JPS5966063A - Electrode base plate for fuel cell - Google Patents
Electrode base plate for fuel cellInfo
- Publication number
- JPS5966063A JPS5966063A JP57174960A JP17496082A JPS5966063A JP S5966063 A JPS5966063 A JP S5966063A JP 57174960 A JP57174960 A JP 57174960A JP 17496082 A JP17496082 A JP 17496082A JP S5966063 A JPS5966063 A JP S5966063A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- porous layer
- electrode substrate
- base plate
- dense layer
- 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
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
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、燃料電池用電極基板に保υ、更に詳しくは、
多孔性層とチ密層の二層から成り、複数本の中空孔道を
多孔性層のほぼ中心部に有する炭素質燃料電池用電極基
板に停る。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an electrode substrate for a fuel cell.
The electrode substrate for a carbonaceous fuel cell is composed of two layers: a porous layer and a dense layer, and has a plurality of hollow pores approximately in the center of the porous layer.
従来、黒鉛製薄板（不透過性のもの）をリプ細工して得
られるパイポーラセバレータヲ用いるパイボー２セパレ
ータ型燃料電池が公知である。Conventionally, a bipolar separator type fuel cell using a bipolar separator obtained by lip-processing a graphite thin plate (impermeable) is known.
これに対し、一方の面にリプを設け、他方の面は平坦な
電極面となった構造を有し、リプ付き面から反応ガスが
平坦な電極面に拡散してくるモノポーラ型電極基板が開
発されて来ている。In response, a monopolar electrode substrate was developed that has a structure in which a lip is provided on one surface and a flat electrode surface on the other surface, and the reactive gas diffuses from the lipped surface to the flat electrode surface. It's been happening.
従来のモノポーラ型セルは、添付の第１図に示すように
、一方の面にリプ５を設は他方の面は平坦な構造を有す
る電極基板１、触媒層２、電解質を含浸させたマトリッ
クス３及びセパレーターシート４から成っておシ、電極
基板１のリプ付き面から反応ガス（酸素又は水嵩）が平
坦な電極面に拡散してくるものである。As shown in the attached Figure 1, a conventional monopolar cell includes an electrode substrate 1 having a lip 5 on one side and a flat structure on the other side, a catalyst layer 2, and a matrix 3 impregnated with an electrolyte. and a separator sheet 4, and a reactive gas (oxygen or water) diffuses from the lipped surface of the electrode substrate 1 onto the flat electrode surface.
従来、モノポーラ型燃料電池用電極基板の製造方法とし
て、短炭素繊維をベースにしてプレス成形する方法（特
願昭５６−４８７００）、炭素繊細を分散させた抄造法
（特公昭５３−１８６０３）、炭素繊維のウェブに熱分
解炭素を化学的蒸着する方法（米国特許第３，８２９．
３２７号明細１）が提案されている。これら従来の製造
方法によって得られる電、極基板ケよ、いずれも全体的
に均一な構造の一つの層からなっている。Conventionally, methods for manufacturing electrode substrates for monopolar fuel cells include a method of press molding based on short carbon fibers (Japanese Patent Application No. 48700/1986), a paper-making method using dispersed carbon fibers (Japanese Patent Publication No. 18603/1983), A method of chemical vapor deposition of pyrolytic carbon onto a web of carbon fibers (U.S. Pat. No. 3,829).
No. 327 Specification 1) has been proposed. The electrode and electrode substrates obtained by these conventional manufacturing methods each consist of a single layer with an overall uniform structure.
このような均質単層の電極基板は、その嵩密度が大きい
場合、ガス拡散係数が小さいため限ｉ？電流密度が小と
なるとともに電解液の保持ｌが充分で力いだめ性能の低
下する時期が早くなる、すなわち寿命が短いという欠点
を有する。他方、その嵩密度が小さい場合には、電気抵
抗、熱抵抗が大きく、曲げ強度などの機械的強度が低い
という欠点を有し、ている。When such a homogeneous single-layer electrode substrate has a large bulk density, the gas diffusion coefficient is small, so there is a limit to i? As the current density becomes smaller, the retention of the electrolyte is sufficient and the power storage performance deteriorates earlier, that is, the life is shortened. On the other hand, when the bulk density is low, it has the drawbacks of high electrical resistance, high thermal resistance, and low mechanical strength such as bending strength.
また、リプ構造を有する電極基板の場合は、第１図に示
すように、片面が平面でないため断面係数が小さくなり
、例えばリプ５の根本のシャープエツジ部６に応力の集
中が起とシ、子のため全体としての強度面でいま一つ細
軸の置けない面があった。従って、成型板としての強度
を保つためには平板部の肉厚を厚くするしかなく、その
ためリプ側から電極面側まで電極基板の全厚さを通って
ガス（酸素又は水素）が拡散する際の拡散抵抗が大きく
なるという欠点があった３、その上、リプ頂上平面部分
の平面性を完全なものにすることが困難であシ、セパレ
ーターとの電気的及び熱的接触抵抗が無視し得ない程大
きくなる。一般に、これらの接触抵抗は基板内の伝達抵
抗の数倍に・モ鉾するといわれておシ、従来のモノポー
ラ型電極基板は接触抵抗が大きく、従ってセル間温度分
布の不均一性、発電効率の低下という決定的欠点を有す
る。Furthermore, in the case of an electrode substrate having a lip structure, as shown in FIG. 1, since one side is not flat, the section modulus becomes small, and stress concentration occurs, for example, at the sharp edge portion 6 at the root of the lip 5. Because of the size of the product, there was an issue in terms of overall strength that made it difficult to install a thin shaft. Therefore, in order to maintain the strength of the molded plate, there is no choice but to increase the wall thickness of the flat plate part, so that when gas (oxygen or hydrogen) diffuses through the entire thickness of the electrode substrate from the lip side to the electrode surface side. This has the disadvantage of increasing the diffusion resistance of the lip3, and in addition, it is difficult to perfect the flatness of the top surface of the lip, and the electrical and thermal contact resistance with the separator is negligible. It gets so big that it doesn't. In general, it is said that these contact resistances are several times higher than the transmission resistance within the substrate.Conventional monopolar electrode substrates have large contact resistances, resulting in uneven temperature distribution between cells and reduced power generation efficiency. It has the decisive drawback of lowering the value.
本発明は、上述の如き欠点を解消する燃料電池用電極基
板を提供することを目的とする。即ち、本発明は、多孔
性層とチ密層から成り、相当直径が０．５〜３ｍ＋の断
面を有する連続した中空孔道群を多孔性層の厚さのｔｌ
は中心部に一端面から相対する端面に向かって平行に有
する二層構造の炭素質燃料電池用電極基板を提供する。An object of the present invention is to provide an electrode substrate for a fuel cell that eliminates the above-mentioned drawbacks. That is, the present invention consists of a porous layer and a dense layer, and a continuous hollow hole group having a cross section with an equivalent diameter of 0.5 to 3 m
provides an electrode substrate for a carbonaceous fuel cell having a two-layer structure in which the central portion is parallel to one end surface toward the opposite end surface.
以下、添付図面を参照して本発明を詳述する。Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
なお図面中間一部分に対しては第１図の参照番号と同一
のものを使用した。Note that the same reference numbers as those in FIG. 1 are used for the middle part of the drawing.
本発明の市、極基板を使用す石燃料電池のセル構造を第
２図に示す。本発明の電極基板１は、多孔性層８及びチ
密層９から成る二層構造を有する。The cell structure of a stone fuel cell using the electrode substrate of the present invention is shown in FIG. The electrode substrate 1 of the present invention has a two-layer structure consisting of a porous layer 8 and a dense layer 9.
更に、本発明の電極基板１は、多孔性層８のほぼ中心部
に中空孔道群７を有している。Further, the electrode substrate 1 of the present invention has a hollow hole group 7 approximately at the center of the porous layer 8.
この中空孔道７の断面は第２図に示した如く円形でもよ
いが他の任意の形をとυ得る。中空孔道７の断面を円形
と考えた場合の直径に相当する寸法（相当直径と称する
）は０．５〜３ｍであυ、この相当直径が０．５ ｔｒ
ｍよシ小さいとガス流動の抵抗が大き過ぎ、Ｂｆｌよシ
大きいと基板厚さが大きくなシ過ぎ積層したセルの容積
効率が減少する０又、この中空孔道群７は互いに平行で
あシ旦つ基板１の電極面に平行である。更に、中空孔道
７Ｑ：１２、基板の一端面から相対する端面に向かって
連続している。The cross section of this hollow hole channel 7 may be circular as shown in FIG. 2, but it may have any other shape. When the cross section of the hollow hole channel 7 is considered circular, the dimension corresponding to the diameter (referred to as the equivalent diameter) is 0.5 to 3 m, and this equivalent diameter is 0.5 tr.
If m is smaller, the gas flow resistance is too large, and if Bfl is larger, the substrate thickness is too large and the volumetric efficiency of the stacked cells is reduced.In addition, the hollow holes 7 should be parallel to each other. 1 is parallel to the electrode surface of the substrate 1. Furthermore, the hollow hole path 7Q:12 is continuous from one end surface of the substrate toward the opposite end surface.
上記多孔性層８は、均質な多孔性炭素質制料から構成さ
れておシ、その平均嵩密度は０．３〜１．０ｇ／Ｃ１ｎ
”、好ましくは０４〜０．８ ｇ／ｌｙｎ”であシ旦つ
ガス透過度は２０ｉ−ｈｒ−ｗＩＩＩＡｑ８以上そある
ことが好ましい。上記範囲の平均嵩密度及びガス透過度
を有する多孔性層８は、好ましい機械的強度例えば曲げ
強就を有し、更に好貰しいガス拡散抵抗を有する。なお
、多孔第１層８の＃、ｉｌｌ孔は開削孔でヲコリ、旧っ
子の細孔の６０％以上が１０〜１００μの範囲内の径に
：治することが好ましい。The porous layer 8 is made of a homogeneous porous carbonaceous material, and has an average bulk density of 0.3 to 1.0 g/C1n.
The gas permeability is preferably 20 i-hr-wIIIAq8 or more. A porous layer 8 having an average bulk density and gas permeability in the above ranges has favorable mechanical strength, such as flexural strength, and also has favorable gas diffusion resistance. In addition, it is preferable that 60% or more of the # and ill pores in the first porous layer 8 be open-cut holes, and that 60% or more of the old pores have a diameter within the range of 10 to 100 μm.
本発明電極基板１のチ密層９は、１、Ｏｇ／ｃｍ”以」
二の平均１７．密度と０．２ ｍｅｌｏｎ ・ｈｒ ・
ａｍ Ａ ｑ、 以下のガス透過度を廟するのが女Ｉま
しい。平均嵩密度が１、０ ｇ／を−よシ小さいと所望
のチ密性が得られない。仁のチ密層９はガス透過度が小
さいためセパレーターシート（第１図の４）として機能
１〜イ↓）るが、ガス透過度が０．２ ｍｅ／−・ｈｒ
−ｍｍＡ ｑ、より太きいとセパレーターシートとして
の役割が果たせなくなる。又、とのチ密層９は電極基鈑
１全体の厚さの１／２以下を占めることが好ましい。The dense layer 9 of the electrode substrate 1 of the present invention has a thickness of 1.0 g/cm or less.
The average of the two is 17. Density and 0.2 melon・hr・
am A q, it is feminine to have the following gas permeability. If the average bulk density is less than 1.0 g/, the desired density cannot be obtained. Since the gas permeability of the dense layer 9 is low, it functions as a separator sheet (4 in Figure 1), but the gas permeability is 0.2 me/-・hr.
-mmAq, if it is thicker, it will not be able to fulfill its role as a separator sheet. Further, it is preferable that the dense layer 9 occupies 1/2 or less of the thickness of the entire electrode substrate 1.
本発明の中空孔道群奢有する二層構造の電極基板は以下
のようにして製造される。The electrode substrate of the present invention having a two-layer structure containing a group of hollow holes is manufactured as follows.
多孔性層側材料としては、充填利として短炭素繊維又は
粒状活性炭等を例えばｌＯ〜５０重′ｆｉｔチ、結合材
としてフェノール樹脂、エポキシ樹脂、石油系及び／又
は石炭系ピッチ等を例えは１０〜４０重量％、及び細孔
調節材としてポリビニルアルコール、ポリエチレン、ポ
リプロピレン、ポリ増化ビニル、砂糖等を例えば２０〜
５０重規、チ、混合して得た混合物を使用する。As the material for the porous layer, short carbon fibers or granular activated carbon can be used as a filler, for example, 10 to 50 weight, and phenol resin, epoxy resin, petroleum-based and/or coal-based pitch, etc. can be used as a binder, for example, 10 to 10 weight. ~40% by weight, and polyvinyl alcohol, polyethylene, polypropylene, polyenhanced vinyl, sugar, etc. as a pore control material, e.g. 20~40% by weight.
Use the mixture obtained by mixing on a 50-meter scale.
中空孔道材としては、クロス状織物、スダレ格子状のポ
リエチレン、ポリプロピレン、ポリエチレン、ポリビニ
ルアルコール、ポリ塩化ビニル等の高分子全使用する。As the hollow hole path material, all polymers such as cloth-like fabrics, polyethylene in the form of a lattice, polypropylene, polyethylene, polyvinyl alcohol, and polyvinyl chloride are used.
チ密層用材料としては、黒鉛板又は圧縮黒鉛紙等を使用
する場合と、短炭素繊維、炭素前駆体微粉末（特公昭５
５−３１１１６号参照）、フェノール樹脂等の結合材及
び活性炭微粒から成る粉末混合物から一体成型する場合
とがある。As the material for the dense layer, graphite plates or compressed graphite paper may be used, short carbon fibers, carbon precursor fine powder (Special Publications Publication No. 5
5-31116), and may be integrally molded from a powder mixture consisting of a binder such as a phenol resin and fine particles of activated carbon.
上記多孔性層相混合物をプレス成形用金ノ１．９内−＼
供給し、その上に中空孔道材を入れ、更に」二配多孔性
層用混合物を導入し、最後にチ密層用相料を供給する。Place the above porous layered phase mixture in the press molding metal 1.9-＼
Then, the hollow pore material is placed thereon, the mixture for the double porous layer is introduced, and finally the phase material for the dense layer is fed.
金型加熱温度例えば７０〜２００℃、成形圧例えば５〜
１００ｋｇ／ｃ１ｎ″で１〜６０分間の適当な温度、圧
力、時間でプレス成形し、一度ＳＯＯ℃で約１時間予備
焼成を行ない、該焼成物のチ密層側にのみ液状フェノー
ル樹脂（溶媒はアルコール等フェノール樹脂を溶解し得
るもの）を浸し、約８００℃にて再び焼成する。この、
いわゆる含浸工程を１仲とするチ密性が得られるまで数
回繰シ返す。最後に、得られた予備焼成成形物を少なく
とも２時間以上加圧せずに後硬化させる。Mold heating temperature e.g. 70~200℃, molding pressure e.g. 5~
Press molding is carried out at an appropriate temperature, pressure, and time for 1 to 60 minutes at 100 kg/c1n'', and pre-baked once at SOO℃ for about 1 hour. It is soaked in alcohol (something that can dissolve the phenolic resin) and fired again at about 800°C.
The so-called impregnation step is repeated several times until a uniformly dense layer is obtained. Finally, the obtained pre-fired molded product is post-cured without applying pressure for at least 2 hours.
その後、１０００〜３０００℃で焼成する。After that, it is fired at 1000 to 3000°C.
本発明の電極基板の一１中空孔道の両面が平面であるた
め断面係数が大きく、曲げ強度が増大され、更に、ガス
（０２又はＨｌｌ）を通す中を孔道が電極基板の多孔性
層のほぼ中心部に存在するため、曲は強度は大きく〜片
化が可能であり、拡散層が薄くなυ、ガス拡散抵抗が小
とな転電流密度が犬となるという多大の利点を有する。Since both sides of the electrode substrate (1) of the electrode substrate of the present invention are flat, the section modulus is large and the bending strength is increased. Because it exists in the center, the curve has great strength and can be broken into pieces, has a thin diffusion layer υ, has small gas diffusion resistance, and has many advantages such as low rolling current density.
又、チ密層が小さいガス透過度を有するので、七ノくレ
ータ−シートが不要とな夛、価格低減が望めると同時に
、他方式の場合生ずるセパレーターシートと電極基板と
の接触抵抗が皆無となυ、全体としての電気抵抗の激減
に多大の効果が発揮さ第１る０このように本発明の電極
基板は理想的基板といえる。因みに、炭素繊維抄造法に
よる炭素繊維ペーノく一層に比較しては、曲げ強度が大
になると同時にリブ伺黒鉛板が不要となシ、価格の低下
、更に箪１気抵抗の低下が期待できる。In addition, since the dense layer has a low gas permeability, there is no need for a separator sheet, which can reduce the cost, and at the same time, there is no contact resistance between the separator sheet and the electrode substrate that occurs with other methods. Therefore, the electrode substrate of the present invention can be said to be an ideal substrate. Incidentally, compared to the carbon fiber paper made by the carbon fiber papermaking method, it is expected that the bending strength will be increased, there will be no need for a ribbed graphite plate, and the price will be lowered, as well as the lower air resistance.
本発明の電極基板によって得られる効果を一層明確にす
るため、本発明の電極基板と従来のリプ付モノポーラ型
電極基板（第１図参照）の諸物性値を比較対照して第１
表に示す。尚、第１表に示したものは１例であシ、比較
のため同一形状のものを用い、同一条件で測定したもの
である。In order to further clarify the effects obtained by the electrode substrate of the present invention, the physical properties of the electrode substrate of the present invention and a conventional monopolar electrode substrate with lips (see Fig. 1) are compared and contrasted.
Shown in the table. It should be noted that what is shown in Table 1 is just one example, and for comparison purposes, samples of the same shape were used and were measured under the same conditions.
第１表
注１）セパレーターシー）（０，５ｍｍ）十基板十電解
液層（０，５ｍ）子基板のｎみ、俳し本発明に於いては
セパレーク−シートがない。Table 1 Note 1) Separator sheet (0.5 mm) 10 substrates 10 electrolyte layers (0.5 m) There is no separator sheet in the present invention.
２）ＩｃｊＩ＋” あたりの抵抗値で示す、。2) Indicated by the resistance value around IcjI+''.
３）接圧１胤４−での抵抗値
４）セパレーターシート＋基板→一基板＋接触抵抗（セ
パレーターシートの抵抗イ１６はｌｒｎΩである□イロ
Ｌ５、本発明に於いてはセパ１／−ターシートがない。3) Resistance value at contact pressure 1 4- 4) Separator sheet + substrate → 1 substrate + contact resistance (resistance 16 of separator sheet is lrnΩ □Iro L5, in the present invention, separator 1/-ter sheet There is no.
）
５） ２００ ｍＡ／ｃｍ” での値発明は以下の実
施例に限定されるものではない。) 5) Value at 200 mA/cm'' The invention is not limited to the following examples.
見違上巳
短炎素繊維（県別化学製、ＭＩ Ｏ４Ｓ ）４０ｖｔ係
、細孔１Ｍ節材としてポリビニルアルコール粒子（日本
合成化学製） ３０ ｗｔ９６、及び結合相とじ１ンエ
ノール樹脂（旭有機拐に、に、製） ’３０ ｗｔチか
らなる混合物を、プレス成形用金型に供給し、その後中
空孔道を形成するために中空孔過料（スダレ格子状ポリ
ビニルアルコール成形物）を供給する。Misumi Kamishitan flame fiber (MI O4S, made by Kenbetsu Kagaku) 40vt, polyvinyl alcohol particles (made by Nippon Gosei Kagaku) 30wt96 as a pore 1M knot material, and binder phase binding 1-tonenol resin (Asahi Organic Co., Ltd., A mixture consisting of '30 wt.
更に前記混合物を中空孔道形成相上に９．紹し、その後
、短炎素繊維（県別化＄、Ｍ１０４Ｓ）２０ｗｔ六活性
炭微粒（県別化学製） ２０ ｗｔチ、炭素前駆体微粉
末（県別化学製、Ｍ、 ｌ（、） ４０ ｗｔ係、フ
ェノール樹脂（地有機栃製） ２０ ｗｔ％からなる混
合物を供給する。9. Further, apply the above mixture onto the hollow pore forming phase. After that, short flame fiber (Kenbetsu Kagaku $, M104S) 20wt 6 activated carbon fine particles (Kenbetsu Kagaku Co., Ltd.) 20wt, carbon precursor fine powder (Kenbetsu Kagaku Co., Ltd., M, l(,) 40wt A mixture consisting of 20 wt% of phenolic resin (manufactured by Jigo Tochi) was supplied.
その後、１４０℃、５０ Ｗｔｌｎ” ％ 約３０分間
の条件にてプレス成形し１、更に８００℃で約１時間焼
成する０更に、上記ＳＯＯ℃焼成基板のチ密層８００℃
で焼成した０この含浸、焼成を・３回繰り返［７た後、
上記８００℃焼成基板を２０００℃で１時間焼成した。Thereafter, it is press-molded at 140°C and 50 Wtln"% for about 30 minutes, and then baked at 800°C for about 1 hour. Furthermore, the dense layer of the SOO°C fired substrate is heated to 800°C.
This impregnation and firing process was repeated three times [7]
The above 800°C fired substrate was fired at 2000°C for 1 hour.
本実施例で得られた電極基板は、第２図に示す如く二層
構造になっており、シ密層のガス透過度は極めて小さく
、燃料電池の七）くレータ−を兼ねるととができること
が判った。該電極基板の物性を第２表に記ａｔ’ ルｏ
ｌ”！；＋、・ｒ； ＪシＬｙ＞ｒ！’１ｆｔ＋ ＋
Ｊ ｎ ＋’ｔ”内−ｙ３ で＝ ｈν、＋ ｖ Ｊ
（ｉ ｔコ釣０．＞ ｒｎｔｎ １°゛ｈ７．’：。The electrode substrate obtained in this example has a two-layer structure as shown in Fig. 2, and the gas permeability of the dense layer is extremely low, and it can also be used as a fuel cell membrane. It turns out. The physical properties of the electrode substrate are listed in Table 2.
l"!;+,・r;JshiLy>r!'1ft+ +
J n + 't'' in -y3 = hν, + v J
(it fishing 0.>rntn 1°゛h7.':.
第２表 。Table 2.
実施例２
実施例１のチ密層用拐料の代わυに黙鉛板を用いる以外
は実施例１と同様にして、二層構造を有σ）ｄイ？Ｊ２
４５４メＳ＋剥・＃仏＋２１１＋（ｊ）ＩＦ−）’；（
＠ｌ＝ｈ ７／’と。Example 2 A two-layer structure was obtained in the same manner as in Example 1, except that a lead plate was used instead of the thin film material for the dense layer in Example 1. J2
454 me S + Peeling #Buddha + 211 + (j) IF-)';(
@l=h 7/'.
第３表Table 3
第１図は、従来のモノポーラ型燃料電池セル構造を示す
斜視図、第２図は、本発明の二層構造の電極基板のセル
構造を示す斜視図である。
ｌ・・・電極基板、２・・・触媒層、３・・・マトリッ
クス、４・・・セパレーターシート、５・・・リプ、７
・・・中空孔道、８・・・多孔性層、９・・・チ密層。
代理人弁理士宮 ＋１１１ 広 嶽代理人ｘｎ
士川 １−１ 義 雄
代理人弁理士今 村 元
手続ン１ｊｊ丁Ｆ月
昭和５５７年１１月′１［ｌ
特ｎ庁長官 若 杉 和 夫 殿
１、事（’ｌの表示 昭和５７年特許願第１７４９
６０号２、発明の名称 燃料電池用電極基板３、Ｎ
ｌｉ正をりる者
事イ′１どの関係 特許出願人
名 称 （１１０）県別化学工業株式会？Ｊ４、代
理 人 東京都新宿区新宿１丁目１番＋４ＦＵｉ
ＩＩＩＵＪビル（１） 本願明細書中、特許請求の範
囲を別紙のとおシ補正する。
（２）本願明細書中１ｓ８頁第１１行目「圧縮黒鉛紙」
とあるを［圧縮黒鉛紙（グラファイトシート月と補正す
る。
（３）同第１２頁第８行目「混合物」とあるを、「混合
物（多孔性要用材料）」と補正する。
（４）同第１２頁下から第３行目「混合物」とあるを、
「混合物（チ密層用材料）」と補正する。
（５）同第１４頁「第３表」の後、「４、図面の簡単な
説明」の前に別紙を挿入する２
実施例 ３
実施例１のチ密層用材料の代わシに厚さ０．３１１ＩＩ
のグラファイトシー）（ＵＣＣ製グラフオイル）を用い
る以外は実施例１と同様にして、二層構造を有する本発
明の電極基板を製造した。
仁の電極基板の物性を第４表に示す。尚、中空孔道の断
面はほぼ円形であり、その直径は約０．８１１ｍであっ
た。
２、特許請求の範囲
（１）多孔性層とチ密層から成シ、相当直径が０．５〜
３ｍの断面を有する連続した中空孔道を多孔性層の厚さ
のほぼ中心部に一端面から相対する端面に向かって平行
に複数本布することを特徴とする二層構造の炭素質燃料
電池用電極基板。
（２） 多孔性層が０．３〜１．０ ｇ／ｃｍ” の
平均嵩密度及び２Ｑ ｍｌ／ｃａ＠ｈｒ−＊ＬＡｑ、以
上のガス透過度を有しでおり、チ密層が１．０ｇ／ｃｍ
’以上の平均嵩密度及び０．２ｍｌ ７ｃｍｍ ｈｒｓ
＋ｍ＋ｘＡｑ、以下のガス透過度を有していることを特
徴とする特許請求の範囲第１項に記載の電極基板。
（３）多孔性層の細孔は開削孔であシ、且つその６０−
以上が１０〜１００ ｔｔの範囲内の径を有することを
特徴とする特許請求の範囲第１項又は第２項に記載の電
極基板。
（４）チ密層が基板全厚さの１／２以下を占めることを
特徴とする特許請求の範囲第１項乃至第３項のいずれか
に記載の電極基板。
（５）チ密層がグラファイトシートであることを特徴と
する特許請求の範囲第１項乃至第４項のいずれかに記載
の電極基板。FIG. 1 is a perspective view showing a conventional monopolar fuel cell structure, and FIG. 2 is a perspective view showing a cell structure of a two-layer electrode substrate of the present invention. l... Electrode substrate, 2... Catalyst layer, 3... Matrix, 4... Separator sheet, 5... Lip, 7
. . . hollow pores, 8 . . . porous layer, 9 . . . dense layer. Agent Patent Attorney Miya +111 Hirotake Agent xn
Shikawa 1-1 Yoshio Yoshio Patent Attorney Imamura Moto Proceedings November 1982 [l Patent Office Commissioner Wakasugi Kazuo 1, Matter ('l Indication 1988 Patent Request No. 1749
60 No. 2, Title of invention Fuel cell electrode substrate 3, N
What is the relationship between patent applicant name (110) Prefectural Chemical Industry Corporation? J4, Agent 1-1 Shinjuku, Shinjuku-ku, Tokyo +4FUi
IIIUJ Bill (1) The scope of claims in the specification of the present application is amended as a separate sheet. (2) “Compressed graphite paper” in page 1s8, line 11 of the specification of the present application
(Correct the phrase "compressed graphite paper (graphite sheet)." (3) Correct the phrase "mixture" on page 12, line 8, to read "mixture (porous material)." (4) The third line from the bottom of page 12 says “mixture”.
Corrected as "mixture (material for dense layer)". (5) Insert a separate sheet after “Table 3” on page 14 and before “4. Brief explanation of the drawings” 2. Example 3 In place of the material for the dense layer in Example 1, the thickness 0.311II
An electrode substrate of the present invention having a two-layer structure was produced in the same manner as in Example 1, except that Graphite Sea) (Graphite Sea, manufactured by UCC) was used. Table 4 shows the physical properties of the electrode substrate. Note that the cross section of the hollow passageway was approximately circular, and its diameter was approximately 0.811 m. 2. Claims (1) Consisting of a porous layer and a dense layer, with an equivalent diameter of 0.5~
For a carbonaceous fuel cell with a two-layer structure, characterized in that a plurality of continuous hollow pores having a cross section of 3 m are arranged in parallel from one end face to the opposite end face approximately at the center of the thickness of the porous layer. electrode substrate. (2) The porous layer has an average bulk density of 0.3 to 1.0 g/cm'' and a gas permeability of 2Q ml/ca@hr-*LAq or more, and the porous layer has a gas permeability of 1. 0g/cm
'Average bulk density over 0.2ml 7cm hrs
The electrode substrate according to claim 1, having a gas permeability of +m+xAq or less. (3) The pores of the porous layer are open holes, and the 60-
The electrode substrate according to claim 1 or 2, wherein the electrode substrate has a diameter within the range of 10 to 100 tt. (4) The electrode substrate according to any one of claims 1 to 3, wherein the dense layer occupies 1/2 or less of the total thickness of the substrate. (5) The electrode substrate according to any one of claims 1 to 4, wherein the dense layer is a graphite sheet.
Claims (1)
３間の断面を有する連続した中空孔道を多孔性層の厚さ
１７）ｋｌは中心部に一端面から相対する端面に向かっ
て平行に複数本有することを特徴とする二層構造の炭素
質燃料電池用電極基板。 （２）多孔性層が０．３〜１．０ ｇｌｏｎ”の平均嵩
密度及び２０ ｍ１１０ｎ−ｈｒ−ｗｎＡｑ、以上のガ
ス透過度を有しておシ、チ密層が１．０ ｇ／ｃｒｎ”
以上の平均嵩密度及び０．２ ｍｌ／ｃＰｈｒ−ｍｍＡ
ｑ、以下のガス透過度を有していることを特徴とする特
許請求の範囲第１項に記載の電極基板。 （３）多孔性層の細孔は開細孔であシ、旦っその６０チ
以上が１０〜１００μの範囲内の径を有することを特徴
とする特許請求の範囲第１項又は第２項に記載のｉ［５
極基板０ （４）チ密層が基板全厚さの１／２以下を占めることを
特徴とする特許請求の範囲第１１Ｆｌ乃至第３ｖ１のい
ずれかに記載の電極基板。[Claims] (]) Consists of a porous layer and a dense layer, and has an equivalent diameter of 0.5 to
A carbonaceous fuel with a two-layer structure, characterized in that the porous layer has a plurality of continuous hollow pores having a cross section of 17) kl in the center in parallel from one end surface to the opposite end surface. Electrode substrate for batteries. (2) The porous layer has an average bulk density of 0.3 to 1.0 glon'' and a gas permeability of 20 m110 n-hr-wnAq or more, and the dense layer has an average bulk density of 1.0 g/crn. ”
Average bulk density of 0.2 ml/cPhr-mmA
The electrode substrate according to claim 1, having a gas permeability of q or less. (3) The pores of the porous layer are open pores, and at least 60 of the pores have a diameter within the range of 10 to 100μ. i [5
Electrode substrate 0 (4) The electrode substrate according to any one of claims 11F1 to 3V1, characterized in that the dense layer occupies 1/2 or less of the total thickness of the substrate.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57174960A JPS5966063A (en) | 1982-10-05 | 1982-10-05 | Electrode base plate for fuel cell |
| US06/535,913 US4522895A (en) | 1982-10-05 | 1983-09-26 | Multilayer fuel cell electrode substrate having elongated holes for feeding reactant gases |
| GB08326048A GB2128395B (en) | 1982-10-01 | 1983-09-29 | Fuel cell electrode substrate having elongated holes for feeding reactant gases |
| FR8315622A FR2534071B1 (en) | 1982-10-01 | 1983-09-30 | FUEL CELL ELECTRODE SUBSTRATE HAVING ELONGATE HOLES FOR REACTIVE GAS SUPPLY |
| DE19833335638 DE3335638A1 (en) | 1982-10-01 | 1983-09-30 | SUPPORT MATERIALS FOR FUEL CELL ELECTRODES PROVIDED WITH LONG HOLES FOR THE SUPPLY OF THE GAS-SHAPED REACTANT |
| CA000438143A CA1205857A (en) | 1982-10-05 | 1983-09-30 | Multilayer fuel cell electrode substrate having elongated holes for feeding reactant gases |
| US06/712,655 US4580337A (en) | 1982-10-05 | 1985-03-18 | Process for producing electrode substrate for fuel cells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57174960A JPS5966063A (en) | 1982-10-05 | 1982-10-05 | Electrode base plate for fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5966063A true JPS5966063A (en) | 1984-04-14 |
Family
ID=15987741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57174960A Pending JPS5966063A (en) | 1982-10-01 | 1982-10-05 | Electrode base plate for fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5966063A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5978459A (en) * | 1982-10-27 | 1984-05-07 | Toray Ind Inc | Electrode plate for fuel cell |
| JP2008153091A (en) * | 2006-12-19 | 2008-07-03 | Toyota Motor Corp | Fuel cell |
-
1982
- 1982-10-05 JP JP57174960A patent/JPS5966063A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5978459A (en) * | 1982-10-27 | 1984-05-07 | Toray Ind Inc | Electrode plate for fuel cell |
| JPH0437545B2 (en) * | 1982-10-27 | 1992-06-19 | Toray Industries | |
| JP2008153091A (en) * | 2006-12-19 | 2008-07-03 | Toyota Motor Corp | Fuel cell |
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