JPS64340B2 - - Google Patents
Info
- Publication number
- JPS64340B2 JPS64340B2 JP58085699A JP8569983A JPS64340B2 JP S64340 B2 JPS64340 B2 JP S64340B2 JP 58085699 A JP58085699 A JP 58085699A JP 8569983 A JP8569983 A JP 8569983A JP S64340 B2 JPS64340 B2 JP S64340B2
- Authority
- JP
- Japan
- Prior art keywords
- less
- graphite powder
- weight
- aspect ratio
- molded body
- 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
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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Fuel Cell (AREA)
- Ceramic Products (AREA)
Description
本発明は、炭素成形体及びその製造法に関し、
この成形体は水素、アルコール等を燃料とする燃
料電池のセパレーター等に好適なものである。
燃料電池は、通常いくつかの単位電池を直列に
接続して使用される。各電池間は電解液、ガス等
に対して不通気性のセパレーターで仕切られてい
る。セパレーターは電気に対しては高伝導性であ
ることが必要である。
従来この種の材料としては黒鉛粉末に熱硬化性
樹脂等の結合剤を加え、混練、成形、焼成し、さ
らに不通気性、電導性を向上させるため前記結合
剤を含浸し、焼成して製品とする方法がある。こ
の方法は焼成しているので耐熱性が良好である利
点があるが、焼成によつて気孔が生ずるため、通
常は含浸工程が必要となり、コスト高になる欠点
がある。
さらに黒鉛粉末を熱硬化性樹脂を用いて成形し
たままで製品とする方法もある（特公昭50−
11355）。熱硬化性樹脂自体は電導性でないため、
この成形体の電導性を高めるためには前記公報に
記載されているように黒鉛粉末の粒度分布を細か
く規定しなければならず、工程が複雑になるばか
りでなく、また通常の粉砕等でその粒度にして
も、成形体の緻密性等が十分でないため、電導性
も良好とは云えない。
本発明は黒鉛粉末として特定のものを使用して
粉末の充填を高め、熱硬化性樹脂の添加量を少な
くすることにより、緻密にして不通気性、電導性
にも優れた成形体を得ることに成功したものであ
る。
熱硬化性樹脂を硬化しただけで本発明の成形体
が十分に電導性が高いのは、黒鉛粉末と熱硬化性
樹脂とは漏れ性が悪いため、樹脂の量が少ない場
合は樹脂は黒鉛粉末同志の接触面には殆んど存在
せず、粒子間に形成される空所に優先的に存在す
ることになるので粒子同志間の接触面での電導性
が下らないことに起因するものと推定される。こ
のことは黒鉛粉末のみを圧縮してその比抵抗を測
定してみると本発明の成形体と大差がないことか
らも裏付けられる。
本発明において黒鉛粉末はアスペクト比が３以
下であることが必要である。アスペクト比は粒子
の長径と短径の比でこれが大きい程偏平であり、
最小が１で、これは球あるいは球状多角形であ
る。アスペクト比の測定法は走査型電子顕微鏡に
より写真撮影を行ない各粒子の長径及び短径をサ
ンプル数200〜300個について測定する。
黒鉛粉末のアスペクト比は通常天然黒鉛の場合
で50前後、人造黒鉛の粉砕品で５〜10位である。
このような偏平な粒子では充填性、成形性がよく
ないため、密度が上らず、不通気性、電導性等の
特性が満足すべきものにならない。
一般の黒鉛粉末はアスペクト比が大きい、即ち
比表面積が大きい為、成形に必要とする熱硬化性
樹脂等のバインダー量が多くなる。この為、低い
電気比抵抗の成形体を得るには特公昭50−11355
号に記載が有るようにイソプロピルアルコール等
の蒸発性有機溶媒を使用する等の工夫が必要とな
る。しかし蒸発性有機溶媒を使うと加熱、加圧成
形中に大量のガスが発生し、このガスが系外に排
出される際、ピンホール等が発生し、不通気性に
劣るものになる。本発明においては黒鉛粉末のア
スペクト比が３以下のものを用いることにより、
充填性に富み、少ないバインダー量で蒸発性有機
溶媒が不要となり、小さい電気比抵抗と不通気性
に優れた成形体を得ることができる。
本発明においては黒鉛粉末はアスペクト比が３
以下であることを必要とする。粒子は種々のアス
ペクト比のものの集合物となるが、本発明におい
ては大部分、即ち約70％（個数％）以上の粒子が
アスペクト比３以下であればよい。この範囲を越
えるとセパレーターのように薄板状の成形体を製
造する場合、ヒビ割れ等成形不良が多く発生した
り、成形密度が上らない。またアスペクト比が大
きいと、薄板成形の場合、板の両面より加圧する
のが普通であり、粒子の長手方向が板の面方向に
揃うので、板の厚さ方向に対しては導電性が低
く、燃料電池には不利である。
黒鉛粉末は細かいことが必要であるが、微粉の
みでも成形性が悪い、これに細粉が混合したもの
がよく、具体的には全体が104μｍ以下で、かつ
その10〜80％が50μｍ以下である。そして実際に
は篩によつて分級するので、全体が104μｍ以下
とは150メツシユの篩を用いたときその通過量が
90％以上のものであればよい。成形性が悪いと成
形体密度の均一性に欠け、粗密の部分が生じかつ
ヒビ不良が発生し易い。
この黒鉛粉末のアスペクト比については、黒鉛
の種類により粉砕しただけでアスペクト比が３以
下のものはそのままでもよいが、通常は、磨砕機
や混和機に黒鉛粉末と水を入れ、湿式回転等によ
り磨砕をしながら粉砕し、或いは粉砕後傾斜振動
板のような装置で処理して、アスペクト比を３以
下とする。
本発明の成形体はこれらの黒鉛粉末が10〜25重
量％の熱硬化性樹脂によつて結合されている。熱
硬化性樹脂としては、好ましくはフエノール樹脂
であるが、その他のエポキシ樹脂、不飽和ポリエ
ステル樹脂なども使用可能である。フエノール樹
脂が好ましいものは成形体の特性が優れているこ
と、かつ安価である等の理由による。
樹脂の量が10重量％未満では成形体、特に薄板
の場合、実用的強度がなく、また流体に対する不
浸透性も十分でない。反面、25重量％を越えると
電気伝導性が下る。
炭素成形体は黒鉛粉末が高密度に充填されてお
り、樹脂の量は比較的わずかなので、電気比抵抗
が0.03Ω−cm以下、通気率１×10-4cm2／秒以下で
あり、電池のセパレーターとしても十分に実用化
可能なものである。また曲げ強度は600Kg／cm2以
上であり問題はない。セパレーターでは通常その
厚さは0.1〜５mmの範囲で使用される。そして一
般にはセパレーターは、第１図の成形法からわか
るように片面あるいは両面（図示）に多数の溝が
設けられている。なお、前記で通気率は室温にお
けるH2ガス１気圧での値である。
次に製法について説明する。
熱硬化性樹脂は成形体の硬化時に気泡が生じな
いようにするため、不揮発分が65％以上のものが
適する。また樹脂の粘度が低過ぎても成形体の形
状保持等に好ましくないので、27000センチポア
ズ（25℃）以上が適当である。
黒鉛粉末と樹脂の混合は硬化後の樹脂含有量
が、10〜25重量％になるようにするが、それには
樹脂として不揮発分65％以上のものを使用した場
合、黒鉛粉末100重量部に対し、樹脂12〜3.4重量
部使用すればよい。
これらの混合物は充分混練し、ペースト状にす
るが、その可塑性を向上させるため、デンプン、
デキストリン、小麦粉を少量、例えば0.1〜２％
程度混合することは効果がある。混練は室温でよ
いが好ましくは0.2〜２Kg／cm2程度の加圧状態で
混練する。
成形は例えば第１図のような方法で行なう。図
で１は型枠で２は上型、３は下型である。図では
上型と下型は互いに直交方向に溝が設けてある。
混練したペーストの所定量を下型３の上にほぼ一
様に載せ、これを型枠１に入れ、上型２を用い
て、上下から圧縮成形する。これを型に入れたま
ま常圧、100℃程度で予熱する。次いで150〜200
℃程度、100〜200Kg／cm2程度でホツトプレス成形
する。５〜20分程度保持した後室温まで冷却す
る。
実施例
人造黒鉛を粉砕機アトマイザー（不二パウダル
株式会社製）で粉砕し、さらにマルメライザー
（同社製）で磨砕し、分級して次の黒鉛粉末を得
た。
アスペクト比 粒 度
３以下 104μｍ篩下、44μｍ篩下
90％ 全 量 50％
結合剤には、フエノール樹脂（昭和ユニオン合
成(株)製、BXL−274）で粘度は32000CPS（25℃）、
不揮発分（135℃、１時間）73.6％である。
上記黒鉛粉末100重量部にフエノール樹脂22重
量部を加え、加圧混和機（混和機内に回転する双
腕翼を備え、上部の蓋でペーストを加圧）で圧力
1.0Kg／cm2（前記蓋の圧力）にして室温で混和し
た。
混和ペーストを第１図に示す装置で薄板に成形
した。初めに型に入れたまま常圧下、100℃で20
分間予熱し、次いで160℃、180Kg／cm2で５分間保
持する。ここで得られた薄板はやや反りがあつた
のでこれを平板にはさんで、200℃180Kg／cm2で５
分間保持した。
ここで得られた薄板は以下の特性を有し、電池
のセパレーターに要求される特性を満足してい
た。
嵩密度、電気比抵抗、曲げ強さ、通気率
（ｇ／cm3）（Ω−cm）（Kg／cm2）（cm2／sec）
1.81、 0.008、 650、 10-7
比較例 １
人造黒鉛を粉砕機アトマイザーで粉砕分級して
次の黒鉛粉末を得た。
アスペクト比 粒 度
３〜７ 104μｍ篩下 44μｍ篩下
70％ 全 量 53％
以下、実施例と同様にして薄板を作製した。特
性は下記の通りであつた。
嵩密度、電気比抵抗、曲げ強さ、通気率
（ｇ／cm3）（Ω−cm）（Kg／cm2）（cm2／sec）
1.79、 0.009、 350、 10-4
比較例 ２
人造黒鉛を粉砕機アトマイザーで粉砕し、分級
して次の粒度分布の黒鉛粉末を得た。
53μｍ以下 53〜88μｍ 88〜177μｍ
８重量％ 31重量％ 61重量％
又、これらの黒鉛粉末のいずれもアスペクト比
が３以上のものが70％以上を占めているものであ
つた。
市販イソプロピルアルコールをフエノール樹脂
に20％添加したものを20重量部、そして前記黒鉛
粉末を80重量部を混合しスラリーとした。このス
ラリーを乾燥して金型内に５Kg／cm2の加圧下93℃
まで４分で予備加熱を行ない他の条件は実施例と
同様にして10枚の薄板を成形した。この10枚の薄
板成形体と実施例で製作した10枚の薄板成形体の
通気率測定結果を第１表に示す。
The present invention relates to a carbon molded body and a method for manufacturing the same,
This molded body is suitable for separators of fuel cells using hydrogen, alcohol, etc. as fuel. A fuel cell is usually used by connecting several unit cells in series. Each battery is separated by a separator that is impermeable to electrolyte, gas, and the like. The separator needs to be highly conductive to electricity. Conventionally, this type of material has been manufactured by adding a binder such as a thermosetting resin to graphite powder, kneading it, molding it, firing it, and then impregnating it with the binder and firing it to improve its impermeability and conductivity. There is a way to do this. This method has the advantage of good heat resistance because it is fired, but since pores are created by firing, an impregnation step is usually required, which has the disadvantage of increasing costs. Furthermore, there is also a method of molding graphite powder using thermosetting resin and making it into a product (Special Public Interest Publication in 1973-
11355). Since thermosetting resin itself is not electrically conductive,
In order to improve the electrical conductivity of this compact, the particle size distribution of the graphite powder must be precisely defined as described in the above publication, which not only complicates the process, but also makes it difficult to control the particle size by regular grinding, etc. Even in terms of particle size, the compactness of the molded body is not sufficient, so the electrical conductivity cannot be said to be good. The present invention uses a specific graphite powder to increase powder filling and reduce the amount of thermosetting resin added, thereby obtaining a dense molded body with excellent impermeability and electrical conductivity. It was a success. The reason why the molded article of the present invention has sufficiently high conductivity even when the thermosetting resin is only cured is because graphite powder and thermosetting resin have poor leakage properties.If the amount of resin is small, the resin should be replaced with graphite powder. It is presumed that this is due to the fact that the conductivity at the contact surfaces between particles does not deteriorate because it is almost absent at the contact surfaces between particles and preferentially exists in the spaces formed between particles. be done. This is supported by the fact that when graphite powder alone was compressed and its specific resistance was measured, there was no significant difference from the compact of the present invention. In the present invention, it is necessary that the graphite powder has an aspect ratio of 3 or less. Aspect ratio is the ratio of the major axis to the minor axis of a particle, and the larger this is, the flatter it is.
The minimum is 1, which is a sphere or a spherical polygon. The aspect ratio is measured by taking a photograph using a scanning electron microscope and measuring the major axis and minor axis of each particle for 200 to 300 samples. The aspect ratio of graphite powder is usually around 50 for natural graphite and 5 to 10 for crushed artificial graphite.
Such flat particles have poor filling properties and moldability, so the density cannot be increased and properties such as air impermeability and electrical conductivity are not satisfactory. Since ordinary graphite powder has a large aspect ratio, that is, a large specific surface area, a large amount of binder such as thermosetting resin is required for molding. For this reason, in order to obtain molded bodies with low electrical resistivity,
As described in the above issue, it is necessary to take measures such as using an evaporable organic solvent such as isopropyl alcohol. However, when an evaporative organic solvent is used, a large amount of gas is generated during heating and pressure molding, and when this gas is discharged from the system, pinholes and the like occur, resulting in poor air impermeability. In the present invention, by using graphite powder with an aspect ratio of 3 or less,
It has excellent filling properties, a small amount of binder eliminates the need for evaporable organic solvents, and it is possible to obtain a molded article with low electrical resistivity and excellent air impermeability. In the present invention, the graphite powder has an aspect ratio of 3.
The following must be true. Particles are a collection of particles with various aspect ratios, but in the present invention, it is sufficient that most of the particles, that is, about 70% (number %) or more, have an aspect ratio of 3 or less. If it exceeds this range, when producing a thin plate-like molded product such as a separator, many molding defects such as cracks will occur, and the molding density will not increase. Also, when the aspect ratio is large, when forming a thin plate, pressure is normally applied from both sides of the plate, and the longitudinal direction of the particles is aligned with the plane of the plate, so the conductivity is low in the thickness direction of the plate. , which is disadvantageous for fuel cells. Graphite powder needs to be fine, but even fine powder alone has poor moldability, so it is best to mix it with fine powder. Specifically, the entire powder is 104 μm or less, and 10 to 80% of it is 50 μm or less. be. In reality, the classification is done using a sieve, so if the overall size is 104 μm or less, the amount that passes through a 150-mesh sieve is the
It is sufficient if it is 90% or more. If the moldability is poor, the density of the molded product will lack uniformity, resulting in uneven areas and cracking. Regarding the aspect ratio of this graphite powder, depending on the type of graphite, if it is simply crushed and has an aspect ratio of 3 or less, it may be left as is, but normally, graphite powder and water are placed in a grinder or mixer, and wet rotation etc. It is pulverized while grinding, or after pulverization, it is treated with a device such as an inclined diaphragm so that the aspect ratio is 3 or less. In the molded article of the present invention, these graphite powders are bonded together by 10 to 25% by weight of a thermosetting resin. The thermosetting resin is preferably a phenolic resin, but other epoxy resins, unsaturated polyester resins, etc. can also be used. Phenol resins are preferred because they have excellent molded product properties and are inexpensive. If the amount of resin is less than 10% by weight, the molded product, especially a thin plate, will not have practical strength and will not have sufficient impermeability to fluids. On the other hand, if it exceeds 25% by weight, the electrical conductivity decreases. The carbon molded body is densely filled with graphite powder, and the amount of resin is relatively small, so the electrical resistivity is less than 0.03 Ω-cm, the air permeability is less than 1 x 10 -4 cm 2 /sec, and it is suitable for batteries. It can also be put to practical use as a separator. Moreover, the bending strength is 600Kg/cm 2 or more, so there is no problem. The thickness of the separator is usually in the range of 0.1 to 5 mm. Generally, a separator is provided with a large number of grooves on one or both sides (as shown), as can be seen from the molding method shown in FIG. Note that the air permeability mentioned above is a value at 1 atmosphere of H 2 gas at room temperature. Next, the manufacturing method will be explained. The thermosetting resin should preferably have a non-volatile content of 65% or more in order to prevent bubbles from forming when the molded article is cured. Also, if the viscosity of the resin is too low, it is not preferable for maintaining the shape of the molded product, so a viscosity of 27,000 centipoise (25° C.) or more is suitable. When mixing graphite powder and resin, the resin content after curing should be 10 to 25% by weight. However, if a resin with a non-volatile content of 65% or more is used, it is necessary to , 12 to 3.4 parts by weight of resin may be used. These mixtures are sufficiently kneaded to form a paste, but to improve its plasticity, starch,
Dextrin, a small amount of flour, e.g. 0.1-2%
Mixing to some extent is effective. The kneading may be carried out at room temperature, but preferably under pressure of about 0.2 to 2 kg/cm 2 . The molding is performed, for example, by the method shown in FIG. In the figure, 1 is the formwork, 2 is the upper mold, and 3 is the lower mold. In the figure, grooves are provided in the upper mold and the lower mold in directions perpendicular to each other.
A predetermined amount of the kneaded paste is placed almost uniformly on the lower mold 3, placed in the mold 1, and compression molded from above and below using the upper mold 2. Place this in the mold and preheat to around 100℃ at normal pressure. then 150-200
Hot press molding at about 100 to 200 kg/cm 2 at about ℃. After holding for about 5 to 20 minutes, cool to room temperature. Example Artificial graphite was pulverized with an atomizer (manufactured by Fuji Powdal Co., Ltd.), and further ground with a Marumerizer (manufactured by Fuji Powder Co., Ltd.), and classified to obtain the following graphite powder. Aspect ratio Particle size 3 or less 104 μm under sieve, 44 μm under sieve 90% Total amount 50% The binder is phenol resin (manufactured by Showa Union Gosei Co., Ltd., BXL-274), with a viscosity of 32000 CPS (25 °C),
Non-volatile content (135°C, 1 hour) is 73.6%. Add 22 parts by weight of phenolic resin to 100 parts by weight of the above graphite powder, and pressurize the paste with a pressurized mixer (equipped with a rotating double-arm blade inside the mixer and pressurize the paste with the upper lid).
The mixture was mixed at room temperature at a pressure of 1.0 Kg/cm 2 (the pressure of the lid). The mixed paste was formed into a thin plate using the apparatus shown in FIG. Initially, it was placed in a mold at 100℃ under normal pressure for 20 minutes.
Preheat for minutes, then hold at 160°C, 180Kg/cm 2 for 5 minutes. The thin plate obtained here was slightly warped, so it was sandwiched between flat plates and heated at 200℃ and 180Kg/cm 2 for 5 minutes.
Hold for minutes. The thin plate obtained here had the following properties and satisfied the properties required for battery separators. Bulk density, electrical resistivity, bending strength, air permeability (g/cm 3 ) (Ω-cm) (Kg/cm 2 ) (cm 2 /sec) 1.81, 0.008, 650, 10 -7 Comparative example 1 Artificial graphite was crushed and classified using a crusher atomizer to obtain the following graphite powder. Aspect ratio Particle size 3 to 7 104 μm under sieve 44 μm under sieve 70% Total amount 53% Below, thin plates were produced in the same manner as in the examples. The characteristics were as follows. Bulk density, electrical resistivity, bending strength, air permeability (g/cm 3 ) (Ω-cm) (Kg/cm 2 ) (cm 2 /sec) 1.79, 0.009, 350, 10 -4 Comparative example 2 Artificial graphite was crushed using a crusher atomizer and classified to obtain graphite powder with the following particle size distribution. 53 μm or less 53 to 88 μm 88 to 177 μm 8% by weight 31% by weight 61% by weight All of these graphite powders had an aspect ratio of 3 or more, accounting for 70% or more. A slurry was prepared by mixing 20 parts by weight of commercially available isopropyl alcohol with 20% addition of phenolic resin and 80 parts by weight of the graphite powder. This slurry was dried and placed in a mold at 93°C under a pressure of 5 kg/ cm2.
Ten thin plates were molded under the same conditions as in Example except that preheating was carried out for 4 minutes. Table 1 shows the results of measuring the air permeability of these 10 thin plate molded bodies and the 10 thin plate molded bodies manufactured in Examples.
【表】【table】
【表】
以上の結果より本発明により得られる薄板は電
池用セパレーターとして信頼性の高い気密性を有
していることが分る。[Table] From the above results, it can be seen that the thin plate obtained by the present invention has a highly reliable airtightness as a battery separator.
第１図は、本発明の成形に使用される鋳型の１
例である。
１……型枠、２……上型、３……下型。
Figure 1 shows one of the molds used for molding of the present invention.
This is an example. 1...Formwork, 2...Upper mold, 3...Lower mold.
Claims (1)
鉛粉末を骨材とする成形体において、該黒鉛粉末
はアスペクト比３以下、粒度が104μｍ以下でか
つその10〜80％が50μｍ以下であり、前記成形体
の電気比抵抗が0.03Ω−cm以下、通気率が１×
10-4cm2／秒以下である炭素成形体。 ２ 成形体の厚さが0.1mm〜５mmである特許請求
の範囲第１項記載の炭素成形体。 ３ アスペクト比が３以下、粒度が104μｍ以下
でかつその10〜80％が50μｍ以下である黒鉛粉末
100重量部に対し、不揮発分65％以上（135℃、１
時間、JIS Ｋ−6909）の熱硬化性樹脂12〜34重量
部を加え、混練し、成形した後、硬化させること
を特徴とする電気比抵抗0.03Ω−cm以下、通気率
１×10-4cm2／秒以下である炭素成形体の製造法。[Scope of Claims] 1. In a molded article containing 10 to 25% by weight of a thermosetting resin as a binder and graphite powder as an aggregate, the graphite powder has an aspect ratio of 3 or less, a particle size of 104 μm or less, and a particle size of 10 to 25% by weight. 80% is 50 μm or less, the electrical resistivity of the molded body is 0.03 Ω-cm or less, and the air permeability is 1×
10 -4 cm 2 /second or less. 2. The carbon molded body according to claim 1, wherein the thickness of the molded body is 0.1 mm to 5 mm. 3 Graphite powder with an aspect ratio of 3 or less, a particle size of 104 μm or less, and 10 to 80% of which is 50 μm or less
65% or more non-volatile content per 100 parts by weight (135℃, 1
12 to 34 parts by weight of thermosetting resin according to JIS K-6909) is added, kneaded, molded, and then cured.Electrical resistivity 0.03Ω-cm or less, air permeability 1×10 -4 A method for producing a carbon molded body with a speed of cm 2 /sec or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58085699A JPS59213610A (en) | 1983-05-18 | 1983-05-18 | Carbonaceous molded body and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58085699A JPS59213610A (en) | 1983-05-18 | 1983-05-18 | Carbonaceous molded body and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59213610A JPS59213610A (en) | 1984-12-03 |
| JPS64340B2 true JPS64340B2 (en) | 1989-01-06 |
Family
ID=13866070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58085699A Granted JPS59213610A (en) | 1983-05-18 | 1983-05-18 | Carbonaceous molded body and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59213610A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006106609A1 (en) | 2005-04-04 | 2006-10-12 | Showa Denko K.K. | Electrically conducting curable resin composition, cured product thereof and molded article of the same |
| US7329698B2 (en) | 2001-08-06 | 2008-02-12 | Showa Denko K.K. | Conductive curable resin composition and separator for fuel cell |
| EP2015384A1 (en) | 2007-06-15 | 2009-01-14 | TUBITAK-Turkiye Bilimsel ve Teknolojik ve Arastima Kurumu | A method for producing recyclable bipolar plate |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61161664A (en) * | 1985-01-09 | 1986-07-22 | Mitsubishi Pencil Co Ltd | Manufacture of separator for fuel cell |
| EP1220349B1 (en) | 1996-08-08 | 2008-11-26 | Hitachi Chemical Co., Ltd. | Graphite particles and lithium secondary battery using the same as negative electrode |
| EP0935303A4 (en) * | 1997-07-28 | 2005-03-09 | Nisshin Spinning | SEPARATOR FOR FUEL CELLS |
| WO1999049530A1 (en) * | 1998-03-20 | 1999-09-30 | Osaka Gas Company Limited | Separator for fuel cell and method for producing the same |
| JPH11297338A (en) * | 1998-04-10 | 1999-10-29 | Nisshinbo Ind Inc | Separator for polymer electrolyte fuel cell and method of manufacturing the same |
| ATE268060T1 (en) * | 1998-09-16 | 2004-06-15 | Schunk Kohlenstofftechnik Gmbh | PLASTIC PLATE AND METHOD FOR PRODUCING SAME |
| US6180275B1 (en) * | 1998-11-18 | 2001-01-30 | Energy Partners, L.C. | Fuel cell collector plate and method of fabrication |
| JP4743356B2 (en) * | 2000-05-15 | 2011-08-10 | 日清紡ホールディングス株式会社 | Manufacturing method of fuel cell separator, fuel cell separator, and polymer electrolyte fuel cell |
| US7049021B2 (en) | 2000-06-29 | 2006-05-23 | Osaka Gas Company Limited | Conductive composition for solid polymer type fuel cell separator, solid polymer type fuel cell separator, solid polymer type fuel cell and solid polymer type fuel cell system using the separator |
| JP5015387B2 (en) * | 2001-06-27 | 2012-08-29 | イビデン株式会社 | Solid polymer fuel cell separator |
| US20060234108A1 (en) * | 2003-02-13 | 2006-10-19 | Eiki Tsushima | Method for producing separator of fuel cell |
| JP5979529B2 (en) * | 2011-10-24 | 2016-08-24 | パナソニックＩｐマネジメント株式会社 | Manufacturing method of fuel cell separator |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57247B2 (en) * | 1973-05-22 | 1982-01-06 | ||
| JPS5011355A (en) * | 1973-05-29 | 1975-02-05 | ||
| JPS5023410A (en) * | 1973-07-04 | 1975-03-13 | ||
| JPS5253970A (en) * | 1975-10-28 | 1977-04-30 | Toray Industries | Fiberrreinforced plastics having electric condustivity |
| JPS5453677A (en) * | 1977-10-06 | 1979-04-27 | Showa Denko Kk | Manufacture of arc carbon electrode |
-
1983
- 1983-05-18 JP JP58085699A patent/JPS59213610A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7329698B2 (en) | 2001-08-06 | 2008-02-12 | Showa Denko K.K. | Conductive curable resin composition and separator for fuel cell |
| US7338730B2 (en) | 2001-08-06 | 2008-03-04 | Showa Denko K.K. | Conductive curable resin composition and separator for fuel cell |
| WO2006106609A1 (en) | 2005-04-04 | 2006-10-12 | Showa Denko K.K. | Electrically conducting curable resin composition, cured product thereof and molded article of the same |
| EP2015384A1 (en) | 2007-06-15 | 2009-01-14 | TUBITAK-Turkiye Bilimsel ve Teknolojik ve Arastima Kurumu | A method for producing recyclable bipolar plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59213610A (en) | 1984-12-03 |
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