KR20110107600A - Water electrolysis system - Google Patents

Abstract

Electrolytic cell; And an electrolysis cell disposed in the electrolytic cell, wherein the electrolysis cell is spaced apart from each other to face each other, and a pair of cathodes and anodes disposed to face each other between the pair of frames; An ion exchange membrane disposed between the cathode and the anode; A non-woven fabric disposed between at least one of the cathode and the frame on one side opposite thereto and between the anode and the frame on the other side opposite thereto, wherein the anode and the cathode are electrode plates including a current collector and a non-current collector. A decomposition device is provided.

Description

Water electrolysis system

A water electrolysis apparatus including an electrolytic cell and an electrolysis cell disposed in the electrolytic cell is disclosed, and more specifically, the production of alkaline ionized water and acidic water by facilitating gas generation during water electrolysis and increasing the electrolysis efficiency of the electrode. Disclosed is a water electrolysis device that maximizes efficiency.

As the industry develops, the water quality of rivers and lakes is gradually contaminated by the sewage of domestic sewage and large factories, and the pollution such as fish cannot live due to such water pollution and the tap water must be produced through complicated purification steps. Is springing up.

Accordingly, in a large plant, various water purification methods are used to purify and drain the polluted water during the discharge of waste water, and in the home, tap water is not directly drinking, but water is purified once more using a water purifier. The electrolysis device has recently been spotlighted as a method for purifying waste water and purifying drinking water.

In general, an electrolysis device is provided with at least one pair of electrode plates forming a cathode and an anode in a conventional electrolytic cell, and supplies electricity to each electrode plate to electrolyze a substance contained in the water in the electrolytic cell. Such an electrolysis device can be classified into a diaphragm type having a diaphragm between a cathode and an anode according to the presence or absence of a diaphragm, and a non-diaphragm type without a diaphragm. It can be classified into an upright or monopolar type and a horizontal or bipolar type in which a plurality of electrode pairs are arranged horizontally. Representative examples of the diaphragm type include ion water groups, and examples of the non-diaphragm type include sodium hypochlorite generators used for disinfection and deodorization by generating sodium hypochlorite.

The non-diaphragm type sodium hypochlorite generator electrolyzes salt in the brine by using direct current electrodes added to both sides of the dilute brine through a series of electrodes (anode and cathode) without a diaphragm. The brine introduced into the electrolysis device is dissociated into sodium ions and chlorine ions so that the chlorine ions are oxidized at the anode to chlorine, and the sodium ions are reduced to the cathode to produce sodium, and the resulting sodium reacts with water to form sodium hydroxide and After hydrogenation, the chlorine produced at the anode reacts with the sodium hydroxide to produce sodium hypochlorite.

Sodium hypochlorite is generally used for water purification plant, sterilizer in sewage treatment plant, cooling water boiler in general chemical plant, desalination process water, cooling water treatment in power plant, drinking water treatment, plants and vegetables, meat processing, off-pool washing and papermaking, household bleach Used as

On the other hand, the ionizer has a water purifier and an electrolytic cell, and the water purifier purifies the water which has flowed in, and the electrolytic cell generates acidic ionized water and alkaline ionized water through electrolysis. The electrolytic cell is divided into an anode chamber and a cathode chamber by a diaphragm that can pass only ions having electrical properties. When voltage is applied thereto, ionized water is generated as the water is electrolyzed. The alkaline ionized water thus produced is used for beverages, and the acidic ionized water is used for skin care or disinfectant water. In particular, the alkaline ionized water for beverages has a hexagonal ring structure by electrolysis, which is excellent in maintaining health.

Korean Laid-Open Patent Publication No. 2002-0046259 is a method of sterilizing by injecting ozone gas into a purified water storage tank. The problem of leaving ozone odor (such as fishy smell) when drinking purified water and a blower (compressor) for blowing ozone gas into the tank Injecting airborne pollutants together creates another problem.

On the other hand, both methods of sterilization using the UV lamp or ozone do not have residual sterilizing power, and there is a problem in that a risk of microorganisms is generated after purified water is stored for a long time.

In addition, Korean Laid-Open Patent Publication No. 1997-0020966 has a sterilization treatment tank using a ferrite electrode, and Japanese Patent Application No. 50-60854 installs a ferrite rod in a round pipe made of iron or stainless steel, and performs electrolytic action between the ferrite rod and the pipe. By sterilizing the water, these methods have a problem that rust and condensation occurs due to the nature of the ferrite material has a problem that is difficult to apply to drinking water.

In addition, Korean Utility Model Publication No. 0317827 uses a cathode as a platinum electrode and a cathode as a silver electrode to induce sterilization of microorganisms present in water during the electrolysis of silver components, which move to the platinum electrode and adhere to the surface thereof. How to do is presented. However, if silver is released into the water and absorbed with water, it may harm health like other heavy metals. If silver is used in water by filter or other method, it must be approved by EPA. .

However, such an electrolysis device, the electric force is weak when the distance from the electrode plate forming the positive electrode and the negative electrode is not properly performed electrolysis. Accordingly, the distance between the electrode plates and the surface area of the electrode plates serve as an important factor in determining the efficiency of electrolysis. However, in the conventional electrolysis apparatus, since the size of the positive electrode plate and the negative electrode plate is determined according to the size of the electrolytic cell, there is a blind spot that the electrolysis efficiency is determined according to the size of the electrolytic cell.

Accordingly, there is a need to increase the surface area by modifying the shape of the electrode plate so as to improve the electrolysis efficiency regardless of the size of the electrolytic cell.

One aspect of the present invention is to provide a water electrolysis device to improve the electrolysis efficiency of the electrolysis cell by increasing the active area of the electrode plate to solve the above problems.

According to one aspect of the invention,

Electrolytic cell; And an electrolysis cell disposed in the electrolytic cell, wherein the electrolysis cell is spaced apart from each other to face each other, and a pair of negative electrodes and anodes disposed to face each other between the pair of frames; An ion exchange membrane disposed between the cathode and the anode; A non-woven fabric disposed between at least one of the cathode and the frame on one side opposite thereto and between the anode and the frame on the other side opposite thereto, wherein the anode and the cathode are electrode plates including a current collector and a non-current collector. A decomposition device is provided.

The nonwoven can have an embossed surface.

According to another aspect of the invention,

Electrolytic cell; And an electrolysis cell disposed in the electrolytic cell,

A pair of frames in which the electrolysis cells are spaced apart from each other, a pair of cathodes and anodes disposed to face each other between the pair of frames; An ion exchange membrane disposed between the cathode and the anode; The positive electrode and the negative electrode is an electrode plate including a current collector and a non-current collector, a water electrolysis device is provided that the sum of the circumferential length of the non-current collector per unit area (cm ⁻¹ ) of the electrode plate is 50 to 150.

The electrode plate may include an electrode active portion, an electrically applied portion extending from the electrode active portion and connected to a power source, and an insulating polymer coating layer positioned on a connection portion between the electrode active portion and the electrically applied portion.

The insulating polymer is silicone, urethane, ABS, rayon, polytetrafluoroethylene, fluorinated ethylene propylene copolymer, polyether ketone, polybenzimidazole, polyphosphazine, or two of them. It can consist of a mixture of phases.

The electrode plate may have a surface on which pores or irregularities are formed.

The electrode plate is ruthenium (Ru, rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), platinum (Pt) or cerium (Ce), tin (Sn), tungsten (W), titanium ( It may be plated with one or more metals selected from the group consisting of Ti), molybdenum (Mo), iron (Fe), manganese (Mn), cobalt (Co) and nickel (Ni).

At least one of the electrode plate itself and the plated portion on the electrode plate may have a surface having pores or irregularities.

The frame may have a surface on which protrusions are formed.

The projection of the frame may be made of silicon, urethane, ABS, zirconium, rayon, or a mixture of two or more thereof.

According to the present invention, a nonwoven fabric is inserted between the frame and the electrode plate to increase adhesion between the electrode plate and the ion exchange membrane, or the electrode plate is formed of an electrode plate including a current collector and a non-current collector, and per unit area of the electrode plate. By increasing the active electrode surface area by adjusting the sum of the circumferential lengths of the non-current collectors (cm ⁻¹ ), the electrolysis efficiency of the electrolysis device is improved, and as a result, the sterilization and deodorization performance is improved, and the Production capacity can be increased to provide a water electrolysis device that can also impart health and beauty effects.

1 illustrates a water electrolysis device according to an embodiment of the present invention.
Figure 2 shows a water electrolysis device according to another embodiment of the present invention.
3 illustrates an electrode plate including a current collector and a non-current collector included in a water electrolysis apparatus according to an exemplary embodiment of the present invention.
4 is an enlarged view of a portion A of the electrode plate of FIG. 3.
5 is an enlarged view of a part of an electrode plate having pores and irregularities included in a water electrolysis apparatus according to an exemplary embodiment of the present invention.
Figure 6 illustrates an electrode plate included in the water electrolysis device according to an embodiment of the present invention.
7 and 8 illustrate a frame included in the water electrolysis device according to an embodiment of the present invention, respectively.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In the following description of the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Referring to FIG. 1, the water electrolysis apparatus 100 according to an embodiment of the present invention includes an electrolytic cell 101 and an electrolysis cell disposed in the electrolytic cell.

The electrolysis cell is a pair of frames 107, 108 spaced apart from each other, a pair of cathodes 102 and anodes 103 disposed to be spaced apart from each other between the pair of frames 107, 108. ); An ion exchange membrane 104 disposed between the cathode 102 and the anode 103; between the anode 103 and the frame 108 opposite to the anode 103 and the frame 107 opposite to the cathode 102. Non-woven fabrics 105 and 106 are disposed in at least one of the spaces between the anode and the cathode.

The electrolyzer 101 further includes an inlet pipe 121 through which water for electrolysis flows into the lower side, and an alkaline ionized water drain pipe 122 for discharging or discharging alkaline ionized water and acidic water generated during electrolysis, respectively, on both sides thereof. The acidic ionized water drain pipes 123 are connected to each other.

In the electrolyzer 101, as power is applied to the membrane provided between the cathode 102 and the anode 103, cations of mineral components such as calcium and magnesium in water adhere to the cathode, and chlorine, sulfuric acid, sulfur, etc. Negative ions become attached to the positive electrode.

At the same time, the anode receives hydroxyl ions (OH-) on the cathode side and becomes oxygen molecules (O₂) and is blown off into the air, which increases the hydroxyl ions and makes the water acidic, while the cathode has hydrogen ions (H ⁺ ) on the anode side. The water becomes alkaline because it receives hydrogen molecules (2H) and blows them off into the air, but the hydrogen molecular weight is high and the active hydrogen ions increase.

Accordingly, the water entering the electrolytic cell 101 is electrolyzed into acidic ionized water and alkaline ionized water, and the acidic ionized water is discharged to the outside through the acidic ionized water drainage pipe 103, and the alkaline ionized water is discharged through the alkaline ionized water drainage pipe 102. do.

FIG. 2 shows a water electrolysis device 100 according to another embodiment of the present invention, except for the use of the frames 107, 108 having the protruding surface 110. Same as FIG. 1.

3 illustrates an electrode plate including a current collector and a non-current collector, and the electrode plate may include a polygonal, triangular, or other polygonal, circular, or elliptical through hole.

In this case, when the electrode plate is installed in the electrolysis cell, the current collector means a portion that comes into close contact with the ion exchange membrane, and the non-current collector is not adhered to the ion exchange membrane by the through holes except the current collector in the electrode plate. It refers to a part to which water can be supplied, and specifically corresponds to part B surrounded by a current collector that is not removed by a through hole as shown in FIG. 4.

As the electrode plates of the positive electrode and the negative electrode include the current collector and the non-current collector, the surface area of the active electrode can be increased by simply increasing the active electrode surface area as compared with the electrode plate formed in a plate shape.

In addition, the water electrolysis apparatus according to an embodiment of the present invention, without placing the nonwoven fabric in at least one of the above-described negative electrode and the frame on the opposite side and between the positive electrode and the frame on the other side opposite thereto. The degree of the active electrode surface area of the electrode plate, that is, the sum of the circumferential lengths of the non-current collectors per unit area of the electrode plate (sum of total _{perimeter length} cm / _{electrode plate area} cm ² = cm ⁻¹ ) may be adjusted to a predetermined range. have.

The sum of the circumferential lengths of the non-current collectors per unit area of the electrode plate used in the water electrolysis apparatus according to an embodiment of the present invention is, for example, 5 to 200 (cm ^-1 ), 10 to 150 (cm ^-1 ), It may be 50 to 100 (cm ⁻¹ ), and the electroactive capacity may increase when the sum of the circumferential lengths of the non-current collectors per unit area of the electrode plate satisfies these conditions.

The electrode plate may be stainless, titanium, nickel, tantalum or carbon.

In addition, the electrode plate has a thickness of, for example, 0.1 to 1 mm. When the thickness of the electrode plate satisfies the above conditions, the volume of the electrolysis cell may be reduced, which may facilitate manufacturing and reduce cost, and thus may be economically advantageous.

The electrode plate is ruthenium (Ru), rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), platinum for the purpose of increasing the surface area, the oxidation resistance and the electrical resistance to increase the reaction efficiency One precious metal selected from the platinum group precious metals (Pt) may be plated on the electrode plate by oxidation or reduction by high temperature pyrolysis.

Referring to FIG. 5, the electrode plate may have a surface having irregularities or pores (see part C) in order to further increase the active electrode surface area. In addition, for the same purpose, in the plating treatment of the noble metal on the surface of the electrode plate having a smooth plane, the plated portion may be formed to have the shape of irregularities or pores. Of course, it is also possible to form the surface with irregularities or pores on both the electrode plate itself and the plated portion.

As a result, the positive electrode and the negative electrode of the water electrolysis apparatus according to an embodiment of the present invention have a structure connected to a plurality of non-current collectors and current collectors surrounding them, so that the surface area is basically higher than that of the plate-shaped electrode plate. In addition, by forming irregularities or pores on at least one of the surface and the plated portion of the electrode plate itself, the surface area of the electrode plate, that is, the active area for the electrolysis of water can be maximized.

The degree of irregularities or pores of the electrode plate may be represented by a roughness factor, which is a ratio (Y) of the active area Y of the electrode having irregularities or pores to the active area X of the electrode of the plate. / X).

The roughness factor of the electrode plate calculates the active area of the platinum group precious metal plated on the electrode plate by the peak current amount obtained using the technique of a cyclic voltammogram. At this time, the active area is measured by using a potentiostat. For example, in the case of the porous platinum electrode, the active area per unit area is increased by about 150 times compared to the platinum electrode of the plate.

Referring to FIG. 6, the electrode plate includes an electrode active portion 150, an electric portion 170 extending from the electrode active portion 150 and connected to a power source (not shown), and the electrode active portion and the electric portion. It includes an insulating polymer coating layer 160 located on the connection of.

As described above, the electrode plate is formed with a plurality of fine through holes, wherein the electrode active portion is in direct contact with water. Therefore, in order to prevent water from leaking into the electric application part, the insulating polymer coating layer 160 is formed at an intermediate part divided into the electrode active part 150 and the electric application part 170.

The insulating polymer used in the electrode plate is silicone, urethane, ABS, rayon, polytetrafluoroethylene, fluorinated ethylene propylene copolymer, polyether ketone, polybenzimidazole, polyphosphazine Or mixtures of two or more thereof.

An ion exchange membrane is installed between the cathode and the anode, and the ion exchange membrane serves to transport selective ions, has a non-conductive insulating property, and acts as an electrolyte during electrolysis of water.

The ion exchange membrane may be formed of a fluorine-based polymer, a non-fluorine-based polymer, a partially fluorine-based polymer or a mixture of two or more thereof.

Examples of the fluorine-based polymer include perfluorosulfonic acid, polytetrafluoroethylene (PTFE), fluorinated ethylene propylene copolymer (FEP), and polyvinylidene fluoride (PVdF: polyvinylidenefluoride). Examples of the non-fluorine-based polymer include polyimide, polyphenylene oxide, polysulfone, polyether ketone, polybenzimidazole, polyphosphazine, and the like. One or a mixture of two or more of these may be used to form the ion exchange membrane. At this time, the perfluorosulfonic acid system is Naponion of Dupont, which is a cation exchange membrane.

The nonwoven fabric may be disposed between at least one of the anode and the frame on one side thereof and between the cathode and the frame on the other side thereof, thereby increasing adhesion between the electrode plate and the ion exchange membrane of the anode and the cathode. As a result, the electrolytic efficiency of water is increased due to the decrease in interfacial contact resistance.

In addition, as a material of the nonwoven fabric which can be used according to an embodiment of the present invention, all kinds of synthetic resins used for the production of nonwoven fabrics may be used, and for example, polyethylene, polypropylene, polyester, polyacrylate, polyamide, etc. Thermoplastic resin.

In this case, in order to further provide adhesion between the electrode plate and the ion exchange membrane, the nonwoven fabric may use a nonwoven fabric having an embossed surface.

One example of the method of manufacturing the nonwoven fabric is melt spinning the resin to obtain a plurality of continuous filaments, and the continuous filaments are stretched and laminated on a mobile conveyor net, and the nonwoven webs are regularly spaced by embossing rolls on a heating roll. There is a method of manufacturing a spunbond nonwoven fabric having a point fusion region by heating and pressing.

The continuous filament constituting the nonwoven fabric is generally used as a single component filament, but may be used as a multi-component, that is, a composite filament, and a side by side and a sheath-core may be used as the composite type.

As the cross-sectional shape of the continuous filament constituting the nonwoven fabric, a circular shape is generally used, but a triangular cross section, a star shape, or a hollow shape may be used.

The weight of the nonwoven fabric is, for example, 20 to 150 g / m 2 and 50 to 100 g / m 2, and if the weight of the nonwoven fabric is less than 50 g / m 2, the nonwoven fabric may not be suitable as a non-woven fabric for actual output due to a decrease in opacity and distribution. In the continuous operation at the edge due to the coating tension may cause the phenomenon that the edge section is cut off. On the other hand, more than 150g / ㎡ may reduce the flexibility of the nonwoven fabric.

The embossed spunbond nonwoven fabric is thermocompressed by embossed uneven rolls and self-bonds between the continuous filaments resulting in multiple point fusion regions. This point welding area is smaller than a single point but corresponds to a welding area occupying a certain area of the welding area although small. The continuous filament is fixed in this point welding area, and the structure of the continuous filament remains intact in the areas other than the point welding area other than the point welding area, so that the spunbonded nonwoven fabric has high tensile strength and tear resistance. To have.

The frame of the water electrolysis device according to an embodiment of the present invention serves to support the structure of the electrolysis cell, and two types may be used.

Referring to FIG. 7, the frame 200 of the first form includes a through-hole 201 through which water introduced from the outside flows, and an O-ring 202 serving to close and fix an electrode plate. consist of.

Meanwhile, referring to FIG. 8, the frame 300 of the second type includes a plurality of protrusions 303 on the surface thereof, in addition to the through hole 301 and the O-ring 302.

The protrusion on the frame surface serves to maximize the electrolysis efficiency by further strengthening the adhesion between the electrode plates of the positive and negative electrodes and the ion exchange membrane, such as the nonwoven fabric having the embossed surface described above.

The protrusions of the frame may be arranged at intervals of 0.5 to 1.5 cm, and may have a diameter of 0.5 to 10 mm and a height of 0.1 to 2 mm.

When the projection of the frame satisfies the conditions of the gap, diameter, and height, the interface contact resistance between the electrode and the electrolyte of the electrolysis cell can be reduced. At this time, the projection of the frame may be made of silicon, urethane, ABS, zirconium, rayon or a mixture of two or more thereof.

Hereinafter, the present invention will be described in more detail with reference to the following examples. The following examples are only intended to help a clear understanding of the present invention, and the scope of the present invention is not limited to the following examples.

Example

Example 1.

Using a titanium electrode plate plated with platinum as an anode and a cathode, in this case, the size of the electrode plate is 40mm x 25mm, the total length of the circumference of the non-current collector per unit area of the electrode plate is 65 (cm ^-1 ), electrolysis As a frame of the cell, a frame (see FIG. 7) having a protruding surface (protrusion spacing: 1 cm, protrusion height: 1 mm, protrusion diameter: 1 mm, protrusion material: zirconium) was used. Further, a nonwoven fabric (WOOJIN ACT, WW-2209) was disposed between the electrode plate and the protruding frame, and the ion exchange membrane used was Nafion 115 (manufactured by Dupont) as a cation exchange resin membrane.

Finally, the electrolysis cell was assembled as follows and installed in an electrolytic cell to prepare a water electrolysis device:

Protruding frame / nonwoven fabric / cathode electrode plate // cation exchange resin membrane // electrode plate / nonwoven fabric / protrusion frame

Example 2

As a frame of the electrolysis cell, an example was used, except that a general frame having no projection surface (see FIG. 6) and a nonwoven fabric having a surface embossed with a nonwoven fabric (WOOJIN ACT, WW-3008) were used. A water electrolysis device was manufactured in the same manner as 1.

For reference, the assembled state of the electrolysis cell is as follows:

General type frame / nonwoven fabric / electrode plate / / cation exchange resin membrane // electrode plate / nonwoven fabric / general frame.

Example 3

As a frame of the electrolysis cell, a water electrolysis apparatus was manufactured in the same manner as in Example 1, except that a non-woven fabric was disposed using a general frame having no projection surface (see FIG. 6).

For reference, the assembled state of the electrolysis cell is as follows:

General type frame / cathode electrode plate // cation exchange resin membrane // positive electrode plate / general frame

Example 4

A water electrolysis apparatus was manufactured in the same manner as in Example 2, except that the sum of the circumferential lengths of the non-current collectors per unit area of the electrode plate was 40 (cm ⁻¹ ).

For reference, the assembled state of the electrolysis cell is as follows:

General frame / nonwoven fabric / electrode plate / / cation exchange resin membrane / / electrode plate / nonwoven fabric / general frame.

Comparative Example 1

The positive and negative electrodes were 40 mm x 25 mm in size, and a plate-shaped electrode plate plated with platinum was used. The total length of the periphery of the non-current collector per unit area of the electrode plate was 4 (cm ^-1 ), and the frame of the electrolysis cell was used. A water electrolysis device was manufactured in the same manner as in Example 1, except that a non-woven fabric was disposed using a general frame having no protruding surface (see FIG. 6).

For reference, the assembled state of the electrolysis cell is as follows:

Standard frame / electrode plate // cation exchange resin membrane // electrode plate / normal frame

Comparative Example 2

The positive electrode and the negative electrode were 40 mm × 25 mm in size, and a plate-shaped electrode plate plated with platinum was used, and the sum of the circumferential lengths of the non-current collector per unit area of the electrode plate in the electrode plate was 8 (cm ⁻¹ ), and the electrolysis cell As a frame of, a water electrolysis device was manufactured in the same manner as in Example 1, except that a non-woven fabric was disposed using a general frame having no protruding surface (see FIG. 6).

For reference, the assembled state of the electrolysis cell is as follows:

General frame / electrode plate / cation exchange resin membrane / electrode plate / general frame

Comparative Example 3

The positive electrode and the negative electrode were 40 mm x 25 mm in size, and a plate-shaped electrode plate plated with platinum was used, and the total length of the circumferential length of the non-current collector per unit area of the electrode plate in the electrode plate was 11 (cm ^-1 ), and the electrolysis cell A water electrolysis device was manufactured in the same manner as in Example 1, except that a non-woven fabric was disposed using a general frame (see FIG. 6) having no protruding surface as a frame of.

For reference, the assembled state of the electrolysis cell is as follows:

Standard frame / electrode plate // cation exchange resin membrane // electrode plate / normal frame

Comparative Example 4

The positive electrode and the negative electrode were 40 mm x 25 mm in size, and a plate-shaped electrode plate plated with platinum was used, and the total length of the circumferential length of the non-current collector per unit area of the electrode plate in the electrode plate was 15 (cm ^-1 ), and the electrolysis cell As a frame of, a water electrolysis device was manufactured in the same manner as in Example 1, except that a non-woven fabric was disposed using a general frame having no protruding surface (see FIG. 6).

For reference, the assembled state of the electrolysis cell is as follows:

Standard frame / electrode plate // cation exchange resin membrane // electrode plate / normal frame

Comparative Example 5

The anode and cathode are 40mm × 25mm in size, and the total length of the periphery of the non-current collector per unit area of the electrode plate is 11 (cm ^-1 ) and platinum-plated electrode plate is used. A water electrolysis device was manufactured in the same manner as in Example 1, except that a non-woven fabric was used without using a general frame (see FIG. 6).

For reference, the assembled state of the electrolysis cell is as follows:

Standard frame / electrode plate // cation exchange resin membrane // electrode plate / normal frame

Comparative Example 6

The anode and cathode are 40mm × 25mm in size, and the total length of the non-current collector per unit area of the electrode plate is 28 (cm ^-1 ) and platinum-plated electrode plate is used. A water electrolysis device was manufactured in the same manner as in Example 1, except that a non-woven fabric was used without using a general frame (see FIG. 6).

For reference, the assembled state of the electrolysis cell is as follows:

Standard frame / electrode plate // cation exchange resin membrane // electrode plate / normal frame

500cc of tap water was supplied to the electrolytic cell of the water electrolysis apparatus according to Examples 1 to 4 and Comparative Examples 1 to 6, and the amount of current was measured while applying 3.8V using a power source to the positive electrode and the negative electrode. The results are shown in Table 1.

Non-current collector per unit area of electrode plate
Sum of circumference length
(cm ^-1 ) Of the frame
shape Non-woven
Whether or not to use Nonwoven surface
Embossing
Formation Initial current
(mA)
(Applied voltage:
3.8V) 1 hours
Current (mA)
(Applied voltage:
3.8V) Example 1 65 Projection use × 2,500 1,800 Example 2 65 General type use O 2,200 1,600 Example 3 65 General type not used - 1,600 1,000 Example 4 40 General type use O 2,000 1,200 Comparative Example 1 4 General type not used - 250 50 Comparative Example 2 8 General type not used - 500 100 Comparative Example 3 11 General type not used - 700 400 Comparative Example 4 15 General type not used - 800 400 Comparative Example 5 11 General type not used - 600 250 Comparative Example 6 28 General type not used - 800 500

Referring to Table 1, Examples 1, 2, and 4 in which the electrode plate includes a current collector and a non-current collector, and a nonwoven fabric is provided between the electrode plate and the ion exchange membrane, and the non-woven fabric is not provided per unit area of the electrode plate. In the water electrolysis apparatus according to Example 3, in which the sum of the circumferential lengths of the whole satisfies the range of 50 to 150 cm ^−1, the initial current value is 1,600 mA or more when a voltage of 3.8 V is applied, and after 1 hour. The current value is also maintained at 1,000 mA or more, indicating a considerably high electrolysis efficiency. If high electrolysis efficiency is maintained even after such a long time operation, it is possible to obtain a large amount of ionized water by electrolysis of water.

However, on the other hand, even if the electrode plate is in the form of a plate or a shape including a current collector and a non-current collector, the sum of the perimeter lengths of the non-current collector per unit area of the electrode plate is outside the above range and no nonwoven fabric is provided. In the water electrolysis apparatus according to Comparative Examples 1 to 6, the initial current value and the current value after 1 hour were also very small, and it was confirmed that the electrolysis efficiency was not sufficiently exhibited. As a result, the amount of generated ion water was also significantly reduced. Judging.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

100: water electrolysis device 101: electrolytic cell
102: cathode 103: anode
104: ion exchange membrane 105, 106 nonwoven fabric
107, 108: Frame 110: protruding manifestation
121: inlet pipe 122: alkaline ionized water drain pipe
123: acidic ionized water drainage pipe 130: power source
150: electrode active region 160: insulating polymer coating layer
170: electrical parts
200, 300: frames 210, 301: through holes
202, 302: O-ring 303: protrusion

Claims (10)

Electrolytic cell; And an electrolysis cell disposed in the electrolytic cell,
A pair of frames in which the electrolysis cells are spaced apart from each other, a pair of cathodes and anodes disposed to face each other between the pair of frames; An ion exchange membrane disposed between the cathode and the anode; A non-woven fabric disposed between at least one of the cathode and the frame on one side opposite thereto and between the anode and the frame on the other side opposite thereto, wherein the anode and the cathode are electrode plates including a current collector and a non-current collector. Disassembly unit. The method of claim 1,
And said nonwoven fabric has an embossed surface. Electrolytic cell; And an electrolysis cell disposed in the electrolytic cell,
A pair of frames in which the electrolysis cells are spaced apart from each other, a pair of cathodes and anodes disposed to face each other between the pair of frames; An ion exchange membrane disposed between the cathode and the anode; The positive electrode and the negative electrode is an electrode plate including a current collector and a non-current collector, the sum of the circumferential length (cm ^-1 ) of the non-current collector per unit area of the electrode plate is 50 to 150 water electrolysis device. The method according to any one of claims 1 to 3,
And the electrode plate comprises an electrode active portion, an electrically applied portion extending from the electrode active portion and connected to a power source, and an insulating polymer coating layer positioned on a connection portion between the electrode active portion and the electrically applied portion. The method of claim 4, wherein
The insulating polymer is silicone, urethane, ABS, rayon, polytetrafluoroethylene, fluorinated ethylene propylene copolymer, polyether ketone, polybenzimidazole, polyphosphazine or two of these Water electrolysis device, characterized in that consisting of a mixture of phases. The method according to any one of claims 1 to 3,
And the electrode plate has a surface having pores or irregularities formed therein. The method according to any one of claims 1 to 3,
The electrode plate is ruthenium (Ru, rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), platinum (Pt) or (cerium (Ce), tin (Sn), tungsten (W), titanium ( Water electrolysis device characterized in that the plated with one or more metals from the group consisting of Ti), molybdenum (Mo), iron (Fe), manganese (Mn), cobalt (Co) and nickel (Ni). The method of claim 7, wherein
At least one of the electrode plate itself and the plated portion on the electrode plate has a surface having pores or irregularities formed therein. The method according to any one of claims 1 to 3,
And said frame has a surface on which projections are formed. The method of claim 9,
Water frame electrolysis device, characterized in that the projection of the frame made of silicon, urethane, ABS, zirconium, rayon or a mixture of two or more thereof.

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