JP3107245B2 - Manufacturing method of gas diffusion electrode - Google Patents
Manufacturing method of gas diffusion electrodeInfo
- Publication number
- JP3107245B2 JP3107245B2 JP03309726A JP30972691A JP3107245B2 JP 3107245 B2 JP3107245 B2 JP 3107245B2 JP 03309726 A JP03309726 A JP 03309726A JP 30972691 A JP30972691 A JP 30972691A JP 3107245 B2 JP3107245 B2 JP 3107245B2
- Authority
- JP
- Japan
- Prior art keywords
- surfactant
- sheet
- solvent
- gas diffusion
- carbon black
- 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
-
- 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)
- Inert Electrodes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ガス拡散電極の製造方
法に関する。The present invention relates to a method for manufacturing a gas diffusion electrode.
【０００２】[0002]
【従来の技術】ガス拡散電極は、反応層のみからなるも
のと、反応層とガス拡散層とからなるものがある。2. Description of the Related Art There are two types of gas diffusion electrodes: one consisting only of a reaction layer and the other consisting of a reaction layer and a gas diffusion layer.
【０００３】反応層は、液体の浸入できる微細な通路
（親水部）と気体の出入可能な微細な通路（撥水部）が
入り組み接し合って混在しているものである。一般的に
液体の浸入できる微細な通路には触媒が担持されてお
り、気体の出入可能な微細な通路には触媒は多くの場合
必要としない。また親水部は主にポリ四弗化エチレンと
親水性カーボンブラックからなっており、撥水部は主に
ポリ四弗化エチレンと撥水性カーボンブラックからなっ
ている。[0003] The reaction layer is a mixture of a fine passage (hydrophilic portion) through which a liquid can enter and a fine passage (water-repellent portion) through which a gas can enter and exit. Generally, a catalyst is carried in a fine passage through which a liquid can enter, and a catalyst is not required in many cases in a fine passage through which a gas can enter and exit. The hydrophilic part is mainly composed of polytetrafluoroethylene and hydrophilic carbon black, and the water-repellent part is mainly composed of polytetrafluoroethylene and water-repellent carbon black.
【０００４】一方、ガス拡散層は、気体の出入可能な微
細な通路（撥水部）を有するもので、液体は浸入透過で
きないものである。このガス拡散層はポリ四弗化エチレ
ンと撥水性カーボンブラックとからなっている。On the other hand, the gas diffusion layer has a fine passage (water-repellent portion) through which gas can enter and exit, and cannot penetrate and permeate liquid. This gas diffusion layer is composed of polytetrafluoroethylene and water-repellent carbon black.
【０００５】従来、反応層のみからなるガス拡散電極を
作るには、親水性カーボンブラック、撥水性カーボンブ
ラック、ポリ四弗化エチレンを界面活性剤を添加して混
合し（このとき界面活性剤を添加しないとカーボンブラ
ックが分散できない）、次に濾過し乾燥、粉砕して溶剤
を添加するか又は濾過しケーキを作成して溶剤を浸透
し、次いで圧延によりシートを成形し、次いで加熱(280
℃まで）して溶剤及び界面活性剤を蒸発及び分解除去し
て反応層シートを作成し、次いでこの反応層シートを裁
断し、触媒の担持と加熱加圧のいずれかより先に行って
電極を作成している。Conventionally, in order to produce a gas diffusion electrode comprising only a reaction layer, a hydrophilic carbon black, a water-repellent carbon black, and polytetrafluoroethylene are added to a surfactant and mixed (at this time, the surfactant is used). If not added, carbon black cannot be dispersed), and then filtered, dried and pulverized to add a solvent or filtered to form a cake and impregnated with the solvent, then rolled to form a sheet, and then heated (280
° C) to evaporate and decompose and remove the solvent and surfactant to form a reaction layer sheet. Then, the reaction layer sheet is cut, and the electrode is obtained by carrying out any of the steps of supporting the catalyst and applying heat and pressure. Creating.
【０００６】また反応層とガス拡散層とからなるガス拡
散電極を作るには、前記と同様に反応層シートを作成す
る一方、撥水性カーボンブラックとポリ四弗化エチレン
を界面活性剤を添加して混合し、次に濾過し、乾燥、粉
砕して溶剤を添加するか又は濾過しケーキを作成して溶
剤を浸透し、次いで圧延によりシートを成形し、次いで
加熱(280℃まで）して溶剤及び界面活性剤を蒸発及び分
解除去してガス拡散層シートを作成し、次いで前記反応
層シートとガス拡散層シートを裁断し、反応層シートの
みに触媒を担持した後、両シートを重ね加熱加圧し一体
化して電極を作成している。In order to form a gas diffusion electrode comprising a reaction layer and a gas diffusion layer, a reaction layer sheet is prepared in the same manner as described above, while adding a surfactant to water-repellent carbon black and polytetrafluoroethylene. And then filtered, dried and pulverized to add a solvent or filtered to form a cake, impregnated with the solvent, then formed into a sheet by rolling, and then heated (up to 280 ° C) to form a sheet. Then, the gas diffusion layer sheet is prepared by evaporating and decomposing and removing the surfactant, then the reaction layer sheet and the gas diffusion layer sheet are cut, and the catalyst is carried only on the reaction layer sheet. The electrodes are made by pressing and integrating.
【０００７】ところで、上記いずれのガス拡散電極の製
造方法においても反応層シート及びガス拡散層シートを
作成する直前に、圧延により成形したシートを加熱(280
℃まで）して溶剤及び界面活性剤を蒸発及び分解除去し
ているが、実際には溶剤は蒸発するが、界面活性剤は一
部がタール状になってポリ四弗化エチレン上に残り、界
面活性剤を全部除去することが甚だ困難であった。By the way, in any of the above gas diffusion electrode manufacturing methods, the sheet formed by rolling is heated (280) immediately before forming the reaction layer sheet and the gas diffusion layer sheet.
C) to evaporate and decompose and remove the solvent and the surfactant. In practice, the solvent evaporates, but the surfactant is partially tarred and remains on the polytetrafluoroethylene, It was extremely difficult to remove all the surfactant.
【０００８】界面活性剤がポリ四弗化エチレン上にター
ル状に残っていると、電極材としている中に反応層にあ
っては、気体の出入可能な微細な通路（撥水部）に液体
が浸入するようになり、気体と液体の接し合う面積が減
少して電極が劣化し、寿命が短くなる。またガス拡散層
にあっては、気体の出入可能な微細な通路（撥水部）に
液体が浸入するようになり、液洩れしてくると同時に気
体の出入が減り、電極が劣化し、寿命が短くなる。If the surfactant remains in the form of tar on the polytetrafluoroethylene, the reaction layer is used as an electrode material, and the liquid flows into fine passages (water-repellent portions) through which gas can enter and exit. Will penetrate, the area where gas and liquid come into contact with each other will decrease, the electrodes will deteriorate, and the life will be shortened. In the gas diffusion layer, the liquid enters the fine passages (water-repellent portions) through which gas can enter and exit, and at the same time as the liquid leaks, the amount of gas entering and exiting decreases, the electrodes deteriorate, and the life of the electrode deteriorates. Becomes shorter.
【０００９】[0009]
【発明が解決しようとする課題】そこで本発明は、界面
活性剤を完全に除去して、長時間使用しても気体の出入
可能な微細な通路（撥水部）に液体が浸入することのな
いガス拡散電極を製造する方法を提供しようとするもの
である。SUMMARY OF THE INVENTION Accordingly, the present invention provides a method for removing a surfactant completely and preventing liquid from entering a fine passage (water-repellent portion) through which gas can enter and exit even when used for a long time. The present invention seeks to provide a method for producing a gas diffusion electrode.
【００１０】[0010]
【課題を解決するための手段】上記課題を解決するため
の本発明のガス拡散電極の製造方法の１つは、親水性カ
ーボンブラック、撥水性カーボンブラック、ポリ四弗化
エチレンに界面活性剤を添加して混合し、次に濾過し乾
燥、粉砕して溶剤を添加するか又は濾過しケーキを作成
して溶剤を浸透し、次いで圧延によりシートを成形し、
次に溶剤を界面活性剤の分解しない温度で加熱蒸発した
後シートを流動有機溶媒槽中に浸漬してシート中の界面
活性剤を溶出除去し、更に界面活性剤の分解温度以上に
加熱して界面活性剤を分解除去して反応層シートを作成
し、次いで前記反応層シートとガス拡散層シートを裁断
し、反応層シートのみに触媒を担持した後両シートを重
ね加熱加圧し一本化して電極を作成することを特徴とす
るガス拡散電極の製造方法。One method for producing a gas diffusion electrode of the present invention to solve the above problems SUMMARY OF THE INVENTION may, hydrophilic carbon black, a water-repellent carbon black, a surfactant polytetrafluoroethylene Add and mix, then filter and dry, pulverize to add the solvent or filter to make a cake and infiltrate the solvent, then form the sheet by rolling,
Then, after heating and evaporating the solvent at a temperature at which the surfactant does not decompose, the sheet is immersed in a fluidized organic solvent bath to elute and remove the surfactant in the sheet, and further heated to a temperature higher than the decomposition temperature of the surfactant. The reaction layer sheet is prepared by decomposing and removing the surfactant, then the reaction layer sheet and the gas diffusion layer sheet are cut, and after supporting the catalyst only on the reaction layer sheet, the both sheets are stacked and pressurized to form a single unit. A method for manufacturing a gas diffusion electrode, comprising forming an electrode.
【００１１】本発明のガス拡散電極の製造方法の他の１
つは、親水性カーボンブラック、撥水性カーボンブラッ
ク、ポリ四弗化エチレンに界面活性剤を添加して混合
し、次に濾過し乾燥、粉砕して溶剤を添加するか又は濾
過しケーキを作成して溶剤を浸透し、次いで圧延により
シートを成形し、次に溶剤を界面活性剤の分解しない温
度で加熱蒸発した後シートを流動有機溶媒槽中に浸漬し
て、シート中の界面活性剤を溶出除去し、更に界面活性
剤の分解温度以上に加熱して界面活性剤を分解除去して
反応層シートを作成し、一方撥水性カーボンブラック、
ポリ四弗化エチレンに界面活性剤を添加して混合し、次
に濾過し乾燥、粉砕して溶剤を添加するか又は濾過しケ
ーキを作成して溶剤を浸透し、次いで圧延によりシート
を成形し、次に溶剤を界面活性剤の分解しない温度で加
熱蒸発した後シートを流動有機溶媒槽中に浸漬してシー
ト中の界面活性剤を溶出除去し、更に界面活性剤の分解
温度以上に加熱して界面活性剤を分解除去してガス拡散
層シートを作成し、次いで前記反応層シートとガス拡散
層シートを裁断し、反応層シートのみに触媒を担持した
後両シートを重ね加熱加圧し一体化して電極を作成する
ことを特徴とするものである。Another one of the manufacturing methods of the gas diffusion electrode of the present invention.
First, add a surfactant to hydrophilic carbon black, water-repellent carbon black, and polytetrafluoroethylene and mix them, then filter, dry and pulverize to add a solvent or filter to form a cake. To form a sheet by rolling.Then, the solvent is heated and evaporated at a temperature that does not decompose the surfactant, and then the sheet is immersed in a flowing organic solvent bath to elute the surfactant in the sheet. Removed, and further heated above the decomposition temperature of the surfactant to decompose and remove the surfactant to create a reaction layer sheet, while water-repellent carbon black,
A surfactant is added to the polytetrafluoroethylene and mixed, then filtered, dried and pulverized to add a solvent or filtered to form a cake and impregnated with the solvent, and then formed into a sheet by rolling. Then, after the solvent is heated and evaporated at a temperature at which the surfactant is not decomposed, the sheet is immersed in a fluidized organic solvent bath to elute and remove the surfactant in the sheet, and further heated to a temperature higher than the decomposition temperature of the surfactant. The surfactant is decomposed and removed to form a gas diffusion layer sheet, and then the reaction layer sheet and the gas diffusion layer sheet are cut, and after carrying the catalyst only on the reaction layer sheet, both sheets are stacked and heated and pressed to be integrated. In which the electrode is formed.
【００１２】[0012]
【作用】上記のように本発明のガス拡散電極の製造方法
によれば、界面活性剤がポリ四弗化エチレン上に残るこ
とがないので、タール状のものが発生することがなく、
長時間使用しても気体の出入可能な微細な通路（撥水
部）に液体が浸入することがなく、従って電極の劣化が
なく、長寿命のガス拡散電極を得ることができる。According to the method for producing a gas diffusion electrode of the present invention as described above, the surfactant does not remain on the polytetrafluoroethylene, so that tar-like substances are not generated.
Even when used for a long time, the liquid does not enter the fine passage (water-repellent portion) through which gas can enter and exit, so that the electrode is not deteriorated and a long-life gas diffusion electrode can be obtained.
【００１３】[0013]
【実施例】本発明のガス拡散電極の製造方法の１つの一
実施例を説明すると、平均粒径420Åの親水性カーボン
ブラックと撥水性カーボンブラックと平均粒径 0.3μｍ
のポリ四弗化エチレン粉末を１：１：８の割合で配し、
これに界面活性剤、本例では商品名トライトンを５％の
割合で添加して混合し、次に濾過器に注入して濾過し、
乾燥、粉砕して溶剤本例ではソルベントナフサを 1.0：
2.0 の割合で添加し、次いで圧延により 0.4mm厚のシー
トを成形し、次にソルベントナフサを界面活性剤の分解
しない温度（60℃）で加熱蒸発した後、シートをトルエ
ン、ベンゼン、トリクロロエチレン、１，１，１−トリ
クロロエタン等の有機溶媒、本例ではトルエンが充填さ
れて流動している溶媒槽中に浸漬して、シート中の界面
活性剤であるトライトンを溶出除去し、更に 280℃に加
熱してトライトンを分解除去して反応層シートを作成
し、次いでこの反応層シートを 120mm× 120mmに裁断
し、白金族金属、その酸化物、それらの合金、卑金属酸
化物等の触媒、本例ではＰｔを担持し、 380℃、 500kg
／cm2 で加熱加圧して厚さ 0.4mmの電極を作成し、然る
後この電極の片面に網状（50メッシュ）の集電体を貼り
合わせた。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the method for producing a gas diffusion electrode according to the present invention will be described. A hydrophilic carbon black having an average particle diameter of 420 °, a water-repellent carbon black and an average particle diameter of 0.3 μm are described.
Of polytetrafluoroethylene powder in a ratio of 1: 1: 8,
To this, a surfactant, in this example, Triton (trade name) is added at a ratio of 5%, mixed and then injected into a filter and filtered.
Dry and pulverize the solvent. In this example, the solvent naphtha is 1.0:
Then, a 0.4 mm thick sheet was formed by rolling, and then the solvent naphtha was heated and evaporated at a temperature at which the surfactant was not decomposed (60 ° C.). , 1,1-organic solvents such as trichloroethane, was immersed in a solvent bath that toluene is flowing is filled in this example, the Triton is a surfactant in the sheet was eluted and removed, further heated to 280 ° C. To decompose and remove Triton to form a reaction layer sheet.Then, the reaction layer sheet is cut into 120 mm × 120 mm, and a catalyst such as a platinum group metal, an oxide thereof, an alloy thereof, or a base metal oxide, in this example, 380 ℃, 500kg carrying Pt
An electrode having a thickness of 0.4 mm was prepared by heating and pressurizing at / cm 2 , and then a net-like (50 mesh) current collector was bonded to one surface of the electrode.
【００１４】次に本発明のガス拡散電極の製造方法の他
の１つの一実施例を説明すると、前記実施例と同様に反
応層シートを作成する一方、平均粒径 420Åの撥水性カ
ーボンブラックと平均粒径 0.3μｍのポリ四弗化エチレ
ン粉末を７：３の割合で配し、これに界面活性剤、本例
では商品名トライトンを６％の割合で添加して混合し、
次に濾過器に注入して濾過し、乾燥、粉砕して、溶剤、
本例ではソルベントナフサを１：1.85の割合で添加し、
次いで圧延により 0.6mm厚のシートを成形し、次にソル
ベントナフサを界面活性剤の分解しない温度（80℃）で
加熱蒸発した後、シートを溶媒、本例ではベンゼンが充
填されて流動している溶媒槽中に浸漬して、シート中の
界面活性剤であるトライトンを溶出除去し、更に 280℃
に加熱してトライトンを分解除去してガス拡散層シート
を作成し、次いで前記反応層シートを 0.2mmとしたもの
とガス拡散層シートを120 mm× 120mmに裁断し、反応層
シートのみに触媒、本例ではＰｔ−Ｐｄ合金を担持した
後、両シートを重ね、380℃、 600kg／cm2 で加熱加圧
し一体化して厚さ 0.8mmの電極を作成し、然る後ガス拡
散層側の面に網状（50メッシュ）の集電体を貼り合わせ
た。Next, another embodiment of the method for producing a gas diffusion electrode according to the present invention will be described. A reaction layer sheet is prepared in the same manner as in the above embodiment, and water-repellent carbon black having an average particle diameter of 420 ° is used. A polytetrafluoroethylene powder having an average particle size of 0.3 μm is disposed in a ratio of 7: 3, and a surfactant, in this example, Triton (trade name in this example) is added at a ratio of 6% and mixed.
Then pour into a filter, filter, dry, pulverize, solvent,
In this example, solvent naphtha was added at a ratio of 1: 1.85,
Next, a 0.6 mm thick sheet is formed by rolling, and then the solvent naphtha is heated and evaporated at a temperature at which the surfactant is not decomposed (80 ° C.), and the sheet is filled with a solvent, in this example, benzene, and is flowing. Immerse in a solvent bath to elute and remove Triton, which is a surfactant, in the sheet.
To form a gas diffusion layer sheet by decomposing and removing Triton, and then cut the reaction layer sheet into 0.2 mm and the gas diffusion layer sheet into 120 mm x 120 mm, and catalyze only the reaction layer sheet. In this example, after supporting the Pt-Pd alloy, the two sheets were stacked, and heated and pressed at 380 ° C. and 600 kg / cm 2 to form an electrode having a thickness of 0.8 mm, and then the surface on the gas diffusion layer side. Then, a net-like (50 mesh) current collector was bonded.
【００１５】こうして得た２つの実施例のガス拡散電極
と従来の方法により得たガス拡散電極に、界面活性剤が
分解してタール状に残っているか否かを検査すべく、各
ガス拡散電極をアルカリ溶液、本例では25％ＫＯＨ溶液
中に浸漬した処、従来の方法により得たガス拡散電極で
はアルカリ溶液がかっ色となってタール状のものが溶け
出し、界面活性剤が残っていることが判明したが、実施
例のガス拡散電極ではアルカリ溶液が全く変色せず、界
面活性剤が全く残っていないことが判明した。尚、上記
実施例ではガス拡散電極の片面に網状の集電体を貼り合
わせたが、この集電体は必須のものではない。またガス
拡散層を設けた電極の場合、集電体をガス拡散層内に設
けてもよいものである。The gas diffusion electrodes of the two examples thus obtained and the gas diffusion electrodes obtained by the conventional method were inspected to determine whether the surfactant was decomposed and remained in the form of tar. Was immersed in an alkaline solution, in this example, a 25% KOH solution, and the gas diffusion electrode obtained by the conventional method turns the alkaline solution into a brown color, the tar-like substance is dissolved, and the surfactant remains. However, it was found that in the gas diffusion electrode of the example, the alkali solution did not discolor at all, and no surfactant remained. In the above embodiment, a net-like current collector is bonded to one side of the gas diffusion electrode, but this current collector is not essential. In the case of an electrode provided with a gas diffusion layer, the current collector may be provided inside the gas diffusion layer.
【００１６】[0016]
【発明の効果】以上の通り本発明のガス拡散電極の製造
方法によれば、界面活性剤をポリ四弗化エチレン上から
完全に除去できて、タール状のものが発生することがな
いので、長時間使用しても気体の出入可能な微細な通路
（撥水部）に液体が浸入することがなく、従って電極の
劣化のない長寿命のガス拡散電極を得ることができる。As described above, according to the method for producing a gas diffusion electrode of the present invention, the surfactant can be completely removed from the polytetrafluoroethylene, and no tar-like substance is generated. Even when used for a long time, the liquid does not enter the fine passage (water-repellent portion) through which gas can enter and exit, so that a long-life gas diffusion electrode without electrode deterioration can be obtained.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 4/86 - 4/98 C25B 11/03 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) H01M 4/86-4/98 C25B 11/03
Claims (2)
ンブラック、ポリ四弗化エチレンに界面活性剤を添加し
て混合し、次に濾過し乾燥、粉砕して溶剤を添加するか
又は濾過しケーキを作成して溶剤を浸透し、次いで圧延
によりシートを成形し、次に溶剤を界面活性剤の分解し
ない温度で加熱蒸発した後、シートを流動有機溶媒槽中
に浸漬してシート中の界面活性剤を溶出除去し、更に界
面活性剤の分解温度以上に加熱して界面活性剤を分解除
去して反応層シートを作成し、次いでこの反応層シート
を裁断し、触媒の担持と加熱加圧をいずれかより先に行
って電極を作成することを特徴とするガス拡散電極の製
造方法。1. A hydrophilic carbon black, a water-repellent carbon black, a surfactant and adding and mixing the polytetrafluoroethylene, then filtered and dried, whether or filtered cake ground to the addition of solvent After forming and infiltrating the solvent, the sheet is formed by rolling, and then the solvent is heated and evaporated at a temperature at which the surfactant is not decomposed, and then the sheet is immersed in a fluidized organic solvent bath to form the surfactant in the sheet. Is eluted and removed, and further heated to a temperature equal to or higher than the decomposition temperature of the surfactant to decompose and remove the surfactant to form a reaction layer sheet. Producing a gas diffusion electrode in advance.
ンブラック、ポリ四弗化エチレンに界面活性剤を添加し
て混合し、次に濾過し乾燥、粉砕して溶剤を添加するか
又は濾過しケーキを作成して溶剤を浸透し、次いで圧延
によりシートを成形し、次に溶剤を界面活性剤の分解し
ない温度で加熱蒸発した後シートを流動有機溶媒槽中に
浸漬してシート中の界面活性剤を溶出除去し、更に界面
活性剤の分解温度以上に加熱して界面活性剤を分解除去
して反応層シートを作成し、一方撥水カーボンブラッ
ク、ポリ四弗化エチレンに界面活性剤を添加して混合
し、次に濾過し乾燥、粉砕して溶剤を添加するか又は濾
過しケーキを作成して溶剤を浸透し、次いで圧延により
シートを成形し、次に溶剤を界面活性剤の分解しない温
度で加熱蒸発した後シートを流動有機溶媒槽中に浸漬し
てシート中の界面活性剤を溶出除去し、更に界面活性剤
の分解温度以上に加熱して界面活性剤を分解除去してガ
ス拡散層シートを作成し、次いで前記反応層シートとガ
ス拡散層シートを裁断し、反応層シートのみに触媒を担
持した後両シートを重ね加熱加圧し一体化して電極を作
成することを特徴とするガス拡散電極の製造方法。2. A hydrophilic carbon black, a water-repellent carbon black, and a polytetrafluoroethylene, to which a surfactant is added and mixed, and then filtered, dried and pulverized, and a solvent is added or the cake is filtered. Prepare and infiltrate the solvent, then form the sheet by rolling, then heat and evaporate the solvent at a temperature that does not decompose the surfactant, then immerse the sheet in a flowing organic solvent tank to remove the surfactant in the sheet eluted removed, further heated to a temperature higher than the decomposition temperature of the surfactant surfactant was decomposed and removed to create a reaction layer sheet, whereas water repellent carbon black, by adding a surfactant to the polytetrafluoroethylene Mix, then filter and dry, pulverize and add solvent or filter to make a cake and infiltrate the solvent, then form the sheet by rolling, then remove the solvent at a temperature that does not decompose the surfactant. After heating and evaporation Immersed in a fluidized organic solvent bath to elute and remove the surfactant in the sheet, and further heated above the decomposition temperature of the surfactant to decompose and remove the surfactant to create a gas diffusion layer sheet, Next, the reaction layer sheet and the gas diffusion layer sheet are cut, a catalyst is supported on only the reaction layer sheet, and then both sheets are stacked, heated and pressurized to form an electrode, thereby producing an electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03309726A JP3107245B2 (en) | 1991-10-29 | 1991-10-29 | Manufacturing method of gas diffusion electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03309726A JP3107245B2 (en) | 1991-10-29 | 1991-10-29 | Manufacturing method of gas diffusion electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05121078A JPH05121078A (en) | 1993-05-18 |
| JP3107245B2 true JP3107245B2 (en) | 2000-11-06 |
Family
ID=17996562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03309726A Expired - Fee Related JP3107245B2 (en) | 1991-10-29 | 1991-10-29 | Manufacturing method of gas diffusion electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3107245B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003338289A (en) * | 2002-03-15 | 2003-11-28 | Choichi Furuya | Dispersion for gas diffusion electrode and method for producing the same |
| JP2007194004A (en) * | 2006-01-18 | 2007-08-02 | Asahi Glass Co Ltd | Method for producing gas diffusion layer for polymer electrolyte fuel cell and membrane electrode assembly |
| CN115377439B (en) * | 2022-09-22 | 2025-04-25 | 深圳市通用氢能科技有限公司 | A method for preparing a gas diffusion layer with enhanced water management capability and application of the gas diffusion layer in a fuel cell |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4229490A (en) | 1978-09-01 | 1980-10-21 | Texas Instruments Incorporated | Novel method for catalyst application to a substrate for fuel cell electrodes |
-
1991
- 1991-10-29 JP JP03309726A patent/JP3107245B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4229490A (en) | 1978-09-01 | 1980-10-21 | Texas Instruments Incorporated | Novel method for catalyst application to a substrate for fuel cell electrodes |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05121078A (en) | 1993-05-18 |
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