WO2020255882A1 - Électrode d'électrolyse et électrolyseur - Google Patents

Électrode d'électrolyse et électrolyseur Download PDF

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Publication number
WO2020255882A1
WO2020255882A1 PCT/JP2020/023244 JP2020023244W WO2020255882A1 WO 2020255882 A1 WO2020255882 A1 WO 2020255882A1 JP 2020023244 W JP2020023244 W JP 2020023244W WO 2020255882 A1 WO2020255882 A1 WO 2020255882A1
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WO
WIPO (PCT)
Prior art keywords
mesh
metal
electrolyzer
electrolysis electrode
expanded metal
Prior art date
Application number
PCT/JP2020/023244
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English (en)
Inventor
Terumi Hashimoto
Koji Kawanishi
Takehiro OIWA
Original Assignee
Thyssenkrupp Uhde Chlorine Engineers (Japan) Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thyssenkrupp Uhde Chlorine Engineers (Japan) Ltd. filed Critical Thyssenkrupp Uhde Chlorine Engineers (Japan) Ltd.
Priority to CN202080044411.4A priority Critical patent/CN113994029A/zh
Priority to JP2021574930A priority patent/JP7236568B2/ja
Priority to US17/620,600 priority patent/US20220341049A1/en
Priority to EP20743878.9A priority patent/EP3987085A1/fr
Priority to KR1020217042516A priority patent/KR102651660B1/ko
Publication of WO2020255882A1 publication Critical patent/WO2020255882A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
    • C25B11/03—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
    • C25B11/031—Porous electrodes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
    • C25B11/03—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
    • C25B1/46—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
    • C25B11/055—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material
    • C25B11/057—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of a single element or compound
    • C25B11/061—Metal or alloy
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
    • C25B9/23—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded

Definitions

  • the present invention relates to an electrolysis electrode and an electrolyzer using the same.
  • the present invention relates to an electrolysis electrode in an electrolyzer using a diaphragm and a diaphragm electrolyzer using the same.
  • Patent Document 1 discloses a technology to reduce an electrolysis voltage by making the shape of a mesh of an expanded metal used as a cathode smaller.
  • Patent Document 2 discloses a technology to improve electrolysis performance by making the aperture ratio of a mesh of an expanded metal within a predetermined range.
  • Patent Document 3 discloses an anode composed of a metal mesh having substantially diamond-shaped perforations, in which the ratio of strand and perforation, and a long way distance LWD and a short way distance SWD of the perforations are set to be predetermined values.
  • Patent Document 3 discloses that a platinum group metal oxide, magnetite, ferrite, cobalt spinel, or a mixed metal oxide can be used as a coating.
  • Patent Document 4 discloses an ion exchange membrane electrolysis anode which can electrolyze an aqueous solution of an alkali metal chloride at a lower voltage than ever before and can reduce the concentration of impurity gas contained in anode gas by making the thickness and the ratio of a short way SW to a long way LW, SW/LW, of the metal perforated plate within certain ranges.
  • Patent Document 5 discloses an electrolysis electrode including a conductive base material made of a perforated metal plate and at least one catalyst layer formed on the surface of the conductive base material, in which the thickness of the electrolysis electrode is more than 0.5 mm and 1.2 mm or less, and a value C obtained by dividing the sum B of peripheral lengths of perforations of the electrolysis electrode by the aperture ratio A of the electrolysis electrode is more than 2 and 5 or less.
  • Patent JP 2012-140654 A Patent JP 4453973 B2 Patent JP S62-502820 A Patent JP 6216806 B2 Patent WO 2018/131519
  • an object of the present invention is to provide an electrolysis electrode having a more preferable shape in electrolyzing pure water, an alkali aqueous solution, or an aqueous solution of an alkali metal chloride at a lower voltage than ever before, and an electrolyzer using the same.
  • the present inventors conducted intensive research to solve the above-described problems, found that there is a correlation between an area Rs of plane axes (XY axes) per unit area 1 dm 2 (cm 2 /dm 2 , hereinafter also abbreviated as plane axes area), an area Rc in a thickness direction (Z axis) per unit area 1 dm 2 (cm 2 /dm 2 , hereinafter also abbreviated as thickness direction area), and a fine degree F per unit area 1 dm 2 (hereinafter also abbreviated as fine degree), and a cell voltage, and further found that pure water, an alkali aqueous solution, or an aqueous solution of an alkali metal chloride can be electrolyzed at a lower voltage than ever before when an electrolysis electrode has a shape satisfying certain conditions of them to complete the present invention.
  • the value of Factor V is 70 or more.
  • the metal perforated plate is a punching mesh or an expanded metal.
  • the metal perforated plate is a punching mesh or an expanded metal, and a ratio of a short way center-to-center distance SW to a long way center-to-center distance LW of a mesh of the punching mesh or the expanded metal, SW/LW, is 0.45 or less, preferably, the metal perforated plate is a punching mesh or an expanded metal, and a short way center-to-center distance SW of a mesh of the punching mesh or the expanded metal is 2.0 mm or less, and preferably, the metal perforated plate is a punching mesh or an expanded metal, and a thickness t of a mesh of the punching mesh or the expanded metal is 0.5 mm or less.
  • the metal perforated plate is a punching mesh or an expanded metal, and a thickness t, a long way center-to-center distance, a short way center-to-center distance, and a strand of a mesh of the punching mesh or the expanded metal are from 0.35 to 0.5 mm, from 2.9 to 3.2 mm, from 1.1 to 1.4 mm, and from 0.4 to 0.7 mm, respectively.
  • the metal perforated plate is an expanded metal.
  • an electrolyzer of the present invention including: an anode; and a cathode, in which at least one of the anode and the cathode is the above-described electrolysis electrode of the present invention.
  • the electrolyzer of the present invention includes a diaphragm for separating an anode chamber and a cathode chamber, preferably, the diaphragm is an ion exchange membrane or a porous membrane, and preferably, the diaphragm and the cathode or the anode are in close contact.
  • an electrolysis electrode having a more preferable shape in electrolyzing pure water, an alkali aqueous solution, or an aqueous solution of an alkali metal chloride at a lower voltage than ever before, and an electrolyzer using the same can be provided.
  • FIG. 1 is a schematic partial enlarged view of an electrolysis electrode according to one preferred embodiment of the present invention
  • FIG. 2A is a schematic partial enlarged view of an electrolysis electrode according to another preferred embodiment of the present invention
  • FIG. 2B is a cross-sectional view along the line A-A of FIG. 2A
  • FIG. 3A is a schematic partial enlarged view obtained by further enlarging a part of the schematic partial enlarged view illustrated in FIG. 2A
  • FIG. 3B is a cross-sectional view along the line B-B of FIG. 3A
  • FIG. 4 is a schematic cross-sectional view of an electrolyzer according to one preferred embodiment of the present invention
  • FIG. 5 is a graph illustrating a relationship between Factor V and a cell voltage reduction effect of Example 1
  • FIG. 6 is a graph illustrating a relationship between Factor V and a cell voltage reduction effect of Example 2.
  • An electrolysis electrode of the present invention is an electrode used in an electrolyzer and, in particular, an ion exchange membrane electrolysis electrode used in an ion exchange membrane electrolyzer separated into an anode chamber housing an anode and a cathode chamber housing a cathode by an ion exchange membrane.
  • the electrolysis electrode includes a metal perforated plate.
  • FIG. 1 illustrates a schematic partial enlarged view of an electrolysis electrode according to one preferred embodiment of the present invention using a punching mesh in which diamond-shaped perforations are punched out.
  • FIG. 1 illustrates a schematic partial enlarged view of an electrolysis electrode according to one preferred embodiment of the present invention using a punching mesh in which diamond-shaped perforations are punched out.
  • FIG. 1 illustrates a schematic partial enlarged view of an electrolysis electrode according to one preferred embodiment of the present invention using a punching mesh in which diamond-shaped perforations are punched out.
  • FIG. 1 illustrates a schematic partial enlarged view of an electrolysis electrode according to
  • FIG. 2A illustrates a schematic partial enlarged view of an electrolysis electrode according to another preferred embodiment of the present invention using an expanded metal
  • FIG. 2B illustrates a cross-sectional view along the line A-A of FIG. 2A
  • FIG. 3A illustrates a schematic partial enlarged view obtained by further enlarging a part of the schematic partial enlarged view illustrated in FIG. 2A
  • FIG. 3B illustrates a cross-sectional view along the line B-B of FIG. 3A.
  • the punching mesh and the expanded metal are exemplified as a metal perforated plate 1, but the metal perforated plate 1 is not particularly limited as long as it is a metal perforated plate.
  • the metal perforated plate 1 may be a fabric made of a metal wire rod, and a formula of Factor V described below can be used also in that case. Furthermore, the metal perforated plate 1 may be a product obtained by laminating metal perforated plates.
  • a graph of Factor V and a cell voltage reduction effect has an approximate shape in either case of using the punching mesh or using the expanded metal and can be used regardless of the shape of the metal perforated plate 1.
  • the expanded metal is characterized by including a step of notching and stretching a metal plate and performing rolling to flatten the surface
  • the cross-section is not perpendicular but inclined as illustrated in the cross-sectional view of FIG. 2B and the cross-sectional view of FIG. 3B, and an approximation formula indicated in Examples can be used in the calculation of Factor V, in particular, Rc.
  • the cell voltage reduction effect becomes smaller in the case where a SW/LW ratio is more than 0.6 compared to the case where the SW/LW ratio is more than 0.45 and 0.60 or less.
  • the case where the SW/LW ratio is 0.45 or less is preferable because the cell voltage reduction effect becomes larger compared to the case where Factor V is the same value and the SW/LW ratio is more than 0.45 and 0.60 or less.
  • This is a phenomenon which is not found in the punching mesh, and when the expanded metal is used as the electrode shape, the ratio of SW and LW has a greater impact on the cell voltage reduction effect compared to the punching mesh. This is assumed to be caused by the impact of an angle in the thickness direction or the like on current distribution, resistance when generated gas is released from the electrode surface, and the like.
  • the metal perforated plate 1 is a punching mesh or an expanded metal, and a short way center-to-center distance SW of a mesh of the punching mesh or the expanded metal is 2.0 mm or less.
  • the metal perforated plate 1 is a punching mesh or an expanded metal
  • a thickness t of a mesh of the punching mesh or the expanded metal is 0.5 mm or less.
  • the value of Factor V of the metal perforated plate 1 is 40 or more, and known configurations can be adopted for other configurations.
  • a titanium expanded metal produced by shearing and then expanding a plate and flattened by rolling or the like can be preferably used.
  • a coating of an electrode catalyst material such as a platinum group metal oxide, magnetite, ferrite, cobalt spinel, or a mixed metal oxide, may be formed on the surface of the electrolysis electrode to reduce an electrolysis voltage.
  • laminated multiple layers of the metal perforated plates 1 may be used to ensure the strength.
  • the value of Factor V of the metal perforated plate 1 on the side in contact with an ion exchange membrane needs to be 40 or more
  • FIG. 4 is a cross-sectional view of an electrolyzer including a diaphragm according to one preferred embodiment of the electrolyzer of the present invention, and the electrolyzer of the present invention can be preferably used for not only ion exchange membrane electrolysis and brine electrolysis but also other electrolysis, water electrolysis, and alkaline water electrolysis.
  • a diaphragm electrolyzer 10 is separated into an anode chamber 12 and a cathode chamber 13 by a diaphragm 11, and an anode 14 and a cathode 15 are housed in the anode chamber 12 and the cathode chamber 13, respectively.
  • the anode 14 is fixed to an anode power feeder 16 like an anode rib in the anode chamber 12, and the cathode 15 is fixed to the cathode chamber 13 through a cathode current collector 17 in the cathode chamber 13.
  • the cathode current collector has elasticity, and a state where the anode 14, the diaphragm 11, and the cathode 15 are in close contact one another at a preferred pressure is maintained.
  • the above-described electrolysis electrode of the present invention is used for an electrode, in particular, the anode 14.
  • an electrolyte solution for example, an aqueous solution of an alkali metal chloride or an aqueous solution can be electrolyzed at a lower voltage than ever before.
  • the diaphragm electrolyzer 10 is separated by the diaphragm 11 into the anode chamber 12 in which the anode 14 is housed and the cathode chamber 13 in which the cathode 15 is housed, it is important only that the above-described electrolysis electrode of the present invention is used for an electrode, in particular, the anode 14, and configurations of a known diaphragm electrolyzer can be adopted for other configurations.
  • the cathode 15 is not particularly limited as long as it is a cathode usually used for electrolysis, and a known cathode can be used, for example, an expanded metal made of corrosion-resistant metal such as nickel can be used. It is to be noted that a coating of an electrode catalyst material containing a platinum group metal oxide may be formed on the surface of the cathode 15.
  • the anode chamber 12 and the cathode chamber 13 are hermetically laminated through a gasket 18, and the distance between the anode 14 and the cathode 15 is adjusted by the thickness of the gasket 18 and the lengths of the anode power feeder 16 and the cathode current collector 17.
  • the electrolyzer may be operated with the diaphragm 11 and the cathode 15 substantially in close contact, or the electrolyzer may be operated with a gap of about 1-2 mm as illustrated in the drawing.
  • the diaphragm electrolyzer 10 may be an electrolyzer in which a plurality of such unit electrolyzers are laminated.
  • the electrolyzer of the present invention may be an electrolyzer in which bipolar units, each of which has an anode and a cathode on both sides by connecting outer surfaces of an anode chamber and a cathode chamber to each other, are laminated with diaphragms sandwiched therebetween, and an anode chamber unit and a cathode chamber unit, one of which has an anode chamber or a cathode chamber, are laminated on both ends with the diaphragms sandwiched therebetween.
  • a current is made to flow between both electrodes while supplying a brine aqueous solution from an anode chamber inlet 12a provided in the anode chamber 12 and a diluted aqueous solution of sodium hydroxide from a cathode chamber inlet 13a provided in the cathode chamber 13.
  • a current is made to flow between both electrodes while supplying a brine aqueous solution from an anode chamber inlet 12a provided in the anode chamber 12 and a diluted aqueous solution of sodium hydroxide from a cathode chamber inlet 13a provided in the cathode chamber 13.
  • an anode solution is discharged together with a product of the electrolysis from an anode chamber outlet 12b in the anode chamber 12, and a cathode solution containing a product of the electrolysis is also discharged from a cathode chamber outlet 13b in the cathode chamber 13.
  • an ion exchange membrane is used as a diaphragm in the case of performing brine electrolysis.
  • Example1 Samples 1 to 16 of electrolysis anodes formed from samples obtained by applying DSE coatings on titanium base materials for punching-type meshes were produced according to the conditions indicated in Table 1 below, and each of them was installed into an ion exchange membrane electrolyzer of a type illustrated in FIG. 4. Then, electrolysis of a brine solution was performed according to the electrolysis conditions described below. It is to be noted that the electrolysis area of the ion exchange membrane electrolyzer was 1 dm 2 , a cation exchange membrane Flemion F-8080A manufactured by AGC Inc.
  • brine electrolysis was performed using an elastic body as a structure for feeding power to the cathode in a cell having a structure in which the diaphragm is pressed and further the cathode is pressed to the anode.
  • the electrolysis temperature was from 86 to 88°C, and the current density was 6 kA/m 2 .
  • Table 1 indicates the following.
  • the cell voltage was decreased by 30 mV.
  • the cell voltage was decreased by 11 mV.
  • the cell voltage was decreased by 37 mV.
  • FIG. 5 A correlation of Factor V with the cell voltage of Table 1 is illustrated in FIG. 5. It is found from FIG. 5 that the cell voltage reduction effect changes significantly at the value of Factor V around 60 and a good cell voltage reduction effect can be obtained when the value of Factor V is 70 or more.
  • Example 2 Samples 17 to 38 of electrolysis anodes formed from samples obtained by applying DSE coatings on titanium base materials for expanded metals, in which factors of shape research become complex, were produced according to the conditions indicated in Table 2 below, and each of them was installed into an ion exchange membrane electrolyzer of a type illustrated in FIG. 4. Then, electrolysis of a brine solution was performed according to the electrolysis conditions described below. It is to be noted that, similarly to Example 1, the electrolysis area of the ion exchange membrane electrolyzer was 1 dm 2 , a cation exchange membrane Flemion(a registered trademark) F-8080A manufactured by AGC Inc.
  • LW, SW, ST, t, S, F, Rs, and Rc in Table 2 are the same as those in Table 1, and basically have the same calculation formulas as in the punching mesh.
  • the expanded metal is characterized by including a step of notching and stretching a metal plate and performing rolling to flatten the surface, the cross-section is not perpendicular but inclined as illustrated in FIG. 2B.
  • the actual mesh aperture ratio S tends to become smaller than the calculation result of the formula regarding the mesh aperture ratio S indicated in Example 1.
  • a projected area when being exposed to light from the surface i.e., an area A of a white part in FIG. 2A and FIG. 3A was measured by a microscope as an actual perforation area, and the mesh aperture ratio S was calculated based on the area A.
  • Rs was calculated using an area of a gray part excluding the hatched part and the white part as the plane axes area. It is to be noted that the hatched part indicates a state where an area in the thickness direction is viewed.
  • the thickness direction area Rc was simply calculated from the following formula.
  • the long way center-to-center distance LW was also measured together with the area A by the microscope, the short way center-to-center distance SW was calculated from the area A and LW by approximating the perforation shape by a diamond shape, and the region 2 indicated by the dashed line in FIG. 2A, i.e., the mesh total peripheral length W per one mesh was calculated from the values of the area A, LW, and SW by the following formula based on the diamond shape approximation of the perforation shape.
  • the thickness direction area Rc was determined using W, L1 and L2 illustrated in FIG. 3A, and the mesh thickness t by triangle approximation of the width in the thickness direction, which is indicated in the following formulae: , and .
  • Example 2 Similarly to Example 1, an aqueous solution of 200 ⁇ 10 g/L NaCl was used as an anode solution, and an aqueous solution of 32 ⁇ 0.5% by mass of NaOH was used as a cathode solution.
  • the electrolysis temperature was from 86 to 88°C, and the current density was 6 kA/m 2 .
  • Example 2 Similarly to Example 1, the operation was continuously performed until the cell voltage was stabilized (for about from 20 to 30 days), and an evaluation was performed by the cell voltage after being stabilized. A result of the cell voltages when the conditions of various meshes were changed is shown in Table 2. It is to be noted that all these cell voltages were compared by values corrected to conditions of 90°C and 32.0% by mass of NaOH. As the cell voltage reduction effect, a value of Sample-17 was standardized, and a larger value indicates a larger reduction effect.
  • FIG. 6 A correlation of Factor V with the cell voltage of Table 2 is illustrated in FIG. 6. It is found from FIG. 6 that, even in the case of using the expanded metal, the graph becomes a shape approximated to that of FIG. 5 using the punching mesh. Moreover, it is found that, in the case of using the expanded metal, a good cell voltage reduction effect can be obtained when Factor V is 40 or more.
  • the cell voltage reduction effect becomes smaller in the case where the SW/LW ratio is more than 0.6 compared to the case where the SW/LW ratio is more than 0.45 and 0.60 or less.
  • the cell voltage reduction effect becomes larger by around 10 mV compared to the case where Factor V is the same value and the SW/LW ratio is more than 0.45 and 0.60 or less. This is a phenomenon which is not found in the punching mesh, and when the expanded metal is used as the electrode shape, the ratio of SW and LW has a greater impact on the cell voltage reduction effect compared to the punching mesh. This is assumed to be caused by the impact of an angle in the thickness direction or the like on current distribution, resistance when generated gas is released from the electrode surface, and the like.
  • the structures of Sample-13 in Table 1 and Samples-34, 37, and 38 in Table 2 i.e., the mesh thickness t of from 0.35 to 0.5 mm, the long way center-to-center distance LW of from 2.9 to 3.2 mm, the short way center-to-center distance SW of from 1.1 to 1.4 mm, and the strand (perpendicular mesh width) ST of from 0.4 to 0.7 mm are most preferable.
  • an electrolysis electrode having a more preferable shape in electrolyzing pure water, an alkali aqueous solution, or an aqueous solution of an alkali metal chloride at a lower voltage than ever before, and an electrolyzer using the same can be provided.

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Abstract

L'invention concerne une électrode d'électrolyse présentant une forme plus préférable dans l'électrolyse de l'eau pure, d'une solution aqueuse alcaline ou d'une solution aqueuse d'un chlorure métallique alcalin à une tension inférieure à toutes celles utilisées précédemment et un électrolyseur l'utilisant. Une électrode d'électrolyse ou similaire comprend : une plaque perforée métallique présentant une valeur de facteur V de 40 ou plus représentée par la formule suivante ; Facteur V = Rs × Rc × F/100.000, dans laquelle Rs représente une aire de surface dans la direction plane par aire unitaire de 1 dm2 [cm2/dm2], Rc représente une aire de surface dans la direction de l'épaisseur par aire unitaire de 1 dm2 [cm2/dm2] et F est le nombre d'ouvertures de maille par aire unitaire de 1 dm2 (degré fin) [nombre/dm2].
PCT/JP2020/023244 2019-06-18 2020-06-12 Électrode d'électrolyse et électrolyseur WO2020255882A1 (fr)

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CN202080044411.4A CN113994029A (zh) 2019-06-18 2020-06-12 电解电极和电解槽
JP2021574930A JP7236568B2 (ja) 2019-06-18 2020-06-12 電解用電極および電解装置
US17/620,600 US20220341049A1 (en) 2019-06-18 2020-06-12 Electrolysis electrode and electrolyzer
EP20743878.9A EP3987085A1 (fr) 2019-06-18 2020-06-12 Électrode d'électrolyse et électrolyseur
KR1020217042516A KR102651660B1 (ko) 2019-06-18 2020-06-12 전기분해 전극 및 전해조

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US20230243046A1 (en) * 2022-02-01 2023-08-03 Verdagy, Inc. Flattened wire mesh electrode for use in an electrolyzer cell

Citations (11)

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JPS62502820A (ja) 1985-05-07 1987-11-12 エルテック・システムズ・コ−ポレ−ション エキスパンデッド金属メッシュおよび被覆陽極構造体
US5804055A (en) * 1995-05-04 1998-09-08 Eltech Systems Corporation Electrode, electrochemical cell and electrochemical processes
EP1076731A1 (fr) * 1998-05-06 2001-02-21 Eltech Systems Corporation Structure d'electrode en plomb a surface maillee
JP2001329380A (ja) * 2000-05-19 2001-11-27 Furuya Kinzoku:Kk 多孔質板材の製造方法
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CN113994029A (zh) 2022-01-28
KR20220013568A (ko) 2022-02-04
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