JPH0212775A - Manufacture of fuel cell electrode base material - Google Patents
Manufacture of fuel cell electrode base materialInfo
- Publication number
- JPH0212775A JPH0212775A JP63163001A JP16300188A JPH0212775A JP H0212775 A JPH0212775 A JP H0212775A JP 63163001 A JP63163001 A JP 63163001A JP 16300188 A JP16300188 A JP 16300188A JP H0212775 A JPH0212775 A JP H0212775A
- Authority
- JP
- Japan
- Prior art keywords
- base material
- electrode base
- electrolyte
- water
- fuel cell
- 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
- 239000000463 material Substances 0.000 title claims abstract description 30
- 239000000446 fuel Substances 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000003792 electrolyte Substances 0.000 claims abstract description 37
- 239000006185 dispersion Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 230000001678 irradiating effect Effects 0.000 claims abstract description 5
- 239000005871 repellent Substances 0.000 claims description 13
- 239000003054 catalyst Substances 0.000 claims description 12
- 239000011159 matrix material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 6
- 239000002737 fuel gas Substances 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 4
- PYVHTIWHNXTVPF-UHFFFAOYSA-N F.F.F.F.C=C Chemical compound F.F.F.F.C=C PYVHTIWHNXTVPF-UHFFFAOYSA-N 0.000 abstract 3
- 239000012495 reaction gas Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 230000002940 repellent Effects 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011850 water-based material Substances 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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8803—Supports for the deposition of the catalytic active composition
- H01M4/8807—Gas diffusion layers
-
- 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
- H01M4/88—Processes of manufacture
- H01M4/8817—Treatment of supports before application of the catalytic active composition
-
- 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
- H01M4/88—Processes of manufacture
- H01M4/8817—Treatment of supports before application of the catalytic active composition
- H01M4/8821—Wet proofing
-
- 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
- H01M8/0289—Means for holding the electrolyte
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Inert Electrodes (AREA)
- Fuel Cell (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は燃料電池電極基材の製造方法に係り、特に電
解質リザーバの形成方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a fuel cell electrode base material, and more particularly to a method for forming an electrolyte reservoir.
第６図は従来のマ） ＩＪクス型燃料電池の単電池を示
す模式断面図である。電極基材２には電極触媒層でちる
酸化剤極触媒層７または燃料極触媒層５が結着される。FIG. 6 is a schematic sectional view showing a single cell of a conventional IJ type fuel cell. An oxidizer electrode catalyst layer 7 or a fuel electrode catalyst layer 5, which is an electrode catalyst layer, is bonded to the electrode base material 2.
酸化剤極触媒層７と燃料極触媒層５が電解質を含むマＩ
Ｊ ＩＪワックスをはさむ。セパレータ１が電極基材２
を流れる２種類の反応ガスを相互に分離する。電極基材
２には反応ガス通路９．１０が設けられる。燃料極側の
電極基材にはさらに非はつ水部である電解質リザーバ３
とはつ水部である反応ガス供給基４とが設けられる。The oxidizer electrode catalyst layer 7 and the fuel electrode catalyst layer 5 contain an electrolyte.
Apply J IJ wax. Separator 1 is electrode base material 2
The two reactant gases flowing through the reactor are separated from each other. The electrode substrate 2 is provided with reaction gas channels 9.10. The electrode base material on the fuel electrode side further includes an electrolyte reservoir 3 which is a non-water repellent part.
and a reaction gas supply group 4 which is a water-repellent part.
電極触媒層５，７にはマトリ、クス６より電解質が供給
され、電極基材２より反応ガスが供給される。電極触媒
層５，７の内部では電極触媒と電解質と反応ガスとによ
り三相界面が形成され、電気化学反応が進行する。燃料
極触媒層５には電解質連通孔８が設けられ電解質リザー
バ３より電解質がマトリ、クス６に供給される。反応ガ
ス通路９゜１０にはそれぞれ燃料ガス、酸化剤ガスが流
される。第７図は第６図においてＡ、Ｂ矢視図である。The electrode catalyst layers 5 and 7 are supplied with an electrolyte from the matrix and the matrix 6, and a reaction gas is supplied from the electrode base material 2. Inside the electrode catalyst layers 5 and 7, a three-phase interface is formed by the electrode catalyst, electrolyte, and reaction gas, and an electrochemical reaction progresses. An electrolyte communication hole 8 is provided in the fuel electrode catalyst layer 5, and electrolyte is supplied from the electrolyte reservoir 3 to the matrix and the matrix 6. A fuel gas and an oxidizing gas are flowed through the reaction gas passages 9 and 10, respectively. FIG. 7 is a view taken along arrows A and B in FIG. 6.
電極基材に電解質リザーバを設けるために従来はマスク
を載せ、スプレ塗布機を使用して四フッ化エチレンデイ
スパー−）ヨンを塗布し、熱処理を行って非はつ水部で
ある電解質リザーバ３を形成する方法が知られている。Conventionally, in order to provide an electrolyte reservoir on the electrode base material, a mask was placed on the electrode base material, and tetrafluoroethylene dispersion was applied using a spray coating machine, followed by heat treatment to form the electrolyte reservoir 3, which is a non-water repellent part. There are known methods of forming .
しかしながら上記方法によれば、リザーバーパターンを
形成させるマスクの構造上の複雑さから、リザーバーパ
ターンが制約され、燃料ガスの拡散及び電解質の円滑な
移動が阻害され、燃料電池の特性低下につながる可能性
が大きいという問題がある。However, according to the above method, due to the structural complexity of the mask used to form the reservoir pattern, the reservoir pattern is restricted, inhibiting the diffusion of fuel gas and smooth movement of the electrolyte, which may lead to deterioration of the characteristics of the fuel cell. The problem is that it is large.
この発明は上記の点に鑑みてなされその目的は任意のパ
ターンの電解質リザーバが得られるようにして燃料ガス
および電解質の拡散性に優れる電極基材を製造する方法
を提供することにある。The present invention has been made in view of the above points, and an object thereof is to provide a method for manufacturing an electrode base material that can obtain an electrolyte reservoir with an arbitrary pattern and has excellent diffusivity for fuel gas and electrolyte.
〔課題を解決するだめの手段］
上記の目的はこの発明によれば厚さ方向については全長
にわたり、また面方向については局部的にはつ水部を設
けて電極触媒層に反応ガス供給を行うとともに前記はつ
水部を除く非はつ水部を電解質リザーバとしてマトリッ
クスに電解質の供給を行う燃料電池電極基材の製造方法
において、多孔質の電極基材に四ツ、化エチレンディス
／’Ｐ−ジョンを含浸したのち熱処理して電極基材全体
にはつ水性を賦与し、次いでレーザ光を所定のパターン
で照射して電解質リザーバを形成することにより達成さ
れる。[Means for Solving the Problem] According to the present invention, the above object is to provide a water-repellent portion over the entire length in the thickness direction and locally in the planar direction to supply a reactive gas to the electrode catalyst layer. In the method for producing a fuel cell electrode base material, the non-water repellent part excluding the water repellent part is used as an electrolyte reservoir to supply an electrolyte to the matrix, and the porous electrode base material is provided with ethylene dichloride/'P. - This is achieved by impregnating the electrode base material with a gel and then heat treating it to impart water repellency to the entire electrode base material, and then irradiating it with laser light in a predetermined pattern to form an electrolyte reservoir.
四フフ化エチレンディスバージョンは熱処理によフ結着
しはつ水性を呈するに至る。レーザ光はン
その熱作用によシ四フ、化エチレスを燃焼揮散させる。Tetrafluoroethylene dispersion is bound by heat treatment and becomes water-repellent. The laser beam burns and volatilizes the chemical by its thermal action.
レーザ光は高精度でかつ任意の・母ターンの電解質リザ
ーバを形成することができる。Laser light can form electrolyte reservoirs with high precision and arbitrary mother turns.
次にこの発明の実施例を図面に基いて説明する。 Next, embodiments of the present invention will be described based on the drawings.
第１図は本発明の実施例を示すもので、加工機本体１１
の吸引テーブル１２に電解質リザーバの形成される電極
基材２が取付けられる。第２図は第１図の側面図である
。電極基材２にレーザー光照射部１４よりレーザ−光が
照射され、含浸、焼成された四フッ化エチレンを事前に
設定された加エバターンに従い、ｘ−ｙテーブル１５を
数値制御等によりコントロールし、蒸発させ、電解質リ
ザーバを形成させる。第３図、第４図は形成された電解
質リザーバのパターンを示す。第５図は第３図、第４図
の断面図である。FIG. 1 shows an embodiment of the present invention, in which a processing machine main body 11
The electrode base material 2 on which the electrolyte reservoir is formed is attached to the suction table 12 of the electrolyte reservoir. FIG. 2 is a side view of FIG. 1. The electrode base material 2 is irradiated with laser light from the laser light irradiation unit 14, and the impregnated and calcined tetrafluoroethylene is processed according to a preset evaporation turn, and the x-y table 15 is controlled by numerical control or the like. Evaporate and form an electrolyte reservoir. Figures 3 and 4 show the pattern of electrolyte reservoirs formed. FIG. 5 is a sectional view of FIGS. 3 and 4. FIG.
この発明においてはレーザ光照射に先立ち、四フッ化エ
チレンのデイスパージョンを含浸するので、スダレ−法
よりもディスバージョンの使用量を減らすことができる
。レーザ光使用により、コスト低減も可能となる。In this invention, the dispersion of tetrafluoroethylene is impregnated prior to laser beam irradiation, so the amount of dispersion used can be reduced compared to the Sdale method. The use of laser light also makes it possible to reduce costs.
この発明によれば厚さ方向については全長にわたり、ま
た面方向については局部的にはつ水部を設けて電極触媒
層に反応ガス供給を行うとともに前記はつ水部を除く非
はつ水部を電解質リザーバとしてマトリックスに電解質
の供給を行う燃料電池電極基材の製造方法において、多
孔質の電極基材に四フッ化エチレンディスパーゾ、ンを
含浸したのち熱処理して電極基材全体にはつ水性を賦与
し、次いでレーザ光を所定のパターンで照射して電解質
リザーバを形成するので、レーザ光照射パターンの任意
性や高精度の加工が行えることにより最良のパターンに
おいて電解質リザーバを形成することができ、その結果
燃料ガスおよび電解質の拡散が良好となり燃料電池の特
性が向上する。According to this invention, a water-repellent portion is provided over the entire length in the thickness direction and locally in the planar direction to supply a reactive gas to the electrode catalyst layer, and a non-water-repellent portion excluding the water-repellent portion is provided. In a method for producing a fuel cell electrode base material in which electrolyte is supplied to the matrix by using the porous electrode base material as an electrolyte reservoir, a porous electrode base material is impregnated with tetrafluoroethylene dispersion, which is then heat-treated to coat the entire electrode base material. Since the electrolyte reservoir is formed by imparting a water-based material and then irradiating it with laser light in a predetermined pattern, it is possible to form the electrolyte reservoir in the best pattern due to the arbitrariness of the laser light irradiation pattern and high-precision processing. As a result, the fuel gas and electrolyte can diffuse well and the characteristics of the fuel cell are improved.
第１図はこの発明の実施例に係るレーザ光照射に使用す
る装置の説明図、第２図は第１図に係る装置の側面図、
第３図、第４図はこの発明の実施例に係る電解質リザー
バのパターンを示す平面図、第５図は第３図または第４
図に示されるｔ極基板の断面図、第６図は従来の燃料電
池の単電池を示す模式断面図、第７図は第６図に示され
る単電池のＡ−Ｂ矢視図である。
２・・・電極基板、３・・・電解質リザーバ、４・・・
反応ガス供給基。
第
■
図
第
図
第
図
第
図
第
図FIG. 1 is an explanatory diagram of an apparatus used for laser beam irradiation according to an embodiment of the present invention, FIG. 2 is a side view of the apparatus according to FIG. 1,
3 and 4 are plan views showing patterns of electrolyte reservoirs according to embodiments of the present invention, and FIG.
FIG. 6 is a schematic cross-sectional view showing a unit cell of a conventional fuel cell, and FIG. 7 is a view taken along the line A-B of the unit cell shown in FIG. 6. 2... Electrode substrate, 3... Electrolyte reservoir, 4...
Reaction gas supply group. Figure ■ Figure Figure Figure Figure
Claims (1)
いては局部的にはつ水部を設けて電極触媒層に反応ガス
供給を行うとともに前記はつ水部を除く非はつ水部を電
解質リザーバとしてマトリックスに電解質の供給を行う
燃料電池電極基材の製造方法において、多孔質の電極基
材に四フッ化エチレンディスパージョンを含浸したのち
熱処理して電極基材全体にはつ水性を賦与し、次いでレ
ーザ光を所定のパターンで照射して電解質リザーバを形
成することを特徴とする燃料電池電極基材の製造方法。1) Water-repellent parts are provided over the entire length in the thickness direction and locally in the planar direction to supply reactive gas to the electrode catalyst layer, and the non-water-repellent parts except for the water-repellent parts are used as electrolyte reservoirs. In a method for manufacturing a fuel cell electrode base material in which an electrolyte is supplied to a matrix as a porous electrode base material, a porous electrode base material is impregnated with a tetrafluoroethylene dispersion and then heat treated to impart water repellency to the entire electrode base material, A method for producing a fuel cell electrode base material, comprising: then irradiating laser light in a predetermined pattern to form an electrolyte reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63163001A JPH0212775A (en) | 1988-06-30 | 1988-06-30 | Manufacture of fuel cell electrode base material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63163001A JPH0212775A (en) | 1988-06-30 | 1988-06-30 | Manufacture of fuel cell electrode base material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0212775A true JPH0212775A (en) | 1990-01-17 |
Family
ID=15765313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63163001A Pending JPH0212775A (en) | 1988-06-30 | 1988-06-30 | Manufacture of fuel cell electrode base material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0212775A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5606467A (en) * | 1990-09-17 | 1997-02-25 | Fuji Photo Film Co., Ltd. | Apparatus for continuous recording and reproducing of data from a magnetic tape cassette comprising a semiconductor memory |
-
1988
- 1988-06-30 JP JP63163001A patent/JPH0212775A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5606467A (en) * | 1990-09-17 | 1997-02-25 | Fuji Photo Film Co., Ltd. | Apparatus for continuous recording and reproducing of data from a magnetic tape cassette comprising a semiconductor memory |
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