JPH0325856A - Manufacture of electrode for fuel cell - Google Patents
Manufacture of electrode for fuel cellInfo
- Publication number
- JPH0325856A JPH0325856A JP1159926A JP15992689A JPH0325856A JP H0325856 A JPH0325856 A JP H0325856A JP 1159926 A JP1159926 A JP 1159926A JP 15992689 A JP15992689 A JP 15992689A JP H0325856 A JPH0325856 A JP H0325856A
- Authority
- JP
- Japan
- Prior art keywords
- silicon carbide
- sheet
- polytetrafluoroethylene
- fuel cell
- carbide whiskers
- 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
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 20
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 17
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 17
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical class [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 10
- 239000003054 catalyst Substances 0.000 claims abstract description 8
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 7
- 239000003456 ion exchange resin Substances 0.000 claims abstract description 5
- 229920003303 ion-exchange polymer Polymers 0.000 claims abstract description 5
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims description 4
- 238000010008 shearing Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 4
- 239000005011 phenolic resin Substances 0.000 abstract description 3
- 239000011347 resin Substances 0.000 abstract description 3
- 229920005989 resin Polymers 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 2
- 239000007849 furan resin Substances 0.000 abstract description 2
- 239000003960 organic solvent Substances 0.000 abstract description 2
- 239000004615 ingredient Substances 0.000 abstract 2
- 229910010271 silicon carbide Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
- 239000005518 polymer electrolyte Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- 229920006361 Polyflon Polymers 0.000 description 2
- 241000872198 Serjania polyphylla Species 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229940057995 liquid paraffin Drugs 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 230000002940 repellent Effects 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- HUVSHHCYCJKXBZ-UHFFFAOYSA-N 2,3-bis(ethenyl)benzenesulfonic acid;styrene Chemical compound C=CC1=CC=CC=C1.OS(=O)(=O)C1=CC=CC(C=C)=C1C=C HUVSHHCYCJKXBZ-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 229920000557 Nafion® Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003011 anion exchange membrane Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
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
- Inert Electrodes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、固体高分子電解質型（ＳＰＥ型）の燃料電池
に用いる電極の製造方法に関する．〔従来の技術〕
燃料電池は電解質の種類によって分頻されているが、電
解賞がカチオン交換膜あるいはアニオン交換膜などの固
体高分子で構威される燃料電池は固体高分子電解質型（
ＳＰＥ型： ５６１ｉｄ ＰｏｌｙｍｅｒＥｌｅｃｔｏ
ｌｙｔｅ）と呼ばれて他の燃料電池と区別されている．
このＳＰＥ型燃料電池に用いられる電極の製造方法には
、カーボン粉末と触媒粉末にバインダーおよび撥水剤と
して機能するポリテトラフルオロエチレンを混合して固
体高分子電解質とともにホットプレスする方法、固体高
分子電解質となるイオン交換膜の表面に化学メッキ法で
触媒金属を析出させる方法が知られているが、後者はカ
ーボンあるいは酸化物などの添加威分を結合しにくい難
点があるため前者のホットプレス法が主流となっている
．
〔発明が解決しようとする課題〕
しかしながら、カーボン粉末、白金触媒およびポリテト
ラフルオロエチレンの三戒分を原料としてポットプレス
法で製造した電極は、気孔率が低く、気孔径も一定化し
ない問題点がある．このため、電極材料として圧損が大
きく、ガス流路を別に形戒する必要が生じるなどの関係
で、効率およびコンパクト化の点で不利な面がある．し
たがって、本発明の目的はカーボン粉末、白金触媒およ
びポリテトラフルオロエチレンを主体成分として、優れ
た気孔率と均質な気孔径を備えるシート状のＳＰＥ型燃
料電池用電極を製造するための方法を提供するところに
ある．
〔課題を解決するための手段〕
上記の目的を達威するための本発明による燃料電池用電
極の製造方法は、カーボン粉末、白金触媒およびポリテ
トラフルオロエチレン（ＰＴＦＥ）からなる戒分系に、
表面を炭素膜で被覆した炭化けい素ウィスカーを加えて
混練し、混線物をシート化したのち熱処理、イオン交換
樹脂処理を施すことを構戒上の特徴とするものである．
カーボン粉末としては、比表面積が大きくストラクチャ
ーの発達した導電性のカーボンブラックが好適に使用さ
れる．白金触媒には、粒径０．５〜１．０μ一の白金黒
が用いられる。ポリテトラフルオロエチレン（ＰＴＦＥ
）はバインダーおよび撥水剤として機能する成分である
が、本発明ではこれを気孔形或剤としての利用が図られ
る．このため、剪断力を加えることにより繊維化する特
性をもつポリテトラフルオ口エチレンを選択使用するこ
とが望ましい態様となる．繊維化可能なポリテトラフル
オロエチレンとしては、例えば三井デュポンフロロケミ
カル■製の“テフロンＫ−１０Ｊ″、ダイキン工業■製
の“ポリフロンＦ−１０３”Ｆ−２０２″等を挙げるこ
とができる。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing an electrode used in a solid polymer electrolyte type (SPE type) fuel cell. [Prior Art] Fuel cells are classified according to the type of electrolyte, but fuel cells whose electrolyte is composed of solid polymers such as cation exchange membranes or anion exchange membranes are of the solid polymer electrolyte type (
SPE type: 561id PolymerElecto
lyte) to distinguish it from other fuel cells. Methods for manufacturing the electrodes used in this SPE fuel cell include a method in which carbon powder and catalyst powder are mixed with polytetrafluoroethylene, which functions as a binder and a water repellent, and hot-pressed together with a solid polymer electrolyte; A known method is to deposit catalytic metals on the surface of an ion-exchange membrane, which serves as an electrolyte, by chemical plating, but the latter method has the disadvantage of making it difficult to bind additives such as carbon or oxides, so the hot pressing method of the former is difficult. has become the mainstream. [Problem to be solved by the invention] However, electrodes manufactured by the pot press method using carbon powder, platinum catalyst, and polytetrafluoroethylene as raw materials have a problem that the porosity is low and the pore diameter is not constant. There is. For this reason, there are disadvantages in terms of efficiency and compactness, as the electrode material has a large pressure drop and the gas flow path must be designed separately. Therefore, an object of the present invention is to provide a method for producing a sheet-shaped SPE fuel cell electrode having excellent porosity and uniform pore diameter, which is mainly composed of carbon powder, platinum catalyst, and polytetrafluoroethylene. It's there. [Means for Solving the Problems] A method for producing a fuel cell electrode according to the present invention to achieve the above-mentioned object includes a chemical system consisting of carbon powder, a platinum catalyst, and polytetrafluoroethylene (PTFE);
The constructional feature is that silicon carbide whiskers whose surfaces are covered with a carbon film are added and kneaded, and the mixture is made into a sheet, which is then subjected to heat treatment and ion exchange resin treatment. As the carbon powder, conductive carbon black with a large specific surface area and a developed structure is preferably used. As the platinum catalyst, platinum black with a particle size of 0.5 to 1.0 μm is used. Polytetrafluoroethylene (PTFE)
) is a component that functions as a binder and water repellent, but in the present invention it is intended to be used as a pore-forming agent. For this reason, it is desirable to select and use polytetrafluoroethylene, which has the property of forming into fibers by applying shearing force. Examples of the polytetrafluoroethylene that can be made into fibers include "Teflon K-10J" manufactured by DuPont Mitsui Fluorochemicals (■) and "Polyflon F-103" (F-202) manufactured by Daikin Industries (■).
これらの成分系に加えられる表面を炭素膜で被覆した炭
化けい素ウィスカーは、炭化けい素ウィスカーをフェノ
ール系樹脂、フラン系樹脂のような高炭化性の樹脂溶液
やピッチを有機溶媒に溶かした溶液などに分散させたの
ち濾過、乾燥し、これを不活性雰囲気下で１８００℃程
度の温度域で焼戒処理することによって形威することが
できる．使用する炭化けい素ウィスカーは可及的に直径
およびアスベクト比の均等なものであることがよく、と
くに直径０．３〜０．６ ａ■、長さ３０〜６０ｕＩＭ
の性状範囲を選択することが好ましい．また、表面を炭
素膜で被覆した炭化けい素ウィスカーの添加量は、カー
ボン粉末、白金触媒およびポリテトラフルオロエチレン
の戒分量に対し１００〜３００重量％の範囲に設定する
ことが望ましく、この範囲を外れると気孔率を向上させ
る効果が減退する．上記の原料或分は、捏合機のような
混練装置に入れて十分な剪断力を与えながら混練する．
この際、混練助剤として流動バラフィン、液状ポリエチ
レングリコール等を添加することができる。Silicon carbide whiskers whose surfaces are coated with a carbon film can be added to these component systems by dissolving silicon carbide whiskers in a highly carbonizable resin solution such as phenolic resin or furan resin, or in a solution of pitch dissolved in an organic solvent. After dispersing it in water, it can be filtered and dried, and then burned in an inert atmosphere at a temperature of about 1800°C. The silicon carbide whiskers used are preferably of uniform diameter and aspect ratio, especially those with a diameter of 0.3 to 0.6 a and a length of 30 to 60 uIM.
It is preferable to select a range of properties. In addition, it is desirable to set the amount of silicon carbide whiskers whose surface is coated with a carbon film in the range of 100 to 300% by weight based on the amount of carbon powder, platinum catalyst, and polytetrafluoroethylene. If it is removed, the effect of improving porosity will be reduced. A certain amount of the above raw materials are put into a kneading device such as a kneader and kneaded while applying sufficient shearing force.
At this time, liquid paraffin, liquid polyethylene glycol, etc. can be added as a kneading aid.
混線物のシート化は、通常の抄紙法、ドクターブレード
法のようなシート化手段を用いておこなうことができる
．
威形されたシートは、ついで不活性気流中で３４０℃前
後の温度で熱処理し、必要に応じてプレスする．このシ
ートには最終的にイオン交換樹脂処理が施される．イオ
ン交換樹脂処理は、スチレンージビニルベンゼンスルフ
ォン酸粉末、バーフルオロカーボンスルフォン酸の低級
脂肪族アルコールなどと水との混合溶媒溶液（ナフイオ
ン溶液）を上記シートに含浸する方法によっておこなわ
れる．
〔作 用〕
本発明において原料或分として添加される微小繊維状の
炭化けい素ウィスカーは、組織の気孔形成化に機能し、
表面層の炭素膜が電極の性能向上に寄与する．とくに繊
維化性のポリテトラフルオ口エチレンを使用した場合に
は、これが混練過程の剪断力で繊維化して上記した炭化
けい素ウィスカーによる気孔形或化を助長するとともに
、相互の絡み現象により多孔組織を強化する作用を発揮
する．また、ポリテトラフルオ口エチレンの繊維化時に
はカーボンブラックが織維表面に付着してネットを形或
するため、導電性を増大させる働きもなす．
これらの相乗的な作用を介して優れた気孔率と均質な粒
子径を有する高ＩＩＦ：性のシート電極が形威される．
また、得られたシートは適度の柔軟性を有しており、セ
ル組立の面でも有利となる。The mixed material can be made into a sheet using conventional paper-making methods, doctor blade methods, and other sheet-forming methods. The shaped sheet is then heat treated at a temperature of around 340°C in an inert air stream and pressed if necessary. This sheet is finally treated with an ion exchange resin. The ion exchange resin treatment is carried out by impregnating the sheet with a mixed solvent solution (nafion solution) of water and styrene-divinylbenzenesulfonic acid powder, lower aliphatic alcohol of barfluorocarbonsulfonic acid, etc. [Function] The microfibrous silicon carbide whiskers added as a part of the raw material in the present invention function to form pores in the tissue,
The carbon film on the surface layer contributes to improving the performance of the electrode. In particular, when fibrous polytetrafluoroethylene is used, it becomes fibrous due to the shearing force during the kneading process, which promotes the formation of pores by the silicon carbide whiskers described above, and also forms a porous structure due to the mutual entanglement phenomenon. It has the effect of strengthening the Furthermore, when polytetrafluoroethylene is made into fibers, carbon black adheres to the surface of the woven fibers and forms a net, which also serves to increase electrical conductivity. Through these synergistic effects, a high IIF: sheet electrode with excellent porosity and uniform particle size is produced. Furthermore, the obtained sheet has appropriate flexibility, which is advantageous in terms of cell assembly.
以下、本発明の実施例を比較例と対比して説明する．
実施例１〜６
（１）直径０．３〜０．６μ―、長さ３０〜６０μ■の
炭化けい素ウィスカー５０ｇをフェノール樹脂〔群栄化
学■製、”ＰＧＡ−４５０８″〕のエタノール溶液５０
〇一に投入して十分に攪拌分散させたのち濾過し、１０
０〜１５０″Ｃで２時間乾燥した．ついでこれをアルゴ
ンガス゜気流中で３０分間焼威して樹脂威分を炭化し、
表面に炭素膜を形威した．
各例の変更条件は、第１表のとおりである．第１表
（２）上記の表面に炭素膜を被覆した炭化けい素ウィス
カー２５ｇを、導電性カーボンブラック〔東海カーボン
■製、“トーカブランク”３ Ｂ．Ｏｇ、粒径０．５〜
１．０ｐ■の白金黒２．５ｇおよびポリテトラフルオロ
エチレン〔ダイキン工業■製、“ポリフロンＦ−１０４
”）２．０ｇとともにエタノール１００−に入れ、超音
波をかけながら５分間保持して均一に混合した．混合物
を小型捏合機に投入し、助剤として流動パラフィンおよ
び液状ポリエチレングリコール２５ｇを添加して混練し
た．この段階でポリテトラフルオロエチレンは繊維化し
た．
助剤をトルエンで一旦抽出除去したのちカーターξキサ
ーで解体し、再びエタノール２０〇一中で超音波により
十分に分散した．ついで分散液を、３５μ一のナイロン
網を用いて抄紙してシートに或形した．このシートを５
０〜８０℃で乾燥後、アルゴン気流中で３３０〜３５０
℃の温度域で約１時間熱処理し、さらに加圧プレスして
縦横１００一一、厚さ０．１５ｍ−のシートに作威した
．
このシートをパーフルオロカーボンスルフォン酸の低級
脂肪族アルコールによる５％水溶液に浸漬し、１００℃
以下の温度で乾燥してＳＰＥ型燃料電池用の電極を製造
した．
このようにして得られた各電極の特性ならびにセル性能
を第２表に示した．
比較例１〜２
実施例と同一の導電性カーボンブラック２５．０ｇ、白
金黒粉末２．５ｇ、ポリテトラフルオロエチレン６．２
ｇ を底分系とし、以後の工程を実施例と同一にして
２種類のＳＰＥ型燃料電池用電極を作威した．この電極
の特性ならびにセル性能を、第２表に併せて示した．
Ｃ発明の効果〕
本発明によれば、常に気孔率が大きく気孔径が揃った高
強度で適度の柔軟性を備えるシート性状の固体高分子電
解質型（ＳＰＥ型）燃料電池用電極を容易に製造するこ
とが可能となる．したがって、組織的にガス拡散性に優
れているから、ガス流路を介設することなしに高度の電
池効率を得ることができる．Examples of the present invention will be explained below in comparison with comparative examples. Examples 1 to 6 (1) 50g of silicon carbide whiskers with a diameter of 0.3 to 0.6μ and a length of 30 to 60μ were added to an ethanol solution of phenolic resin [manufactured by Gunei Chemical Co., Ltd., "PGA-4508"].
〇 Pour the mixture into 100 ml and stir well to disperse it, then filter it.
It was dried at 0 to 150"C for 2 hours. Then, it was burned in an argon gas stream for 30 minutes to carbonize the resin content.
A carbon film is formed on the surface. The change conditions for each example are shown in Table 1. Table 1 (2) 25 g of the silicon carbide whiskers whose surfaces were coated with a carbon film were mixed with conductive carbon black [manufactured by Tokai Carbon ■, "Toka Blank" 3 B. Og, particle size 0.5~
2.5 g of platinum black of 1.0 p■ and polytetrafluoroethylene [manufactured by Daikin Industries, Ltd., "Polyflon F-104"
2.0g of the mixture was placed in 100-g of ethanol and held for 5 minutes while applying ultrasonic waves to mix uniformly.The mixture was placed in a small kneading machine, and 25g of liquid paraffin and liquid polyethylene glycol were added as auxiliaries. The polytetrafluoroethylene was kneaded. At this stage, the polytetrafluoroethylene was made into fibers. After the auxiliary agent was once extracted and removed with toluene, it was disintegrated with a Carter ξ mixer and thoroughly dispersed again using ultrasonic waves in 200 ml of ethanol.Then, the dispersion liquid was was made into a sheet using a 35μ nylon mesh.This sheet was
After drying at 0-80℃, 330-350℃ in argon stream
It was heat treated at a temperature range of 100°C for about 1 hour, and then pressed under pressure to form a sheet with dimensions of 100 mm in length and width and 0.15 m in thickness. This sheet was immersed in a 5% aqueous solution of perfluorocarbon sulfonic acid in a lower aliphatic alcohol at 100°C.
An electrode for an SPE fuel cell was manufactured by drying at the following temperature. Table 2 shows the characteristics of each electrode and cell performance obtained in this way. Comparative Examples 1 to 2 25.0 g of conductive carbon black, 2.5 g of platinum black powder, and 6.2 g of polytetrafluoroethylene as in the example.
Using g as the bottom fraction system, two types of SPE type fuel cell electrodes were produced using the same subsequent steps as in the example. The characteristics of this electrode and cell performance are also shown in Table 2. C. Effects of the Invention According to the present invention, it is possible to easily produce a solid polymer electrolyte (SPE type) fuel cell electrode in the form of a sheet with high porosity, uniform pore diameter, high strength, and appropriate flexibility. It becomes possible to do so. Therefore, since it has structurally excellent gas diffusivity, a high level of cell efficiency can be obtained without intervening a gas flow path.
Claims (1)
エチレン（ＰＴＦＥ）からなる成分系に、表面を炭素膜
で被覆した炭化けい素ウィスカーを加えて混練し、混練
物をシート化したのち熱処理、イオン交換樹脂処理を施
すことを特徴とする燃料電池用電極の製造方法。 ２、剪断力を加えることにより繊維化する特性のポリテ
トラフルオロエチレンを用いる請求項１記載の燃料電池
用電極の製造方法。[Claims] 1. Silicon carbide whiskers whose surfaces are covered with a carbon film are added to a component system consisting of carbon powder, a platinum catalyst, and polytetrafluoroethylene (PTFE) and kneaded, and the kneaded product is formed into a sheet. A method for producing an electrode for a fuel cell, which is characterized by subjecting it to subsequent heat treatment and ion exchange resin treatment. 2. The method for producing an electrode for a fuel cell according to claim 1, wherein polytetrafluoroethylene is used which has the property of becoming fibrous when subjected to shearing force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1159926A JPH0697612B2 (en) | 1989-06-22 | 1989-06-22 | Method for manufacturing fuel cell electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1159926A JPH0697612B2 (en) | 1989-06-22 | 1989-06-22 | Method for manufacturing fuel cell electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0325856A true JPH0325856A (en) | 1991-02-04 |
| JPH0697612B2 JPH0697612B2 (en) | 1994-11-30 |
Family
ID=15704172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1159926A Expired - Lifetime JPH0697612B2 (en) | 1989-06-22 | 1989-06-22 | Method for manufacturing fuel cell electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0697612B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0722034A (en) * | 1993-06-30 | 1995-01-24 | Sanyo Electric Co Ltd | Manufacture of solid polyelectrolyte fuel cell electrode |
| US7094492B2 (en) | 2001-10-11 | 2006-08-22 | Honda Giken Kogyo Kabushiki Kaisha | Electrode for polymer electrolyte fuel cell |
| JP2007115574A (en) * | 2005-10-21 | 2007-05-10 | Aisin Chem Co Ltd | Gas diffusion layer for fuel cell electrode and its manufacturing method |
| JP2007257886A (en) * | 2006-03-20 | 2007-10-04 | Toyota Motor Corp | Fuel cell, and method for fabrication same |
-
1989
- 1989-06-22 JP JP1159926A patent/JPH0697612B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0722034A (en) * | 1993-06-30 | 1995-01-24 | Sanyo Electric Co Ltd | Manufacture of solid polyelectrolyte fuel cell electrode |
| US7094492B2 (en) | 2001-10-11 | 2006-08-22 | Honda Giken Kogyo Kabushiki Kaisha | Electrode for polymer electrolyte fuel cell |
| JP2007115574A (en) * | 2005-10-21 | 2007-05-10 | Aisin Chem Co Ltd | Gas diffusion layer for fuel cell electrode and its manufacturing method |
| JP2007257886A (en) * | 2006-03-20 | 2007-10-04 | Toyota Motor Corp | Fuel cell, and method for fabrication same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0697612B2 (en) | 1994-11-30 |
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