JPH0719608B2 - Method for manufacturing material for gas diffusion electrode - Google Patents
Method for manufacturing material for gas diffusion electrodeInfo
- Publication number
- JPH0719608B2 JPH0719608B2 JP61129183A JP12918386A JPH0719608B2 JP H0719608 B2 JPH0719608 B2 JP H0719608B2 JP 61129183 A JP61129183 A JP 61129183A JP 12918386 A JP12918386 A JP 12918386A JP H0719608 B2 JPH0719608 B2 JP H0719608B2
- Authority
- JP
- Japan
- Prior art keywords
- gas diffusion
- diffusion electrode
- acetylene black
- present
- gas
- 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
- 238000009792 diffusion process Methods 0.000 title claims description 23
- 239000000463 material Substances 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 238000000034 method Methods 0.000 title description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 26
- 239000006230 acetylene black Substances 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 9
- 229920000642 polymer Polymers 0.000 claims description 9
- 239000005871 repellent Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 4
- 229910052740 iodine Inorganic materials 0.000 claims description 4
- 239000011630 iodine Substances 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 36
- 230000002209 hydrophobic effect Effects 0.000 description 7
- 239000004094 surface-active agent Substances 0.000 description 7
- 230000035699 permeability Effects 0.000 description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920006361 Polyflon Polymers 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 238000004108 freeze drying Methods 0.000 description 1
- 239000006232 furnace black Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- GPRLSGONYQIRFK-MNYXATJNSA-N triton Chemical compound [3H+] GPRLSGONYQIRFK-MNYXATJNSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/44—Carbon
- C09C1/48—Carbon black
- C09C1/54—Acetylene black; thermal black ; Preparation thereof
-
- 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
- H01M4/96—Carbon-based electrodes
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Inert Electrodes (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ガス拡散電極用材料の製造方法に関する。本
発明によって製造されたガス拡散電極用材料は、アルカ
リ型、硫酸型及びリン酸型燃料電地用電極、その他電解
工業における食塩電解用電極等、種々の電気化学用リア
クターの電極、二次電池用電極、電気化学用センサー、
更にはメツキ用陽極等に応用される。TECHNICAL FIELD The present invention relates to a method for producing a material for a gas diffusion electrode. Materials for gas diffusion electrodes produced by the present invention include various types of electrochemical reactor electrodes such as alkaline type, sulfuric acid type and phosphoric acid type fuel cell electrodes, salt electrolysis electrodes in the electrolysis industry, and secondary batteries. Electrode, electrochemical sensor,
Furthermore, it can be applied to anodes for plating.
〔従来の技術〕 ガス拡散電極は、炭素或いは金属の多孔性板を電極構成
材として用いてガスと電解液の、また電子・イオンと電
解液との電気化学反応に関与し、電子又はイオンを導く
役目を果たす。[Prior Art] A gas diffusion electrode uses a porous plate of carbon or metal as an electrode constituent material to participate in an electrochemical reaction between a gas and an electrolytic solution, or between electrons / ions and the electrolytic solution, and to prevent electrons or ions. Play a leading role.
ガス拡散電極は、反応に関与するイオンを含む水溶液、
電子を通すガス間においてイオン反応が行われる場が存
在する三相界面電極である。したがつて、ガス拡散電極
性能を向上させるためにはガスが透過できる疎水性領域
と電解質が存在できる親水性領域を制御して界面を増大
させることが重要である。The gas diffusion electrode is an aqueous solution containing ions involved in the reaction,
It is a three-phase interface electrode in which there is a field where an ionic reaction occurs between gases that pass electrons. Therefore, in order to improve the performance of the gas diffusion electrode, it is important to control the hydrophobic region where gas can permeate and the hydrophilic region where electrolyte can exist to increase the interface.
従来、ガス拡散電極としては、疎水部材料として、アセ
チレンブラツクとポリテトラフルオロエチレン（PTFE）
等の撥水性重合体粒子との混合物を、また、親水性材料
として、フアーネスブラツクや、親水化処理してなるア
セチレンブラツクを使用したものが知られている。Conventionally, for gas diffusion electrodes, acetylene black and polytetrafluoroethylene (PTFE) have been used as materials for the hydrophobic part.
It is known to use a mixture with water-repellent polymer particles such as, for example, and use, as a hydrophilic material, a furnace black or an acetylene black obtained by a hydrophilic treatment.
しかし、疎水部に用いるアセチレブラツクは一次粒子が
球形であるため撥水性重合体粒子との混合物とした場合
に空間が少なくなつてガスの透過能が十分でなくなる。
更には、導電性を向上させるためには電極を作製すると
きのプレス圧を高くする必要がある。しかし、プレス圧
を高するとガスの透過能が小さくなりガス供給が低下
し、その結果、限界電流密度が低下する。即ち高電流密
度の電極が作れない。この疎水部のアセチレンブラツク
のガス透過性及び導電性を向上させることによって更に
高性能のガス拡散電極が作製できる。また、アセチレン
ブラツクと撥水性重合体粒子の混合物を高分散させるに
は界面活性剤を多量に使用しなければならないという欠
点もあつた。However, since the primary particles of the acetylene black used for the hydrophobic portion are spherical, when the mixture is made with the water-repellent polymer particles, the space becomes small and the gas permeability becomes insufficient.
Furthermore, in order to improve the conductivity, it is necessary to increase the pressing pressure when manufacturing the electrode. However, when the pressing pressure is increased, the gas permeability is reduced and the gas supply is reduced, and as a result, the limiting current density is reduced. That is, an electrode with high current density cannot be made. By improving the gas permeability and conductivity of the acetylene black in the hydrophobic part, a gas diffusion electrode with higher performance can be manufactured. There is also a drawback that a large amount of a surfactant must be used in order to highly disperse the mixture of acetylene black and the water-repellent polymer particles.
本発明は、ガス拡散電極における上記問題点を解決しよ
うとする材料を提供するものである。The present invention provides a material for solving the above-mentioned problems in a gas diffusion electrode.
すなわち、本発明は、撥水性重合体粒子と比表面積15〜
45m2/g、沃素吸着量20〜60mg/g、嵩密度0.10〜0.30g/ml
を有するアセチレンブラックを含有してなる混合物を加
圧加熱焼成することを特徴とするガス拡散電極用材料の
製造方法である。That is, the present invention, the water-repellent polymer particles and the specific surface area 15 ~
45m 2 / g, iodine adsorption amount 20-60mg / g, bulk density 0.10-0.30g / ml
A method for producing a material for a gas diffusion electrode, which comprises heating a mixture containing acetylene black having the above-mentioned formula under pressure and heating.
以下、さらに詳しく本発明を説明する。Hereinafter, the present invention will be described in more detail.
撥水性重合体粒子としては、撥水性、耐酸化性、熱及び
化学薬剤に対する安定性にすぐれたものが要求される。
具体的には、ポリエチレン、シリコーン、PTFE等のフツ
素樹脂があげられるが、中でもPTFEが特に好ましい。撥
水性重合体粒子の大きさとしては、通常、0.2〜0.3μｍ
のものが使用される。The water-repellent polymer particles are required to have excellent water repellency, oxidation resistance, and stability against heat and chemical agents.
Specific examples thereof include fluorocarbon resins such as polyethylene, silicone, and PTFE, and PTFE is particularly preferable. The size of the water-repellent polymer particles is usually 0.2 to 0.3 μm.
Used.
本発明の主たる特徴は、疎水部のアセチレンブラツク
を、前記した特徴をを有するアセチレンブラツクを用い
たことであり、このようなものを使用する理由を説明す
れば次のとおりである。The main feature of the present invention is that an acetylene black having a hydrophobic portion is used as the acetylene black of the hydrophobic part, and the reason for using such an acetylene black is as follows.
すなわち、アセチレンブラツクの比表面積が15m2/g未満
であると細孔のシヤープな分布が得られず燃料電池等に
用いた場合、発電効率が低下する。又45m2/gを越えると
アセチレンブラツクの分散工程での濡れ性が悪くなり混
合分散に時間を要するため好ましくない。沃素吸着量が
20mg/g未満であると比表面積の効果と同様に発電効率が
低下するし、又60mg/gを越えると比表面積の効果と同様
に工程に無駄を来すことになる。嵩密度が0.1g/ml未満
であると電極の嵩密度を下げ電気比抵抗、熱抵抗及び機
械強度を低下させ、又0.3g/mlを越えると電極の嵩密度
を上げガス拡散係数が小となり、その結果として、限界
電流密度を低下させると同時に電解液保持能も下がり電
池性能を低下させる。That is, when the specific surface area of acetylene black is less than 15 m 2 / g, a sharp distribution of pores cannot be obtained, and when used in a fuel cell or the like, the power generation efficiency decreases. On the other hand, if it exceeds 45 m 2 / g, the wettability of the acetylene black in the dispersion step becomes poor, and it takes time to mix and disperse, which is not preferable. Iodine adsorption amount
If it is less than 20 mg / g, the power generation efficiency is reduced as well as the effect of the specific surface area, and if it exceeds 60 mg / g, the process is wasted as in the effect of the specific surface area. If the bulk density is less than 0.1 g / ml, the bulk density of the electrode will be lowered and the electrical resistivity, thermal resistance and mechanical strength will be reduced.If it exceeds 0.3 g / ml, the bulk density of the electrode will be raised and the gas diffusion coefficient will be small. As a result, the limiting current density is lowered, and at the same time, the electrolytic solution holding ability is lowered and the battery performance is lowered.
以上のような特性を有する本発明に係るアセチレンブラ
ツクは、アセチレンガスに水素を1.3〜２容量倍量程度
を添加し、分解温度を1,400〜1,700℃に保持することに
よつて製造することができる。The acetylene black according to the present invention having the above characteristics can be produced by adding about 1.3 to 2 times the volume of hydrogen to acetylene gas and maintaining the decomposition temperature at 1,400 to 1,700 ° C. .
次に、本発明のガス拡散電極用材料の製造する方法につ
いて説明すると、本発明に係るアセチレンブラツク100
重量部に対し撥水性重合体粒子10〜50重量部を混合す
る。混合に際しては、界面活性剤含有の水溶液を用い、
超音波・高剪断によるのが望ましい。次いで、該混練物
を凍結乾燥してから、280℃程度の温度で加熱して界面
活性剤を除き、それをホツトプレス成形するか、又は冷
間成形後加熱することにより本発明のガス拡散電極用材
料を製造することができる。成形にあたつては、集電と
補強の目的から、カーボンペーパー、グラフアイト板、
金属メツシユ等の導電材を配設することができる。Next, a method for producing the gas diffusion electrode material of the present invention will be described. The acetylene black 100 according to the present invention
10 to 50 parts by weight of water-repellent polymer particles are mixed with parts by weight. When mixing, use an aqueous solution containing a surfactant,
It is desirable to use ultrasonic waves and high shear. Then, the kneaded product is freeze-dried and then heated at a temperature of about 280 ° C. to remove the surfactant, and hot press-molded or cold-molded and then heated to produce a gas diffusion electrode of the present invention. The material can be manufactured. For molding, carbon paper, graphite plate,
A conductive material such as a metal mesh can be provided.
以上のようにして得られたガス拡散電極用材料を用いて
ガス拡散電極をつくるには、従来と同様にして、親水部
を構成するための親水性ブラツクと一体化すればよい。In order to form a gas diffusion electrode using the material for a gas diffusion electrode obtained as described above, it may be integrated with a hydrophilic black for forming a hydrophilic portion in the same manner as in the conventional case.
以下、実施例と比較例をあげてさらに具体的に本発明を
説明する。Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples.
本発明で使用するアセチレンブラツクの製造 内径0.4m.全長2.4mの垂直型分解炉を用いて、H2ガスを
アセチレン１容に対し1.8容を分解炉内へ送入すること
により分解温度を1500℃に調整し粉状アセチレンブラツ
クを製造した。得られた本発明に係るアセチレンブラツ
クと市販アセチレンブラツク（電気化学工業（株）製）
とを比較し表１に示した。Production of acetylene black used in the present invention Using a vertical cracking furnace having an inner diameter of 0.4 m and a total length of 2.4 m, 1.8 volumes of H 2 gas per 1 volume of acetylene were fed into the cracking furnace to obtain a decomposition temperature of 1500. The temperature was adjusted to ℃ to produce powdery acetylene black. Obtained acetylene black according to the present invention and commercially available acetylene black (manufactured by Denki Kagaku Kogyo Co., Ltd.)
And the results are shown in Table 1.
表１中の物性値は次の測定によつた。 The physical property values in Table 1 are based on the following measurements.
比表面積…『カンタソーブ』（カンタクローム社製比
表面積測定器）により測定。Specific surface area: Measured with "Cantasorb" (specific surface area measuring device manufactured by Cantachrome).
沃素吸着量…JISK−6221に準拠して測定。Iodine adsorption amount: Measured according to JIS K-6221.
嵩密度…JISK−1469に準拠して測定。Bulk density: Measured according to JIS K-1469.
ガス拡散電極用材料の製造と評価 （実施例） 撥水性重合体粒子としてポリテトラフルオロエチレン
（ダイキン工業（株）製 商品名『ポリフロンデイスパ
ージヨンＤ−１』30重量部と界面活性剤（トリトン）10
％水溶液1000重量部及び本発明に係るアセチレンブラツ
ク70重量部を超音波ホモジナイザー（周波数38kHz、回
転数1200rpm）にて高分散・混合した後凍結乾燥法（温
度−70℃→80℃）により乾燥し、この粉末を大気中280
℃、２時間加熱し界面活性剤を除いた。この様にして得
た原料粉末をプレス金型へ充填し、380℃、600kg/cm2×
3secでホツトプレスし面積100cm2、厚さ0.5mmのガス拡
散電極用材料からなる試料膜を得た。Production and Evaluation of Material for Gas Diffusion Electrode (Example) Polytetrafluoroethylene as water-repellent polymer particles (manufactured by Daikin Industries, Ltd., trade name "Polyflon Disparyon D-1", 30 parts by weight and surfactant ( Triton) 10
% Aqueous solution 1000 parts by weight and acetylene black 70 parts by weight according to the present invention are highly dispersed and mixed by an ultrasonic homogenizer (frequency 38 kHz, rotation speed 1200 rpm), and then dried by freeze-drying method (temperature -70 ° C → 80 ° C). , This powder in the atmosphere 280
The surfactant was removed by heating at ℃ for 2 hours. The raw material powder thus obtained was filled in a press die, and the temperature was 380 ° C. and 600 kg / cm 2 ×
It was hot-pressed for 3 seconds to obtain a sample film made of a gas diffusion electrode material having an area of 100 cm 2 and a thickness of 0.5 mm.
（比較例） 本発明に係るアセチレンブラツクのかわりに市販アセチ
レンブラツクとし界面活性剤量を２倍にかえたこと以外
は実施例と同一の方法でガス拡散電極から成る試料膜を
作成した。(Comparative Example) A sample film composed of a gas diffusion electrode was prepared in the same manner as in the example except that a commercially available acetylene black was used instead of the acetylene black according to the present invention and the amount of the surfactant was doubled.
これらの試料膜特性を表２に示す。Table 2 shows the characteristics of these sample films.
表２から明らかなように、本発明は、分散性が良好であ
り用いる界面活性剤も1/2以下とすることが可能であ
る。As is clear from Table 2, in the present invention, the dispersibility is good and the surfactant used can be reduced to 1/2 or less.
表２中の物性値は次の測定法によつた。 The physical property values in Table 2 were measured by the following methods.
電気比抵抗…SRIS−2301に従つて測定。Electrical resistivity… Measured according to SRIS-2301.
ガス透過度…試料膜の下面よりO2ガスを0.5atmで導入
しアクリル板で仕切られた試料膜を透過したガス流量を
石鹸膜流量計で測定する。このときの流量（ml/sec）を
試料膜の断面積及び厚みで補正しガス透過度とする。Gas permeability: O 2 gas was introduced at 0.5 atm from the lower surface of the sample film, and the gas flow rate through the sample film partitioned by the acrylic plate was measured with a soap film flow meter. The flow rate (ml / sec) at this time is corrected by the cross-sectional area and thickness of the sample film to obtain the gas permeability.
本発明によって製造されたガス拡散電極用材料は、従来
のものよりも優れた電気比抵抗とガス透過能を有するも
のである。更に、本発明に係るアセチレンブラツクは易
分散性であるためガス拡散電極を容易に作ることができ
る。このように、本発明によって製造されたガス拡散電
極用材料は優れた性質を持つためガス拡散電極の反応層
中の疎水部及びガス供給層として優れた材料となる。こ
の特性を利用し電気化学リアクター、電気化学用センサ
ー、メツキ用陽極及び燃料電池用電極等として応用でき
る。The material for gas diffusion electrode produced by the present invention has excellent electrical resistivity and gas permeability as compared with the conventional materials. Furthermore, since the acetylene black according to the present invention is easily dispersible, a gas diffusion electrode can be easily manufactured. As described above, the material for a gas diffusion electrode manufactured according to the present invention has excellent properties, and thus is an excellent material for the hydrophobic portion and the gas supply layer in the reaction layer of the gas diffusion electrode. Utilizing this property, it can be applied as an electrochemical reactor, an electrochemical sensor, an anode for plating, an electrode for fuel cells, and the like.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０１Ｍ 4/88 Ｃ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical indication H01M 4/88 C
Claims (1)
沃素吸着量20〜60mg/g、嵩密度0.10〜0.30g/mlを有する
アセチレンブラックを含有してなる混合物を加圧加熱焼
成することを特徴とするガス拡散電極用材料の製造方
法。1. A water-repellent polymer particle and a specific surface area of 15 to 45 m 2 / g,
A method for producing a material for a gas diffusion electrode, which comprises heating a mixture containing acetylene black having an iodine adsorption amount of 20 to 60 mg / g and a bulk density of 0.10 to 0.30 g / ml under pressure and heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61129183A JPH0719608B2 (en) | 1986-06-05 | 1986-06-05 | Method for manufacturing material for gas diffusion electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61129183A JPH0719608B2 (en) | 1986-06-05 | 1986-06-05 | Method for manufacturing material for gas diffusion electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62287570A JPS62287570A (en) | 1987-12-14 |
| JPH0719608B2 true JPH0719608B2 (en) | 1995-03-06 |
Family
ID=15003194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61129183A Expired - Lifetime JPH0719608B2 (en) | 1986-06-05 | 1986-06-05 | Method for manufacturing material for gas diffusion electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0719608B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3171642B2 (en) * | 1992-02-28 | 2001-05-28 | 田中貴金属工業株式会社 | Gas diffusion electrode |
| JPH05287571A (en) * | 1992-04-10 | 1993-11-02 | Tanaka Kikinzoku Kogyo Kk | Gas collecting electrode and its production |
| JP3099846B2 (en) * | 1992-05-07 | 2000-10-16 | 田中貴金属工業株式会社 | Gas diffusion electrode and method of manufacturing the same |
| DE10130441B4 (en) * | 2001-06-23 | 2005-01-05 | Uhde Gmbh | Process for producing gas diffusion electrodes |
| JP4133654B2 (en) * | 2003-07-01 | 2008-08-13 | 本田技研工業株式会社 | Polymer electrolyte fuel cell |
-
1986
- 1986-06-05 JP JP61129183A patent/JPH0719608B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62287570A (en) | 1987-12-14 |
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