membrane according to the present invention involves laminating a conductive fluororesin film with a larger circumference on carbon paper or carbon cloth impregnated with a conductive fluororesin. This method is characterized in that a diaphragm is formed by sealing a composite sheet made of the same material around a conductive fluororesin film.
以下、図面により本発明を説明する。 The present invention will be explained below with reference to the drawings.
第１図は本発明において使用する複合シートＡ
を示している。 Figure 1 shows composite sheet A used in the present invention.
It shows.
第１図において、１は導電性フツ素樹脂フイル
ムであり、例えばカーボンブラツクを配合したフ
ツ素樹脂の焼結ブロツクをフイルム状に切削した
ものを用いることができる。２はカーボンペーパ
又はカーボンクロスに導電性フツ素樹脂デイスパ
ージヨンを含し、この含浸デイスパージヨンを焼
結してなる導電性フツ素樹脂含浸カーボンペーパ
又はクロス（以下、導電性フツ素樹脂含浸カーボ
ンクロスと称す）であり、導電性フツ素樹脂フイ
ルム１の両面に積層されている。この積層はフツ
素樹脂の融点以上の温度下で加熱加圧することに
より行われる。この複合シートＡにおいて、導電
性フツ素樹脂フイルム１の周囲寸法は、導電性カ
ーボンクロス２，２の周囲寸法よりも大とされて
いる。この複合シートにおけるフツ素樹脂にはポ
リテトラフルオロエチレン、テトラフルオロエチ
レン−ヘキサフルオロプロピレン共重合体、テト
ラフルオロエチレン−パーフルオロアルキルビニ
ルエーテル共重合体等を用いることができる。 In FIG. 1, reference numeral 1 denotes a conductive fluororesin film, which may be, for example, a film obtained by cutting a sintered block of fluororesin containing carbon black into a film shape. 2 contains a conductive fluororesin dispersion in carbon paper or carbon cloth, and the conductive fluororesin-impregnated carbon paper or cloth (hereinafter referred to as conductive fluororesin-impregnated) is obtained by sintering this impregnated dispersion. (referred to as carbon cloth), and is laminated on both sides of the conductive fluororesin film 1. This lamination is carried out by heating and pressing at a temperature higher than the melting point of the fluororesin. In this composite sheet A, the circumferential dimension of the conductive fluororesin film 1 is larger than the circumferential dimension of the conductive carbon cloths 2, 2. As the fluororesin in this composite sheet, polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, etc. can be used.
本発明によつて燃料電池の単電池相互間に隔膜
を形成するには、第２図に示すように、単電池Ｂ
（b0は電解質マトリツクス、b1，b1はガス透過性
を有する電極であり、通常、多孔質カーボン板が
使用されている）を、上記複合シートＡを介して
積層し、各複合シートＡの導電性フツ素樹脂フイ
ルム１の周囲端部と電極b1の周囲端部との間にフ
ツ素樹脂シール材Ｃ（例えば、ポリテトラフルオ
ロエチレン、テトラフルオロエチレン−ヘキサフ
ルオロプロピレン共重合体、テトラフルオロエチ
レン−パーフルオロアルキルビニルエーテル共重
合体等）を介在させ圧縮すればよい。 In order to form a diaphragm between the single cells of a fuel cell according to the present invention, as shown in FIG.
(b 0 is an electrolyte matrix, b 1 and b 1 are gas permeable electrodes, and porous carbon plates are usually used) are laminated with the above composite sheet A interposed therebetween, and each composite sheet A A fluororesin sealing material C (for example, polytetrafluoroethylene, tetrafluoroethylene -hexafluoropropylene copolymer, tetrafluoroethylene (fluoroethylene-perfluoroalkyl vinyl ether copolymer, etc.) may be used for compression.
この場合、最も外側の単電池に対する隔膜の形
成には、第２図のA0で示すように、導電性フツ
素樹脂フイルム１の片面にのみ導電性フツ素樹脂
含浸カーボンクロス２を積層した複合シートが用
いられる。 In this case, to form a diaphragm for the outermost cell, as shown by A0 in FIG. A sheet is used.
第２図において、導電性フツ素樹脂フイルム１
が秀れたガス遮断性を有しており、しかも、シー
ル材Ｃと同材質であるフツ素樹脂をベース樹脂と
しているためにシールを確実に行うことがでるか
ら、単電池相互間を良好にガス遮断できる。又、
導電性樹脂含浸カーボンクロス２が導電性基材に
導電材を含浸したものであるから、導電性に秀れ
ており、単電池相互の電極間の大半（約10分の
９）がこの導電性樹脂含浸カーボンクロスで占め
られているから、その電極間を極めて低い電気抵
抗で導通できる。更に、導電性フツ素樹脂フイル
ム１は可撓性であり、圧縮してもカーボン板のよ
うに割れたりせず、従つて、同フイルムを薄くで
き、電池全体をコンパクト化できる。勿論、複合
シートが耐腐食性に秀れたフツ素樹脂、カーボン
から構成されているから、腐食の問題もない。 In FIG. 2, a conductive fluororesin film 1
has excellent gas barrier properties, and since the base resin is fluororesin, which is the same material as Sealing Material C, it is possible to seal reliably, allowing for good sealing between cells. Gas can be shut off. or,
Since the conductive resin-impregnated carbon cloth 2 is a conductive base material impregnated with a conductive material, it has excellent conductivity, and the majority (approximately 9/10) of the space between the electrodes of the single cells is this conductive. Since the electrodes are filled with resin-impregnated carbon cloth, conduction can be established between the electrodes with extremely low electrical resistance. Furthermore, the conductive fluororesin film 1 is flexible and does not crack like a carbon plate even when compressed. Therefore, the film can be made thinner and the entire battery can be made more compact. Of course, since the composite sheet is made of fluororesin and carbon, which have excellent corrosion resistance, there is no problem with corrosion.
上述した通り、本発明によれば、導電性を有す
るガス遮断隔膜を、耐腐食性に秀れた非金属性の
隔膜材を使用して、確実なシール性のもとで形成
することができる。なお、導電性フツ素樹脂フイ
ルム１の片面に、周囲寸法の小なる導電性フツ素
樹脂含浸カーボンクロス又はペーパ２を設ける場
合、第３図に示すように導電性フツ素樹脂フイル
ム１の他面にフイルム１と同周囲寸法の導電性フ
ツ素樹脂含浸カーボンクロス又はペーパ２０を積
層してもよい。 As described above, according to the present invention, a conductive gas barrier membrane can be formed with reliable sealing properties using a non-metallic membrane material with excellent corrosion resistance. . Note that when a conductive fluororesin-impregnated carbon cloth or paper 2 with a small circumferential dimension is provided on one side of the conductive fluororesin film 1, the other side of the conductive fluororesin film 1 is provided as shown in FIG. A conductive fluororesin-impregnated carbon cloth or paper 20 having the same circumferential dimensions as the film 1 may be laminated thereon.
第１図は本発明において使用する複合シートを
示す説明図、第２図は本発明により単電池相互間
を結合した燃料電池を示す説明図、第３図は本発
明において使用する複合シートの別例を示す説明
図である。
図において、Ａは複合シート、１は導電性フツ
素樹脂フイルム、２，２は導電性フツ素樹脂含浸
カーボンペーパ又はクロス、Ｃはシール材であ
る。
Fig. 1 is an explanatory diagram showing a composite sheet used in the present invention, Fig. 2 is an explanatory diagram showing a fuel cell in which unit cells are connected to each other according to the present invention, and Fig. 3 is an explanatory diagram showing another composite sheet used in the present invention. It is an explanatory diagram showing an example. In the figure, A is a composite sheet, 1 is a conductive fluororesin film, 2 and 2 are carbon paper or cloth impregnated with conductive fluororesin, and C is a sealing material.
Claims (1)
又はカーボンクロスに、これよりも周囲寸法の大
なる導電性フツ素樹脂フイルムを積層してなる複
合シートを導電性フツ素樹脂フイルムの周囲にお
いてシールすることにより隔膜を形成することを
特徴とする導電性を有するガス遮断隔膜を形成す
る方法。1. Sealing a composite sheet made by laminating a conductive fluororesin film with a larger circumference on carbon paper or carbon cloth impregnated with conductive fluororesin around the conductive fluororesin film. 1. A method for forming a gas barrier membrane having electrical conductivity, the method comprising forming a membrane by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58185660A JPS6077363A (en) | 1983-10-03 | 1983-10-03 | Formation of gas isolating separator film having electroconductivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58185660A JPS6077363A (en) | 1983-10-03 | 1983-10-03 | Formation of gas isolating separator film having electroconductivity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6077363A JPS6077363A (en) | 1985-05-01 |
| JPH0340449B2 true JPH0340449B2 (en) | 1991-06-19 |
Family
ID=16174640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58185660A Granted JPS6077363A (en) | 1983-10-03 | 1983-10-03 | Formation of gas isolating separator film having electroconductivity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6077363A (en) |
-
1983
- 1983-10-03 JP JP58185660A patent/JPS6077363A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6077363A (en) | 1985-05-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |