JP3434738B2 - Method for producing gas diffusion electrode material - Google Patents
Method for producing gas diffusion electrode materialInfo
- Publication number
- JP3434738B2 JP3434738B2 JP18608299A JP18608299A JP3434738B2 JP 3434738 B2 JP3434738 B2 JP 3434738B2 JP 18608299 A JP18608299 A JP 18608299A JP 18608299 A JP18608299 A JP 18608299A JP 3434738 B2 JP3434738 B2 JP 3434738B2
- Authority
- JP
- Japan
- Prior art keywords
- dispersion
- carbon black
- gas diffusion
- diffusion electrode
- added
- 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
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
- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Inert Electrodes (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ガス拡散電極の反
応層又はガス供給層に使用するカーボンブラックとポリ
テトラフルオロエチレン（ＰＴＦＥ）との混合物、ある
いは銀とＰＴＦＥの混合物等の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a mixture of carbon black and polytetrafluoroethylene (PTFE) used for a reaction layer or a gas supply layer of a gas diffusion electrode or a mixture of silver and PTFE.
【０００２】[0002]
【従来の技術】従来、ガス拡散電極の反応層の製造方法
においては、まず親水性カーボンブラックを界面活性剤
を加えた水に分散させ、銀等の微粒子触媒を担持又は添
加し、次いで疎水性カーボンブラックを加え分散させた
後、ＰＴＦＥディスパージョンを添加、混合して分散液
を調製していた。次に、これらの分散液にアルコールを
添加することによって自己組織化させ、濾過、乾燥させ
て反応層粉末又はガス供給層粉末を得ていた。2. Description of the Related Art Conventionally, in a method for producing a reaction layer of a gas diffusion electrode, first, hydrophilic carbon black is dispersed in water containing a surface active agent, and a fine particle catalyst such as silver is supported or added, and then a hydrophobic layer is added. After carbon black was added and dispersed, PTFE dispersion was added and mixed to prepare a dispersion liquid. Next, alcohol was added to these dispersions for self-assembly, filtration and drying to obtain a reaction layer powder or a gas supply layer powder.
【０００３】[0003]
【発明が解決しようとする課題】従来の方法では、上述
した様にカーボンブラックに重量比で３０倍以上の大量
の水と２％以上の界面活性剤を添加して分散液を作製
し、この分散液にＰＴＦＥディスパージョンを添加混合
していた。これに液量と同量のアルコールを添加して凝
集、濾過して反応層粉末又はガス供給層粉末を作製して
いた。安価に製造する為には、副原料である水と界面活
性剤及びアルコールの使用量を減らす必要がある。これ
らの使用量が減れば、全体の処理量が減るので設備の小
型化によるコスト削減が可能である。更に、粉末にせず
に分散液のまま塗布して膜状にする塗布法、スプレーし
て膜状にするスプレー法、スプレードライ法で粉末にす
る場合にも溶液の量が多いために、この溶液を除去する
のにエネルギーを多大に要する欠点があったので、使用
する水と界面活性剤の量を出来るだけ低減することが望
まれていた。特に、界面活性剤の使用量が多いと、後工
程での除去、廃棄物処理が容易でないので、使用量の低
減が強く望まれていた。According to the conventional method, as described above, a large amount of water 30% by weight or more and 2% or more surfactant are added to carbon black to prepare a dispersion liquid. The PTFE dispersion was added to and mixed with the dispersion liquid. The same amount of alcohol as the liquid amount was added to this, and the mixture was aggregated and filtered to prepare a reaction layer powder or a gas supply layer powder. In order to manufacture at low cost, it is necessary to reduce the amounts of auxiliary materials such as water, surfactant and alcohol. If the amount of use of these is reduced, the total amount of processing is reduced, so that it is possible to reduce the cost by downsizing the equipment. Furthermore, since the amount of the solution is large even when the dispersion liquid is applied as it is to form a film by spraying the dispersion, a spray method of spraying into a film, or a spray dry method, the amount of the solution is large. Since there is a drawback that a large amount of energy is required to remove the water, it has been desired to reduce the amount of water and the surfactant used as much as possible. In particular, when the amount of the surfactant used is large, it is not easy to remove it in a later step and to treat the waste, so that it has been strongly desired to reduce the amount used.
【０００４】本発明は、このような従来の課題に鑑みて
なされたものであり、水と界面活性剤をできるだけ使用
せずに、設備の小型化によるコスト削減が可能で、省エ
ネルギーにも貢献できかつ製造時間の短縮ができる、ガ
ス拡散電極原料の製造方法を提供することを目的とす
る。The present invention has been made in view of such conventional problems, and it is possible to reduce the cost by downsizing the equipment without using water and a surfactant as much as possible and contribute to energy saving. Moreover, it is an object of the present invention to provide a method for producing a gas diffusion electrode raw material, which can shorten the production time.
【０００５】[0005]
【課題を解決するための手段】従来の方法では、水にカ
ーボンブラックを分散させるために、界面活性剤が必要
であった。そこで本発明者は、前記課題を解決すべく鋭
意検討を行い、界面活性剤を用いずにガス拡散電極材料
を分散出来る溶媒として、アルコールに注目した。水で
湿潤しない疎水性カーボンブラックも、アルコールには
良好に湿潤する。カーボンブラックをアルコールに湿潤
分散した液に、ＰＴＦＥディスパージョンを添加混合す
ると、アルコールがＰＴＦＥディスパージョンの分散媒
の水に拡散する際に、カーボンブラックがＰＴＦＥディ
スパージョンの間隙に侵入し、ガス拡散電極としての望
ましい分散構造となることを知見した。すなわち、アル
コールに分散したカーボンブラックにＰＴＦＥディスパ
ージョンを混合すると、自己組織化して良好な反応層構
造になることを見出して本発明を完成するに至った。In the conventional method, a surfactant was required to disperse carbon black in water. Therefore, the present inventor has conducted diligent studies to solve the above problems, and paid attention to alcohol as a solvent that can disperse the gas diffusion electrode material without using a surfactant. Hydrophobic carbon black that is not wet with water also wets well with alcohol. When PTFE dispersion is added to and mixed with a liquid in which carbon black is wet-dispersed in alcohol, when the alcohol diffuses into the water of the dispersion medium of the PTFE dispersion, carbon black penetrates into the gaps of the PTFE dispersion and the gas diffusion electrode It was found that the desired dispersion structure is obtained. That is, the present invention has been completed by finding that when PTFE dispersion is mixed with carbon black dispersed in alcohol, it self-assembles into a favorable reaction layer structure.
【０００６】すなわち、本発明は、次の手段により前記
の課題を解決した。（１）ポリテトラフルオロエチレン
を除いたガス拡散電極材料を水溶性の有機溶媒に分散さ
せ、その分散液にポリテトラフルオロエチレンディスパ
ージョンを添加混合することを特徴とするガス拡散電極
の反応層又はガス供給層原料の製造方法。（２）前記有
機溶媒がメタノール、エタノール、イソプロピルアルコ
ール、エチレングリコール、グリセリン、アセトンより
なる群から選ばれる前記（１）記載の製造方法。That is, the present invention has solved the above problems by the following means. (1) A reaction layer of a gas diffusion electrode, characterized in that a gas diffusion electrode material excluding polytetrafluoroethylene is dispersed in a water-soluble organic solvent, and polytetrafluoroethylene dispersion is added and mixed to the dispersion. Method for producing gas feed layer raw material. (2) The production method according to (1) above, wherein the organic solvent is selected from the group consisting of methanol, ethanol, isopropyl alcohol, ethylene glycol, glycerin, and acetone.
【０００７】[0007]
【発明の実施の形態】ガス拡散電極の反応層用材料の分
散液は、親水性カーボンブラックと疎水性カーボンブラ
ックをアルコールと混合することにより調製する。アル
コールの量は、カーボンブラック１部（重量、以下同
様）に対して９〜２０部である。この量で混合すると、
ぱさぱさの状態から液体状態になる。よく混練した後、
超音波のホーンを直接混合物に当てる。アルコールに超
音波を照射しながら、カーボンブラックを少しづつ加え
ても良い。次にこのカーボンブラックの分散液にＰＴＦ
Ｅディスパージョンを必要量加えて、攪拌分散させる。
必要なら超音波照射してもよい。カーボンブラックが分
散できる程度に使用するアルコールに水分が含まれても
良い。ＰＴＦＥディスパージョンは、原液で用いると餅
状に成るので、水で希釈すると液状にすることが出来
る。必要に応じ界面活性剤を添加しても良い。両液が混
合した状態ではカーボンブラックとＰＴＦＥ微粒子とが
混在した状態となっているが、カーボンブラック分散液
のアルコールがＰＴＦＥディスパージョンに作用して、
ＰＴＦＥディスパージョンの自己組織化が生じるものと
みられる。BEST MODE FOR CARRYING OUT THE INVENTION A dispersion of a material for a reaction layer of a gas diffusion electrode is prepared by mixing hydrophilic carbon black and hydrophobic carbon black with alcohol. The amount of alcohol is 9 to 20 parts with respect to 1 part of carbon black (weight, the same applies below). When mixed in this amount,
From a dry state to a liquid state. After kneading well,
Apply an ultrasonic horn directly to the mixture. Carbon black may be added little by little while irradiating the alcohol with ultrasonic waves. Next, add PTF to this carbon black dispersion.
Add the required amount of E dispersion and stir to disperse.
If necessary, ultrasonic waves may be applied. Water may be contained in the alcohol used to such an extent that the carbon black can be dispersed. When the PTFE dispersion is used as a stock solution, it becomes a rice cake-like form, so it can be made into a liquid state by diluting it with water. You may add a surfactant as needed. When both solutions are mixed, carbon black and PTFE fine particles are mixed, but the alcohol of the carbon black dispersion acts on the PTFE dispersion,
Self-organization of the PTFE dispersion is expected to occur.
【０００８】これでカーボンブラックとＰＴＦＥ微粒子
との分散液が出来たので、このまま塗布液としてガス供
給層上にに塗布して反応層を形成する。また、スプレー
液としてそのままスプレーして反応層を形成することが
できる。さらに、スプレードライ法で反応層原料の粉末
にしても良い。アルコール含有量を制御し、ロール法で
シートに直接形成しても良い。乾燥して反応層原料粉末
を得、その粉末にソルベントナフサを加え、ロール法で
シートに形成しても良い。カーボンブラックを分散させ
るための分散媒としてエタノール、メタノール、イソプ
ロピルアルコール等のアルコール、アルコールではない
がアセトンも用いることが出来る。As a result, a dispersion liquid of carbon black and PTFE fine particles was prepared, and thus the coating liquid was applied as it was onto the gas supply layer to form a reaction layer. Further, the reaction layer can be formed by spraying as a spray liquid as it is. Furthermore, the powder of the reaction layer raw material may be formed by a spray drying method. It may be formed directly on the sheet by a roll method while controlling the alcohol content. The reaction layer raw material powder may be obtained by drying and solvent naphtha may be added to the powder to form a sheet by a roll method. As a dispersion medium for dispersing the carbon black, ethanol, methanol, alcohol such as isopropyl alcohol, or acetone instead of alcohol can be used.
【０００９】[0009]
【実施例】以下、本発明を実施例により説明するが、本
発明はこれらの実施例により何等限定されるものでな
い。また、全実施例を通じて部及びパーセントとも格別
の指示なき限り、すべて重量表示による。EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples. In addition, all parts and percentages are by weight unless otherwise specified.
【００１０】実施例１
イソプロピルアルコール１１０部に疎水性カーボンブラ
ック（デンカブラック、平均粒径３９０オングストロー
ム、電気化学工業社製）３部、親水性カーボンブラック
（ＡＢ−１２、平均粒径４００オングストローム、試作
品、電気化学工業社製）を７部加えて混合し、超音波ホ
ーンから直接混合物に超音波照射して分散した。更に、
ＰＴＦＥディスパージョン（Ｄ−１、平均粒径０．３ミ
クロン、ダイキン工業社製）４部を加え、素早く攪拌混
合し自己組織化させ、濾過することにより反応層原料と
した。Example 1 110 parts of isopropyl alcohol, 3 parts of hydrophobic carbon black (DENKA black, average particle size 390 Å, manufactured by Denki Kagaku Kogyo), hydrophilic carbon black (AB-12, average particle size 400 Å, test) (Manufactured by Denki Kagaku Kogyo Co., Ltd.) was added and mixed, and the mixture was directly irradiated with ultrasonic waves from an ultrasonic horn and dispersed. Furthermore,
4 parts of PTFE dispersion (D-1, average particle size: 0.3 micron, manufactured by Daikin Industries, Ltd.) was added, rapidly stirred and mixed to self-assemble, and filtered to obtain a reaction layer raw material.
【００１１】餅状の濾過物をそのまま疎水性カーボンブ
ラックとＰＴＦＥディスパージョンから構成したガス供
給層原料と重ね、次いでロール加工して反応層とガス供
給層から成るガス拡散電極シートを製造し、８０℃で３
時間乾燥し、添加したＰＴＦＥディスパージョンに含ま
れていた界面活性剤を、エタノール抽出装置で除去し
た。乾燥後、銀網と共に５０ｋｇ／ｃｍ2 で３７０℃、
６０秒間プレスして電極を得た。この電極の反応層に塩
化白金酸水溶液を塗布し、２００℃で３時間水素還元し
て、０．５ｍｇ／ｃｍ2 白金を担持したガス拡散電極を
得た。この電極の酸素還元性能を８０℃、３２％ＮａＯ
Ｈ中で測定したところ、３０Ａ／ｄｍ2 で０．８４８Ｖ
（ｖｓ．ＲＨＥ）の高い性能が得られた。The rice cake-like filtrate was directly laminated with the raw material for the gas supply layer composed of hydrophobic carbon black and PTFE dispersion, and then roll-processed to produce a gas diffusion electrode sheet comprising a reaction layer and a gas supply layer. 3 at ℃
After drying for an hour, the surfactant contained in the added PTFE dispersion was removed with an ethanol extractor. After drying, 370 ° C. at 50 kg / cm 2 with silver net,
The electrode was obtained by pressing for 60 seconds. A chloroplatinic acid aqueous solution was applied to the reaction layer of this electrode, and hydrogen reduction was performed at 200 ° C. for 3 hours to obtain a gas diffusion electrode carrying 0.5 mg / cm 2 platinum. The oxygen reduction performance of this electrode is 80 ° C, 32% NaO
Measured in H, 0.848V at 30A / dm 2 .
A high performance of (vs. RHE) was obtained.
【００１２】実施例２
エタノール１５０部に親水性カーボンブラック（ＡＢ−
１２、平均粒径４００オングストローム、試作品、電気
化学工業社製）７部、疎水性カーボンブラック（Ｎｏ．
６、平均粒径５００オングストローム、試作品、電気化
学工業社製）３部を添加し、超音波分散機で平均粒径１
ミクロン以下に分散した。この分散液に銀微粒子（田中
貴金属社製試作品、平均粒径０．１ミクロン以下）を
３．５部（銀重量）加え、攪拌混合した。更にＰＴＦＥ
ディスパージョン（Ｄ−１、ダイキン工業社製）４部を
加え、攪拌混合して反応層分散液を得た。水分が少ない
ので濾過、乾燥が容易であった。Example 2 150 parts of ethanol was mixed with hydrophilic carbon black (AB-
12, average particle size of 400 Å, prototype, manufactured by Denki Kagaku Kogyo Co., Ltd. 7 parts, hydrophobic carbon black (No.
(6, average particle size 500 angstrom, prototype, manufactured by Denki Kagaku Kogyo Co., Ltd.) 3 parts were added, and the average particle size was 1 with an ultrasonic disperser.
Dispersed to below micron. To this dispersion, 3.5 parts (silver weight) of silver particles (prototype manufactured by Tanaka Kikinzoku Co., Ltd., average particle size: 0.1 micron or less) was added and mixed with stirring. Further PTFE
4 parts of dispersion (D-1, manufactured by Daikin Industries, Ltd.) was added and mixed by stirring to obtain a reaction layer dispersion liquid. Since the water content was low, filtration and drying were easy.
【００１３】ロール法で疎水性カーボンブラックとＰＴ
ＦＥディスパージョンから構成したガス供給層シートを
製造し、この上に前記の反応層分散液を０．４ｍｍ厚に
塗布し、８０℃で３時間乾燥して反応層塗布ガス供給層
シートを得た。このシートから界面活性剤をエタノール
抽出装置で除去した。乾燥後、銀網と共に５０ｋｇ／ｃ
ｍ2 で３５０℃、６０秒間プレスして電極を得た。この
電極の酸素還元性能を８０℃、３２％ＮａＯＨ中で測定
したところ、３０Ａ／ｄｍ2 で０．８１８Ｖ（ｖｓ．Ｒ
ＨＥ）の高い性能の電極が得られた。Hydrophobic carbon black and PT by roll method
A gas supply layer sheet composed of FE dispersion was manufactured, and the above reaction layer dispersion liquid was applied thereon to a thickness of 0.4 mm and dried at 80 ° C. for 3 hours to obtain a reaction layer coating gas supply layer sheet. . The surfactant was removed from this sheet with an ethanol extractor. After drying, 50 kg / c with silver mesh
An electrode was obtained by pressing m 2 at 350 ° C. for 60 seconds. When the oxygen reduction performance of this electrode was measured at 80 ° C. in 32% NaOH, it was 0.818 V (vs.R) at 30 A / dm 2.
A high performance electrode of HE) was obtained.
【００１４】実施例３
グリセリン１５０部に銀微粒子（三井金属鉱業社製、Ａ
ｇ−３０１０、平均粒径０．１ミクロン）５０部を超音
波分散機で分散した。ＰＴＦＥディスパージョン（Ｄ−
１、ダイキン工業社製）１０部を加え、攪拌混合して反
応層分散液を得た。過剰のグリセリンを濾過することに
より除去して反応層塗布液とした。Example 3 150 parts of glycerin and silver fine particles (Mitsui Mining & Smelting Co., A
50 parts by weight (g-3010, average particle size 0.1 micron) were dispersed by an ultrasonic disperser. PTFE dispersion (D-
10 parts (manufactured by Daikin Industries, Ltd.) was added and mixed with stirring to obtain a reaction layer dispersion liquid. Excess glycerin was removed by filtration to obtain a reaction layer coating solution.
【００１５】ロール法で疎水性カーボンブラックとＰＴ
ＦＥディスパージョンから構成したガス供給層シートを
製造し、この上に前記の反応層塗布液を０．４ｍｍ厚に
塗布し、８０℃で３時間乾燥して反応層塗布ガス供給層
シートを得た。このシートから、ＰＴＦＥディスパージ
ョン由来の界面活性剤をエタノール抽出装置で除去し
た。乾燥後、銀網と共に５０ｋｇ／ｃｍ2 で３５０℃、
６０秒間プレスして電極を得た。これらの電極の酸素還
元性能を８０℃、３２％ＮａＯＨ中測定したところ、３
０Ａ／ｄｍ2 で０．８０３Ｖ（ｖｓ．ＲＨＥ）の高い性
能の電極が得られた。Hydrophobic carbon black and PT by roll method
A gas supply layer sheet composed of FE dispersion was manufactured, and the above reaction layer coating solution was applied thereon to a thickness of 0.4 mm and dried at 80 ° C. for 3 hours to obtain a reaction layer coating gas supply layer sheet. . From this sheet, the surfactant derived from the PTFE dispersion was removed with an ethanol extractor. After drying, 350 kg at 50 kg / cm 2 with silver mesh,
The electrode was obtained by pressing for 60 seconds. The oxygen reduction performance of these electrodes was measured at 80 ° C. in 32% NaOH, and was 3
A high performance electrode of 0.803 V (vs. RHE) at 0 A / dm 2 was obtained.
【００１６】[0016]
【発明の効果】本発明によれば、カーボンブラックの分
散媒をアルコールとしたので、カーボンブラックを液中
に分散させるのに多量の水と界面活性剤を必要としない
ので、使用する水と界面活性剤が少なく、コストが著し
く低減され、全体の処理量が少なくなるため、装置が小
形化される。さらに、カーボンブラック分散液をＰＴＦ
Ｅディスパージョンと混合するだけで、カーボンブラッ
クとＰＴＦＥディスパージョンとの分散液にアルコール
を加えて自己組織化した場合と同様な凝集とそれに伴う
自己組織化が生じるので、工程が簡単化され、良好な分
散構造が構成できた。しかもこの工程が簡単になったの
で、製造時間が短縮出来た。また、多量の界面活性剤を
使用していないので、自己組織化の後で界面活性剤を除
去する工程が簡単になり、多量の廃水を生じることがな
い。According to the present invention, since the dispersion medium of carbon black is alcohol, a large amount of water and a surfactant are not required to disperse the carbon black in the liquid. The device is miniaturized due to low activator, significant cost reduction and low overall throughput. In addition, the carbon black dispersion is added to PTF.
Just by mixing with E-dispersion, the same aggregation and accompanying self-assembly as in the case where alcohol is added to the dispersion liquid of carbon black and PTFE dispersion and the self-assembly accompanying it occur, so the process is simplified and good. It was possible to construct a complex distributed structure. Moreover, since this process is simplified, the manufacturing time can be shortened. Further, since a large amount of the surfactant is not used, the step of removing the surfactant after the self-assembly is simplified and a large amount of waste water is not generated.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｈ０１Ｍ 4/88 Ｈ０１Ｍ 4/88 Ｃ (72)発明者 古屋 長一 山梨県甲府市北口１−６−24−604 (56)参考文献 特開 昭57−104678（ＪＰ，Ａ) 特開 平11−80985（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C25B 1/00 - 15/08 C08J 3/205 CEW C08L 27/18 H01M 4/88 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI H01M 4/88 H01M 4/88 C (72) Inventor Choichi Furuya 1-6-24-604 Kitaguchi, Kofu City, Yamanashi Prefecture (56) References JP-A-57-104678 (JP, A) JP-A-11-80985 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) C25B 1/00-15/08 C08J 3 / 205 CEW C08L 27/18 H01M 4/88
Claims (2)
ス拡散電極材料を水溶性の有機溶媒に分散させ、その分
散液にポリテトラフルオロエチレンディスパージョンを
添加混合することを特徴とするガス拡散電極の反応層又
はガス供給層原料の製造方法。1. A reaction of a gas diffusion electrode, wherein a gas diffusion electrode material excluding polytetrafluoroethylene is dispersed in a water-soluble organic solvent, and polytetrafluoroethylene dispersion is added to and mixed with the dispersion. Method for producing bed or gas feed bed material.
ル、イソプロピルアルコール、エチレングリコール、グ
リセリン、アセトンよりなる群から選ばれる請求項１記
載の製造方法。2. The production method according to claim 1, wherein the organic solvent is selected from the group consisting of methanol, ethanol, isopropyl alcohol, ethylene glycol, glycerin, and acetone.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18608299A JP3434738B2 (en) | 1999-06-30 | 1999-06-30 | Method for producing gas diffusion electrode material |
| US09/609,240 US6630081B1 (en) | 1999-06-30 | 2000-06-30 | Process for producing gas diffusion electrode material |
| EP00113940A EP1065739A1 (en) | 1999-06-30 | 2000-06-30 | Process for producing gas diffusion electrode material |
| CNB001199773A CN1162929C (en) | 1999-06-30 | 2000-06-30 | Method for manufacturing reaction layer or gas feed layer material for gas diffusion electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18608299A JP3434738B2 (en) | 1999-06-30 | 1999-06-30 | Method for producing gas diffusion electrode material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001011679A JP2001011679A (en) | 2001-01-16 |
| JP3434738B2 true JP3434738B2 (en) | 2003-08-11 |
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ID=16182073
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|---|---|---|---|
| JP18608299A Expired - Lifetime JP3434738B2 (en) | 1999-06-30 | 1999-06-30 | Method for producing gas diffusion electrode material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685710B (en) * | 2008-09-26 | 2012-07-04 | 通用电气公司 | Methods for preparing composition and sheet containing composition as well as electrode containing sheet |
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- 1999-06-30 JP JP18608299A patent/JP3434738B2/en not_active Expired - Lifetime
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