JPH08287924A - Solid high polymer fuel cell - Google Patents
Solid high polymer fuel cellInfo
- Publication number
- JPH08287924A JPH08287924A JP7082234A JP8223495A JPH08287924A JP H08287924 A JPH08287924 A JP H08287924A JP 7082234 A JP7082234 A JP 7082234A JP 8223495 A JP8223495 A JP 8223495A JP H08287924 A JPH08287924 A JP H08287924A
- Authority
- JP
- Japan
- Prior art keywords
- fuel cell
- unit cell
- polymer electrolyte
- high polymer
- water
- 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
-
- 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]
【産業上の利用分野】本発明は、燃料として純水素、ま
たはメタノール及び化石燃料からの改質水素などの還元
剤を用い、空気や酸素を酸化剤とする燃料電池に関する
ものであり、特に固体高分子型燃料電池の配流板に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel cell using pure hydrogen as a fuel or a reducing agent such as reformed hydrogen from methanol and fossil fuel and using air or oxygen as an oxidant, and particularly to a solid-state fuel cell The present invention relates to a distribution plate of a polymer fuel cell.
【０００２】[0002]
【従来の技術】固体高分子型燃料電池は電解質にイオン
交換膜を用い、常温・常圧で１Ａ／ｃｍ2以上の高出力
が得られる。水素を燃料とした場合、負極では以下のよ
うな反応が起こる。2. Description of the Related Art A polymer electrolyte fuel cell uses an ion exchange membrane as an electrolyte and can obtain a high output of 1 A / cm 2 or more at room temperature and atmospheric pressure. When hydrogen is used as a fuel, the following reactions occur at the negative electrode.
【０００３】[0003]
【化１】 Embedded image
【０００４】酸素を酸化剤とした場合、正極ではWhen oxygen is used as an oxidant,
【０００５】[0005]
【化２】 Embedded image
【０００６】の反応が起こり、水が生成される。固体高
分子型燃料電池では、電解質であるイオン交換膜が含水
状態でないとイオン伝導性を示さないため、反応ガスは
セル温度よりも高い温度で加湿する必要がある。その結
果、水蒸気によって反応ガスの濃度が低下し、高出力を
可能にするためには電極ならびに電極触媒層内部の反応
サイトへの多量のガス供給、すなわちガス供給能の向上
が必要となる。The reaction (1) occurs and water is produced. In the polymer electrolyte fuel cell, the ion exchange membrane, which is the electrolyte, does not exhibit ionic conductivity unless it is in a water-containing state, so the reaction gas must be humidified at a temperature higher than the cell temperature. As a result, the concentration of the reaction gas is reduced by the water vapor, and in order to enable high output, it is necessary to supply a large amount of gas to the reaction site inside the electrode and the electrode catalyst layer, that is, to improve the gas supply ability.
【０００７】このうち電極へのガス供給能を向上させる
ためには、電池の構造材料である配流板が重要となる。
配流板は集電体であると同時に、電極平面に対して反応
ガスを均一に供給し、かつ余剰の加湿水と生成水を速や
かに排出する機能を有さなければならない。そのため配
流板は撥水性および導電性を有する多孔質の材料である
ことが望ましいが積層電池の構造を簡易にするために、
例えば特開平５−２５１０９７号公報では図２に示すよ
うなカーボンまたはチタンなどの金属からなるリブ付き
セパレータ９によって電極２及び３側にガス流路溝１０
を設けている。一方、特開平６−１６８７２８号公報で
は、片面にリブを有する多孔質炭素板の平面側を触媒層
と接してガス拡散層を兼ねた配流板としている。また固
体高分子型燃料電池と類似の電極を用いるリン酸型燃料
電池において、特公昭６３−２２４２１号公報では無孔
質のカーボン基板の表面にカーボンペーパーを基材とす
る多孔質帯状片を所定間隔を存して配列させたセパレー
タを用いている。さらに特開平６−２３１７７３号公報
ではセパレータの電極側の表面に多孔性の導電材によっ
て、ガス流路溝を形成させている。Among them, in order to improve the gas supply ability to the electrodes, the distribution plate which is a structural material of the battery is important.
The flow distribution plate must be a collector and at the same time have a function of uniformly supplying the reaction gas to the flat surface of the electrode and promptly discharging excess humidifying water and generated water. Therefore, the flow distribution plate is preferably a porous material having water repellency and conductivity, but in order to simplify the structure of the laminated battery,
For example, in JP-A-5-251097, a gas passage groove 10 is provided on the electrodes 2 and 3 side by a ribbed separator 9 made of a metal such as carbon or titanium as shown in FIG.
Is provided. On the other hand, in Japanese Unexamined Patent Publication No. 6-168728, a flow distribution plate which also serves as a gas diffusion layer is formed by contacting the flat surface side of a porous carbon plate having a rib on one side with a catalyst layer. Further, in a phosphoric acid fuel cell using an electrode similar to that of a solid polymer fuel cell, Japanese Patent Publication No. 63-22421 discloses that a porous strip having carbon paper as a base material is provided on the surface of a nonporous carbon substrate. It uses separators arranged at intervals. Further, in Japanese Patent Laid-Open No. 6-231773, a gas flow channel groove is formed by a porous conductive material on the surface of the separator on the electrode side.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら上記従来
のリブ付きセパレータ９を用いる方法では、セパレータ
がガス不透性であるため電極２または３の集電部のリブ
と接する部分にガスが供給されにくく、電極へのガスの
供給が不均一になるという欠点を有していた。またリン
酸型燃料電池の構造として一般的に知られているガス拡
散層を兼ねたリブ付き多孔質炭素板を用いると、リブ付
きセパレータと比較して集電部へも反応ガスが供給され
る。しかしカーボンペーパーをガス拡散層に用いた場合
と比較して、強度上ガス拡散層の厚みを大きくするため
ガス拡散層のガス透過能が低いという欠点を有してい
た。またセパレータに多孔質材料によるリブを設けると
電極へのガス供給は同様に均一化される。しかし、特公
昭６３−２２４２１号公報では撥水処理した多孔質カー
ボンペーパーを数枚積み重ねて接着したものをスリッタ
ーによって切断、また特開平６−２３１７７３号公報で
は多孔質構造を設けるためにスパッタリングや粉末の焼
結を行うなど複雑な工程を要していた。さらに、特開平
６−２３１７７３号公報ではガス流路溝を形成する多孔
質材料が撥水性を有しないため水による目詰まりが起こ
り、ガス供給能が低下するという欠点を有していた。However, in the conventional method using the ribbed separator 9 described above, since the separator is gas impermeable, it is difficult to supply gas to the portion of the electrode 2 or 3 that contacts the rib of the current collecting portion. However, it has a drawback that the gas supply to the electrodes becomes non-uniform. When a ribbed porous carbon plate that also serves as a gas diffusion layer, which is generally known as a structure of a phosphoric acid fuel cell, is used, the reaction gas is also supplied to the current collector as compared with a ribbed separator. . However, compared with the case where carbon paper is used for the gas diffusion layer, the gas diffusion layer has a drawback that the gas diffusion layer has a low gas permeability because the thickness of the gas diffusion layer is increased in terms of strength. If the separator is provided with ribs made of a porous material, the gas supply to the electrodes is similarly made uniform. However, in Japanese Patent Publication No. Sho 63-22421, several sheets of water-repellent porous carbon paper which are stacked and adhered are cut by a slitter, and in Japanese Patent Laid-Open No. 6-231773, sputtering or powder is used to provide a porous structure. A complicated process such as sintering was required. Further, in JP-A-6-231773, since the porous material forming the gas flow channel has no water repellency, it has a drawback that it is clogged with water and the gas supply ability is lowered.
【０００９】本発明は上記従来の課題を解決するもの
で、高い撥水性を有し、複雑な加工を要さないリブ付き
多孔質炭素板を配流板に用いることにより、より高性能
で経済性の高い固体高分子型燃料電池を提供することを
目的とする。The present invention solves the above-mentioned problems of the prior art. By using a ribbed porous carbon plate having high water repellency and requiring no complicated processing as a distribution plate, higher performance and economic efficiency are achieved. It is an object of the present invention to provide a high polymer electrolyte fuel cell.
【００１０】[0010]
【課題を解決するための手段】この目的を達成するため
に、固体高分子電解質膜と、この固体高分子電解質膜の
両面に正極および負極を配置した単位セルと、上記単位
セルの両側に配置された一対の配流板と、上記配流板の
外側にセパレータとを有する燃料電池において、少なく
とも一方の配流板が、単位セルと接する面にリブを有し
かつフッ素樹脂で撥水処理されたポリアクリロニトリル
系炭素繊維（以下ＰＡＮ系炭素繊維とする）からなる多
孔質炭素板からなる構成とした。また、上記配流板のフ
ッ素樹脂添加率が１０〜６０重量％である多孔質炭素板
からなる構成とした。さらに上記配流板の空隙率が３０
〜７０％である多孔質炭素板からなる構成とした。To achieve this object, a solid polymer electrolyte membrane, a unit cell in which a positive electrode and a negative electrode are arranged on both sides of the solid polymer electrolyte membrane, and a unit cell arranged on both sides of the unit cell In a fuel cell having a pair of flow distribution plates and a separator outside the flow distribution plate, at least one of the flow distribution plates has a rib on the surface in contact with the unit cell and is polyacrylonitrile treated with a water-repellent fluorocarbon resin. A porous carbon plate made of carbon fiber (hereinafter referred to as PAN carbon fiber) was used. Further, the flow distribution plate is made of a porous carbon plate having a fluororesin addition rate of 10 to 60% by weight. Furthermore, the porosity of the distribution plate is 30.
It was made up of a porous carbon plate of 70% to 70%.
【００１１】[0011]
【作用】この構成では、過剰の加湿水および生成水によ
る目詰まりがなく、電極への均一でかつ高いガス供給能
を実現して高出力な燃料電池を提供することができる。
さらに配流板が複雑な加工を要さない固体高分子型燃料
電池を提供できる。With this configuration, it is possible to provide a high-output fuel cell that does not cause clogging due to excess humidifying water and generated water, realizes uniform and high gas supply ability to the electrodes.
Further, it is possible to provide a polymer electrolyte fuel cell in which the distribution plate does not require complicated processing.
【００１２】[0012]
【実施例】以下、本発明の実施例について、図面を参照
しながら説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１３】（実施例１）図１は本発明の実施例の単電
池の断面図を示したものである。固体高分子電解質膜で
あるイオン交換膜（米国Ｄｕ Ｐｏｎｔ社製、Ｎａｆｉ
ｏｎ１１７）１の両側に正極２及び負極３を接合した単
位セル４の外側に４フッ化エチレン６フッ化プロピレン
の共重合体（以下ＦＥＰとする）を２５ｗｔ％添加する
ことによって撥水処理を行ったＰＡＮ系炭素繊維からな
るリブ付き多孔質炭素板からである配流板８を配置し、
ガス不透性のガラス状カーボンからなるセパレータ５で
挟み込んで単電池Ａを作製した。この単電池Ａの放電試
験を、燃料に水素、酸化剤に酸素を用いて大気圧、セル
温度５０℃で行った。(Embodiment 1) FIG. 1 is a sectional view of a unit cell according to an embodiment of the present invention. Ion exchange membrane, which is a solid polymer electrolyte membrane (manufactured by Du Pont, USA, Nafi
on 117) Water repellent treatment is performed by adding 25 wt% of a copolymer of tetrafluoroethylene hexafluoropropylene (hereinafter referred to as FEP) to the outside of the unit cell 4 in which the positive electrode 2 and the negative electrode 3 are joined to both sides of A distribution plate 8 made of a porous carbon plate with ribs made of PAN-based carbon fiber,
A unit cell A was produced by sandwiching the separator 5 made of gas-impermeable glassy carbon. The discharge test of the unit cell A was performed at a atmospheric pressure and a cell temperature of 50 ° C. using hydrogen as a fuel and oxygen as an oxidant.
【００１４】（実施例２）配流板に実施例１と同様の配
流板を８０℃の水中に１００日間浸漬したものを用いた
以外は実施例１と全く同じであり、これを単電池Ａ′と
し、実施例１と同様の放電試験を行った。(Example 2) This is exactly the same as Example 1 except that the same distribution plate as in Example 1 was immersed in water at 80 ° C for 100 days. Then, the same discharge test as in Example 1 was performed.
【００１５】（比較例１）図２は本発明の比較例の単電
池の断面図を示したものである。配流板とセパレータに
ガス不透性のガラス状カーボンからなるリブ付きセパレ
ータ９を用いた以外は実施例１と全く同じであり、これ
を単電池Ｂとし、実施例１と同様の放電試験を行った。(Comparative Example 1) FIG. 2 is a sectional view of a unit cell of a comparative example of the present invention. Except that the separator 9 with ribs made of gas-impermeable glassy carbon was used for the flow distribution plate and the separator, this was exactly the same as Example 1, and this was used as the unit cell B, and the same discharge test as in Example 1 was performed. It was
【００１６】（比較例２）配流板に撥水処理を行わない
リブ付き多孔質板を用いた以外は実施例１と全く同じで
あり、これを単電池Ｃとし、実施例１と同様の放電試験
を行った。(Comparative Example 2) The same operation as in Example 1 was carried out except that the porous plate with ribs which was not subjected to the water repellent treatment was used for the distribution plate, and this was used as a single cell C, and the same discharge as in Example 1 was performed. The test was conducted.
【００１７】（比較例３）配流板に撥水処理を行ったピ
ッチ系リブ付き多孔質板を用いた以外は実施例１と全く
同じであり、これを単電池Ｄとし、実施例１と同様の放
電試験を行った。(Comparative Example 3) Except for using a water-repellent-treated pitch-based ribbed porous plate for the distribution plate, this is exactly the same as Example 1, and this was used as unit cell D and was the same as Example 1. Discharge test was performed.
【００１８】（比較例４）配流板に撥水処理を行ったセ
ルロース系リブ付き多孔質板を用いた以外は実施例１と
全く同じであり、これを単電池Ｅとし、実施例１と同様
の放電試験を行った。(Comparative Example 4) The same as Example 1 except that a water-repellent treated porous plate with cellulose ribs was used for the distribution plate, which was used as a unit cell E and was similar to Example 1. Discharge test was performed.
【００１９】（比較例５）配流板に比較例３と同様の配
流板を８０℃の水中に１００日間浸漬したものを用いた
以外は実施例１と全く同じであり、これを単電池Ｄ′と
し、実施例１と同様の放電試験を行った。(Comparative Example 5) This is exactly the same as Example 1 except that the same distribution plate as Comparative Example 3 was immersed in water at 80 ° C for 100 days. Then, the same discharge test as in Example 1 was performed.
【００２０】（比較例６）配流板に比較例４と同様の配
流板を８０℃の水中に１００日間浸漬したものを用いた
以外は比較例４と全く同じであり、これを単電池Ｅ′と
し、実施例１と同様の放電試験を行った。(Comparative Example 6) This is exactly the same as Comparative Example 4 except that the same distribution plate as Comparative Example 4 was immersed in water at 80 ° C for 100 days, and this was used as a unit cell E '. Then, the same discharge test as in Example 1 was performed.
【００２１】図３に本発明の実施例の単電池Ａ及び比較
例の単電池Ｂ及びＣの電流−電圧曲線を示した。１．０
Ａ／ｃｍ2における電池電圧が比較例の電池Ｂ及びＣが
０．４４Ｖ及び０Ｖであるのに対し、本実施例の電池Ａ
は０．５５Ｖと高い値を示した。さらに限界電流密度は
比較例の電池Ｂ及びＣが１．２Ａ／ｃｍ2及び１．０Ａ
／ｃｍ2であるのに対し、本発明の実施例の単電池Ａは
１．５Ａ／ｃｍ2と大きい値を示した。なお比較例の単
電池Ｄ及びＥは実施例の単電池Ａと同等の特性を示し
た。FIG. 3 shows current-voltage curves of the unit cell A of the example of the present invention and the unit cells B and C of the comparative example. 1.0
The battery voltage at A / cm 2 is 0.44 V and 0 V for the batteries B and C of the comparative example, whereas the battery A of the present example is
Showed a high value of 0.55V. Furthermore, the limiting current densities were 1.2 A / cm 2 and 1.0 A for the batteries B and C of the comparative example.
/ Cm 2 , whereas the unit cell A of the example of the present invention showed a large value of 1.5 A / cm 2 . Note that the unit cells D and E of the comparative example exhibited the same characteristics as the unit cell A of the example.
【００２２】本実施例の単電池Ａは配流板が多孔質であ
るため、電極のリブと接する部分にもガス供給が行われ
る。その結果比較例の単電池Ｂと比較して電極に均一に
反応ガスを供給できたため、より優れた分極特性を示し
たといえる。In the unit cell A of this embodiment, since the flow distribution plate is porous, gas is also supplied to the portion in contact with the rib of the electrode. As a result, the reaction gas could be supplied uniformly to the electrodes as compared with the unit cell B of the comparative example, and therefore it can be said that the polarization characteristics were more excellent.
【００２３】また本実施例の単電池Ａに用いた多孔質炭
素板の空隙率は４２％であるのに対し、比較例の単電池
Ｃに用いた多孔質炭素板の空隙率は８０％であった。本
実施例の単電池Ａの多孔質炭素板が比較例の電池Ｃより
も空隙率が小さくなったのは撥水処理を行ったためであ
る。しかし単電池Ａの方が優れた分極特性を示したの
は、撥水処理によって多孔質炭素板の細孔が過剰な加湿
水及び生成水による目詰まりが起こりにくくなり、反応
ガスの供給がより円滑に行われたためである。The porosity of the porous carbon plate used in the unit cell A of this example was 42%, while the porosity of the porous carbon plate used in the unit cell C of the comparative example was 80%. there were. The porosity of the porous carbon plate of the single battery A of this example was smaller than that of the battery C of the comparative example because the water repellent treatment was performed. However, the unit cell A exhibited superior polarization characteristics because the water-repellent treatment makes it difficult for the pores of the porous carbon plate to be clogged with excessive humidifying water and generated water, and the reaction gas is supplied more efficiently. It was done smoothly.
【００２４】また、本実施例の単電池Ａ、比較例の単電
池Ｂ及びＣの内部抵抗はそれぞれ、８ｍΩ、９ｍΩ及び
８．２ｍΩとほぼ同じ値を示し、撥水処理による内部抵
抗の増大は見られなかった。Further, the internal resistances of the unit cell A of this example and the unit cells B and C of the comparative example are almost the same values of 8 mΩ, 9 mΩ and 8.2 mΩ, respectively, and the internal resistance increases due to the water repellent treatment. I couldn't see it.
【００２５】図４に本実施例の単電池Ａ′と比較例の単
電池Ｄ′及びＥ′の電流−電圧曲線を示した。１．０Ａ
／ｃｍ2における電池電圧が比較例の電池Ｄ′及びＥ′
が０．２８Ｖ及び０．３９５Ｖで、限界電流密度はそれ
ぞれ１．１Ａ／ｃｍ2及び１．２Ａ／ｃｍ2と初期の単電
池Ｄ及びＣと比較して劣化した。これに対し、本実施例
の電池Ａは１．０Ａ／ｃｍ2における電池電圧が０．５
４５Ｖで、限界電流密度は１．４５Ａ／ｃｍ2と初期の
単電池Ａとほぼ同程度の特性を示した。FIG. 4 shows the current-voltage curves of the unit cell A'of this embodiment and the unit cells D'and E'of the comparative examples. 1.0A
The battery voltage at / cm 2 is the battery of Comparative Examples D'and E '
Was 0.28 V and 0.395 V, the limiting current densities were 1.1 A / cm 2 and 1.2 A / cm 2 , respectively, which were deteriorated as compared with the initial cells D and C. On the other hand, the battery A of this example has a battery voltage of 0.5 at 1.0 A / cm 2 .
At 45 V, the limiting current density was 1.45 A / cm 2, which was about the same level as the initial unit cell A.
【００２６】限界電流密度が小さくなったことから、比
較例の電池Ｄ′及びＥ′に用いた配流板は撥水性が低下
したためにガス供給能が低下し、特性が劣化したと考え
られる。一方、単電池Ａ′に用いた配流板は撥水性が保
たれたため、初期の特性が維持されたといえる。Since the limiting current density became small, it is considered that the flow distribution plates used in the batteries D'and E'of the comparative example had deteriorated water repellency and hence gas supply ability and deteriorated characteristics. On the other hand, it can be said that the flow distribution plate used for the unit cell A ′ retained the water repellency and thus maintained the initial characteristics.
【００２７】なお本実施例では撥水材としてＦＥＰを用
いたが、他のフッ素樹脂、例えばポリテトラフルオロエ
チレン、パーフルオロアルキルビニルエーテルなど撥水
性を有するフッ素樹脂であれば同様の効果が得られた。
さらに本実施例ではフッ素樹脂の添加率を２５重量％と
したが、１０〜６０重量％で同様の効果が得られた。ま
た本実施例では空隙率が４２％の多孔質炭素板を用いた
が、空隙率が３０〜７０％のものでは同様の効果が得ら
れた。Although FEP was used as the water repellent material in this embodiment, the same effect can be obtained with other fluororesins such as polytetrafluoroethylene and perfluoroalkyl vinyl ether. .
Further, in this example, the addition rate of the fluororesin was set to 25% by weight, but the same effect was obtained at 10 to 60% by weight. Further, in this example, a porous carbon plate having a porosity of 42% was used, but the same effect was obtained when the porosity was 30 to 70%.
【００２８】さらに本実施例では燃料電池の一例として
電解質として固体高分子電解質膜を用いた水素−酸素燃
料電池を取り上げたが、メタノール、天然ガス、ナフサ
などを燃料とする改質水素を用いた固体高分子型燃料電
池、又は酸化剤として空気を用いた固体高分子型燃料電
池に適用することも可能である。Further, in this example, a hydrogen-oxygen fuel cell using a solid polymer electrolyte membrane as an electrolyte was taken up as an example of a fuel cell, but reformed hydrogen using methanol, natural gas, naphtha, etc. as a fuel was used. It is also possible to apply to a polymer electrolyte fuel cell or a polymer electrolyte fuel cell using air as an oxidant.
【００２９】[0029]
【発明の効果】以上のように本発明は、固体高分子型燃
料電池において配流板に撥水処理したポリアクリロニト
リル系炭素繊維からなるリブ付き多孔質炭素板を用いる
ことによって生成水による目詰まりがなく電極への均一
でかつ高いガス供給能を実現し、高出力な固体高分子型
燃料電池を提供することができる。さらに配流板が複雑
な加工を要さない固体高分子型燃料電池を提供できる。INDUSTRIAL APPLICABILITY As described above, the present invention uses a ribbed porous carbon plate made of water-repellent polyacrylonitrile-based carbon fiber for a distribution plate in a polymer electrolyte fuel cell to prevent clogging by generated water. It is possible to provide a high output solid polymer fuel cell, which realizes a uniform and high gas supply ability to the electrode without using the fuel cell. Further, it is possible to provide a polymer electrolyte fuel cell in which the distribution plate does not require complicated processing.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の実施例の単電池Ａの断面図FIG. 1 is a sectional view of a unit cell A according to an embodiment of the present invention.
【図２】本発明の比較例の単電池Ｂの断面図FIG. 2 is a sectional view of a unit cell B of a comparative example of the present invention.
【図３】本発明の実施例の単電池Ａ、比較例の単電池Ｂ
及びＣの電流−電圧曲線を示す図FIG. 3 is a cell A of an example of the present invention and a cell B of a comparative example.
And C showing current-voltage curves
【図４】本発明の実施例の単電池Ａ′、比較例の単電池
Ｄ′及びＥ′の電流−電圧曲線を示す図FIG. 4 is a diagram showing current-voltage curves of a unit cell A ′ of an example of the present invention and unit cells D ′ and E ′ of a comparative example.
１ 固体高分子電解質膜 ２ 正極 ３ 負極 ４ 単位セル ５ セパレータ ７ ガスケット ８ リブ付き多孔質炭素板（撥水処理有り）である配流
板 ９ リブ付きセパレータ １０ 流路溝1 Solid Polymer Electrolyte Membrane 2 Positive Electrode 3 Negative Electrode 4 Unit Cell 5 Separator 7 Gasket 8 Distribution Plate that is a Porous Carbon Plate with Ribs (with Water Repellent Treatment) 9 Separator with Ribs 10 Channel Grooves
Claims (3)
極を配置した単位セルと、上記単位セルに接して両側に
配置した配流板と、上記配流板に接して両側に配置した
セパレータとを有する固体高分子型燃料電池において、
配流板の少なくとも一方が単位セルに接する面にリブを
有し、かつフッ素樹脂で撥水処理されたポリアクリロニ
トリル系炭素繊維からなる多孔質炭素板であることを特
徴とする固体高分子型燃料電池。1. A unit cell in which a positive electrode and a negative electrode are arranged on both sides of a solid polymer electrolyte membrane, a distribution plate arranged on both sides in contact with the unit cell, and a separator arranged on both sides in contact with the distribution plate. In the polymer electrolyte fuel cell having
A polymer electrolyte fuel cell, characterized in that at least one of the flow distribution plates has a rib on the surface in contact with the unit cell, and is a porous carbon plate made of polyacrylonitrile-based carbon fiber which is water-repellent treated with a fluororesin. .
０〜６０重量％である請求項１記載の固体高分子型燃料
電池。2. A fluororesin addition rate of the porous carbon plate is 1
The polymer electrolyte fuel cell according to claim 1, which is 0 to 60% by weight.
である請求項１記載の固体高分子型燃料電池。3. The porosity of the porous carbon plate is 30 to 70%.
The polymer electrolyte fuel cell according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7082234A JPH08287924A (en) | 1995-04-07 | 1995-04-07 | Solid high polymer fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7082234A JPH08287924A (en) | 1995-04-07 | 1995-04-07 | Solid high polymer fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08287924A true JPH08287924A (en) | 1996-11-01 |
Family
ID=13768725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7082234A Pending JPH08287924A (en) | 1995-04-07 | 1995-04-07 | Solid high polymer fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08287924A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000215902A (en) * | 1999-01-27 | 2000-08-04 | Toyota Motor Corp | Gas separator for fuel cell, fuel cell and manufacture of gas separator for fuel cell |
| WO2002047190A1 (en) * | 2000-12-05 | 2002-06-13 | Matsushita Electric Industrial Co., Ltd. | Polyelectrolyte type fuel cell, and operation method therefor |
| KR20020076653A (en) * | 2001-03-29 | 2002-10-11 | 홍병선 | A PEMFC(Proton Exchange Membrane Fuel Cells) having efficient water-balance properties |
-
1995
- 1995-04-07 JP JP7082234A patent/JPH08287924A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000215902A (en) * | 1999-01-27 | 2000-08-04 | Toyota Motor Corp | Gas separator for fuel cell, fuel cell and manufacture of gas separator for fuel cell |
| WO2002047190A1 (en) * | 2000-12-05 | 2002-06-13 | Matsushita Electric Industrial Co., Ltd. | Polyelectrolyte type fuel cell, and operation method therefor |
| EP1349224A1 (en) * | 2000-12-05 | 2003-10-01 | Matsushita Electric Industrial Co., Ltd. | Polyelectrolyte type fuel cell, and operation method therefor |
| CN1293661C (en) * | 2000-12-05 | 2007-01-03 | 松下电器产业株式会社 | Polyelectrolyte type fuel cell and operation method therefor |
| EP1349224A4 (en) * | 2000-12-05 | 2007-05-16 | Matsushita Electric Ind Co Ltd | Polyelectrolyte type fuel cell, and operation method therefor |
| KR20020076653A (en) * | 2001-03-29 | 2002-10-11 | 홍병선 | A PEMFC(Proton Exchange Membrane Fuel Cells) having efficient water-balance properties |
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