JP2001085031A - Gas impermeable carbon plate for fuel cell - Google Patents
Gas impermeable carbon plate for fuel cellInfo
- Publication number
- JP2001085031A JP2001085031A JP26147499A JP26147499A JP2001085031A JP 2001085031 A JP2001085031 A JP 2001085031A JP 26147499 A JP26147499 A JP 26147499A JP 26147499 A JP26147499 A JP 26147499A JP 2001085031 A JP2001085031 A JP 2001085031A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- polymer material
- carbon plate
- resin
- high polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- Fuel Cell (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、燃料電池用カーボ
ンプレートに関する。詳しくは、本発明は、薄型、軽
量、高出力、低価格の燃料電池用セパレーター等に使用
されるガス不透過カーボンプレートに関する。[0001] The present invention relates to a carbon plate for a fuel cell. More specifically, the present invention relates to a gas-impermeable carbon plate used for a thin, lightweight, high-output, low-cost fuel cell separator and the like.
【０００２】[0002]
【従来の技術】従来、燃料電池用の構成材であるガスプ
レート、冷却プレート等は、カーボンの大きなブロック
を切断して切削・研削し、その後、ＮＣ装置などで加工
してフェノール樹脂などを含浸し、窒素雰囲気で高温焼
成することにより得られる気密性をもったカーボンプレ
ート等で構成されていた。2. Description of the Related Art Conventionally, a gas plate, a cooling plate, and the like, which are components for a fuel cell, are cut and ground by cutting a large block of carbon, and then processed by an NC device or the like to impregnate a phenol resin or the like. Then, it was constituted by an airtight carbon plate or the like obtained by firing at a high temperature in a nitrogen atmosphere.
【０００３】しかしながら、かかる従来のカーボンプレ
ートは、原料のカーボン素材は嵩密度が高く緻密で加工
が難しく高価な上、該カーボン素材から直接削り出すた
め機械加工費が高く、結果として一枚のプレートの価格
は非常に高いものとなっていた。However, such a conventional carbon plate has a problem that the raw material carbon material has a high bulk density, is dense, is difficult to process, is expensive, and has a high machining cost because it is directly cut from the carbon material. Prices were very high.
【０００４】また、素材の機械的強度や加工性などか
ら、プレート厚みはある程度以上（５〜８ｍｍ以上）必
要であるから、燃料電池スタックを構成した場合、非常
に重いものとなり、例えば５０セルで１５０ｋｇ以上も
の重さとなっていた。このようなことから、燃料電池は
コストが高く、また大きい上に重く、そのため実用化に
大きな障害となっている。[0004] Further, since the plate thickness needs to be more than a certain level (5 to 8 mm or more) due to the mechanical strength and workability of the material, the fuel cell stack becomes very heavy, for example, 50 cells. It weighed more than 150 kg. For these reasons, fuel cells are expensive, large, and heavy, which is a major obstacle to their practical use.
【０００５】かかる問題点を解決する手段として、カー
ボンの不織布や薄板等の基板に高分子材料を含浸・硬化
させたカーボンプレートを用いることが提案されている
（特開平９−１３４７３２号公報）。しかしながら、こ
こで提案された高分子材料含浸カーボンプレートは、高
分子材料の含浸方法が単なる減圧含浸であるため、高分
子材料とカーボンとの密着性が悪く、含浸された高分子
材料が縮んで隙間が生じる場合があるので、燃料電池に
した際、ガス圧力を上げるとガスのリークが発生しやす
い傾向にあった。As a means for solving such a problem, it has been proposed to use a carbon plate in which a polymer material is impregnated and cured on a substrate such as a carbon nonwoven fabric or a thin plate (Japanese Patent Application Laid-Open No. Hei 9-134732). However, the polymer material-impregnated carbon plate proposed here has poor adhesion between the polymer material and carbon because the method of impregnation of the polymer material is simply vacuum impregnation, and the impregnated polymer material shrinks. Since a gap may be formed, when a fuel cell is used, when the gas pressure is increased, gas leakage tends to occur.
【０００６】したがって、低価格で軽量且つ薄型の燃料
電池であって、ガスのリークがないものを提供しうるカ
ーボンプレートの開発が望まれていた。Therefore, there has been a demand for the development of a carbon plate that can provide a low-cost, lightweight and thin fuel cell without gas leakage.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、燃料電池の
ガス圧を上げてもガスがリークすることがなく、薄型、
軽量、高出力、且つ低価格の燃料電池の実現を達成しう
る、燃料電池用ガス不透過カーボンプレートを提供する
ことを課題とする。SUMMARY OF THE INVENTION According to the present invention, a gas is not leaked even if the gas pressure of a fuel cell is increased, and the fuel cell is thin.
It is an object of the present invention to provide a gas-impermeable carbon plate for a fuel cell, which can realize a lightweight, high-output, and low-cost fuel cell.
【０００８】[0008]
【課題を解決するための手段】本発明者らは、鋭意検討
を行った結果、所定形状に加工したガス透過性カーボン
プレートに高分子材料を減圧超音波含浸・硬化させるこ
とにより、上記課題を解決できることを見出し、本発明
を完成するに至った。Means for Solving the Problems As a result of intensive studies, the present inventors have solved the above-mentioned problems by impregnating and curing a polymer material in a gas-permeable carbon plate processed into a predetermined shape under reduced pressure ultrasonic waves. They have found that they can be solved, and have completed the present invention.
【０００９】すなわち、本発明は、所定形状に加工され
たガス透過性カーボンプレートに高分子材料を減圧超音
波含浸・硬化し、その全部又は一部をガス不透過性とし
たものである。That is, in the present invention, a gas permeable carbon plate processed into a predetermined shape is impregnated with a polymer material under reduced pressure ultrasonic wave and cured to make all or a part thereof gas impermeable.
【００１０】また、本発明は、前記ガス透過性カーボン
プレートの嵩密度が１〜３ｇ／ｃｍ 3であることを特徴
とする。また、本発明は、前記高分子材料が、エポキシ
樹脂、トリアジン樹脂化合物、ビスマレイミドトリアジ
ン樹脂化合物、ポリイミド樹脂、及びアクリル樹脂から
なる群から選択される樹脂材料であるものである。[0010] The present invention also relates to the gas permeable carbon.
The bulk density of the plate is 1-3 g / cm ThreeIs characterized by
And Further, the present invention provides the method, wherein the polymer material is an epoxy.
Resin, triazine resin compound, bismaleimide triazine
Resin compounds, polyimide resins, and acrylic resins
It is a resin material selected from the group consisting of:
【００１１】また、本発明は、前記高分子材料が、エポ
キシ樹脂と、トリアジン樹脂化合物、ビスマレイミドト
リアジン樹脂化合物、ポリイミド樹脂、及びアクリル樹
脂からなる群から選択される樹脂材料との樹脂混合物と
したものである。Further, the present invention provides a resin mixture of the polymer material, wherein the resin material is selected from the group consisting of an epoxy resin and a triazine resin compound, a bismaleimide triazine resin compound, a polyimide resin, and an acrylic resin. Things.
【００１２】[0012]
【発明の実施の形態】以下に、本発明の実施の形態を説
明する。本発明のガス不透過カーボンプレートは、所定
形状に加工されたガス透過性カーボンプレートに高分子
材料を減圧超音波含浸・硬化してなるものである。Embodiments of the present invention will be described below. The gas-impermeable carbon plate of the present invention is obtained by impregnating and curing a polymer material in a gas-permeable carbon plate processed into a predetermined shape under reduced pressure ultrasonic waves.
【００１３】（１）ガス透過性カーボンプレート 所定形状 本発明で高分子材料を含浸・硬化させるのに用いるカー
ボン素材は、微小孔を有するガス透過性の多孔質体であ
って、所定形状に加工されたカーボンプレートである。
加工方法は特に限定されず、カーボンのブロック等から
機械加工により切削、研磨する方法が一般的である。(1) Gas Permeable Carbon Plate Predetermined Shape The carbon material used for impregnating and curing the polymer material in the present invention is a gas permeable porous body having fine pores and is processed into a predetermined shape. It is a carbon plate.
The processing method is not particularly limited, and a method of cutting and polishing by machining from a block of carbon or the like is generally used.
【００１４】嵩密度 前記ガス透過性カーボンプレートの多孔度等は特に限定
されないが、好ましくは嵩密度が１〜３ｇ／ｃｍ3、よ
り好ましくは１〜２ｇ／ｃｍ3である。嵩密度が上記範
囲内である通常のポーラスなカーボン素材は、安価であ
り機械加工性がよいので好ましい。なお、本発明では、
減圧超音波含浸により高分子材料を含浸するので、従来
の単なる減圧含浸を用いた場合よりに比べ、嵩密度が低
い材料を用いても高分子材料とカーボンとの隙間が生ぜ
ずガスリークがない。よって、上記範囲で示したような
低い嵩密度を有するカーボンプレートを用いると、本発
明の効果がより顕著に発揮される。[0014] The porosity and the like of bulk density the gas permeable carbon plate is not particularly limited, preferably the bulk density of 1 to 3 g / cm 3, more preferably 1 to 2 g / cm 3. A normal porous carbon material having a bulk density within the above range is preferable because it is inexpensive and has good machinability. In the present invention,
Since the polymer material is impregnated by reduced-pressure ultrasonic impregnation, even if a material having a low bulk density is used, there is no gap between the polymer material and carbon and no gas leak as compared with the case where conventional simple vacuum impregnation is used. Therefore, when a carbon plate having a low bulk density as shown in the above range is used, the effects of the present invention are more remarkably exhibited.
【００１５】（２）高分子材料 本発明に用いられる高分子材料は、加熱等により硬化し
うる樹脂材料であれば特に制限はなく、例えばエポキシ
樹脂、トリアジン樹脂化合物、ビスマレイミドトリアジ
ン樹脂化合物、ポリイミド樹脂、アクリル樹脂、ウレタ
ンゴム、シリコーンゴム、天然ゴム、合成ゴム、シアノ
アクリレート等が挙げられる。これらのうち好ましく
は、エポキシ樹脂、トリアジン樹脂化合物、ビスマレイ
ミドトリアジン樹脂化合物、ポリイミド樹脂、及びアク
リル樹脂からなる群から選択される樹脂材料が用いられ
る。(2) Polymer Material The polymer material used in the present invention is not particularly limited as long as it is a resin material which can be cured by heating or the like. For example, epoxy resin, triazine resin compound, bismaleimide triazine resin compound, polyimide Resin, acrylic resin, urethane rubber, silicone rubber, natural rubber, synthetic rubber, cyanoacrylate, and the like. Of these, a resin material selected from the group consisting of an epoxy resin, a triazine resin compound, a bismaleimide triazine resin compound, a polyimide resin, and an acrylic resin is preferably used.
【００１６】前記高分子材料のより好ましい例として
は、エポキシ樹脂と、トリアジン樹脂化合物、ビスマレ
イミドトリアジン樹脂化合物、ポリイミド樹脂、及びア
クリル樹脂からなる群から選択される樹脂材料との樹脂
混合物が挙げられる。高分子材料としてエポキシ樹脂を
配合した樹脂混合物を用いることにより、カーボンプレ
ートの柔軟性及び機械的強度が向上し、さらには該カー
ボンプレートと高分子材料との密着性がよく隙間が生じ
ないので、燃料電池にした際、ガス圧力を上げてもガス
がリークすることがない。A more preferred example of the polymer material is a resin mixture of an epoxy resin and a resin material selected from the group consisting of a triazine resin compound, a bismaleimide triazine resin compound, a polyimide resin, and an acrylic resin. . By using a resin mixture in which an epoxy resin is blended as a polymer material, the flexibility and mechanical strength of the carbon plate are improved, and the adhesion between the carbon plate and the polymer material is good, and no gap is generated. When a fuel cell is used, gas does not leak even if the gas pressure is increased.
【００１７】エポキシ樹脂の配合割合は、混合する他の
樹脂材料の種類にもよるが、ビスマレイミドトリアジン
樹脂化合物と混合する場合、該樹脂化合物１００重量部
に対し好ましくは１〜５０重量部、より好ましくは１〜
２０重量部程度である。また、トリアジン樹脂と混合す
る場合、該樹脂１００重量部に対し好ましくは１〜８０
重量部、より好ましくは１〜３０重量部程度である。The mixing ratio of the epoxy resin depends on the type of the other resin material to be mixed, but when mixed with the bismaleimide triazine resin compound, preferably 1 to 50 parts by weight, more preferably 100 parts by weight, per 100 parts by weight of the resin compound. Preferably 1 to
It is about 20 parts by weight. When mixed with a triazine resin, preferably 1 to 80 parts by weight based on 100 parts by weight of the resin.
Parts by weight, more preferably about 1 to 30 parts by weight.
【００１８】（３）含浸・硬化 本発明のガス不透過カーボンプレートは、前記高分子材
料を、減圧超音波含浸法により、ガス透過性カーボンプ
レートに含浸して硬化させることにより得られる。(3) Impregnation and Curing The gas-impermeable carbon plate of the present invention is obtained by impregnating the polymer material with a gas-permeable carbon plate by a reduced pressure ultrasonic impregnation method and curing the carbon material.
【００１９】減圧超音波含浸 減圧超音波含浸法は、まず多孔質体である前記ガス透過
性カーボンプレートを溶融した高分子材料に浸漬しつつ
減圧下で空気を抜き、次いで超音波を作用させて多孔質
体の微小孔内に高分子材料を含浸させるというものであ
る。Reduced pressure ultrasonic impregnation In the reduced pressure ultrasonic impregnation method, air is evacuated under reduced pressure while the porous gas-permeable carbon plate is immersed in a molten polymer material, and then ultrasonic waves are applied. The polymer material is impregnated in the micropores of the porous body.
【００２０】減圧工程では、例えば真空ポンプ等を備え
た真空機械（真空炉）内に多孔質体を入れ、真空度１０
〜１０-6ｔｏｒｒ、より好ましくは１０〜１０-5ｔｏｒ
ｒの真空雰囲気まで空気を抜く。また、真空炉の温度は
２０〜３００℃とするのが好ましい。In the depressurizing step, for example, the porous body is placed in a vacuum machine (vacuum furnace) equipped with a vacuum pump or the like, and the pressure is reduced to 10 degrees.
10 to 10 -6 torr, more preferably 10 to 10 -5 torr
Remove the air to the vacuum atmosphere of r. Further, the temperature of the vacuum furnace is preferably set to 20 to 300 ° C.
【００２１】超音波含浸工程では、超音波発生装置から
周波数１０ｋＨｚ〜３００ｋＨｚ、好ましくは２０ｋＨ
ｚ〜１００ｋＨｚ、出力１０Ｗ〜１００ｋＷ、好ましく
は３０Ｗ〜３０ｋＷの超音波を作用させつつ多孔質体に
高分子材料を含浸させる。In the ultrasonic impregnation step, a frequency of 10 kHz to 300 kHz, preferably 20 kHz
The porous body is impregnated with the polymer material while applying ultrasonic waves of z to 100 kHz and output of 10 W to 100 kW, preferably 30 W to 30 kW.
【００２２】減圧超音波含浸法は、含浸させる溶融した
高分子材料を超音波で振動させるため、減圧下で効率よ
く含浸され、多孔質体の微小孔の細部まで高分子材料が
入り込み、隙間が生じにくい。よって、このような方法
で得られるカーボンプレートを燃料電池に用いた際、ガ
ス圧力を上げてもガスがリークすることがない。In the reduced pressure ultrasonic impregnation method, since the molten polymer material to be impregnated is vibrated by ultrasonic waves, the impregnated material is efficiently impregnated under reduced pressure, the polymer material penetrates into the fine pores of the porous body, and gaps are formed. It is unlikely to occur. Therefore, when a carbon plate obtained by such a method is used for a fuel cell, gas does not leak even if the gas pressure is increased.
【００２３】なお、本発明ではカーボンプレートの全部
に高分子材料を含浸させてもよいが、一部のみに含浸さ
せてもよい。一部のみに含浸させる場合は、カーボンプ
レートの所定箇所にマスキング等を行って含浸させれば
よい。In the present invention, the entire carbon plate may be impregnated with the polymer material, or only a part thereof may be impregnated. When only a part of the carbon plate is impregnated, it may be impregnated by performing masking or the like on a predetermined portion of the carbon plate.
【００２４】硬化 減圧超音波含浸の後、窒素ガス等の不活性ガスを真空炉
内に導入して大気圧に戻し、カーボンプレートを真空炉
から取り出し、所定温度で、好ましくは高温循環炉等で
加熱して、高分子材料を硬化させる。加熱温度は２０〜
３００℃程度、硬化時間は１〜８時間程度である。Curing After the reduced pressure ultrasonic impregnation, an inert gas such as nitrogen gas is introduced into a vacuum furnace to return to atmospheric pressure, the carbon plate is taken out of the vacuum furnace, and is heated at a predetermined temperature, preferably in a high-temperature circulating furnace. Heating cures the polymeric material. Heating temperature is 20 ~
The curing time is about 1 hour to about 8 hours.
【００２５】（４）ガス不透過カーボンプレート 本発明のガス不透過カーボンプレートは、その全部又は
一部が上述した高分子材料の含浸によりガス不透過性と
なっており、燃料電池用スタックの構成部材に使用する
ことができる。(4) Gas-impermeable carbon plate The gas-impermeable carbon plate of the present invention is entirely or partially gas-impermeable by impregnation with the above-mentioned polymer material, and constitutes a fuel cell stack. Can be used for members.
【００２６】そのうち、全部がガス不透過性となってい
るガス不透過カーボンプレートは、ガスまたは冷却水用
のマニホールド穴を有し、表側ガスと裏側ガスを分離す
るために使用するセパレーターとして用いることができ
る。また、ガスのマニホールド穴を有し、入口マニホー
ルド部からガスを電極部に導き出口マニホールド部へ通
すための溝部を設けたガスプレートとして用いることも
できる。また、冷却水のマニホールド穴を有し、入口マ
ニホールド部から冷却水を電極部に導き出口マニホール
ド部へ通すための溝部を設けた冷却プレートとして用い
ることもできる。Among them, the gas-impermeable carbon plate, which is entirely gas-impermeable, has a manifold hole for gas or cooling water, and is used as a separator used to separate the front gas and the back gas. Can be. Further, the gas plate can be used as a gas plate having a gas manifold hole and provided with a groove for guiding the gas from the inlet manifold to the electrode and passing the gas to the outlet manifold. Further, the cooling plate may be used as a cooling plate having a cooling water manifold hole and provided with a groove for guiding cooling water from the inlet manifold to the electrode and passing the cooling water to the outlet manifold.
【００２７】該構成部材は、前記セパレーターとガスプ
レートとが貼り合わされたセパレーター付きガスプレー
トであってもよい。また、ガスプレートとガスプレート
の間にセパレーターを挟み重ねて貼り合わせ、表側ガス
と裏側ガスを分離し各々ガスを電極部に導くようにした
ガス−ガスプレートであってもよい。また、セパレータ
ーとガスプレートと冷却プレートとが重ねて貼り合わさ
れ、片側にガス入口マニホールド部からガスを電極部に
導き出口マニホールド部へ通す溝部が形成され、他の片
側に冷却水入口マニホールド部から冷却水を電極部に導
き出口マニホールド部へ通す溝部が形成されたガス−冷
却プレートであってもよい。また、セパレーター、ガス
プレート、冷却プレート、セパレーター、ガスプレート
が重ねられて貼り合わされ、芯に冷却層が形成され、そ
の両側が冷却水とガスに分離され、両側外面にガス溝部
が形成された冷却部付ガス−ガスプレートであってもよ
い。[0027] The constituent member may be a gas plate with a separator in which the separator and the gas plate are bonded. Alternatively, a gas-gas plate may be used in which a separator is sandwiched between gas plates and bonded to each other to separate the front side gas and the back side gas and to guide each gas to the electrode portion. In addition, the separator, gas plate and cooling plate are stacked and bonded together, a groove is formed on one side to guide gas from the gas inlet manifold to the electrode and passed to the outlet manifold, and cooling is performed from the cooling water inlet manifold on the other side It may be a gas-cooling plate provided with a groove for guiding water to the electrode section and passing it to the outlet manifold section. In addition, a separator, a gas plate, a cooling plate, a separator, and a gas plate are stacked and bonded together, a cooling layer is formed on the core, cooling water and gas are separated on both sides, and a gas groove is formed on both outer surfaces. It may be a gas-gas plate with a part.
【００２８】また、前記ガス不透過カーボンプレート
は、その一部が高分子材料の含浸によりガス不透過性と
なっているものであってもよい。例えば、ガス又は冷却
水のマニホールド部相当の周辺部及び電極部の周辺部を
高分子材料により部分的にガス不透過性とし、中央の電
極部をガス透過性のままとし、その上に触媒層が形成さ
れた電極プレートが挙げられる。なお、一部のみをガス
不透過性とする場合は、高分子材料の含浸時に、一部に
マスキングをして部分的に含浸させるようにすればよ
い。The gas-impermeable carbon plate may be partially gas-impermeable by impregnation with a polymer material. For example, the peripheral portion of the gas or cooling water equivalent to the manifold portion and the peripheral portion of the electrode portion are made partially gas-impermeable by a polymer material, the central electrode portion is kept gas-permeable, and a catalyst layer is formed thereon. Is formed on the electrode plate. In the case where only a part is made gas-impermeable, the part may be masked and partially impregnated when the polymer material is impregnated.
【００２９】前記燃料電池用スタック構成部材は、前記
電極プレートを、固体高分子電解質膜の両側に触媒層が
接触し対向するように配した一式の電池セルになったも
のであってもよい。また、冷却プレートの両面にセパレ
ーターが配され、その両外表面にガスプレートが配さ
れ、さらにその両外表面に前記電極プレートが配され
て、これらが貼り合わされ、芯に冷却層が形成されその
両側が冷却水とガスに分離され、その両側外面にガス溝
が形成され、両側最外面に触媒層が露出した電極を有す
る冷却部付き電極セットであってもよい。The fuel cell stack constituting member may be a set of battery cells in which the electrode plates are arranged so that catalyst layers are in contact with and opposed to both sides of the solid polymer electrolyte membrane. Further, separators are arranged on both surfaces of the cooling plate, gas plates are arranged on both outer surfaces thereof, and the electrode plates are further arranged on both outer surfaces thereof, these are bonded together, and a cooling layer is formed on the core. An electrode set with a cooling unit may be provided in which both sides are separated into cooling water and gas, gas grooves are formed on both outer surfaces, and the catalyst layers are exposed on both outermost surfaces.
【００３０】本発明のガス不透過カーボンプレートを用
いた燃料電池用スタックとしては、前記冷却部付き電極
セットと、固体高分子電解質膜とを所要数繰返して積層
したものであってもよい。また、前記冷却部付きガス−
ガスプレートと、前記電池セルとが積層されたものであ
ってもよい。The fuel cell stack using the gas impermeable carbon plate of the present invention may be a stack in which the electrode set with the cooling section and the solid polymer electrolyte membrane are repeated a required number of times. Further, the gas with the cooling section
A gas plate and the battery cells may be stacked.
【００３１】[0031]
【実施例】以下に、本発明を実施例により更に具体的に
説明するが、本発明はこれらに限定されるものではな
い。EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto.
【００３２】[0032]
【実施例１】２ｍｍ（厚み）×１００ｍｍ×１００ｍｍ
のカーボンプレート（嵩密度；１．８ｇ／ｃｍ3）を、
ビスマレイミドトリアジン樹脂１００重量部に対しにエ
ポキシ樹脂を２０重量部混合してなる高分子材料に浸漬
し、真空炉に導入して減圧超音波含浸（真空度；１０-2
ｔｏｒｒ、真空炉温度；２００℃、周波数；５０ｋＨ
ｚ、出力；１００Ｗ〜１ｋＷ、時間；１５分）により高
分子材料をカーボンプレートに含浸した。次いで、真空
炉を大気圧に戻してカーボンプレートを取り出し、加熱
して、含浸した高分子材料を硬化させた（加熱温度；２
００℃、加熱時間；８時間）。[Example 1] 2 mm (thickness) x 100 mm x 100 mm
Carbon plate (bulk density; 1.8 g / cm 3 )
100 parts by weight of a bismaleimide triazine resin is immersed in a polymer material obtained by mixing 20 parts by weight of an epoxy resin, introduced into a vacuum furnace, and impregnated with reduced pressure ultrasonic waves (degree of vacuum: 10 -2.
Torr, vacuum furnace temperature; 200 ° C, frequency: 50 kHz
z, power: 100 W to 1 kW, time: 15 minutes) to impregnate the polymer material into the carbon plate. Next, the vacuum furnace was returned to atmospheric pressure, the carbon plate was taken out, and heated to cure the impregnated polymer material (heating temperature: 2).
00 ° C, heating time; 8 hours).
【００３３】[0033]
【実施例２】高分子材料としてトリアジン樹脂にエポキ
シ樹脂を２０重量部混合してなる材料を用いた他は、実
施例１と同様のカーボンプレートを用い、実施例１と同
じ条件で減圧超音波含浸及び加熱硬化を行った。Example 2 The same carbon plate as in Example 1 was used except that a material obtained by mixing 20 parts by weight of an epoxy resin with a triazine resin was used as a polymer material. Impregnation and heat curing were performed.
【００３４】上記実施例１〜２で得られた２種類の燃料
電池用ガス不透過カーボンプレートは、素材であるカー
ボンにビスマレイミドトリアジン樹脂化合物、トリアジ
ン樹脂化合物が微小孔まで含浸されて硬化されるので、
隙間が生ぜず、またエポキシ樹脂が入っているため柔軟
性があり機械的強度も上がり、まったく隙間がなく、ガ
ス圧を３ｋｇｆ／ｃｍ2まであげてもガスリークはなか
った。また、リークデテクターで測定したところ、１．
０×１０-11（pa・m3／sec）以下だった。実際に燃料電
池スタックにしようしたところ、酸素や水素のガスのリ
ークが発生することはなかった。The two types of gas-impermeable carbon plates for fuel cells obtained in Examples 1 and 2 are cured by impregnating carbon as a material with a bismaleimide triazine resin compound and a triazine resin compound up to micropores. So
There were no gaps, and the epoxy resin contained the resin, which provided flexibility and increased mechanical strength. There were no gaps, and there was no gas leak even when the gas pressure was increased to 3 kgf / cm 2 . When measured with a leak detector,
It was less than 0 × 10 −11 (pa · m 3 / sec). When the fuel cell stack was actually used, no leak of oxygen or hydrogen gas occurred.
【００３５】また、上記実施例は、カーボンプレート全
体に高分子材料が含浸され、全体がガス不透過性となっ
ているが、カーボンプレートの一部にマスキングをして
部分的に高分子材料を含浸させ、所定の部分のみガス不
透過性としたものでも同様に効果があった。In the above embodiment, the entire carbon plate is impregnated with the polymer material, and the entire carbon plate is gas-impermeable. However, the polymer material is partially masked by partially masking the carbon plate. The same effect was obtained even when impregnation was performed to make only a predetermined portion gas impermeable.
【００３６】[0036]
【発明の効果】以上の結果からわかるように、本発明の
燃料電池用ガス不透過カーボンプレートは、高分子材料
を減圧超音波含浸法により超音波で樹脂間に振動させて
含浸させているので、微小孔にまで、短時間で十分に高
分子材料が含浸され、カーボンとの間に隙間が生じにく
く、燃料電池にした際ガス圧力を上げてもガスがリーク
することがない。また、素材に嵩密度１〜３ｇ／ｃｍ3
のカーボンを用いると、安価であり、機械加工性がよ
く、さらにガスリークが生じにくい。また、上記カーボ
ンプレートに含浸させる高分子材料にエポキシ樹脂を配
合することにより、カーボンとの密着性がよく、また縮
むこともなく、隙間が生じにくくなるので、ガスリーク
がさらに防止される。さらに、従来のようにカーボンに
フェノール樹脂などを含浸し、窒素雰囲気で高温焼成に
より得られる気密性をもったカーボンのような高価なも
のを使う必要もなく、燃料電池スタック自体が薄型、軽
量、高出力、低価格になり、環境にやさしいエネルギー
を作ることができ、本発明の工業的価値は大きい。As can be seen from the above results, the gas impermeable carbon plate for a fuel cell according to the present invention is impregnated with a polymer material by vibrating between resins by ultrasonic waves under reduced pressure ultrasonic impregnation. In addition, the polymer material is sufficiently impregnated into the micropores in a short time, a gap is hardly formed between the polymer material and the carbon, and gas does not leak even when the gas pressure is increased when the fuel cell is used. In addition, the material has a bulk density of 1 to 3 g / cm 3
When carbon is used, it is inexpensive, has good machinability, and hardly causes gas leak. In addition, by blending an epoxy resin with the polymer material impregnated in the carbon plate, the adhesion to carbon is good, the resin does not shrink, and a gap is less likely to be formed, so that gas leakage is further prevented. Furthermore, it is not necessary to impregnate carbon with a phenol resin or the like as in the past and use expensive materials such as airtight carbon obtained by firing at high temperature in a nitrogen atmosphere, and the fuel cell stack itself is thin, lightweight, High power, low cost, and environmentally friendly energy can be produced, and the industrial value of the present invention is great.
Claims (4)
ンプレートに高分子材料を減圧超音波含浸・硬化し、そ
の全部又は一部をガス不透過性とした、燃料電池用ガス
不透過カーボンプレート。1. A gas-impermeable carbon plate for a fuel cell, wherein a gas-permeable carbon plate processed into a predetermined shape is impregnated with a polymer material under reduced pressure ultrasonic wave and cured to make all or a part of the gas impermeable. .
度が１〜３ｇ／ｃｍ3であることを特徴とする、請求項
１記載の燃料電池用ガス不透過カーボンプレート。2. The gas impermeable carbon plate for a fuel cell according to claim 1, wherein the gas permeable carbon plate has a bulk density of 1 to 3 g / cm 3 .
アジン樹脂化合物、ビスマレイミドトリアジン樹脂化合
物、ポリイミド樹脂、及びアクリル樹脂からなる群から
選択される樹脂材料である、請求項１又は２記載の燃料
電池用ガス不透過カーボンプレート。3. The fuel according to claim 1, wherein the polymer material is a resin material selected from the group consisting of an epoxy resin, a triazine resin compound, a bismaleimide triazine resin compound, a polyimide resin, and an acrylic resin. Gas impermeable carbon plate for batteries.
リアジン樹脂化合物、ビスマレイミドトリアジン樹脂化
合物、ポリイミド樹脂、及びアクリル樹脂からなる群か
ら選択される樹脂材料との樹脂混合物である、請求項１
〜３のいずれかに記載の燃料電池用ガス不透過カーボン
プレート。4. The resin material according to claim 1, wherein the polymer material is a resin mixture of an epoxy resin and a resin material selected from the group consisting of a triazine resin compound, a bismaleimide triazine resin compound, a polyimide resin, and an acrylic resin.
4. The gas-impermeable carbon plate for a fuel cell according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26147499A JP4253083B2 (en) | 1999-09-16 | 1999-09-16 | Gas-impermeable carbon plate for fuel cells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26147499A JP4253083B2 (en) | 1999-09-16 | 1999-09-16 | Gas-impermeable carbon plate for fuel cells |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001085031A true JP2001085031A (en) | 2001-03-30 |
| JP4253083B2 JP4253083B2 (en) | 2009-04-08 |
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ID=17362415
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26147499A Expired - Fee Related JP4253083B2 (en) | 1999-09-16 | 1999-09-16 | Gas-impermeable carbon plate for fuel cells |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002352812A (en) * | 2001-05-25 | 2002-12-06 | Mitsubishi Chemicals Corp | Separator for fuel cell and solid polymer fuel cell using it |
| JP2007508043A (en) * | 2003-10-08 | 2007-04-05 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Improved ultrasonic volume imaging apparatus and method by a combination of acoustic sampling resolution, volume line density and volume imaging rate |
| CN108666594A (en) * | 2018-04-03 | 2018-10-16 | 华东师范大学 | A kind of bipolar plates manufacture craft |
-
1999
- 1999-09-16 JP JP26147499A patent/JP4253083B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002352812A (en) * | 2001-05-25 | 2002-12-06 | Mitsubishi Chemicals Corp | Separator for fuel cell and solid polymer fuel cell using it |
| JP2007508043A (en) * | 2003-10-08 | 2007-04-05 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Improved ultrasonic volume imaging apparatus and method by a combination of acoustic sampling resolution, volume line density and volume imaging rate |
| CN108666594A (en) * | 2018-04-03 | 2018-10-16 | 华东师范大学 | A kind of bipolar plates manufacture craft |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4253083B2 (en) | 2009-04-08 |
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