JPH11256378A - Electrolytic cell of water using solid polymer electrolyte membrane - Google Patents
Electrolytic cell of water using solid polymer electrolyte membraneInfo
- Publication number
- JPH11256378A JPH11256378A JP10057661A JP5766198A JPH11256378A JP H11256378 A JPH11256378 A JP H11256378A JP 10057661 A JP10057661 A JP 10057661A JP 5766198 A JP5766198 A JP 5766198A JP H11256378 A JPH11256378 A JP H11256378A
- Authority
- JP
- Japan
- Prior art keywords
- exchange membrane
- ion exchange
- membrane
- anode
- cathode
- 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
- 239000012528 membrane Substances 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 40
- 239000005518 polymer electrolyte Substances 0.000 title claims description 18
- 239000007787 solid Substances 0.000 title claims description 16
- 239000003014 ion exchange membrane Substances 0.000 claims abstract description 85
- 239000003054 catalyst Substances 0.000 claims abstract description 17
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 238000005868 electrolysis reaction Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 5
- 238000007772 electroless plating Methods 0.000 claims description 3
- 229910052741 iridium Inorganic materials 0.000 claims description 3
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 12
- 229910052760 oxygen Inorganic materials 0.000 description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 11
- 239000001257 hydrogen Substances 0.000 description 11
- 229910052739 hydrogen Inorganic materials 0.000 description 11
- 125000006850 spacer group Chemical group 0.000 description 6
- 230000008961 swelling Effects 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005341 cation exchange Methods 0.000 description 2
- 150000001768 cations Chemical group 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- HWLDNSXPUQTBOD-UHFFFAOYSA-N platinum-iridium alloy Chemical compound [Ir].[Pt] HWLDNSXPUQTBOD-UHFFFAOYSA-N 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高分子電解質膜を
用いる水素および酸素製造のための水電解槽に関するも
のである。The present invention relates to a water electrolyzer for producing hydrogen and oxygen using a polymer electrolyte membrane.
【０００２】[0002]
【従来の技術】従来、高分子電解質膜を用いて水電解に
よって水素および酸素を製造する場合のフィルタープレ
ス式水電解槽としては、特開平７−２５２６８２に開示
されたものが知られている。この水電解槽は、図３およ
び図４に示すように、両端に配された陽極主電極(1) お
よび陰極主電極(2) と、これら主電極(1) (2) の間に直
列に配された複数の単位セルと、これらを一体化する各
４本の締め付けボルトおよびナットとから主として構成
され、１つのセルは、チタン合金製の複極板(9)の陽極
側と、陽極給電体(7) と、固体高分子電解質膜からなる
電極接合体膜(3)と、陰極給電体(8) と、隣の複極板(9)
の陰極側からなり、電極接合体膜(3) は、イオン交換
膜(4) とその両面に設けられた触媒電極層(5) (6) とか
らなる。単位セルの個数は、商業規模の電解槽では、８
０から６００である。同図において、(21)はフランジ、
(22)はノズルプレート、(23)は絶縁パッキン、(24)はＯ
リングガスケット、(25)は多孔質スペーサー、(26)はシ
ールガスケットをそれぞれ示す。2. Description of the Related Art Conventionally, as a filter press type water electrolyzer for producing hydrogen and oxygen by water electrolysis using a polymer electrolyte membrane, a filter press type water electrolyzer disclosed in JP-A-7-252682 is known. As shown in FIGS. 3 and 4, the water electrolyzer comprises an anode main electrode (1) and a cathode main electrode (2) arranged at both ends, and a series connection between these main electrodes (1) and (2). It is mainly composed of a plurality of unit cells arranged and four fastening bolts and nuts for integrating them, and one cell has an anode side of a titanium alloy multi-polar plate (9) and an anode power supply. Body (7), electrode assembly membrane (3) composed of solid polymer electrolyte membrane, cathode feeder (8), and adjacent bipolar plate (9)
The electrode assembly membrane (3) comprises an ion exchange membrane (4) and catalyst electrode layers (5) and (6) provided on both surfaces thereof. The number of unit cells is 8 for a commercial scale electrolytic cell.
0 to 600. In the figure, (21) is a flange,
(22) is a nozzle plate, (23) is an insulating packing, (24) is O
A ring gasket, (25) shows a porous spacer, and (26) shows a seal gasket.
【０００３】上記構成の水電解槽によると、先ず電解槽
下部の給水ヘッダー(10)から供給された水は、多孔質の
陽極給電体(7) を通って、電極接合体膜(3) の陽極側触
媒電極層(5) に達する。ここで付加された電力により水
の電気分解反応が起こり、酸素が発生する。発生した酸
素は陽極給電体(7) を通り、複極板(9) の陽極側に設け
られた垂直流路内を未反応の水とともに上昇し、複極板
(9) の酸素ヘッダー(11)の外周に設けられた多孔質スペ
ーサー(25)を通って酸素ヘッダー(11)に排出される。一
方、電極接合体膜(3) の陰極側触媒電極層(6) 表面で発
生した水素とイオン交換膜(4) を透過した水は、陰極給
電体(8) を通り、複極板(9) の陰極側に設けられた垂直
流路内を上昇し、複極板(9) の水素ヘッダー(12)の外周
に設けられた多孔質スペーサー(25)を通って水素ヘッダ
ー(12)に排出される。According to the water electrolysis tank having the above structure, first, water supplied from a water supply header (10) below the electrolysis tank passes through a porous anode power feeder (7) and passes through an electrode assembly membrane (3). It reaches the anode-side catalyst electrode layer (5). Here, the electrolysis reaction of water occurs by the added electric power, and oxygen is generated. The generated oxygen passes through the anode feeder (7), rises in the vertical flow path provided on the anode side of the bipolar plate (9) together with unreacted water, and flows through the bipolar plate.
It is discharged to the oxygen header (11) through the porous spacer (25) provided on the outer periphery of the oxygen header (11) of (9). On the other hand, hydrogen generated on the surface of the catalyst electrode layer (6) on the cathode side of the electrode assembly membrane (3) and water permeated through the ion exchange membrane (4) pass through the cathode feeder (8) and pass through the bipolar plate (9). ) Rises in the vertical channel provided on the cathode side, and is discharged to the hydrogen header (12) through the porous spacer (25) provided on the outer periphery of the hydrogen header (12) of the bipolar plate (9). Is done.
【０００４】[0004]
【発明が解決しようとする課題】上記従来の電解槽で
は、図４に示すように、複極板(9) の周縁部とイオン交
換膜(4) の周縁部との間にＯリングガスケット（シール
部材）(24)が介在されており、イオン交換膜(4) のＯリ
ングガスケット(24)より外側の部分は、乾燥しているの
に対して、イオン交換膜(4) のＯリングガスケット(24)
より内側の部分は、電解液により湿潤状態とされ、乾燥
状態よりも１０〜１５％膨張している。そのため、Ｏリ
ングガスケット(24)の近傍では、大きい応力が生じ、イ
オン交換膜(4) の破損が頻繁に起こるという問題があっ
た。In the above-mentioned conventional electrolytic cell, as shown in FIG. 4, an O-ring gasket (see FIG. 4) is provided between the periphery of the bipolar plate (9) and the periphery of the ion exchange membrane (4). A sealing member (24) is interposed, and the portion of the ion exchange membrane (4) outside the O-ring gasket (24) is dry, whereas the O-ring gasket of the ion exchange membrane (4) is dry. (twenty four)
The inner part is wetted by the electrolytic solution and swells 10 to 15% more than the dry state. Therefore, there is a problem that a large stress is generated in the vicinity of the O-ring gasket (24), and the ion exchange membrane (4) is frequently damaged.
【０００５】本発明は、上記のような問題点を解決すべ
く工夫されたもので、イオン交換膜の破損の問題を解消
した電解槽を提供することをその目的とする。[0005] The present invention has been devised to solve the above problems, and has as its object to provide an electrolytic cell in which the problem of breakage of the ion exchange membrane is eliminated.
【０００６】[0006]
【課題を解決するための手段】この発明による水電解槽
は、両端に配された陽極主電極(1) および陰極主電極
(2) と、これら主電極(1) (2) の間に直列に配された複
数の単位セルと、これらを一体化する締め付け具とを具
備し、１つのセルは、チタン合金製の複極板(9)の陽極
側と、陽極給電体(7) と、電解用イオン交換膜(4) およ
びその両面に設けられた触媒電極層(5) (6) からなる電
極接合体膜(3) と、陰極給電体(8) と、隣の複極板(9)
の陰極側からなり、複極板(9) の周縁部とイオン交換膜
(4) の周縁部との間にシール部材(24)が介在されている
水電解槽において、イオン交換膜(4) のシール部材(24)
に接する部分に補強層(39)が設けられていることを特徴
とするものである。A water electrolyzer according to the present invention comprises an anode main electrode (1) and a cathode main electrode arranged at both ends.
(2), a plurality of unit cells arranged in series between the main electrodes (1) and (2), and a fastener for integrating the unit cells, and one cell is made of a titanium alloy The electrode assembly membrane (3) comprising the anode side of the electrode plate (9), the anode power feeder (7), the ion exchange membrane for electrolysis (4) and the catalyst electrode layers (5) (6) provided on both sides thereof ), The cathode feeder (8) and the adjacent bipolar plate (9)
The periphery of the bipolar plate (9) and the ion exchange membrane
In a water electrolysis tank in which a sealing member (24) is interposed between the sealing member (24) and the periphery of the ion exchange membrane (4), the sealing member (24)
, A reinforcing layer (39) is provided in a portion in contact with.
【０００７】このようなイオン交換膜(4) を得るには、
平坦なイオン交換膜の周縁部に枠状の補強用イオン交換
膜を圧着すればよい。また、枠状の補強用イオン交換膜
を一度に圧着する代わりに、帯状の補強用イオン交換膜
を平坦なイオン交換膜の周縁部に沿って順次圧着してい
くようにしてもよい。補強用イオン交換膜は、平坦なイ
オン交換膜と同材質であってもよいし、補強材が内蔵さ
れたものでもよい。In order to obtain such an ion exchange membrane (4),
What is necessary is just to crimp a frame-shaped reinforcing ion exchange membrane on the peripheral edge of the flat ion exchange membrane. Instead of pressing the frame-shaped reinforcing ion-exchange membrane all at once, the belt-shaped reinforcing ion-exchange membrane may be sequentially pressed along the periphery of the flat ion-exchange membrane. The reinforcing ion exchange membrane may be of the same material as the flat ion exchange membrane, or may have a reinforcing material incorporated therein.
【０００８】また、触媒電極層(5) (6) が、イオン交換
膜(4) に白金とイリジウムの無電解メッキを施すことに
より形成されていることが好ましい。The catalyst electrode layers (5) and (6) are preferably formed by subjecting the ion exchange membrane (4) to electroless plating of platinum and iridium.
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施の形態を説明
する。Embodiments of the present invention will be described below.
【００１０】この発明の固体高分子電解質膜を用いる水
電解槽は、図３および図４に示した従来のものと電極接
合体膜(3) の構成のみが異なっている。すなわち、この
電極接合体膜(3) は、図１および図２に示すように、周
縁部が増厚された電解用イオン交換膜(4) と、その両面
に設けられた触媒電極層(5) (6) とからなるものであ
る。イオン交換膜(4) は、平坦なイオン交換膜本体(4a)
に枠状の補強イオン交換膜(39)が圧着されることにより
得られたものである。The water electrolyzer using the solid polymer electrolyte membrane of the present invention differs from the conventional one shown in FIGS. 3 and 4 only in the structure of the electrode assembly membrane (3). That is, as shown in FIGS. 1 and 2, the electrode assembly membrane (3) is composed of an electrolytic ion exchange membrane (4) having a thickened peripheral portion and a catalyst electrode layer (5) provided on both surfaces thereof. ) (6). The ion exchange membrane (4) is a flat ion exchange membrane body (4a)
This is obtained by crimping a frame-shaped reinforcing ion exchange membrane (39) on the substrate.
【００１１】上記構成によると、イオン交換膜(4) のう
ちＯリングガスケット(24)に接触する部分が補強されて
いるので、イオン交換膜(4) のＯリングガスケット(24)
より外側の部分が乾燥状態、同内側の部分が膨潤状態と
なって、イオン交換膜(4) の周縁部に大きい応力が生じ
ても、イオン交換膜(4) の破損が起こらない。給電体
(7)(8)に接触して電流が流れる部分は、従来と同じ厚さ
のままであるから、電気抵抗は大きくなっておらず、従
来のものに比べると、電解特性は不変で、イオン交換膜
(4) の強度だけを上げることができる。According to the above construction, since the portion of the ion exchange membrane (4) that contacts the O-ring gasket (24) is reinforced, the O-ring gasket (24) of the ion exchange membrane (4) is reinforced.
Even if the outer part is in a dry state and the inner part is in a swelling state, even if a large stress is generated at the periphery of the ion exchange membrane (4), the ion exchange membrane (4) is not damaged. Feeder
(7) Since the portion where the current flows in contact with (8) remains the same thickness as the conventional one, the electrical resistance has not increased, and the electrolytic properties are unchanged compared to the conventional one, Exchange membrane
Only the strength of (4) can be increased.
【００１２】実施例 イオン（カチオン）交換膜本体(4a)を、縦１２５０ｍ
ｍ，横３５０ｍｍ、厚み０．１ｍｍとし、その周縁部分
を、幅２５ｍｍ、厚み０．２ｍｍの同種のカチオン交換
膜(39)により補強し、カチオン交換膜本体(4a)の中央部
分（縦９１０ｍｍ，横２３０ｍｍ）をブラスト処理し、
これに公知の方法（特公平２−２０７０９号公報参照）
により、白金・イリジウムメッキを行って、電極接合体
膜(3) を形成し、こうして得られた電極接合体膜(3) を
備えた構成で１０組のセル電解槽モジュールに組み立て
たところ、イオン交換膜(4) の破損は全く起こらなかっ
た。EXAMPLE An ion (cation) exchange membrane main body (4a) was vertically extended to 1250 m.
m, 350 mm in width and 0.1 mm in thickness, and the peripheral portion thereof is reinforced by the same type of cation exchange membrane (39) having a width of 25 mm and a thickness of 0.2 mm. Blast processing 230mm in width)
A known method (see Japanese Patent Publication No. 2-20709)
Then, platinum-iridium plating was performed to form an electrode assembly film (3), and the resulting assembly of the electrode assembly film (3) was assembled into 10 cell electrolytic cell modules. No breakage of the exchange membrane (4) occurred.
【００１３】[0013]
【発明の効果】本発明の水電解槽によると、イオン交換
膜のうちシール部材に接触する部分が補強されているの
で、イオン交換膜のシール部材より外側の部分が乾燥状
態、同内側の部分が膨潤状態となって、イオン交換膜の
周縁部に大きい応力が生じても、イオン交換膜の破損が
起こらない。According to the water electrolysis tank of the present invention, since the portion of the ion exchange membrane that contacts the seal member is reinforced, the portion of the ion exchange membrane outside the seal member is in a dry state, and the inside portion is the same. Even if the swelling state causes a large stress on the peripheral portion of the ion exchange membrane, the ion exchange membrane is not damaged.
【図１】この発明のフィルタープレス式水電解槽の要部
の断面図である。FIG. 1 is a sectional view of a main part of a filter press type water electrolysis tank of the present invention.
【図２】同分解斜視図である。FIG. 2 is an exploded perspective view of the same.
【図３】従来のフィルタープレス式水電解槽の分解状態
を示す分解斜視図である。FIG. 3 is an exploded perspective view showing a disassembled state of a conventional filter press type water electrolysis tank.
【図４】同要部の断面図である。FIG. 4 is a cross-sectional view of the main part.
１：陽極主電極 ２：陰極主電極 ３：電極接合体膜 ４：イオン交換膜 4a：イオン交換膜本体 ５：陽極側触媒電極層 ６：陰極側触媒電極層 ７：陽極給電体 ８：陰極給電体 ９：複極板 ２４：Ｏリングガスケット（シール部材） ３９：補強イオン交換膜 1: Anode main electrode 2: Cathode main electrode 3: Electrode assembly membrane 4: Ion exchange membrane 4a: Ion exchange membrane main body 5: Anode side catalyst electrode layer 6: Cathode side catalyst electrode layer 7: Anode power supply 8: Cathode power supply Body 9: Double electrode plate 24: O-ring gasket (seal member) 39: Reinforced ion exchange membrane
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【手続補正書】[Procedure amendment]
【提出日】平成１１年３月４日[Submission date] March 4, 1999
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】全文[Correction target item name] Full text
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【書類名】 明細書[Document Name] Statement
【発明の名称】 固体高分子電解質膜を用いる水電解槽[Title of the Invention] Water electrolysis tank using solid polymer electrolyte membrane
【特許請求の範囲】[Claims]
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【発明の属する技術分野】本発明は、高分子電解質膜を
用いる水素および酸素製造のための水電解槽に関するも
のである。The present invention relates to a water electrolyzer for producing hydrogen and oxygen using a polymer electrolyte membrane.
【０００２】[0002]
【従来の技術】従来、高分子電解質膜を用いて水電解に
よって水素および酸素を製造する場合のフィルタープレ
ス式水電解槽としては、特開平７−２５２６８２に開示
されたものが知られている。この水電解槽は、図３およ
び図４に示すように、両端に配された陽極主電極(1) お
よび陰極主電極(2) と、これら主電極(1) (2) の間に直
列に配された複数の単位セルと、これらを一体化する各
４本の締め付けボルトおよびナットとから主として構成
され、１つのセルは、チタン合金製の複極板(9)の陽極
側と、陽極給電体(7) と、固体高分子電解質膜(3) と、
陰極給電体(8) と、隣の複極板(9) の陰極側からなり、
固体高分子電解質膜(3) は、イオン交換膜(4) とその両
面に設けられた触媒電極層(5) (6) とからなる。単位セ
ルの個数は、商業規模の電解槽では、８０から６００で
ある。同図において、(21)はフランジ、(22)はノズルプ
レート、(23)は絶縁パッキン、(24)はＯリングガスケッ
ト、(25)は多孔質スペーサー、(26)はシールガスケット
をそれぞれ示す。2. Description of the Related Art Conventionally, as a filter press type water electrolyzer for producing hydrogen and oxygen by water electrolysis using a polymer electrolyte membrane, a filter press type water electrolyzer disclosed in JP-A-7-252682 is known. As shown in FIGS. 3 and 4, the water electrolyzer comprises an anode main electrode (1) and a cathode main electrode (2) arranged at both ends, and a series connection between these main electrodes (1) and (2). It is mainly composed of a plurality of unit cells arranged, and four fastening bolts and nuts each of which integrates the unit cells. One cell has an anode side of a titanium alloy multi-polar plate (9) and an anode power supply. Body (7), solid polymer electrolyte membrane (3 ),
It consists of a cathode feeder (8) and the cathode side of the adjacent bipolar plate (9),
The solid polymer electrolyte membrane (3) comprises an ion exchange membrane (4) and catalyst electrode layers (5) (6) provided on both surfaces thereof. The number of unit cells is 80 to 600 for a commercial scale electrolytic cell. In the figure, (21) shows a flange, (22) shows a nozzle plate, (23) shows an insulating packing, (24) shows an O-ring gasket, (25) shows a porous spacer, and (26) shows a seal gasket.
【０００３】上記構成の水電解槽によると、先ず電解槽
下部の給水ヘッダー(10)から供給された水は、多孔質の
陽極給電体(7) を通って、固体高分子電解質膜(3) の陽
極側触媒電極層(5) に達する。ここで付加された電力に
より水の電気分解反応が起こり、酸素が発生する。発生
した酸素は陽極給電体(7) を通り、複極板(9) の陽極側
に設けられた垂直流路内を未反応の水とともに上昇し、
複極板(9) の酸素ヘッダー(11)の外周に設けられた多孔
質スペーサー(25)を通って酸素ヘッダー(11)に排出され
る。一方、固体高分子電解質膜(3) の陰極側触媒電極層
(6) 表面で発生した水素とイオン交換膜(4) を透過した
水は、陰極給電体(8) を通り、複極板(9) の陰極側に設
けられた垂直流路内を上昇し、複極板(9) の水素ヘッダ
ー(12)の外周に設けられた多孔質スペーサー(25)を通っ
て水素ヘッダー(12)に排出される。According to the water electrolysis tank having the above structure, first, water supplied from a water supply header (10) below the electrolysis tank passes through a porous anode power feeder (7) and passes through a solid polymer electrolyte membrane (3). To the anode-side catalyst electrode layer (5). Here, the electrolysis reaction of water occurs by the added electric power, and oxygen is generated. The generated oxygen passes through the anode power feeder (7) and rises in the vertical channel provided on the anode side of the bipolar plate (9) together with unreacted water,
It is discharged to the oxygen header (11) through a porous spacer (25) provided on the outer periphery of the oxygen header (11) of the bipolar plate (9). On the other hand, the catalyst electrode layer on the cathode side of the polymer electrolyte membrane (3)
(6) The hydrogen generated on the surface and the water permeating the ion exchange membrane (4) pass through the cathode power feeder (8) and rise in the vertical channel provided on the cathode side of the bipolar plate (9). The hydrogen is discharged to the hydrogen header (12) through a porous spacer (25) provided on the outer periphery of the hydrogen header (12) of the bipolar plate (9).
【０００４】[0004]
【発明が解決しようとする課題】上記従来の電解槽で
は、図４に示すように、複極板(9) の周縁部とイオン交
換膜(4) の周縁部との間にＯリングガスケット（シール
部材）(24)が介在されており、イオン交換膜(4) のＯリ
ングガスケット(24)より外側の部分は、乾燥しているの
に対して、イオン交換膜(4) のＯリングガスケット(24)
より内側の部分は、電解液により湿潤状態とされ、乾燥
状態よりも１０〜１５％膨張している。そのため、Ｏリ
ングガスケット(24)の近傍では、大きい応力が生じ、イ
オン交換膜(4) の破損が頻繁に起こるという問題があっ
た。In the above-mentioned conventional electrolytic cell, as shown in FIG. 4, an O-ring gasket (see FIG. 4) is provided between the periphery of the bipolar plate (9) and the periphery of the ion exchange membrane (4). A sealing member (24) is interposed, and the portion of the ion exchange membrane (4) outside the O-ring gasket (24) is dry, whereas the O-ring gasket of the ion exchange membrane (4) is dry. (twenty four)
The inner part is wetted by the electrolytic solution and swells 10 to 15% more than the dry state. Therefore, there is a problem that a large stress is generated in the vicinity of the O-ring gasket (24), and the ion exchange membrane (4) is frequently damaged.
【０００５】本発明は、上記のような問題点を解決すべ
く工夫されたもので、イオン交換膜の破損の問題を解消
した電解槽を提供することをその目的とする。[0005] The present invention has been devised to solve the above problems, and has as its object to provide an electrolytic cell in which the problem of breakage of the ion exchange membrane is eliminated.
【０００６】[0006]
【課題を解決するための手段】この発明による水電解槽
は、両端に配された陽極主電極(1) および陰極主電極
(2) と、これら主電極(1) (2) の間に直列に配された複
数の単位セルと、これらを一体化する締め付け具とを具
備し、１つのセルは、チタン合金製の複極板(9)の陽極
側と、陽極給電体(7) と、電解用イオン交換膜(4) およ
びその両面に設けられた触媒電極層(5) (6) からなる固
体高分子電解質膜(3) と、陰極給電体(8)と、隣の複極
板(9) の陰極側からなり、複極板(9) の周縁部とイオン
交換膜(4)の周縁部との間にシール部材(24)が介在され
ている水電解槽において、イオン交換膜(4) のシール部
材(24)に接する部分に補強イオン交換膜層(39)が圧着さ
れていることを特徴とするものである。A water electrolyzer according to the present invention comprises an anode main electrode (1) and a cathode main electrode arranged at both ends.
(2), a plurality of unit cells arranged in series between the main electrodes (1) and (2), and a fastener for integrating them, and one cell is made of a titanium alloy composite. A solid body consisting of the anode side of the electrode plate (9), the anode power feeder (7), the ion exchange membrane for electrolysis (4) and the catalyst electrode layers (5) (6) provided on both sides thereof
Composed of a polymer electrolyte membrane (3), a cathode feeder (8), and the cathode side of the adjacent bipolar plate (9) .The periphery of the bipolar plate (9) and the periphery of the ion exchange membrane (4) in water electrolysis tank sealing member (24) is interposed, ion-exchange membrane (4) portion in the reinforcing ion exchange membrane layer in contact with the sealing member (24) in (39) is crimped between the
It is characterized by having been done.
【０００７】このようなイオン交換膜(4) を得るには、
平坦なイオン交換膜の周縁部に枠状の補強用イオン交換
膜を圧着すればよい。また、枠状の補強用イオン交換膜
を一度に圧着する代わりに、帯状の補強用イオン交換膜
を平坦なイオン交換膜の周縁部に沿って順次圧着してい
くようにしてもよい。補強用イオン交換膜は、平坦なイ
オン交換膜と同材質であってもよいし、補強材が内蔵さ
れたものでもよい。In order to obtain such an ion exchange membrane (4),
What is necessary is just to crimp a frame-shaped reinforcing ion exchange membrane on the peripheral edge of the flat ion exchange membrane. Instead of pressing the frame-shaped reinforcing ion-exchange membrane all at once, the belt-shaped reinforcing ion-exchange membrane may be sequentially pressed along the periphery of the flat ion-exchange membrane. The reinforcing ion exchange membrane may be of the same material as the flat ion exchange membrane, or may have a reinforcing material incorporated therein.
【０００８】また、固体高分子電解質膜(3) が、イオン
交換膜(4) に白金層とイリジウム層からなる無電解メッ
キを施すことにより形成されていることが好ましい。It is preferable that the solid polymer electrolyte membrane (3) is formed by subjecting the ion exchange membrane (4) to electroless plating comprising a platinum layer and an iridium layer .
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施の形態を説明
する。Embodiments of the present invention will be described below.
【００１０】この発明の固体高分子電解質膜を用いる水
電解槽は、図３および図４に示した従来のものと固体高
分子電解質膜(3) の構成のみが異なっている。すなわ
ち、この固体高分子電解質膜(3) は、図１および図２に
示すように、周縁部が増厚された電解用イオン交換膜
(4) と、その両面に設けられた触媒電極層(5) (6) とか
らなるものである。イオン交換膜(4) は、平坦なイオン
交換膜本体(4a)に枠状の補強イオン交換膜(39)が圧着さ
れることにより得られたものである。[0010] Water electrolysis cell using a solid polymer electrolyte membrane of the present invention are those of the prior art shown in FIGS. 3 and 4 and solid high
Only the structure of the molecular electrolyte membrane (3) is different. That is, as shown in FIGS. 1 and 2, the solid polymer electrolyte membrane (3) has an ion-exchange membrane for electrolysis having a thickened peripheral portion.
(4) and catalyst electrode layers (5) and (6) provided on both surfaces thereof. The ion exchange membrane (4) is obtained by pressing a frame-shaped reinforcing ion exchange membrane (39) on a flat ion exchange membrane main body (4a).
【００１１】上記構成によると、イオン交換膜(4) のう
ちＯリングガスケット(24)に接触する部分が補強されて
いるので、イオン交換膜(4) のＯリングガスケット(24)
より外側の部分が乾燥状態、同内側の部分が膨潤状態と
なって、イオン交換膜(4) の周縁部に大きい応力が生じ
ても、イオン交換膜(4) の破損が起こらない。給電体
(7)(8)に接触して電流が流れる部分は、従来と同じ厚さ
のままであるから、電気抵抗は大きくなっておらず、従
来のものに比べると、電解特性は不変で、イオン交換膜
(4) の強度だけを上げることができる。According to the above construction, since the portion of the ion exchange membrane (4) that contacts the O-ring gasket (24) is reinforced, the O-ring gasket (24) of the ion exchange membrane (4) is reinforced.
Even if the outer part is in a dry state and the inner part is in a swelling state, even if a large stress is generated at the periphery of the ion exchange membrane (4), the ion exchange membrane (4) is not damaged. Feeder
(7) Since the portion where the current flows in contact with (8) remains the same thickness as the conventional one, the electrical resistance has not increased, and the electrolytic properties are unchanged compared to the conventional one, Exchange membrane
Only the strength of (4) can be increased.
【００１２】実施例 イオン（カチオン）交換膜本体(4a)を、縦１２５０ｍ
ｍ，横３５０ｍｍ、厚み０．１ｍｍとし、その周縁部分
を、幅２５ｍｍ、厚み０．２ｍｍの同種のカチオン交換
膜(39)により補強し、カチオン交換膜本体(4a)の中央部
分（縦９１０ｍｍ，横２３０ｍｍ）をブラスト処理し、
これに公知の方法（特公平２−２０７０９号公報参照）
により、白金・イリジウムメッキを行って、固体高分子
電解質膜(3) を形成し、こうして得られた固体高分子電
解質膜(3) を備えた構成で１０組のセル電解槽モジュー
ルに組み立てたところ、イオン交換膜(4) の破損は全く
起こらなかった。EXAMPLE An ion (cation) exchange membrane main body (4a) was vertically extended to 1250 m.
m, 350 mm in width and 0.1 mm in thickness, and the peripheral portion thereof is reinforced by the same type of cation exchange membrane (39) having a width of 25 mm and a thickness of 0.2 mm. Blast processing 230mm in width)
A known method (see Japanese Patent Publication No. 2-20709)
By, doing a platinum-iridium-plated, solid polymer
An electrolyte membrane (3) is formed, and the solid polymer
Kaishitsu film (3) was assembled in 10 pairs of cell electrolyser module configuration including the breakage of the ion exchange membrane (4) did not occur at all.
【００１３】[0013]
【発明の効果】本発明の水電解槽によると、イオン交換
膜のうちシール部材に接触する部分が、補強イオン交換
膜層が圧着されることにより補強されているので、イオ
ン交換膜のシール部材より外側の部分が乾燥状態、同内
側の部分が膨潤状態となって、イオン交換膜の周縁部に
大きい応力が生じても、イオン交換膜の破損が起こらな
い。According to the water electrolysis tank of the present invention, the portion of the ion exchange membrane that comes into contact with the sealing member is formed by the reinforcing ion exchange.
Since the membrane layer is reinforced by being pressed, the portion outside the seal member of the ion exchange membrane is in a dry state and the inside portion is in a swelling state, and a large stress is generated at the peripheral portion of the ion exchange membrane. However, the ion exchange membrane is not damaged.
【図面の簡単な説明】[Brief description of the drawings]
【図１】この発明のフィルタープレス式水電解槽の要部
の断面図である。FIG. 1 is a sectional view of a main part of a filter press type water electrolysis tank of the present invention.
【図２】同分解斜視図である。FIG. 2 is an exploded perspective view of the same.
【図３】従来のフィルタープレス式水電解槽の分解状態
を示す分解斜視図である。FIG. 3 is an exploded perspective view showing a disassembled state of a conventional filter press type water electrolysis tank.
【図４】同要部の断面図である。FIG. 4 is a cross-sectional view of the main part.
【符号の説明】 １：陽極主電極 ２：陰極主電極 ３：電極接合体膜 ４：イオン交換膜 4a：イオン交換膜本体 ５：陽極側触媒電極層 ６：陰極側触媒電極層 ７：陽極給電体 ８：陰極給電体 ９：複極板 ２４：Ｏリングガスケット（シール部材） ３９：補強イオン交換膜[Description of Signs] 1: Anode main electrode 2: Cathode main electrode 3: Electrode assembly membrane 4: Ion exchange membrane 4a: Ion exchange membrane main body 5: Anode side catalyst electrode layer 6: Cathode side catalyst electrode layer 7: Anode power supply Body 8: Cathode feeder 9: Double electrode plate 24: O-ring gasket (seal member) 39: Reinforced ion exchange membrane
───────────────────────────────────────────────────── フロントページの続き (71)出願人 000001144 工業技術院長 東京都千代田区霞が関１丁目３番１号 (74)上記１名の指定代理人 工業技術院大阪工業技術研 究所長 （外５名） (72)発明者 稲住 近 東京都港区西新橋２丁目８番11号 第７東 洋海事ビル 財団法人地球環境産業技術研 究機構 ＣＯ２ 固定化等プロジェクト室 内 (72)発明者 近藤 雅芳 東京都港区西新橋２丁目８番11号 第７東 洋海事ビル 財団法人地球環境産業技術研 究機構 ＣＯ２ 固定化等プロジェクト室 内 (72)発明者 梶山 浩志 東京都港区西新橋２丁目８番11号 第７東 洋海事ビル 財団法人地球環境産業技術研 究機構 ＣＯ２ 固定化等プロジェクト室 内 (72)発明者 小黒 啓介 大阪府池田市緑丘１丁目８番31号 工業技 術院大阪工業技術研究所内 ──────────────────────────────────────────────────続 き Continuing from the front page (71) Applicant 000001144 Director, Industrial Technology Research Institute 1-3-1 Kasumigaseki, Chiyoda-ku, Tokyo (74) Designated agent of the above-mentioned one Director of Osaka Institute of Technology, Institute of Industrial Technology (72) Inventor Chika Inazumi 7th Toyo Maritime Building, 2-8-11 Nishi-Shimbashi, Minato-ku, Tokyo Inside the CO2 fixation project room, etc. (72) Inventor Masayoshi Kondo Tokyo 2-8-11 Nishi-Shimbashi, Minato-ku, Tokyo 7th Toyo Maritime Building CO2 Fixation Project Office, Research Organization for Environmental Science and Technology (72) Inventor Hiroshi Kajiyama 2--8, Nishi-Shimbashi, Minato-ku, Tokyo No.11 The 7th Toyo Maritime Building In the CO2 fixation project room, etc. (72) Inventor Keisuke Oguro 1-8-31 Midorioka, Ikeda-shi, Osaka Inside the Osaka Institute of Technology
Claims (2)
極主電極(2) と、これら主電極(1) (2) の間に直列に配
された複数の単位セルと、これらを一体化する締め付け
具とを具備し、１つのセルは、チタン合金製の複極板
(9) の陽極側と、陽極給電体(7) と、電解用イオン交換
膜(4) およびその両面に設けられた触媒電極層(5) (6)
からなる電極接合体膜(3) と、陰極給電体(8) と、隣の
複極板(9) の陰極側からなり、複極板(9) の周縁部とイ
オン交換膜(4) の周縁部との間にシール部材(24)が介在
されている水電解槽において、イオン交換膜(4) のシー
ル部材(24)に接する部分に補強層(39)が設けられている
ことを特徴とする、固体高分子電解質膜を用いる水電解
槽。An anode main electrode (1) and a cathode main electrode (2) arranged at both ends, a plurality of unit cells arranged in series between the main electrodes (1) and (2), and One cell is a titanium alloy double pole plate
The anode side of (9), the anode feeder (7), the ion exchange membrane for electrolysis (4) and the catalyst electrode layers (5) (6) provided on both surfaces thereof
Consisting of an electrode assembly membrane (3), a cathode power feeder (8), and a cathode side of an adjacent bipolar plate (9) .The periphery of the bipolar plate (9) and the ion exchange membrane (4) In a water electrolysis tank in which a sealing member (24) is interposed between the sealing member (24) and a peripheral portion, a reinforcing layer (39) is provided at a portion of the ion exchange membrane (4) in contact with the sealing member (24). A water electrolysis tank using a solid polymer electrolyte membrane.
に白金とイリジウムの無電解メッキを施すことにより形
成されている請求項１記載の固体高分子電解質膜を用い
る水電解槽。2. The method according to claim 1, wherein the electrode assembly membrane (3) is an ion exchange membrane (4).
2. A water electrolysis tank using the solid polymer electrolyte membrane according to claim 1, wherein the water electrolysis tank is formed by applying electroless plating of platinum and iridium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10057661A JP2961228B2 (en) | 1998-03-10 | 1998-03-10 | Water electrolyzer using solid polymer electrolyte membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10057661A JP2961228B2 (en) | 1998-03-10 | 1998-03-10 | Water electrolyzer using solid polymer electrolyte membrane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11256378A true JPH11256378A (en) | 1999-09-21 |
| JP2961228B2 JP2961228B2 (en) | 1999-10-12 |
Family
ID=13062095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10057661A Expired - Lifetime JP2961228B2 (en) | 1998-03-10 | 1998-03-10 | Water electrolyzer using solid polymer electrolyte membrane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2961228B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002241979A (en) * | 2001-02-19 | 2002-08-28 | Hitachi Zosen Corp | Solid polymer type water electrolytic cell |
| JP2007270292A (en) * | 2006-03-31 | 2007-10-18 | Daido Metal Co Ltd | Solid polymer membrane type water electrolyzer |
| JP2012206110A (en) * | 2011-03-17 | 2012-10-25 | Masaaki Arai | Electrolytic water production device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08260177A (en) * | 1995-03-23 | 1996-10-08 | Agency Of Ind Science & Technol | Water electrolytic cell using solid high molecular electrolyte membrane |
| JPH09157877A (en) * | 1995-12-01 | 1997-06-17 | Shinko Pantec Co Ltd | Hydrogen and oxygen generator |
| JPH1025585A (en) * | 1996-07-09 | 1998-01-27 | Shinko Pantec Co Ltd | Electrical connecting mechanism of electrolytic cells to each other |
-
1998
- 1998-03-10 JP JP10057661A patent/JP2961228B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08260177A (en) * | 1995-03-23 | 1996-10-08 | Agency Of Ind Science & Technol | Water electrolytic cell using solid high molecular electrolyte membrane |
| JPH09157877A (en) * | 1995-12-01 | 1997-06-17 | Shinko Pantec Co Ltd | Hydrogen and oxygen generator |
| JPH1025585A (en) * | 1996-07-09 | 1998-01-27 | Shinko Pantec Co Ltd | Electrical connecting mechanism of electrolytic cells to each other |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002241979A (en) * | 2001-02-19 | 2002-08-28 | Hitachi Zosen Corp | Solid polymer type water electrolytic cell |
| JP2007270292A (en) * | 2006-03-31 | 2007-10-18 | Daido Metal Co Ltd | Solid polymer membrane type water electrolyzer |
| JP2012206110A (en) * | 2011-03-17 | 2012-10-25 | Masaaki Arai | Electrolytic water production device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2961228B2 (en) | 1999-10-12 |
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