JPS6077363A - Formation of gas isolating separator film having electroconductivity - Google Patents

Formation of gas isolating separator film having electroconductivity

Info

Publication number
JPS6077363A
JPS6077363A JP58185660A JP18566083A JPS6077363A JP S6077363 A JPS6077363 A JP S6077363A JP 58185660 A JP58185660 A JP 58185660A JP 18566083 A JP18566083 A JP 18566083A JP S6077363 A JPS6077363 A JP S6077363A
Authority
JP
Japan
Prior art keywords
fluorine resin
conductive
carbon
resin film
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.)
Granted
Application number
JP58185660A
Other languages
Japanese (ja)
Other versions
JPH0340449B2 (en
Inventor
Koji Suzuki
弘二 鈴木
Eiji Takahata
高畠　栄治
Yasuhiro Moriyama
森山　康弘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitto Denko Corp
Original Assignee
Nitto Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nitto Electric Industrial Co Ltd filed Critical Nitto Electric Industrial Co Ltd
Priority to JP58185660A priority Critical patent/JPS6077363A/en
Publication of JPS6077363A publication Critical patent/JPS6077363A/en
Publication of JPH0340449B2 publication Critical patent/JPH0340449B2/ja
Granted legal-status Critical Current

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
    • H01M8/0271—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)
  • Fuel Cell (AREA)
  • Non-Insulated Conductors (AREA)

Abstract

PURPOSE:To surely seal a separator plate by stacking a electroconductive fluorine resin film whose dimension is larger than that of a carbon paper on the carbon paper impregnated with electroconductive fluorine resin, and sealing this composite sheet in the periphery of the conductive fluorine resin film. CONSTITUTION:Carbon paper of carbon cloth is impregnated with electroconductive fluorine resin dispersion and the impregnated dispersion is sintered. This carbon paper of carbon cloths 2 are stacked on both sides of electroconductive fluorine resin film 1. In this composite sheet A, dimension of the conductive fluorine resin film is larger than dimensions of carbon cloths 2 and 2. To form separator between unit cells of fuel cell, unit cells B are stacked with a composite sheet A sandwiched between them, and a fluorine resin sealant C is arranged in a space formed between the periphery of conductive fluorine resin film 1 and the periphery of electrode b1.

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、電解質マトリックス層の片面に陽
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部積層し、隔膜によっ
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 together in a predetermined area through a conductive gas barrier membrane, and the membrane connects the single cells in series. It conducts electrically between the cells and blocks fuel gas between the cells.

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、フッ素樹脂に限定
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、このような剛直根を上記フン素樹脂
シールイシ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った不
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
いった不利がある。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 electrolytes), and it is limited to fluororesin, but conventionally, carbon plates have been used as diaphragm plates. Alternatively, a metal plate is used, and it is extremely difficult to seal such a rigid tap root with the above-mentioned fluorine resin sealer. Furthermore, when using a carbon plate, it has to be thick to maintain mechanical strength, which has the disadvantage of increasing the overall thickness of the battery.Also, when using a metal plate, it has the disadvantage of increasing the thickness of the electrolyte. On the other hand, it is necessary to select a corrosion-resistant metal, which has the disadvantage of being expensive.

本発明は、かＸる不利を解消すべく、隔膜用板に耐腐食
性に秀れた非金属製のものを使用し、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 also uses a conductive gas that can reliably seal the diaphragm plate. An object of the present invention is to provide a method of forming a 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、導電性フッ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犬
なる導電性フッ素樹脂フィルムを積層してなる複合シー
トを導電性フッ素樹脂フィ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 of forming a conductive gas barrier membrane according to the present invention involves laminating a conductive fluororesin film with a smaller circumference on carbon paper or carbon cloth impregnated with a conductive fluororesin. This method is characterized by forming a diaphragm by sealing a composite sheet 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。FIG. 1 shows a composite sheet A used in the present invention.

第１図において、ｌは導電性フッ素樹脂フィルムであり
、例えばカーボンブラックを配合したフッ素樹脂の焼結
ブロックをフィルム状に切削したものを用いることがで
きる。２はカーボンベーパ又はカーボンクロスに導電性
フッ素樹脂ディスパージョンを含浸し、この含浸ディス
パージョンを焼結してなる導電性フッ素樹脂含浸カーボ
ンペーパ又はクロス（以下、導電性フッ素樹脂含浸カー
ボンクロスと称す）であり、導電性フッ素樹脂フィルム
１の両面に積層されている。この積層はフッ素樹脂の融
点以」二の温度下で加熱加圧することにより行われる。In FIG. 1, l is a conductive fluororesin film, and for example, a sintered block of fluororesin mixed with carbon black that is cut into a film shape can be used. 2 is conductive fluororesin-impregnated carbon paper or cloth (hereinafter referred to as conductive fluororesin-impregnated carbon cloth) obtained by impregnating carbon vapor or carbon cloth with conductive fluororesin dispersion and sintering this impregnated dispersion. and is laminated on both sides of the conductive fluororesin film 1. This lamination is carried out by heating and pressurizing at a temperature two times higher than the melting point of the fluororesin.

この複合シートＡにおいて、導電性フッ素樹脂フィルム
１の周囲寸法は、導電性カーボンクロス２゜２の周囲寸
法よりも犬とされている。この複合シートにおけるフッ
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−へキサフルオロプロピレン共重合体、ナト
５フルオロエチレンーパーフルＡ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 this composite sheet A, the circumference of the conductive fluororesin film 1 is smaller than the circumference of the conductive carbon cloth 2°2. As the fluororesin in this composite sheet, polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, nato5-fluoroethylene-perfluoroalkyl vinyl ether copolymer, etc. can be used.

本発明によっ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（ｂ（１は電解
質マトリックス、ｂｌ、ｂｌ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
導電性フッ素樹脂フィルム１の周囲端部と電極ｂ１の周
囲端部との間にフン素樹脂シールＪＲ’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を合体、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）を介在させ圧締すればよい。In order to form a diaphragm between cells of a fuel cell according to the present invention, as shown in FIG. porous carbon plates) are laminated with the composite sheets A interposed therebetween, and between the peripheral edge of the conductive fluororesin film 1 of each composite sheet A and the peripheral edge of the electrode b1. Fluorine resin seal JR'c (e.g. polytetrafluoroethylene, tetrafluoroethylene-
Hexafluoropropylene, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, etc.) may be interposed therebetween and the mixture may be pressed.

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Ａｎで示すように、導電性フッ素樹脂フィルム
１の片面にのみ導電性フッ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, the formation of the diaphragm for the outermost cell requires
As shown by An in FIG.
A composite sheet made of laminated layers is used.

第２図において、導電性フッ素樹脂フィルム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
であるフッ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きるから、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、導電性フッ素樹脂フィルム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すせず、従っ
て、同フィルムを薄くでき、電池全体をコン／ぐクト化
できる。勿論、複合シートカ耐腐食性に秀れたフッ素樹
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, the conductive fluororesin film 1 has excellent gas barrier properties, and since the base resin is fluororesin, which is the same material as the sealing material C, it is possible to seal reliably. This allows good gas isolation between the single cells. Also, conductive resin impregnated carbon cloth 2
Because it 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 cell is occupied by this conductive resin-impregnated carbon cloth. Because of this, 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, so the film can be made thinner and the entire battery can be made into a concrete. 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、面ｊ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て形成することができる。As described above, according to the present invention, it is possible to form a conductive gas barrier membrane with reliable sealing properties using a non-metallic membrane material with excellent surface corrosion resistance. can.

なお、導電性フッ素樹脂フィルム１の片面に、周囲寸法
の小なる導電性フッ素樹脂含浸カーボンクロス又ハペー
パ２を設ける場合、第３図に示すように導電性フッ素樹
脂フィルム１の他面にフィルム１と同周囲寸法の導電性
フッ素樹脂含浸カーボンクロス又はベーパ２０を積層し
てもよい。Note that when a conductive fluororesin-impregnated carbon cloth or paper 2 with a small circumference is provided on one side of the conductive fluororesin film 1, the film 1 is provided on the other side of the conductive fluororesin film 1 as shown in FIG. Conductive fluororesin-impregnated carbon cloth or vapor 20 having the same circumferential dimensions may be laminated.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明において使用する複合ソートを示す説明
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
合ソートの別例をＶ″３Ｍ ？０Fig. 1 is an explanatory diagram showing the composite sort 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 the composite sort used in the present invention. For example, V″3M?0

Claims (1)

【特許請求の範囲】[Claims] （１）　導電性フッ素樹脂を含浸したカーボンベーパ又
はカーボンクロスに、これよりも周囲寸法の大なる導電
性フッ素樹脂フィルムを積層してなる複合シートを導電
性フッ素樹脂フィ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) By sealing a composite sheet made by laminating a conductive fluororesin film with a larger circumference on carbon vapor or carbon cloth impregnated with conductive fluororesin around the conductive fluororesin film. A method for forming a gas barrier membrane having electrical conductivity, the method comprising forming a membrane.
JP58185660A 1983-10-03 1983-10-03 Formation of gas isolating separator film having electroconductivity Granted JPS6077363A (en)

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 true JPS6077363A (en) 1985-05-01
JPH0340449B2 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)

Also Published As

Publication number Publication date
JPH0340449B2 (en) 1991-06-19

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