JP3086854B1 - Gas diffusion electrode integrated with gas chamber - Google Patents
Gas diffusion electrode integrated with gas chamberInfo
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- JP3086854B1 JP3086854B1 JP11074132A JP7413299A JP3086854B1 JP 3086854 B1 JP3086854 B1 JP 3086854B1 JP 11074132 A JP11074132 A JP 11074132A JP 7413299 A JP7413299 A JP 7413299A JP 3086854 B1 JP3086854 B1 JP 3086854B1
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- gas
- diffusion electrode
- gas diffusion
- metal plate
- chamber
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Abstract
【要約】
【課題】 ガス拡散電極の背面から直接集電でき、しか
もガス拡散電極の背面を多数の個所で固定できるように
し、かつ酸素が電極に十分拡散することができるガス通
路が設けられ、集電が短距離で行えて電圧損が小さく、
液圧とガス圧に差が生じても変形することがなく、破壊
しないガス拡散電極を提供する。
【解決手段】 ガス拡散電極のガス供給層側に多数の凹
凸状溝付き金属板の銀材が存在する凸面を当接させ、ホ
ットプレスにより前記溝付き金属板の凸面に存在する銀
材部分と前記ガス拡散電極を接合し、前記金属板の凹溝
部をガス通路として構成したことを特徴とするガス室一
体型ガス拡散電極。前記接合が温度２００〜４００℃、
圧力２０ｋｇ／ｃｍ2 以上のホットプレス条件により行
われることが好ましい。A gas passage through which current can be directly collected from the back surface of a gas diffusion electrode, the back surface of the gas diffusion electrode can be fixed at a number of locations, and oxygen can be sufficiently diffused into the electrode is provided. Current collection can be performed over a short distance, voltage loss is small,
Provided is a gas diffusion electrode that is not deformed even when a difference occurs between a liquid pressure and a gas pressure and does not break. SOLUTION: A convex surface of a metal plate having a large number of concave and convex grooves is provided in contact with a gas supply layer side of a gas diffusion electrode, and hot pressing is performed on the convex surface of the metal plate having a groove. A gas diffusion electrode integrated with a gas chamber, wherein the gas diffusion electrodes are joined, and a concave groove of the metal plate is configured as a gas passage. The bonding is performed at a temperature of 200 to 400 ° C.
It is preferable that the hot pressing is performed under a pressure of 20 kg / cm 2 or more.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、アルカリ型燃料電
池、イオン交換膜型食塩電解槽に用いられるガス室一体
型ガス拡散電極に関する。The present invention relates to a gas diffusion electrode integrated with a gas chamber used in an alkaline fuel cell and an ion exchange membrane type salt cell.
【０００２】[0002]
【従来の技術】ガス拡散電極の機能の概要をイオン交換
膜法で食塩水溶液を電解する場合に陰極に使用する酸素
陰極を例として説明する。通常イオン交換膜法食塩電解
は、陽イオン交換膜で電解槽を陽極室と陰極室とに区画
し、陽極を有する陽極室には塩化ナトリウム水溶液を入
れて電解する。このイオン交換膜法食塩電解槽の一種
に、陰極として酸素を含有するガスを供給するガス拡散
電極、すなわち酸素陰極を用いるものがあり、この種の
電解槽では、電解槽の陰極室は、ガス室を備えそこから
陰極に酸素含有ガスを供給するように構成されたガス拡
散電極と苛性ソーダ水溶液を入れた電解液室（苛性室）
とからなっている。2. Description of the Related Art An outline of the function of a gas diffusion electrode will be described with reference to an oxygen cathode used as a cathode when a saline solution is electrolyzed by an ion exchange membrane method. Normally, in the salt electrolysis using an ion exchange membrane method, an electrolytic cell is divided into an anode chamber and a cathode chamber by a cation exchange membrane, and an anode chamber having an anode is charged with an aqueous sodium chloride solution to perform electrolysis. One type of this ion exchange membrane method salt electrolyzer uses a gas diffusion electrode for supplying a gas containing oxygen as a cathode, that is, an oxygen cathode.In this type of electrolyzer, the cathode chamber of the electrolyzer uses a gas chamber. Electrolyte chamber (caustic chamber) containing a gas diffusion electrode configured to supply an oxygen-containing gas to the cathode from the chamber and an aqueous caustic soda solution
It consists of
【０００３】このような従来の電解槽の陰極室において
は、図５に示すように、ガス拡散電極１６は、イオン交
換膜１７との間に電解液導入口１８から導入された電解
液が入る陰極室１９、反対側にはガス入口２０を経て酸
素ガスが供給されるガス室２１から構成されており、ガ
ス拡散電極１６とイオン交換膜１７の電解液導入口１８
側には、陰極室１９を密封するためのパッキング２２が
設けられた構成となっている。In the cathode chamber of such a conventional electrolytic cell, as shown in FIG. 5, the gas diffusion electrode 16 receives the electrolyte introduced from the electrolyte introduction port 18 between the gas diffusion electrode 16 and the ion exchange membrane 17. A cathode chamber 19 and a gas chamber 21 to which oxygen gas is supplied through a gas inlet 20 are provided on the opposite side. The gas diffusion electrode 16 and the electrolyte inlet 18 of the ion exchange membrane 17 are provided.
On the side, a packing 22 for sealing the cathode chamber 19 is provided.
【０００４】そして、従来の電解槽の陰極室において
は、上記のように、ガス拡散電極を使用するにはガス室
を設け、このガス室の周囲を加圧密着させてガス漏れを
防ぐ構造であった。ガス拡散電極の背面は接合されず、
ガス圧より大きい場合は、容易に膨らみガス拡散電極が
破壊されることもあった。また、集電はガス拡散電極の
周囲からか、液圧がガス圧より大きいときには、ガス室
材に使われた金属多孔体にガス供給層が加圧接触するこ
とにより、金属多孔体を導電路としてそれを介してなさ
れていた。As described above, in the conventional cathode chamber of an electrolytic cell, a gas chamber is provided for using a gas diffusion electrode, and the periphery of the gas chamber is press-contacted to prevent gas leakage. there were. The back of the gas diffusion electrode is not joined,
If the pressure is higher than the gas pressure, the gas diffusion electrode may be easily swelled and the gas diffusion electrode may be broken. In addition, current is collected from around the gas diffusion electrode, or when the liquid pressure is higher than the gas pressure, the gas supply layer presses and contacts the porous metal used for the gas chamber material, so that the porous metal is connected to the conductive path. As it was made through.
【０００５】[0005]
【発明が解決しようとする課題】ガス拡散電極の周囲の
みが電解槽枠に固定されている現状では、ガス拡散電極
の集電は、周囲から主にガス拡散電極内部の集電網を通
して距離の長い面方向で行われる。そのため集電抵抗が
大きくなり、抵抗損のため電圧損が大きく、性能が低下
する原因となる。ガス拡散電極の集電を距離の短い厚さ
方向に、抵抗成分から由来する電圧損を最低にする集電
方法が望まれていた。また、ガス圧が液圧より高くて
も、ガス拡散電極が膨らみ、破壊されることのない構造
が望まれていた。In the current situation where only the periphery of the gas diffusion electrode is fixed to the electrolytic cell frame, the current collection of the gas diffusion electrode takes a long distance from the periphery mainly through the current collection network inside the gas diffusion electrode. It is performed in the plane direction. As a result, the current collecting resistance becomes large, the voltage loss becomes large due to the resistance loss, and the performance is reduced. There has been a demand for a current collecting method for minimizing voltage loss originating from a resistance component in the thickness direction of a gas diffusion electrode in a thickness direction having a short distance. Further, there has been a demand for a structure in which the gas diffusion electrode does not swell and is not broken even when the gas pressure is higher than the liquid pressure.
【０００６】本発明は、このような従来の課題に鑑みて
なされたものであり、既存エレメントのようにガス拡散
電極内部の集電網を通して集電することなく、ガス拡散
電極の背面から直接集電できるようにし、しかもガス拡
散電極の背面を多数の個所で固定できるようにし、かつ
酸素が電極に十分拡散することができるガス通路が設け
られるようにして、集電が短距離で行えるため電圧損が
小さく、液圧とガス圧に差が生じても変形することがな
く、破壊しないガス拡散電極を提供することを目的とす
る。[0006] The present invention has been made in view of such a conventional problem, and does not collect electricity through a current collection network inside the gas diffusion electrode as in an existing element, but directly collects electricity from the back of the gas diffusion electrode. In addition, the back of the gas diffusion electrode can be fixed in many places, and a gas passage through which oxygen can diffuse sufficiently to the electrode is provided. It is an object of the present invention to provide a gas diffusion electrode which is small in size, does not deform even if a difference occurs between a liquid pressure and a gas pressure, and does not break.
【０００７】[0007]
【課題を解決するための手段】本発明者は、前記課題を
解決すべく鋭意研究した結果、ガス拡散電極の背面側に
多数の凹凸状溝付き金属板を接合するようにすれば、ガ
ス拡散電極の背面側を多数の個所で固定できるし、かつ
ガス拡散電極の背面側にガスが自由に流通することがで
きるガス通路を確保することができることを考え、その
際ガス拡散電極と金属板との接合は困難であるが、前記
金属板の凸面の個所が銀材で構成されていれば、この銀
材とガス拡散電極とをホットプレスによって接合させる
ことができ、上記目的を達成できることを見出して本発
明を完成するに至った。Means for Solving the Problems The present inventor has made intensive studies to solve the above-mentioned problems, and as a result, it has been found that a large number of concave and convex grooved metal plates can be joined to the back side of a gas diffusion electrode. Considering that the back side of the electrode can be fixed in many places and that a gas passage through which gas can freely flow can be secured on the back side of the gas diffusion electrode, the gas diffusion electrode and the metal plate Is difficult, but if the convex portion of the metal plate is made of a silver material, the silver material and the gas diffusion electrode can be joined by hot pressing, and the above object can be achieved. Thus, the present invention has been completed.
【０００８】すなわち、本発明は、次の構成からなるも
のである。 （１）ガス拡散電極のガス供給層側に多数の凹凸状溝付
き金属板の銀材が存在する凸面を当接させ、ホットプレ
スにより前記溝付き金属板の凸面に存在する銀材部分と
前記ガス拡散電極を接合し、前記金属板の凹溝部をガス
通路として構成したことを特徴とするガス室一体型ガス
拡散電極。 （２）前記接合が温度２００〜４００℃、圧力２０ｋｇ
／ｃｍ2 以上のホットプレス条件により行われることを
特徴とする前記（１）記載のガス室一体型ガス拡散電
極。That is, the present invention has the following configuration. (1) A large number of convex and concave grooves of the metal plate having the uneven groove are brought into contact with the gas supply layer side of the gas diffusion electrode, and the silver material portion existing on the convex surface of the grooved metal plate and the silver member are hot-pressed. A gas diffusion electrode integrated with a gas chamber, wherein a gas diffusion electrode is joined and a concave groove of the metal plate is configured as a gas passage. (2) The joining is performed at a temperature of 200 to 400 ° C. and a pressure of 20 kg.
The gas diffusion electrode integrated with a gas chamber according to the above (1), which is carried out under hot pressing conditions of at least / cm 2 .
【０００９】[0009]
【発明の実施の形態】上記した本発明のガス室一体型ガ
ス拡散電極の技術的特徴を図面に基づいて詳しく説明す
る。なお、実施態様を説明するための全図において、同
一機能を有するものは同一符号を付け、その繰返しの説
明は省略する。本発明においては、多数の凹凸状溝付き
金属板としては、種々の構造を持つものを用いることが
できるが、最も代表的には横方向に角波型の金属板を用
いると、縦方向に多数の凹凸状溝を持つ金属板として使
用することができる。その波型は細かい方がよいし、波
型の凸部が平坦であることはガス拡散電極との接合上好
ましい。このような構造の金属板はプレス成形などによ
り容易に得られる。また、金属板の上面に多数の平行な
溝を持つ金属板を使用してもよく、これは金属板を切削
加工して容易に得られる。溝の形状は平行以外に、ガス
の流速を大にするため大きく屈曲してもよい。また、前
記金属板の溝の深さは、０．５ｍｍ〜１ｍｍ程度で、ガ
スを供給するのに十分な大きさがあればよく、その限度
でなるべく浅い方がガス室の厚さが薄くなり、ガス室一
体型ガス拡散電極の厚さが薄くなって好ましい。また、
０．５ｍｍ〜１ｍｍ程度と溝の幅は小さい方が凸部の面
積が大きくなり、ガス拡散電極との接合面積が大きくな
るが、大きくするとガス拡散電極のガス供給層の露出面
を少なくするので、そのバランスを考慮する必要があ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The technical features of the gas diffusion electrode integrated with a gas chamber of the present invention will be described in detail with reference to the drawings. In all the drawings for describing the embodiments, components having the same function are denoted by the same reference numerals, and the description thereof will not be repeated. In the present invention, as the metal plate with a large number of concave and convex grooves, those having various structures can be used, but most typically, when a metal plate of a square wave type is used in the horizontal direction, It can be used as a metal plate having a large number of uneven grooves. It is better that the wave shape is fine, and it is preferable that the protrusion of the wave shape is flat in connection with the gas diffusion electrode. A metal plate having such a structure can be easily obtained by press molding or the like. Further, a metal plate having a number of parallel grooves on the upper surface of the metal plate may be used, and this is easily obtained by cutting the metal plate. In addition to the parallel shape of the groove, the groove may be largely bent to increase the gas flow rate. Further, the depth of the groove of the metal plate is about 0.5 mm to 1 mm, and it is sufficient that the groove is large enough to supply the gas. The thickness of the gas diffusion electrode integrated with the gas chamber is preferably reduced. Also,
The smaller the groove width is about 0.5 mm to 1 mm, the larger the area of the convex portion and the larger the bonding area with the gas diffusion electrode, but the larger the groove, the smaller the exposed surface of the gas supply layer of the gas diffusion electrode. , It is necessary to consider the balance.
【００１０】図１は、凹凸状角波型の溝付き金属板６と
ガス拡散電極２のガス供給層４とでガス室５を形成する
場合の、両者の接合状態を示す断面説明図である。溝付
き金属板６は、銀をクラッドしたニッケル薄板をプレス
成形して作製したものである。例えば、厚さ０．１ｍｍ
の銀をクラッドした厚さ０．５ｍｍのニッケル板をプレ
ス加工で１．２ｍｍピッチ、１．２ｍｍ深さの波形の縦
溝を作製する。溝付き金属板６の上にガス拡散電極２を
そのガス供給層４が下に来るようにして重ね合わせるこ
とにより、ガス拡散電極２のガス供給層４と溝付き金属
板６の凸面に存在する銀材８を突き合わせ、２００〜４
００℃、２０ｋｇ／ｃｍ2 以上の条件でホットプレスす
る。FIG. 1 is an explanatory cross-sectional view showing a joint state of a gas chamber 5 formed by a grooved metal plate 6 of a concavo-convex square wave type and a gas supply layer 4 of a gas diffusion electrode 2. . The grooved metal plate 6 is formed by press-molding a nickel thin plate clad with silver. For example, thickness 0.1mm
A 0.5 mm thick nickel plate clad with silver is press-formed to form a vertical groove having a 1.2 mm pitch and a 1.2 mm depth. The gas diffusion electrode 2 is superimposed on the grooved metal plate 6 such that the gas supply layer 4 is located below, so that the gas diffusion electrode 2 is present on the convex surface of the grooved metal plate 6 with the gas supply layer 4 of the gas diffusion electrode 2. Butt the silver 8 and 200 ~ 4
Hot pressing is performed at 00 ° C. and 20 kg / cm 2 or more.
【００１１】それにより前記銀材部とガス拡散電極が強
固に接合される。この作用を利用し、ガス通路となる溝
７（ガス室５）を凹部に、銀面を凸部に持つ金属板６と
ガス拡散電極２を上記条件でホットプレスしているの
で、ガス拡散電極１のガス供給層４と銀材８が強固に接
合される。凹凸部は１ｍｍ程度のピッチであるから、集
電が図示したように最短距離で行え、液圧とガス圧の差
が生じても変形することなく、電極が破壊されることは
ない。なお、ガス供給は図示した如く、ガス室５からガ
ス供給層４を通ってガス拡散電極２の反応層３に向かっ
て行われる。また、ホットプレス時には、図示した如く
変形防止材１０が用いられ、これによって、強固な接合
面９が形成される。なお、銀材８は、銀がめっきされた
ものでもよいし、銀クラッドとなっているものでもよ
く、形態を問題とするものではなく、特別に厚い銀部材
が存在する必要はなく、ホットプレスの際に金属板６と
ガス拡散電極２を接合するのに十分な量があればよい。As a result, the silver material portion and the gas diffusion electrode are firmly joined. By utilizing this effect, the metal plate 6 having the groove 7 (gas chamber 5) serving as a gas passage as a concave portion and the metal plate 6 having a silver surface as a convex portion and the gas diffusion electrode 2 are hot pressed under the above conditions. The first gas supply layer 4 and the silver material 8 are firmly joined. Since the uneven portions have a pitch of about 1 mm, current collection can be performed at the shortest distance as shown in the figure, and even if there is a difference between the liquid pressure and the gas pressure, the electrodes are not deformed and the electrodes are not broken. The gas is supplied from the gas chamber 5 to the reaction layer 3 of the gas diffusion electrode 2 through the gas supply layer 4 as shown. Further, at the time of hot pressing, a deformation preventing material 10 is used as shown in the figure, whereby a strong bonding surface 9 is formed. It should be noted that the silver material 8 may be plated with silver or may be silver-clad, and the form is not a problem, and there is no need to provide a specially thick silver member. In this case, it is sufficient that the amount is sufficient to join the metal plate 6 and the gas diffusion electrode 2.
【００１２】図２は、図１の凹凸角波板状プレス成形板
の代わりに溝加工板（溝付き金属板）を使用した場合
の、凹凸状溝付き金属板６とガス拡散電極２のガス供給
層４とでガス室５を形成する場合の、両者の接合状態を
示す断面説明図である。この場合は、凹溝を切削加工に
より深さ１．２ｍｍの縦溝１１に形成し、この凹溝形成
面全体または少なくともガス供給層４との接合面９上に
銀材を貼合せ等適宜の手段により付着させる。この溝付
き金属板６の上部と下部には、図３に示すように横溝１
２のガス溜部を設け、溝付き金属板６の縦溝１１（ガス
室）がつながるように構成される。なお、図２の実施態
様では、ホットプレス時には図１の場合と違って背面全
体が平面になっているので、特に変形防止材１０を用い
なくても、強固な接合面９を形成することができる。FIG. 2 shows the gas of the metal plate 6 with grooves and the gas diffusion electrode 2 when a grooved plate (metal plate with grooves) is used in place of the press-formed plate with a corrugated square wave plate of FIG. FIG. 4 is an explanatory cross-sectional view showing a bonding state of a gas chamber 5 and a supply layer 4 when the gas chamber 5 is formed. In this case, a concave groove is formed in the vertical groove 11 having a depth of 1.2 mm by cutting, and a silver material is attached to the entire concave groove forming surface or at least on a bonding surface 9 with the gas supply layer 4 by appropriate bonding. Attach by means. The upper and lower portions of the grooved metal plate 6 have lateral grooves 1 as shown in FIG.
2 gas reservoirs are provided so that the vertical grooves 11 (gas chambers) of the grooved metal plate 6 are connected. In the embodiment shown in FIG. 2, since the entire back surface is flat during hot pressing unlike the case shown in FIG. 1, it is possible to form a strong joint surface 9 without using the deformation preventing material 10 in particular. it can.
【００１３】溝付き金属板６用の板材は銀板でも良い
が、強度と価格の点から銀ニッケルクラッド材が良い。
このほかに、銀銅クラッド材、銀カーボン張り合わせ材
でも良い。ガス拡散電極の給電体は銀網、銀メッキ発泡
ニッケルが好適に使用できる。反応層３がカーボンブラ
ック系、銀とポリテトラフルオロエチレン（ＰＴＦＥ）
から成るガス拡散電極等の各種のガス拡散電極が使用で
きる。接合面７はガス拡散電極の一部であれば、カーボ
ンブラックとＰＴＦＥの混合物であるガス供給層４、銀
集電網、銀微粒子またはこれらの共存部でも良い。The plate material for the grooved metal plate 6 may be a silver plate, but a silver-nickel clad material is preferable in terms of strength and cost.
In addition, a silver-copper clad material or a silver-carbon bonding material may be used. A silver mesh or silver-plated foamed nickel can be suitably used as the power supply of the gas diffusion electrode. Reaction layer 3 is made of carbon black, silver and polytetrafluoroethylene (PTFE)
Various gas diffusion electrodes such as a gas diffusion electrode composed of As long as the bonding surface 7 is a part of the gas diffusion electrode, the gas supply layer 4, which is a mixture of carbon black and PTFE, a silver current collector network, silver fine particles, or a coexisting portion thereof may be used.
【００１４】銀板をガス拡散電極２のガス供給層４と重
ね、合わせ部に２００℃〜４００℃、１０〜１００ｋｇ
／ｃｍ2 でホットプレスを行うことでガス拡散電極２と
接合出来る。補強のために図４（ａ）に示すように、ガ
ス拡散電極２の周囲には銀薄板（０．１ｍｍ）で銀縁１
３を付けても良い。なお、図４において、（ａ）は本発
明に係る凹凸板接合ガス拡散電極の平面図、（ｂ）はそ
の縦方向の断面図、（ｃ）は横方向の断面図である。A silver plate is superimposed on the gas supply layer 4 of the gas diffusion electrode 2, and 200 to 400 ° C., 10 to 100 kg
By performing hot pressing at a pressure of / cm 2 , the gas diffusion electrode 2 can be joined. As shown in FIG. 4 (a) for reinforcement, a silver thin plate (0.1 mm) around the gas diffusion electrode 2
You may attach 3. In FIG. 4, (a) is a plan view of the gas diffusion electrode for concavo-convex plate according to the present invention, (b) is a longitudinal sectional view, and (c) is a transverse sectional view.
【００１５】[0015]
【発明の効果】本発明の凹凸板接合ガス拡散電極は、ガ
ス拡散電極と銀を、ガス通路となる溝を凹部に、銀面を
凸部に持つ金属板材とガス拡散電極を重ね合わせ、２０
０℃〜４００℃、２０ｋｇ／ｃｍ2 以上の条件でホット
プレスすることによって、これらが強固に接合される。
ガス拡散電極の集電が距離の短い厚さ方向となったの
で、抵抗成分に由来する電圧損が最低になった。また、
ガス圧が液圧より高くても、ガス拡散電極が膨らみ破壊
されることのないガス拡散電極となった。According to the gas diffusion electrode of the present invention, a gas diffusion electrode and silver, a metal plate material having a groove serving as a gas passage in a concave portion and a silver surface in a convex portion are superposed on the gas diffusion electrode.
By hot pressing under the conditions of 0 ° C. to 400 ° C. and 20 kg / cm 2 or more, these are firmly joined.
Since the current collection of the gas diffusion electrode was in the thickness direction with a short distance, the voltage loss due to the resistance component was minimized. Also,
Even when the gas pressure was higher than the liquid pressure, the gas diffusion electrode was not swelled and was not broken.
【図１】本発明の凹凸板接合ガス拡散電極の一実施態様
の要部を示す断面説明図である。FIG. 1 is an explanatory cross-sectional view showing a main part of one embodiment of a gas diffusion electrode for bonding a concavo-convex plate of the present invention.
【図２】本発明の凹凸板接合ガス拡散電極の溝加工板を
用いた場合の要部を示す断面説明図である。FIG. 2 is an explanatory cross-sectional view showing a main part when a grooved plate of the gas diffusion electrode for bonding a concave-convex plate of the present invention is used.
【図３】本発明に係る溝付き金属板の溝構成を説明する
平面図である。FIG. 3 is a plan view illustrating a groove configuration of the grooved metal plate according to the present invention.
【図４】（ａ）は本発明のガス拡散電極の全体の一例を
示す平面図、（ｂ）はその縦方向の断面図、（ｃ）は横
方向の断面図である。4A is a plan view showing an example of the entire gas diffusion electrode of the present invention, FIG. 4B is a longitudinal sectional view thereof, and FIG. 4C is a transverse sectional view thereof.
【図５】従来の酸素陰極の電解槽構造の一例を示す断面
説明図である。FIG. 5 is an explanatory sectional view showing an example of a conventional oxygen cathode electrolytic cell structure.
１ ガス室一体型ガス拡散電極 ２ ガス拡散電極 ３ 反応層 ４ ガス供給層 ５ ガス室 ６ 溝付き金属板 ７ 溝 ８ 銀材 ９ 接合面 １０ 変形防止材 １１ 縦溝 １２ 横溝 １３ 銀縁 １４ ガス入口 １５ ガス出口 １６ ガス拡散電極 １７ イオン交換膜 １８ 電解液導入口 １９ 陰極室 ２０ ガス入口 ２１ ガス室 ２２ パッキング REFERENCE SIGNS LIST 1 gas chamber integrated gas diffusion electrode 2 gas diffusion electrode 3 reaction layer 4 gas supply layer 5 gas chamber 6 grooved metal plate 7 groove 8 silver material 9 bonding surface 10 deformation prevention material 11 vertical groove 12 horizontal groove 13 silver edge 14 gas inlet 15 Gas outlet 16 Gas diffusion electrode 17 Ion exchange membrane 18 Electrolyte inlet 19 Cathode chamber 20 Gas inlet 21 Gas chamber 22 Packing
フロントページの続き (72)発明者 古屋 長一 山梨県甲府市中村町２−14 (56)参考文献 特開 平７−211326（ＪＰ，Ａ) 特開 平９−279381（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C25B 1/00 - 15/08 Continuation of the front page (72) Inventor Choichi Furiya 2-14 Nakamura-cho, Kofu-shi, Yamanashi Prefecture (56) References JP-A-7-211326 (JP, A) JP-A-9-279381 (JP, A) (58) ) Surveyed field (Int.Cl. 7 , DB name) C25B 1/00-15/08
Claims (2)
凸状溝付き金属板の銀材が存在する凸面を当接させ、ホ
ットプレスにより前記溝付き金属板の凸面に存在する銀
材部分と前記ガス拡散電極を接合し、前記金属板の凹溝
部をガス通路として構成したことを特徴とするガス室一
体型ガス拡散電極。1. A method in which a convex surface of a metal plate having a large number of concave and convex grooves in which a silver material exists is brought into contact with a gas supply layer side of a gas diffusion electrode, and a silver material portion present on the convex surface of the metal plate with the groove by hot pressing. And a gas diffusion electrode, wherein the gas diffusion electrode is joined to the gas diffusion electrode, and a concave groove of the metal plate is formed as a gas passage.
２０ｋｇ／ｃｍ2 以上のホットプレス条件により行われ
ることを特徴とする請求項１記載のガス室一体型ガス拡
散電極。2. The gas diffusion electrode according to claim 1, wherein the bonding is performed under a hot pressing condition at a temperature of 200 to 400 ° C. and a pressure of 20 kg / cm 2 or more.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11074132A JP3086854B1 (en) | 1999-03-18 | 1999-03-18 | Gas diffusion electrode integrated with gas chamber |
| EP00905324A EP1076115A1 (en) | 1999-02-25 | 2000-02-24 | Gas diffusion electrode and brine electrolytic bath |
| PCT/JP2000/001074 WO2000050668A1 (en) | 1999-02-25 | 2000-02-24 | Gas diffusion electrode and brine electrolytic bath |
| US09/674,004 US6423194B1 (en) | 1999-02-25 | 2000-02-24 | Gas diffusion electrode and brine electrolytic bath |
| CNB008002096A CN1148467C (en) | 1999-02-25 | 2000-02-24 | Gas diffusion electrode and brine electrolytic bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11074132A JP3086854B1 (en) | 1999-03-18 | 1999-03-18 | Gas diffusion electrode integrated with gas chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP3086854B1 true JP3086854B1 (en) | 2000-09-11 |
| JP2000273674A JP2000273674A (en) | 2000-10-03 |
Family
ID=13538369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11074132A Expired - Fee Related JP3086854B1 (en) | 1999-02-25 | 1999-03-18 | Gas diffusion electrode integrated with gas chamber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3086854B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10148600A1 (en) * | 2001-10-02 | 2003-04-10 | Bayer Ag | Electrolyzer used for electrolyzing hydrochloric acid has gas diffusion electrodes fixed to current collector |
-
1999
- 1999-03-18 JP JP11074132A patent/JP3086854B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000273674A (en) | 2000-10-03 |
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