JP2007084907A - Cubic electrode for electrolysis, and ion exchange membrane electrolytic cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrode for electrolysis, which can be easily produced and has high strength and toughness. <P>SOLUTION: In the cubic electrode 15, a plurality of cut parts 12 formed at a planar metal electrode substrate 11 are bent in the same direction with respect to the electrode substrate. The cubic electrode having high strength and toughness can be provided only by bending the formed plurality of cut parts, and, when the cubic electrode is used in an ion exchange membrane electrolytic cell, the positional relation between mutual members is made stable, thus caustic soda or the like can be produced at high efficiency without mechanically damaging an ion exchange membrane or the like and without excessively deforming the same nor making power supply insufficient. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a solid electrode for electrolysis formed with an elastic conductor and an ion exchange membrane electrolytic cell using the solid electrode.

The electrolytic industry represented by chloralkali electrolysis plays an important role as a material industry. Although having such an important role, the energy consumption required for chloralkali electrolysis is large, and in countries with high energy costs such as Japan, there is a strong demand for achieving energy saving.
For example, chloralkali electrolysis has been converted from the mercury method to the ion exchange membrane method through the diaphragm method in order to achieve environmental conservation as well as solving environmental problems, and has achieved energy saving of about 40% in about 25 years. . However, even this energy saving is not enough, and the power cost of energy accounts for about half of the total manufacturing cost, but no further power savings are possible using the current method.

In the electrolytic cell equipped with a hydrogen generating cathode used for salt electrolysis, the anode, ion exchange membrane and hydrogen generating cathode are arranged in close contact to reduce the electrolysis voltage, but the electrolysis area reaches several square meters. In a large electrolytic cell, when the anode and the cathode are formed of a rigid member, it is difficult to keep both electrodes in close contact with the ion exchange membrane and maintain the electrode spacing at a predetermined value.
An electrolytic cell using an elastic material is known as a means for reducing the distance between electrodes or the distance between an electrode and an electrode current collector or maintaining it at a substantially constant value.
As this elastic material, non-rigid materials such as metal woven fabrics, nonwoven fabrics, and nets, and rigid materials such as leaf springs are known.

The non-rigid material is partially deformed when it is excessively pressed from the counter electrode after being attached to the electrolytic cell, resulting in non-uniform distance between the electrodes, or the thin wire of the non-rigid material pierces the ion exchange membrane. There is.
Also, in an ion exchange membrane electrolytic cell such as a salt electrolytic cell, it is desirable that the anode and the cathode be in close contact with the ion exchange membrane so that the operation can be continued at a low voltage, and there are various methods for pressing the electrode in the direction of the ion exchange membrane. Proposed.

Japanese Patent Publication No. 63-53272 (FIGS. 1 to 8) JP 2004-300543 A

As described above, the structural characteristics of the electrolytic cell in which the ion exchange membrane is sandwiched between the positive and negative electrodes are that the electrode is uniformly adhered to the ion exchange membrane to prevent damage to the ion exchange membrane and between the positive and negative electrodes. In order to keep the distance to a minimum, at least one of the electrodes can be moved freely in the inter-electrode distance direction, and the electrode can be pushed by an elastic member to adjust the clamping pressure.
Elastic members include knitted or woven fabrics made of metal wires or laminates of these, or shapes that are three-dimensionally knitted or three-dimensionally knitted and then swelled, etc., and metal fibers There are non-woven fabrics, coil springs (springs), leaf springs, etc., all of which have some spring elasticity.

On the other hand, in an industrial electrolytic cell such as a salt electrolytic cell, a leaf spring or a metal mesh may be used in order to smoothly supply power from the electrode current collector to the electrode.
However, as described above, since the leaf spring and the metal net are rigid bodies, the ion exchange membrane may be damaged, the deformation rate may be small, and sufficient electrical connection may not be obtained.
In order to eliminate such drawbacks, an electrolytic cell is disclosed in which a metallic coil is mounted between a cathode and a cathode end plate in place of a metal mesh, and the cathode is uniformly pressed in the direction of the diaphragm and the members are brought into close contact with each other. (Patent Document 1).

Since this metallic coil has a very small wire diameter and a high deformation rate, each member can be brought into close contact with each other, and a stable electrolytic cell can be operated.
However, in the electrolytic cell described in Patent Document 1, since the metallic coil is installed in the electrolytic cell in addition to the anode or the cathode, the number of parts increases, and sufficient adhesion can be obtained when the cathode is a rigid body. There is a disadvantage that there is not.

  In order to eliminate such drawbacks, an electrode composed of a metallic coil carrying an electrode catalyst or an electrode configured by winding the metallic coil around a corrosion-resistant frame has been proposed (Patent Document 2). This technique is characterized in that the metallic coil is not used in such a manner that the electrode is pressed in the direction of the ion exchange membrane, but is used as the electrode itself. This electrode is maintained in its form for a long time due to its high strength and toughness, so that the ion exchange membrane or the like is not mechanically damaged, and may be excessively deformed to cause insufficient power supply. And has the advantage of being able to produce caustic soda and the like with high efficiency. However, although the electrode has such great advantages, there is a disadvantage that it takes time to manufacture.

  An object of the present invention is to provide a three-dimensional electrode for electrolysis in which the disadvantages of the prior art are eliminated and an ion exchange membrane electrolytic cell using the same.

  According to the present invention, first, a plurality of cuts are formed in a plate-shaped metal electrode substrate carrying an electrode catalyst, and the cut portions are bent in the same direction with respect to the electrode substrate to form an elastic conductor. Secondly, in an ion exchange membrane electrolytic cell partitioned into an anode chamber containing an anode and an anode chamber containing a cathode by an ion exchange membrane, at least one of the anode and the cathode Is a three-dimensional electrode in which an elastic conductor is formed by bending a plurality of cut portions formed in a plate-shaped metal electrode base supporting an electrode catalyst in the same direction with respect to the electrode base, and the metal electrode of the three-dimensional electrode An ion exchange membrane electrolytic cell characterized in that a substrate is in close contact with an ion exchange membrane, and the elastic conductor is in contact with an electrode current collector.

The present invention will be described in detail below.
In the three-dimensional electrode of the present invention, the plurality of cut portions formed in the plate-shaped metal electrode base are bent in the same direction with respect to the electrode base to form an elastic conductor. The bending angle (θ) can be set in an arbitrary range of 0 ° <θ <180 °, preferably 10 ° to 90 °, more preferably 30 ° to 80 °.
When an elastic conductor formed by bending the cut portion is installed so as to be pressed inward between, for example, an ion exchange membrane and an electrode current collector, the elastic conductor obtains elasticity, and the ion exchange membrane And the electrode current collector.

This eliminates the need to install an elastic member other than the electrode in the electrolytic cell. In addition to the function as an electrode, the electrode is elastically pressed against an ion exchange membrane, etc., thereby, for example, ion exchange with the electrode. The effect is that the film adheres uniformly. Moreover, since the elastic conductor that generates elasticity does not contact the ion exchange membrane, the ion exchange membrane is not damaged.
Further, when the bent tip portions of the plurality of elastic conductors that are present are brought into contact with or welded to the electrode current collector, the same power supply paths as the number of the elastic conductors can be secured.
In addition, unlike the case where a normal perforated plate is used as the electrode substrate, the elastic conductor itself has an electrode function, so that the effective electrode area does not decrease.

The electrode base of the three-dimensional electrode of the present invention is preferably made of nickel, nickel alloy, stainless steel, or copper alloy showing good corrosion resistance and a metal having a low specific resistance obtained by electroless nickel plating on the entire surface. The electrode substrate may be a non-porous sheet or may be porous such as expanded metal.
The electrode base is supported on the electrode substrate by disperse-plating a Raney nickel catalyst with nickel.
The cut portion is preferably formed in a rectangular (strip) shape, but can be any shape such as a square, semi-circular shape, a tapered trapezoidal shape, or a tapered trapezoidal shape. The plurality of cut portions may be randomly formed on the electrode substrate, but are preferably formed by being aligned vertically and horizontally.
The formation ratio of the cut portion to the total surface area of the electrode substrate is preferably 5 to 60%, and more preferably 15 to 30%. If it is less than 5%, elasticity and conductivity may be insufficient. If it exceeds 60%, the strength of the entire electrode is insufficient, or the ratio of elastic conductors that are separated from the ion exchange membrane increases so that the resistance value increases. Energy loss may occur.
The surface of the electrode substrate after the formation of the elastic conductor may be smooth, but knurling, louvering, corrugated (corrugated) processing or the like can also be performed.

The electrolytic reaction in the ion exchange membrane electrolytic cell of the present invention is preferably a reaction for producing alkali hydroxide (caustic soda) by chloralkali (sodium chloride) electrolysis, but any reaction that can use the aforementioned three-dimensional electrode as an electrode. There is no particular limitation.
When the three-dimensional electrode of the present invention is accommodated in the ion exchange membrane electrolytic cell, as described above, it is pressed inward between the ion exchange membrane and the electrode current collector (usually a three-dimensional electrode including an elastic conductor by the electrode current collector). Is pressed against the ion exchange membrane), elasticity is applied to the three-dimensional electrode, and for example, the three-dimensional electrode is brought into close contact with the ion-exchange membrane.
As the ion exchange membrane, a perfluoro cation exchange membrane having a carboxylic acid or sulfonic acid used in current ion exchange membrane type salt electrolysis or the like, or a complex acid of both, as an ion exchange group can be used.

  In order to perform, for example, salt electrolysis using the ion exchange membrane electrolytic cell having such a configuration, current is supplied between the two electrodes while supplying a salt solution to the anode chamber and a diluted caustic soda solution to the cathode chamber. Due to the high strength and toughness of the three-dimensional electrode, the positional relationship between the members is stabilized, so that the ion exchange membrane or the like is not mechanically damaged or excessively deformed, resulting in insufficient power supply. No caustic soda can be produced with high efficiency.

The three-dimensional electrode of the present invention can be manufactured simply by forming a plurality of cut portions in a plate-like metal electrode base and bending the cut portions in the same direction to form an elastic conductor. In addition, elasticity is imparted to the entire electrode by the elastic conductor and it functions as a high-strength and tough electrode.
The ion exchange membrane electrolytic cell equipped with this three-dimensional electrode can perform smooth electrolysis with the positional relationship between the members stabilized by the high strength and toughness of the three-dimensional electrode.

Next, a three-dimensional electrode of the present invention and an ion exchange membrane electrolytic cell equipped with the three-dimensional electrode will be described based on examples shown in the accompanying drawings.
FIG. 1a is a partially broken perspective view showing an electrode substrate in which a cut portion is formed, FIG. 1b is a partially broken perspective view of a three-dimensional electrode in which an elastic conductor is formed by bending the cut portion of FIG. 1a, and FIG. FIG. 3 is a perspective view showing the flow of electricity in the cathode chamber of the ion exchange membrane electrolytic cell shown in FIG. 2.

As shown in FIG. 1a, in a non-porous plate-like metal electrode base 11, in the illustrated example, three rectangular cut portions 12 facing the same direction are formed in a row, and a total of 15 examples of 5 in a row. The notches 12 in adjacent rows are formed so as to face in opposite directions.
Next, each cut portion 12 is bent in the same direction with respect to the electrode substrate 11, and in the illustrated example, is bent toward the lower side of the electrode substrate 11 to form the elastic conductor 13, and the tip portion of each elastic conductor 13 is A connection piece 14 is formed by bending in parallel with the electrode base 11 to form a solid electrode unit 15 having a total of 15 elastic conductors 13 (FIG. 1b).

The ion exchange membrane electrolytic cell 16 shown in FIG. 2 shows an example in which the three-dimensional electrode unit 15 shown in FIG. 1B is used as an anode 17 and a cathode 18 as a set of three units. The three-dimensional electrode units 15 functioning as the anode 17 and the cathode 18 have their respective surface sides (sides where no elastic conductor is present) in close contact with the ion exchange membrane 19, and their respective short sides are adjacent to the three-dimensional electrode unit. A three-dimensional electrode is formed in contact with the short side of 15.
The ion exchange membrane electrolytic cell 16 has an anode current collector 22 and a cathode current collector 23 in an anode chamber 20 and a cathode chamber 21, respectively. A contact portion between the adjacent solid electrode unit 15 on the anode 17 side and the anode current collector 22 are connected by a first anode power supply plate 24, and a contact portion between the adjacent solid electrode unit 15 on the cathode 18 side and the cathode The current collectors 23 are connected by a first cathode power supply plate 25.

  Furthermore, the first anode power supply plates 24 are electrically connected to each other by a second anode power supply plate 26, and the connection pieces 14 of all the anode-side three-dimensional electrodes 15 are electrically connected to the second anode power supply plate 26 to be elastic. An external force is applied to the conductor 13 in the direction of the ion exchange membrane 19. Further, the first cathode power supply plates 25 are electrically connected to each other by a second cathode power supply plate 27, and the connection pieces 14 of all the cathode side three-dimensional electrodes 15 are electrically connected to the second cathode power supply plate 27, and are elastic. An external force is applied to the conductor 13 in the direction of the ion exchange membrane 19.

When saline is supplied to the anode chamber 20 of the ion-exchange membrane electrolytic cell 16 and current is supplied while supplying the diluted caustic soda aqueous solution to the cathode chamber 21, a concentrated caustic soda aqueous solution is obtained in the cathode chamber.
At this time, the elastic conductor 13 of each three-dimensional electrode unit 15 imparts elasticity to the entire electrode and functions as a high-strength and tough electrode, thus enabling stable operation for a long period of time. Moreover, as shown in FIG. 3, on the cathode side (the anode side is omitted, power is supplied in the same manner), power is directly supplied from the cathode power supply 23 to the contact portion of the adjacent three-dimensional electrode unit 15 through the first cathode power supply plate 25. In addition, the current supplied to the first cathode power supply plate 25 branches to the second cathode power supply plate 27, and each three-dimensional electrode passes through the connection piece 14 and the elastic conductor 13 connected to the second cathode power supply plate 27. Power is supplied to 15 surfaces. Therefore, there are many power supply paths, and reliable power supply can be achieved.

The three-dimensional electrode or the three-dimensional electrode unit of the present invention is not limited to the one shown in FIG. 1b, and various modifications shown in FIGS. 4 to 11 are possible. In FIGS. 4 to 11, the same members as those in FIGS.
A first modification of FIG. 4 is a three-dimensional electrode 15a having an electrode base 11a in which cut portions 12a between parallel rows are formed in a staggered manner unlike FIG. 1a.
The second modification of FIG. 5 uses a porous electrode substrate 11b such as expanded metal, unlike the non-porous electrode substrate of FIG. 1a.
Although illustration is omitted, it is also possible to form cut portions in a staggered manner in the porous electrode substrate.

The third modification of FIG. 6 is an electrode base body 11c that is plastically deformed so that louver-like slopes 32 are generated between the cut portions 12 of the three-dimensional electrode unit 15 of FIG. 1b and at both ends of the rectangular portion 31 outside the cut portion 12. It is.
The fourth modification of FIG. 7 is an electrode base 11d that is plastically deformed so that louver-like slopes 32 are generated between the cut portions 12 of the three-dimensional electrode unit 15 of FIG. 4 and at both ends of the rectangular portion 31 outside the cut portion 12. It is an example.
Although not shown, the porous electrode substrate may be plastically deformed so that a louver-like slope 32 is generated.

The fifth modification example of FIG. 8 relates to the improvement of the third modification example of FIG. 6, and not only causes the louver-like inclination 32 at both ends of the rectangular part 31 but also the base part and the cut part of the elastic conductor 13. This is an example of an electrode substrate 11e that is plastically deformed so that a louver-like slope 33 is formed at one end of 12 so as to be opposite to the louver-like slope 32.
Although not shown in the figure, the electrode base having a porous electrode base or a staggered cut may be plastically deformed so that louvered slopes 32 and 33 are generated.

The sixth modification of FIG. 9 is an example in which an electrode substrate 11f that is knurled in addition to the elastic conductor 13 and the connecting piece is used instead of the electrode substrate of FIG. 1a.
Although illustration is omitted, knurling may be applied to a porous electrode substrate or an electrode substrate having staggered cuts.

The seventh modification of FIG. 10 is an example of an electrode substrate 11g in which a large number of small-diameter chevron protrusions 34 are bonded in addition to the elastic conductor 13 and the connecting piece of the electrode substrate of FIG. 1b.
Although not shown, the chevron 34 may be bonded to a porous electrode substrate or an electrode substrate having a staggered cut.

The eighth modified example of FIG. 11 is an example of an electrode substrate 11h that has been subjected to corrugated processing instead of the knurling processing of FIG.
Although illustration is omitted, the corrugated processing may be performed on the porous electrode substrate or the electrode substrate having the staggered cut portions.

  Next, examples of the three-dimensional electrode and the ion exchange membrane electrolytic cell according to the present invention will be described, but the examples do not limit the present invention.

[Example 1]
A unit ion exchange membrane electrolytic cell was assembled as follows.
The anode used was a low oxygen type DSE for a salt electrolytic cell manufactured by Permerek Electrode Co., Ltd. having an effective area of 1540 cm ² (width 11 cm × height 140 cm). This anode was attached to the anode chamber partition wall by welding using an anode rib.
In the cathode chamber, a cathode rib made of flat nickel was used, and an expanded metal cathode current collector in which an electroless nickel plating was applied to a copper alloy and a Raney nickel catalyst was dispersedly plated was attached to the cathode chamber partition. .

A copper alloy plate having a length of 110 mm, a width of 350 mm, and a thickness of 0.2 mm was used as the electrode substrate of the three-dimensional electrode unit. After this copper alloy plate was formed into an expanded metal mold, press working was performed to form 36 notches with a width of 2 mm and a length of 9 mm at a pitch of 5 mm, with six in one row. Thereafter, electroless nickel plating was applied to the entire surface of the copper alloy, and Raney nickel catalyst was dispersedly plated with nickel to carry the electrode catalyst.
Next, each of the cut portions was bent at an angle of about 45 ° in the same direction to obtain an elastic conductor, and the tip thereof was bent so as to be parallel to the electrode substrate to obtain a three-dimensional electrode unit.

The four three-dimensional electrode units were arranged side by side on the cathode current collector so as to be in contact with each other.
A cation exchange membrane (Flemion-F8020 manufactured by Asahi Glass Co., Ltd.) was placed between the anode and the cathode to assemble an ion exchange membrane electrolytic cell.
Electrolysis was performed under conditions of a current density of 40 A / dm ² and a temperature of 85 ° C. while supplying a saline solution of 302 g / liter to the anode chamber and a sodium hydroxide aqueous solution to the cathode chamber to a concentration of 32 wt%. . The electrolytic cell voltage was 2.949V.

[Example 2]
The anode and the anode chamber were configured in the same manner as in Example 1.
A cathode rib made of flat nickel was used in the cathode chamber, and a nickel expanded metal cathode current collector was attached to the cathode chamber partition.

A nickel plate having a length of 110 mm, a width of 350 mm, and a thickness of 0.2 mm was used as the electrode base of the three-dimensional electrode unit. This copper-nickel plate was formed into an expanded metal mold and then pressed to form 36 rows of 6 incisions with a width of 2 mm and a length of 9 mm at a pitch of 5 mm. Thereafter, Raney nickel catalyst was dispersedly plated with nickel on the nickel plate to carry the electrode catalyst.
Next, each of the cut portions was bent at an angle of about 45 ° in the same direction to obtain an elastic conductor, and the tip thereof was bent so as to be parallel to the electrode substrate to obtain a three-dimensional electrode unit.

The four three-dimensional electrode units were arranged side by side on the cathode current collector so as to be in contact with each other.
A cation exchange membrane (Flemion-F8020 manufactured by Asahi Glass Co., Ltd.) was placed between the anode and the cathode to assemble an ion exchange membrane electrolytic cell.
Electrolysis was performed under conditions of a current density of 40 A / dm ² and a temperature of 85 ° C. while supplying a saline solution of 304 g / liter to the anode chamber and a sodium hydroxide aqueous solution to the cathode chamber to a concentration of 32% by weight. It was. The electrolytic cell voltage was 2.942V.

[Example 3]
An ion exchange membrane electrolytic cell was assembled as follows.
As the cathode, an electrode having an effective area of 1540 cm ² (width 11 cm × height 140 cm), in which a Raney nickel catalyst was dispersed and plated with nickel on nickel expanded metal, was used. This cathode was attached to the cathode chamber partition of the electrolytic cell using cathode ribs.
An anode rib made of a flat titanium material was used in the anode chamber, and a titanium expanded metal anode current collector was attached to the anode chamber partition.

A titanium plate having a length of 110 mm, a width of 350 mm, and a thickness of 0.5 mm was used as the electrode base of the three-dimensional electrode unit. After this titanium was formed into an expanded metal mold, pressing was performed to form 36 notches of 6 mm in a row with a width of 2 mm and a length of 9 mm at a pitch of 5 mm. Thereafter, a RuO ₂ —TiO ₂ catalyst was supported on the entire surface of the titanium material by a thermal decomposition method.
Next, each of the cut portions was bent at an angle of about 45 ° in the same direction to obtain an elastic conductor, and the tip thereof was bent so as to be parallel to the electrode substrate to obtain a three-dimensional electrode unit (anode).

The four three-dimensional electrode units were arranged side by side on the anode current collector so as to be in contact with each other.
A cation exchange membrane (Flemion-F8020 manufactured by Asahi Glass Co., Ltd.) was placed between the anode and the cathode to assemble an ion exchange membrane electrolytic cell.
Electrolysis was performed under conditions of a current density of 40 A / dm ² and a temperature of 85 ° C. while supplying a saline solution of 302 g / liter to the anode chamber and a sodium hydroxide aqueous solution to the cathode chamber to a concentration of 32% by weight. It was. The electrolytic cell voltage was 2.940V.

[Example 4]
The unit ion exchange membrane electrolytic cell was assembled under the same conditions as in Example 3 except that the titanium plate, which is the electrode base of the three-dimensional electrode unit (anode), was used in the form of a flat plate without being formed into an expanded metal mold. It was.
Electrolysis was performed under conditions of a current density of 40 A / dm ² and a temperature of 85 ° C. while supplying a salt solution of 303 g / liter to the anode chamber and a sodium hydroxide aqueous solution to the cathode chamber to a concentration of 32 wt%. It was. The electrolytic cell voltage was 2.990V.

[Comparative example]
An ion exchange membrane electrolytic cell was assembled as follows using an electrode having no three-dimensional structure. As the cathode, an electrode having an effective area of 1540 cm ² (width 11 cm × height 140 cm), in which a Raney nickel catalyst was dispersed and plated with nickel on nickel expanded metal, was used. The cathode was attached to the cathode chamber partition wall of the electrolytic cell by welding using a cathode rib.
The anode used was a low oxygen type DSE for a salt electrolytic cell manufactured by Permerek Electrode Co., Ltd. having an effective area of 1540 cm ² (width 11 cm × height 140 cm). This anode was attached to the anode chamber partition wall by welding using an anode rib.
A cation exchange membrane (Flemion-F8020 manufactured by Asahi Glass Co., Ltd.) was placed between the anode and the cathode to assemble an ion exchange membrane electrolytic cell.
Electrolysis was performed under conditions of a current density of 40 A / dm ² and a temperature of 85 ° C. while supplying a saline solution of 304 g / liter to the anode chamber and a sodium hydroxide aqueous solution to the cathode chamber to a concentration of 32% by weight. It was. The electrolytic cell voltage was 3.185V.

FIG. 1a is a partially broken perspective view showing an electrode substrate in which a cut portion is formed, and FIG. 1b is a partially broken perspective view of a three-dimensional electrode in which an elastic conductor is formed by bending the cut portion of FIG. 1a. It is a partial cross-sectional top view of the ion exchange membrane electrolyzer equipped with the three-dimensional electrode of FIG. 1b. It is a perspective view which shows the flow of the electricity in the cathode chamber of the ion exchange membrane electrolytic cell of FIG. It is a 1st modification of an electrode base | substrate. It is a 2nd modification of an electrode base | substrate. It is a 3rd modification of an electrode base | substrate. It is a 4th modification of an electrode base | substrate. It is a 5th modification of an electrode base | substrate. It is a 6th modification of an electrode base | substrate. It is a 7th modification of an electrode base | substrate. It is an 8th modification of an electrode base | substrate.

Explanation of symbols

  11, 11 a to 11 h ...... Electrode base 12 ...... Cut portion 13 ...... Elastic conductor 14 ...... Connection piece 15, 15 a ...... Solid electrode (unit) 16 …… Ion exchange membrane electrolytic cell 17 …… Anode 18 …… Cathode 19 ... Ion exchange membrane 20 ... Anode chamber 21 ... Cathode chamber 22 ... Anode current collector 23 ... Cathode current collector 24 ... First anode power supply plate 25 ... First cathode power supply plate 26 ... Second anode power supply plate 27 …… Second cathode power supply plate 31 …… Rectangular part 32, 33 …… Inclined 34 …… Mount projection

Claims (4)

  A three-dimensional electrode for electrolysis characterized in that a plurality of cuts are formed in a plate-shaped metal electrode substrate carrying an electrode catalyst, and the cut portions are bent in the same direction with respect to the electrode substrate to form an elastic conductor. .   The three-dimensional electrode according to claim 1, wherein the tip of the elastic conductor is bent so as to be parallel to the electrode substrate.   The three-dimensional electrode according to claim 1, wherein the ratio of the total cut-in area to the electrode substrate area is 5 to 60%.   In an ion exchange membrane electrolytic cell partitioned into an anode chamber containing an anode and an anode chamber containing a cathode by an ion exchange membrane, at least one of the anode and the cathode is formed on a plate-like metal electrode substrate carrying an electrode catalyst A solid electrode in which a plurality of cut portions are bent in the same direction with respect to the electrode substrate to form an elastic conductor, the metal electrode substrate of the three-dimensional electrode is in close contact with the ion exchange membrane, and the elastic conductor is an electrode An ion exchange membrane electrolytic cell characterized by being in contact with a current collector.

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