WO2021200376A1 - アルカリ水電解槽 - Google Patents
アルカリ水電解槽 Download PDFInfo
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- WO2021200376A1 WO2021200376A1 PCT/JP2021/011900 JP2021011900W WO2021200376A1 WO 2021200376 A1 WO2021200376 A1 WO 2021200376A1 JP 2021011900 W JP2021011900 W JP 2021011900W WO 2021200376 A1 WO2021200376 A1 WO 2021200376A1
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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
- 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
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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
- 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
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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
- 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
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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
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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
- C25B15/00—Operating or servicing cells
- C25B15/04—Regulation of the inter-electrode distance
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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
- 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
- C25B9/60—Constructional parts of cells
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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
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/60—Constructional parts of cells
- C25B9/63—Holders for electrodes; Positioning of the electrodes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Definitions
- the present invention relates to an electrolytic cell for alkaline water electrolysis.
- Alkaline water electrolysis method is known as a method for producing hydrogen gas and oxygen gas.
- hydrogen gas is generated from the cathode by electrolyzing water using a basic aqueous solution (alkaline water) in which an alkali metal hydroxide (for example, NaOH, KOH, etc.) is dissolved as an electrolytic solution.
- an electrolytic cell for alkaline water electrolysis there is known an electrolytic cell having an anode chamber and a cathode chamber partitioned by an ion-permeable diaphragm, in which an anode is arranged in the anode chamber and a cathode is arranged in the cathode chamber.
- an electrolytic cell having a zero gap structure zero gap type electrolytic cell in which the anode and the cathode are held so as to be in direct contact with the diaphragm has been proposed.
- FIG. 1 is a partial cross-sectional view schematically illustrating a conventional zero-gap type alkaline water electrolytic cell 900 according to one embodiment.
- the zero-gap type electrolytic cell 900 is provided between the polar chamber units 910, 910, ...
- the electrode chamber units 910, 910, ... The arranged ion-permeable diaphragm 920, the gaskets 930 and 930 arranged between the diaphragm 920 and the flange portion 912 of the polar chamber unit 910 and sandwiching the peripheral portion of the diaphragm 920, and the partition wall 911 of one of the polar chamber units 911.
- the conductive elastic body 960 presses the flexible cathode 970 toward the diaphragm 920 and the anode 940, so that the diaphragm 920 is sandwiched between the adjacent cathode 970 and the anode 940. ..
- the diaphragm 920 and the anode 940 and the cathode 970 are in direct contact (ie, with a zero gap), which reduces the solution resistance between the anode 940 and the cathode 970 and thus reduces the energy loss.
- the conductive elastic body 960 presses the flexible cathode 970 toward the diaphragm 920 and the rigid anode 940, and the rigid anode 940 is welded to the conductive rib 913.
- the conductive rib 913 is welded to the partition wall 911.
- the diaphragm 920 in the alkaline water electrolytic cell, an inexpensive porous membrane is usually used instead of the expensive ion exchange membrane used in the alkali metal salt electrolytic cell.
- the diaphragm 920 which is a porous membrane, has a certain degree of permeability to gas. Therefore, from the viewpoint of increasing the purity of the hydrogen gas recovered from the cathode chamber, it is possible to maintain the pressure in the cathode chamber where the hydrogen gas is generated higher than the pressure in the anode chamber where the oxygen gas is generated to perform electrolysis. It is advantageous.
- the diaphragm 920 When the pressure in the cathode chamber is higher than the pressure in the anode chamber, the diaphragm 920 is pushed toward the anode 940 by the pressure difference (differential pressure) between the bipolar chambers.
- the direction in which the conductive elastic body 960 pushes the cathode 970 is between the two polar chambers. Since the differential pressure is in the same direction as the force pushing the diaphragm 920, it is possible to stably maintain the zero gap state even if the repulsive force of the conductive elastic body 960 is low. This can be said to be advantageous from the viewpoint of lengthening the renewal interval of the elastic body 960 and from the viewpoint of reducing the wear of the diaphragm 10 due to the pressure fluctuation during operation.
- the anode 940 since oxygen gas is generated at the anode 940 of the alkaline water electrolytic cell, the anode 940 is placed under oxidative conditions in combination with the outflow of electrons from the anode 940.
- the anode 940 usually comprises a conductive substrate and a catalyst supported on the surface of the substrate.
- the catalyst and the conductive substrate are likely to be ionized or oxidized, so that the catalyst is likely to fall off from the electrode surface, and as a result, the anode 940 is faster than the cathode 970. It tends to reach the end of its life.
- the anode 940 that has reached the end of its life needs to be replaced with a new anode.
- the anode 940 In order to replace the anode 940 in the electrolytic cell 900, (1) the anode 940 is mechanically separated from the conductive rib 913 (for example, by fusing or the like), and (2) the height of the end of the conductive rib 913. (For example, by grinding or the like), it is necessary to weld (3) a new anode 940 to the conductive rib 913. Since dedicated equipment is required to perform such replacement work, it is difficult to replace the anode 940 at the site where the electrolytic cell is installed and operated.
- the polar chamber unit 910 whose anode 940 has reached the end of its life is sent to a factory where the anode 940 can be replaced, and after the anode 940 is replaced at the factory, the polar chamber where the anode 940 replacement work is completed.
- the unit 910 is returned from the factory to the place where the electrolytic cell is installed and operated, as it is, or with the elastic material 960 and the cathode 970 attached. In this way, in the conventional zero-gap type alkaline water electrolytic cell, the work of renewing the anode requires a high cost.
- the rigid anode since the rigid anode is generally fixed to the conductive rib by welding or the like, it takes time and cost to replace the anode. From the viewpoint of facilitating the attachment and detachment of the anode, it is possible to use an electrolytic cell without conductive ribs, but the conductive ribs not only serve to electrically connect the electrodes and the partition wall, but also in the polar chamber. It also plays another important role in providing space for the flow of polar solutions and gases. In particular, in the zero-gap type electrolytic cell, the gas generated at the electrode cannot escape to the diaphragm side of the electrode, so that it escapes to the partition wall side of the electrode.
- the electrode By providing a space with a certain amount of space behind the electrode (and the conductive elastic body, if any) behind the electrode (that is, on the partition side) to allow the gas generated by the electrode to escape, the electrode Since the time for the gas generated in the above to stay in the vicinity of the electrode can be shortened, the gas resistance can be reduced and the electrolytic voltage can be reduced. Therefore, providing a conductive rib in the anode chamber is also important from the viewpoint of reducing energy loss.
- An object of the present invention is to provide a possible zero-gap type alkaline water electrolytic cell.
- the present invention includes the following forms [1] to [9].
- An ion-permeable diaphragm which is arranged between the anode-side frame and the cathode-side frame and separates the anode chamber from the cathode chamber,
- a gasket that is sandwiched between the anode-side frame and the cathode-side frame and holds the peripheral edge of the diaphragm.
- the anode which is arranged inside the anode chamber without being held by the gasket, With the cathode arranged inside the cathode chamber without being held by the gasket, A first elastic body having conductivity arranged inside the anode chamber and Including The anode is a flexible first perforated plate.
- An alkaline water electrolytic cell in which the anode is arranged between the diaphragm and the first elastic body and is pressed toward the cathode by the first elastic body.
- the anode chamber is With at least one first conductive rib provided so as to project from the inner wall of the anode-side frame. Including a conductive first current collector held by the first conductive rib.
- [3] Further including a first rigid current collector having conductivity, which is arranged in contact with the anode.
- the first rigid body current collector is arranged between the anode and the first elastic body.
- the cathode chamber includes at least one second conductive rib provided so as to project from the inner wall of the cathode side frame.
- the cathode is a flexible second perforated plate.
- the cathode according to any one of [1] to [3], wherein the cathode is arranged between the diaphragm and the second elastic body and is pressed toward the anode by the second elastic body. Alkaline water electrolytic cell.
- the cathode chamber is With at least one second conductive rib provided so as to project from the inner wall of the cathode side frame. Includes a second conductive current collector held by the second conductive rib.
- a method of replacing the anode in the alkaline water electrolytic cell according to any one of [1] to [8]. Separating the anode side frame from the gasket and Separating the diaphragm from the anode and Removing the anode from the anode chamber and Assembling the alkaline water electrolyzer using a new anode instead of the anode, A method for replacing electrodes in an alkaline water electrolytic cell, including.
- a zero gap structure is realized by pressing the flexible anode toward the cathode by a conductive elastic body. Therefore, according to the alkaline water electrolytic cell of the present invention, it is possible to easily replace the anode, and in particular, even when the conductive ribs are provided in the anode chamber, the anode can be easily replaced. Is possible.
- E 1 and E 2 are intended to mean “E 1 or E 2, or combinations thereof", elements E 1, ..., E N (N is 3 for more integer) "E 1, ..., E N-1, and / or E N" notation is a means "E 1, ..., E N-1, or E N or combinations thereof," do.
- FIG. 2 is a cross-sectional view schematically illustrating an alkaline water electrolytic cell 100 (hereinafter, may be referred to as “electrolytic cell 100”) according to one embodiment.
- the electrolytic tank 100 includes a conductive anode-side frame 51 that defines the anode chamber A; a conductive cathode-side frame 52 that defines the cathode chamber C; and an anode-side frame 51.
- An ion-permeable diaphragm 10 that is arranged between the anode side frame 52 and separates the anode chamber A and the cathode chamber C; sandwiched between the anode side frame 51 and the cathode side frame 52, and the diaphragm 10
- gaskets 30 and 30 (hereinafter, may be simply referred to as "gastaker 30") holding the peripheral portion; with the anode 40 arranged inside the anode chamber A without being held by the gasket 30; with the anode 30; It includes a cathode 21 that is arranged inside the cathode chamber C without being held.
- the anode 40 is a flexible perforated plate (first perforated plate), and the cathode 21 is a rigid perforated plate (second perforated plate).
- the electrolytic cell 100 also has at least one conductive rib (first conductive rib) 61, 61, ... (Hereinafter referred to as "conductive rib 61") provided so as to protrude from the inner wall of the anode side frame 51.
- the anode 40 is pressed toward the cathode 21 by the elastic body 81.
- the electrolytic cell 100 has at least one conductive rib (second conductive rib) 62, 62, ... (Hereinafter referred to as "conductive rib 62") provided so as to protrude from the inner wall of the cathode side frame 52.
- the cathode 21 is held by the conductive rib 62.
- the anode side frame 51 and the cathode side frame 52 known frames used in the alkaline water electrolytic cell can be used without particular limitation as long as the anode chamber A and the cathode chamber C can be defined respectively.
- the anode-side frame 51 has a conductive partition wall 51a and a flange portion 51b that is watertightly coupled to the entire peripheral edge of the partition wall 51a.
- the cathode side frame 52 also has a conductive partition wall 52a and a flange portion 52b that is watertightly coupled to the entire peripheral edge portion of the partition wall 52a.
- the partition walls 51a and 52a partition adjacent electrolytic cells and electrically connect the adjacent electrolytic cells in series.
- the flange portion 51b defines the anode chamber A together with the partition wall 51a, the diaphragm 10, and the gasket 30, and the flange portion 52b defines the cathode chamber C together with the partition wall 52a, the diaphragm 10, and the gasket 30.
- the flange portions 51b and 52b have a shape corresponding to the gasket 30. That is, when the gasket 30 is sandwiched between the anode-side frame 51 and the cathode-side frame 52, the flange portion 51b of the anode-side frame 51 and the flange portion 52b of the cathode-side frame 52 have gaps with the gaskets 30 and 30, respectively. Contact without.
- the flange portion 51b has an anode liquid supply flow path for supplying the anode liquid to the anode chamber A and an anode liquid recovery flow path for recovering the anode liquid and the gas generated at the anode from the anode liquid A. And have. Further, the flange portion 52b includes a cathode liquid supply flow path for supplying the cathode liquid to the cathode chamber C, and a cathode liquid recovery flow path for recovering the cathode liquid and the gas generated at the cathode from the cathode chamber C.
- a rigid conductive material having alkali resistance can be used without particular limitation, and examples of such a material include simple substances such as nickel and iron; SUS304, SUS310, SUS310S, Stainless steels such as SUS316 and SUS316L; and metal materials obtained by subjecting them to nickel plating can be mentioned.
- a rigid material having alkali resistance can be used without particular limitation, and examples of such a material are simple metals such as nickel and iron; SUS304, SUS310, SUS310S, SUS316. , SUS316L and other stainless steels; and nickel-plated metal materials; and non-metallic materials such as reinforced plastics.
- the partition wall 51a and the flange portion 51b of the anode-side frame 51 may be joined by welding, adhesion, or the like, or may be integrally formed of the same material.
- the partition wall 52a and the flange portion 52b of the cathode side frame 52 may be joined by welding, adhesion, or the like, or may be integrally formed of the same material.
- electrolytic cell 100 electrolytic cell 100
- the flange portion 51b of the anode side frame 51 extends to the opposite side of the partition wall 51a (on the right side of the paper surface in FIG. 2).
- the cathode chamber of the adjacent electrolytic cell may be defined together with the partition wall 51a, and the flange portion 52b of the cathode side frame 52 extends to the opposite side of the partition wall 52a (the left side of the paper surface in FIG. 2) to form the partition wall 52a. And may demarcate the anode chamber of the adjacent electrolytic cell.
- the diaphragm 10 a known ion-permeable diaphragm used in a zero-gap type electrolytic cell for alkaline water electrolysis can be used without particular limitation. It is desirable that the diaphragm 10 has low gas permeability, low electrical conductivity, and high strength.
- the diaphragm 10 include a porous membrane made of asbestos and / or modified asbestos, a porous membrane made of a polysulfone polymer, a cloth made of polyphenylene sulfide fiber, a fluoroporous membrane, an inorganic material and an organic material. Examples thereof include porous diaphragms such as porous membranes using a hybrid material containing both materials. In addition to these porous diaphragms, an ion exchange membrane such as a fluorine-based ion exchange membrane can also be used as the diaphragm 10.
- FIG. 2 shows a cross section of the gasket 30.
- the gasket 30 has a flat shape and sandwiches the peripheral edge portion of the diaphragm 10, while sandwiching it between the flange portion 51b of the anode side frame 51 and the flange portion 52b of the cathode side frame 52.
- the gasket 30 is preferably formed of an elastomer having alkali resistance.
- Examples of materials for the gasket 30 include natural rubber (NR), styrene-butadiene rubber (SBR), chloroprene rubber (CR), butadiene rubber (BR), acrylonitrile-butadiene rubber (NBR), silicone rubber (SR), and ethylene-.
- Elastomers such as propylene rubber (EPT), ethylene-propylene-diene rubber (EPDM), fluororubber (FR), isobutylene-isoprene rubber (IIR), urethane rubber (UR), and chlorosulfonated polyethylene rubber (CSM) can be mentioned.
- EPT propylene rubber
- EPDM ethylene-propylene-diene rubber
- FR fluororubber
- IIR isobutylene-isoprene rubber
- UR urethane rubber
- CSM chlorosulfonated polyethylene rubber
- a layer of the material having alkali resistance may be provided on the surface of the gasket material by coating or the like.
- first conductive rib 61 and the second conductive rib 62 known conductive ribs used in the alkaline water electrolytic cell can be used without particular limitation.
- the first conductive rib 61 is erected from the partition wall 51a of the anode side frame 51
- the second conductive rib 62 is erected from the partition wall 52a of the cathode side frame 52. ..
- the shape, number, and arrangement of the first conductive ribs 61 are not particularly limited as long as the first conductive ribs 61 can fix and hold the first current collector 71 to the anode-side frame 51.
- the shape, number, and arrangement of the second conductive ribs 62 are not particularly limited as long as the second conductive ribs 62 can fix and hold the cathode 21 with respect to the cathode side frame 52.
- a rigid conductive material having alkali resistance can be used without particular limitation, and examples of such a material include nickel and iron.
- Single metals such as SUS304, SUS310, SUS310S, SUS316, SUS316L and the like; nickel-plated metals and the like.
- the current collector (first current collector) 71 a known current collector used in an alkaline water electrolysis tank can be used without particular limitation, and for example, an expand made of a rigid conductive material having alkali resistance. Metal, punched metal, reticulated body and the like can be preferably adopted. Examples of the material of the current collector 71 include elemental metals such as nickel and iron; stainless steels such as SUS304, SUS310, SUS310S, SUS316, and SUS316L; and metals plated with nickel. In holding the current collector 71 on the conductive rib 61, known methods such as welding and pinning can be adopted without particular limitation.
- the elastic body (first elastic body) 81 a known conductive elastic body used in an alkaline water electrolysis tank can be used without particular limitation, and for example, an assembly of metal wires made of a conductive material having alkali resistance.
- An elastic mat made of a body, a coil spring, a leaf spring, or the like can be preferably adopted.
- the material of the current collector 81 include elemental metals such as nickel and iron; stainless steels such as SUS304, SUS310, SUS310S, SUS316, and SUS316L; and metals plated with nickel.
- known methods such as welding and pinning can be adopted without particular limitation.
- the anode 40 is an anode for generating oxygen.
- the anode 40 usually includes a conductive substrate and a catalyst layer that covers the surface of the substrate.
- the catalyst layer is preferably porous.
- As the conductive base material of the anode 40 for example, nickel iron, vanadium, molybdenum, copper, silver, manganese, platinum group element, graphite, chromium, or a combination thereof can be used.
- a conductive base material made of nickel can be preferably used.
- the catalyst layer contains nickel as an element.
- the catalyst layer preferably contains nickel oxide, metallic nickel, nickel hydroxide, or a combination thereof, and may contain an alloy of nickel and one or more other metals.
- the catalyst layer is particularly preferably made of metallic nickel.
- the catalyst layer may further contain chromium, molybdenum, cobalt, tantalum, zirconium, aluminum, zinc, platinum group elements, rare earth elements, or a combination thereof. Rhodium, palladium, iridium, or ruthenium, or a combination thereof, may be further supported as an additional catalyst on the surface of the catalyst layer.
- the anode 40 is a flexible perforated plate (first perforated plate).
- the anode 40 which is a flexible perforated plate, includes a flexible conductive base material (for example, a wire mesh woven (or knitted) with a metal wire, a thin punched metal, etc.) and the catalyst layer.
- a provided perforated plate can be used.
- the area of one hole of the anode 40, which is a flexible perforated plate is preferably 0.05 to 2.0 mm 2 , more preferably 0.1 to 0.5 mm 2 .
- the pore size of the anode 40, which is a flexible perforated plate is preferably 20% or more, more preferably 20 to 50%, based on the area of the current-carrying surface.
- the bending softness of the anode 40 which is a flexible perforated plate, is preferably 0.05 mm / g or more, more preferably 0.1 to 0.8 mm / g.
- the term "bending softness” means that one side of a square sample having a length of 10 mm and a width of 10 mm is fixed so as to be horizontal, and a constant load is applied downward to the other side facing the fixed side. It is a value obtained by dividing the bending width (mm) of the other side (tip of the sample) by the load (g). That is, bending softness is a parameter showing properties opposite to bending rigidity. Bending softness can be adjusted by the material and thickness of the perforated plate, and in the case of wire mesh, the weaving method (or knitting method) of the metal wire constituting the wire mesh.
- the peripheral edge of the anode 40 is held by the current collector 71, the elastic body 81, and / or the flange portion 51b of the anode side frame 51.
- welding, pinning, bolting, and folding into the current collector 71 that is, ,
- a known method such as hooking a valley formed by folding the peripheral edge of the anode 40 to the peripheral edge of the current collector 71
- the cathode 21 is a cathode for generating hydrogen.
- the cathode 21 usually includes a conductive substrate and a catalyst layer that covers the surface of the substrate.
- a conductive base material of the cathode 21 for example, nickel, nickel alloy, stainless steel, mild steel, nickel alloy, or stainless steel or mild steel whose surface is nickel-plated can be preferably adopted.
- a coating made of a noble metal oxide, nickel, cobalt, molybdenum, or manganese, or an oxide thereof, or a noble metal oxide can be preferably adopted.
- the cathode 21 is a rigid perforated plate.
- a perforated plate having a rigid conductive base material (for example, expanded metal or the like) and the catalyst layer can be used.
- known methods such as welding, pinning, and bolting can be adopted without particular limitation.
- the anode 40 is arranged between the diaphragm 10 and the first elastic body 81, and is pressed toward the cathode 21 by the first elastic body 81 to realize a zero gap structure. ..
- the electrolytic cell 100 in the work of replacing the anode 40 that has reached the end of its life with a new anode 40, (1) the anode side frame 51 is separated from the gasket 30; (2) the diaphragm 10 is separated from the anode 40. (3) Removing the anode 40 from the anode chamber A; (4) assembling the electrolytic cell 100 using a new anode 40 in place of the removed anode 40.
- the removal of the anode 40 in the above (3) and the assembly of the new anode 40 in the above (4) are easy. Further, since the position of the anode 40 is automatically adjusted by the first elastic body 81 in the assembled electrolytic cell 100, complicated work such as in the conventional zero gap type alkaline water electrolytic cell is performed when assembling the new anode 40. (For example, the work of aligning the heights of the ends of the conductive ribs 913 by grinding or the like (see FIG. 1)) is unnecessary. Therefore, according to the electrolytic cell 100, the anode 40 can be easily replaced.
- FIG. 3 is a cross-sectional view schematically illustrating an alkaline water electrolytic cell 200 (hereinafter, may be referred to as “electrolytic cell 200”) according to another embodiment.
- electrolytic cell 200 an alkaline water electrolytic cell 200
- the electrolytic tank 200 includes a conductive anode-side frame 51 that defines the anode chamber A; a conductive cathode-side frame 52 that defines the cathode chamber C; and an anode-side frame 51.
- An ion-permeable diaphragm 10 that is arranged between the anode side frame 52 and separates the anode chamber A and the cathode chamber C; sandwiched between the anode side frame 51 and the cathode side frame 52, and the diaphragm 10 With the anodes 30 and 30 holding the peripheral edge; placed inside the anode chamber A without being held by the gasket 30, and with the anode 40; placed inside the cathode chamber C without being held by the gasket 30. It includes a cathode 20 and.
- the anode 40 is a flexible first perforated plate
- the cathode 20 is a flexible second perforated plate.
- the electrolytic cell 200 also has at least one conductive rib (first conductive rib) 61 provided so as to protrude from the inner wall of the anode side frame 51, and a current collector (first) held by the conductive rib 61.
- the current collector (1) 71 and the conductive elastic body (first elastic body) 81 held by the current collector 71 are provided, and the anode 40 is pressed toward the cathode 20 by the elastic body 81.
- the electrolytic cell 200 also has a conductive rib (second conductive rib) 62 provided so as to protrude from the inner wall of the cathode side frame 52, and a current collector (second collector) held by the conductive rib 62.
- the electric body) 72 and the conductive elastic body (second elastic body) 82 held by the current collector 72 are provided, and the cathode 20 is pressed toward the anode 40 by the elastic body 82. ..
- the second conductive rib 62 the same conductive rib as the second conductive rib 62 described above in relation to the electrolytic cell 100 (FIG. 2) can be used.
- the second conductive rib 62 is erected from the partition wall 52a of the cathode side frame.
- the shape, number, and arrangement of the second conductive ribs 62 are not particularly limited as long as the second conductive ribs 62 can fix and hold the second current collector 72 to the cathode side frame 52.
- the peripheral edge of the anode 40 is held by the current collector 71, the elastic body 81, and / or the flange portion 51b of the anode side frame 51.
- welding, pinning, bolting, and folding into the current collector 71 that is, , A known method such as hooking a valley formed by folding the peripheral edge of the anode 40 to the peripheral edge of the current collector 71
- a known method such as hooking a valley formed by folding the peripheral edge of the anode 40 to the peripheral edge of the current collector 71
- the cathode 20 differs from the cathode 21 (see FIG. 2) in that it is a flexible perforated plate (second perforated plate).
- the cathode 20, which is a flexible perforated plate includes a flexible conductive base material (for example, a wire mesh woven (or knitted) with a metal wire, a thin punched metal, etc.) and the catalyst layer.
- a provided perforated plate can be used.
- the area of one hole of the cathode 20 which is a flexible perforated plate is preferably 0.05 to 2.0 mm 2 , more preferably 0.1 to 0.5 mm 2 .
- the pore size of the cathode 20, which is a flexible perforated plate is preferably 20% or more, more preferably 20 to 50%, based on the area of the current-carrying surface.
- the bending softness of the cathode 20, which is a flexible perforated plate is preferably 0.05 mm / g or more, more preferably 0.1 to 0.8 mm / g.
- the peripheral edge of the cathode 20 is held by the current collector 72, the elastic body 82, and / or the flange portion 52b of the cathode side frame 52.
- welding, pinning, bolting, and folding into the current collector 72 that is, ,
- a known method such as hooking a valley formed by folding the peripheral edge of the cathode 20 to the peripheral edge of the current collector 72
- the current collector (second current collector) 72 a known current collector used in an alkaline water electrolytic cell can be used without particular limitation, and for example, an expand made of a rigid conductive material having alkali resistance. Metal, punched metal and the like can be preferably adopted. Examples of the material of the current collector 72 include elemental metals such as nickel and iron; stainless steels such as SUS304, SUS310, SUS310S, SUS316, and SUS316L; and metals plated with nickel. In holding the current collector 72 on the conductive rib 62, a known method such as welding or pinning can be adopted without particular limitation.
- the elastic body (second elastic body) 82 a known conductive elastic body used in an alkaline water electrolysis tank can be used without particular limitation, and for example, an assembly of metal wires made of a conductive material having alkali resistance.
- An elastic mat made of a body, a coil spring, a leaf spring, or the like can be preferably adopted.
- the material of the elastic body 82 include elemental metals such as nickel and iron; stainless steels such as SUS304, SUS310, SUS310S, SUS316, and SUS316L; and metals plated with nickel.
- known methods such as welding, pinning, and bolting can be adopted without particular limitation.
- the anode 40 is arranged between the diaphragm 10 and the first elastic body 81, and is pressed toward the cathode 20 by the first elastic body 81, and the cathode 20 is pressed against the diaphragm 10 and the second elastic body 81.
- a zero gap structure is realized by being arranged between the elastic body 82 and being pressed toward the anode 40 by the second elastic body 82.
- FIG. 4 is a cross-sectional view schematically illustrating an alkaline water electrolytic cell 300 (hereinafter, may be referred to as “electrolytic cell 300”) according to another embodiment.
- electrolytic cell 300 an alkaline water electrolytic cell 300
- the electrolytic tank 300 includes a conductive anode-side frame 51 that defines the anode chamber A; a conductive cathode-side frame 52 that defines the cathode chamber C; and an anode-side frame 51.
- An ion-permeable diaphragm 10 that is arranged between the anode side frame 52 and separates the anode chamber A and the cathode chamber C; sandwiched between the anode side frame 51 and the cathode side frame 52, and the diaphragm 10 With the anodes 30 and 30 holding the peripheral edge; placed inside the anode chamber A without being held by the gasket 30, and with the anode 40; placed inside the cathode chamber C without being held by the gasket 30. It includes a cathode 20 and.
- the anode 40 is a flexible first perforated plate
- the cathode 20 is a flexible second perforated plate.
- the electrolytic cell 300 also has at least one conductive rib (first conductive rib) 61 provided so as to protrude from the inner wall of the anode side frame 51, and a current collector (first) held by the conductive rib 61. 1) 71, the conductive elastic body (first elastic body) 81 held by the current collector 71, and the conductivity arranged between the elastic body 81 and the anode 40. The anode 40 is pressed against the cathode 20 by the elastic body 81 via the rigid current collector 91.
- the rigid body collector 91 is arranged so that the anode 40 is sandwiched between the rigid body collector 91 and the diaphragm 10, and the anode 40 is supported by the rigid body collector 91.
- the electrolytic cell 300 also has at least one conductive rib (second conductive rib) 62 provided so as to protrude from the inner wall of the cathode side frame 52, and a current collector (first) held by the conductive rib 62.
- the current collector (2) 72 and the conductive elastic body (second elastic body) 82 held by the current collector 72 are provided, and the cathode 20 is pressed toward the anode 40 by the elastic body 82. Has been done.
- a rigid current collector having conductivity can be used, and for example, an expanded metal, a punched metal, or the like made of a rigid conductive material having alkali resistance can be preferably adopted.
- the material of the rigid current collector 91 include elemental metals such as nickel and iron; stainless steels such as SUS304, SUS310, SUS310S, SUS316, and SUS316L; and metals plated with nickel.
- the rigid current collector 91 may or may not be held by the elastic body 81. When the rigid current collector 91 is held by the elastic body 81, known means such as welding, pinning, and bolting can be adopted without particular limitation.
- the peripheral edge of the anode 40 is held by the rigid body collector 91, the current collector 71, the elastic body 81, and / or the flange portion 51b of the anode side frame 51, preferably the rigid body collector 91. Is held in. In holding the peripheral edge of the anode 40 on the flange portion 51b of the rigid current collector 91, the current collector 71, the elastic body 81, and / or the anode side frame 51, welding, pinning, bolting, and rigid current collection are performed.
- the peripheral edge of the cathode 20 is held by the current collector 72, the elastic body 82, and / or the flange portion 52b of the cathode side frame 52.
- welding, pinning, bolting, and folding into the current collector 72 that is, ,
- a known method such as hooking a valley formed by folding the peripheral edge of the cathode 20 to the peripheral edge of the current collector 72
- the diaphragm 10, the anode 40, the rigid current collector 91, and the first elastic body 81 are arranged in this order (that is, the anode 40 is arranged between the diaphragm 10 and the first elastic body 81).
- the rigid current collector 91 is arranged between the anode 40 and the first elastic body 81), and the anode 40 is directed by the first elastic body 81 toward the cathode 20 via the rigid current collector 91 (that is, the diaphragm).
- the diaphragm 10, the cathode 20, and the second elastic body 82 are arranged in this order (ie, the cathode 20 is placed between the diaphragm 10 and the second elastic body 82), and the cathode.
- the zero gap structure is realized by pressing the 20 toward the anode 40 (that is, toward the diaphragm 10) by the second elastic body 82.
- the electrolytic cell 300 in the work of replacing the anode 40 that has reached the end of its life with a new anode 40, (1) the anode side frame 51 is separated from the gasket 30; (2) the diaphragm 10 is separated from the anode 40.
- the positions of the anode 40 and the cathode 20 are automatically adjusted by the first elastic body 81 and the second elastic body 82, so that the conventional zero gap type is used when assembling the new anode 40.
- There is no need for complicated work for example, work of aligning the heights of the ends of the conductive ribs 913 by grinding or the like (see FIG. 1)) as in an alkaline water electrolytic cell. Therefore, even in the electrolytic cell 300, the anode 40 can be easily replaced.
- the electrolytic cell 300 is provided with the rigid current collector 91 between the anode 40 and the first elastic body 81, the pressure at which the anode 40 and the cathode 20 are pressed toward the diaphragm 10 is more evenly applied over the entire surface of both electrodes. Therefore, it becomes possible to make the current density more uniform. Further, since the electrolytic cell 300 is provided with the rigid current collector 91 between the anode 40 and the first elastic body 81, it is possible to reduce the deformation and wear of the diaphragm 10 due to the pressure fluctuation in the polar chamber.
- FIG. 5 is a cross-sectional view schematically illustrating an alkaline water electrolytic cell 400 (hereinafter, may be referred to as “electrolytic cell 400”) according to another embodiment.
- electrolytic cell 400 an alkaline water electrolytic cell 400
- the electrolytic tank 400 includes a conductive anode-side frame 51 that defines the anode chamber A; a conductive cathode-side frame 52 that defines the cathode chamber C; and an anode-side frame 51.
- An ion-permeable diaphragm 10 that is arranged between the anode side frame 52 and separates the anode chamber A and the cathode chamber C; sandwiched between the anode side frame 51 and the cathode side frame 52, and the diaphragm 10 With the anodes 30 and 30 holding the peripheral edge; placed inside the anode chamber A without being held by the gasket 30, and with the anode 40; placed inside the cathode chamber C without being held by the gasket 30. It includes a cathode 20 and.
- the anode 40 is a flexible first perforated plate.
- the cathode 20 may be a rigid perforated plate or a flexible perforated plate (second perforated plate), but is preferably a flexible perforated plate.
- the electrolytic cell 400 includes at least one conductive rib (first conductive rib) 61 provided so as to protrude from the inner wall of the anode-side frame 51, and a current collector (first) held by the conductive rib 61. 71, and an elastic body (first elastic body) 81 having conductivity held by the current collector 71, and the anode 40 is pressed toward the cathode 20 by the elastic body 81. ing.
- the electrolytic cell 400 also has at least one conductive rib (second conductive rib) 62 provided so as to protrude from the inner wall of the cathode side frame 52, and a current collector (first) held by the conductive rib 62.
- the cathode 20 is provided with a rigid current collector 91, and the cathode 20 is pressed toward the anode 40 by the elastic body 82 via the rigid current collector 91.
- the rigid body collector 91 is arranged so that the cathode 20 is sandwiched between the rigid body collector 91 and the diaphragm 10, and the cathode 20 is supported by the rigid body collector 91. There is.
- the peripheral edge of the anode 40 is held by the current collector 71, the elastic body 81, and / or the flange portion 51b of the anode side frame 51.
- welding, pinning, bolting, and folding into the current collector 71 that is, , A known method such as hooking a valley formed by folding the peripheral edge of the anode 40 to the peripheral edge of the current collector 71
- a known method such as hooking a valley formed by folding the peripheral edge of the anode 40 to the peripheral edge of the current collector 71
- the peripheral edge of the cathode 20 is held by the rigid body collector 91, the current collector 72, the elastic body 82, and / or the flange portion 52b of the cathode side frame 52, preferably the rigid body collector 91. Is held in. In holding the peripheral edge of the cathode 20 to the flange portion 52b of the rigid current collector 91, the current collector 72, the elastic body 82, and / or the cathode side frame 52, welding, pinning, bolting, and rigid current collection are performed.
- the diaphragm 10, the anode 40, and the first elastic body 81 are arranged in this order (that is, the anode 40 is arranged between the diaphragm 10 and the first elastic body 81), and the anode 40 is the first.
- the elastic body 81 of 1 is pressed toward the cathode 20 (that is, toward the anode 10), and the diaphragm 10, the cathode 20, the rigid current collector 91, and the second elastic body 82 are arranged in this order (that is, the cathode).
- the cathode 20 is the second elastic body 82.
- the zero gap structure is realized by being pressed toward the anode 40 (that is, toward the diaphragm 10) via the rigid current collector 91.
- the electrolytic cell 400 in the work of replacing the anode 40 that has reached the end of its life with a new anode 40, (1) the anode side frame 51 is separated from the gasket 30; (2) the diaphragm 10 is separated from the anode 40.
- the electrolytic cell 400 is provided with a rigid current collector 91 between the cathode 20 and the second elastic body 82, the pressure at which the anode 40 and the cathode 20 are pressed toward the diaphragm 10 is more evenly applied over the entire surface of both electrodes. Therefore, it becomes possible to make the current density more uniform. Further, since the electrolytic cell 400 is provided with the rigid current collector 91 between the cathode 20 and the second elastic body 82, it is possible to reduce the deformation and wear of the diaphragm 10 due to the pressure fluctuation in the polar chamber.
- alkaline water electrolytic cells 100 to 400 having a form in which the anode chamber is provided with the conductive rib 61 and the cathode chamber is provided with the conductive rib 62 are given as an example, but the present invention is not limited to this form. ..
- an alkaline water electrolytic cell in which only one of the anode chamber and the cathode chamber is provided with conductive ribs or an alkaline water electrolytic cell in which neither the anode chamber nor the cathode chamber is provided with conductive ribs. Is also possible.
- the electrolytic tank 500 includes a conductive anode-side frame 51 that defines the anode chamber A; a conductive cathode-side frame 52 that defines the cathode chamber C; and an anode-side frame 51.
- An ion-permeable diaphragm 10 that is arranged between the anode side frame 52 and separates the anode chamber A and the cathode chamber C; sandwiched between the anode side frame 51 and the cathode side frame 52, and the diaphragm 10 With the anodes 30 and 30 holding the peripheral edge; placed inside the anode chamber A without being held by the gasket 30, and with the anode 40; placed inside the cathode chamber C without being held by the gasket 30. It includes a cathode 20 and.
- the anode 40 is a flexible first perforated plate.
- the cathode 20 may be a flexible second perforated plate or a rigid perforated plate, but is preferably a rigid perforated plate.
- the electrolytic cell 500 is a conductive elastic body (first elastic body) arranged between the conductive partition wall 51a of the anode side frame 51 and the anode 40 so as to be in direct contact with the partition wall 51a and the anode 40.
- the body) 81 is provided, and the anode 40 is pressed toward the cathode 20 by the elastic body 81.
- the electrolytic cell 500 is also an elastic body having conductivity (second) arranged between the conductive partition wall 52a of the cathode side frame 52 and the cathode 20 so as to be in direct contact with the partition wall 52a and the cathode 20.
- the elastic body) 82 is provided, and the cathode 20 is pressed toward the anode 40 by the elastic body 82.
- the peripheral edge of the anode 40 is held by the elastic body 81 and / or the anode side frame 51.
- known methods such as welding, pinning, and bolting can be adopted without particular limitation.
- the peripheral edge of the cathode 20 is held by the elastic body 82 and / or the cathode side frame 52.
- known methods such as welding, pinning, and bolting can be adopted without particular limitation.
- the anode 40 is arranged between the diaphragm 10 and the first elastic body 81, and is pressed toward the cathode 20 by the first elastic body 81, and the cathode 20 is pressed against the diaphragm 10 and the second elastic body 81.
- a zero gap structure is realized by being arranged between the elastic body 82 and being pressed toward the anode 40 by the second elastic body 82.
- the anode 40 can be easily replaced.
- the thickness of each electrolytic cell can be reduced, and therefore the electrolytic cell can be miniaturized to occupy the occupied site. It is possible to increase the amount of gas produced per area. Further, since one or both of the anode chamber and the cathode chamber do not have the conductive ribs, it is possible to reduce the man-hours required for manufacturing the material constituting the electrolytic cell and the electrolytic cell.
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Abstract
Description
[1] 陽極室を画定する、陽極側枠体と、
陰極室を画定する、陰極側枠体と、
前記陽極側枠体と前記陰極側枠体との間に配置され、前記陽極室と前記陰極室とを区分する、イオン透過性の隔膜と、
前記陽極側枠体および前記陰極側枠体に挟持され、前記隔膜の周縁部を保持する、ガスケットと、
前記ガスケットに保持されることなく前記陽極室内部に配置された、陽極と、
前記ガスケットに保持されることなく前記陰極室内部に配置された、陰極と、
前記陽極室内部に配置された、導電性を有する第1の弾性体と、
を含み、
前記陽極は、可撓性を有する第1の多孔板であり、
前記陽極は、前記隔膜と前記第1の弾性体との間に配置され、前記第1の弾性体によって前記陰極へ向けて押し付けられている、アルカリ水電解槽。
前記陽極側枠体の内壁から突出して設けられた、少なくとも1つの第1の導電性リブと、
前記第1の導電性リブに保持された、導電性の第1の集電体と
を含み、
前記第1の弾性体は、前記第1の集電体に支持されている、[1]に記載のアルカリ水電解槽。
前記第1の剛体集電体は、前記陽極と前記第1の弾性体との間に配置され、
前記陽極は、前記第1の剛体集電体によって支持されている、[1]又は[2]に記載のアルカリ水電解槽。
前記陰極は、前記第2の導電性リブに保持されている、[4]に記載のアルカリ水電解槽。
前記陰極は、可撓性を有する第2の多孔板であり、
前記陰極は、前記隔膜と前記第2の弾性体との間に配置され、前記第2の弾性体によって前記陽極へ向けて押し付けられている、[1]~[3]のいずれかに記載のアルカリ水電解槽。
前記陰極側枠体の内壁から突出して設けられた、少なくとも1つの第2の導電性リブと、
前記第2の導電性リブに保持された、導電性の第2の集電体と
を含み、
前記第2の弾性体は、前記第2の集電体に支持されている、[6]に記載のアルカリ水電解槽。
前記第2の剛体集電体は、前記陰極と前記第2の弾性体との間に配置され、
前記陰極は、前記第2の剛体集電体によって支持されている、[6]又は[7]に記載のアルカリ水電解槽。
前記陽極側枠体を前記ガスケットから分離することと、
前記隔膜を前記陽極から分離することと、
前記陽極を前記陽極室から取り外すことと、
前記陽極に代えて新たな陽極を用いて前記アルカリ水電解槽を組み立てることと、
を含む、アルカリ水電解槽の電極交換方法。
20、21 陰極
30 ガスケット
40 陽極
51 陽極側枠体
52 陰極側枠体
51a、52a (導電性の)隔壁
51b、52b フランジ部
61、62 導電性リブ
71、72 集電体
81、82 導電性を有する弾性体
91 剛体集電体
900 従来のゼロギャップ型アルカリ水電解槽
910 極室ユニット
911 導電性の隔壁
912 フランジ部
913、914 導電性リブ
920 イオン透過性の隔膜
930 ガスケット
940 陽極
950 集電体
960 導電性の弾性体
970 陰極
100、200、300、400、500、900 アルカリ水電解槽
A 陽極室
C 陰極室
Claims (9)
- 陽極室を画定する、陽極側枠体と、
陰極室を画定する、陰極側枠体と、
前記陽極側枠体と前記陰極側枠体との間に配置され、前記陽極室と前記陰極室とを区分する、イオン透過性の隔膜と、
前記陽極側枠体および前記陰極側枠体に挟持され、前記隔膜の周縁部を保持する、ガスケットと、
前記ガスケットに保持されることなく前記陽極室内部に配置された、陽極と、
前記ガスケットに保持されることなく前記陰極室内部に配置された、陰極と、
前記陽極室内部に配置された、導電性を有する第1の弾性体と、
を含み、
前記陽極は、可撓性を有する第1の多孔板であり、
前記陽極は、前記隔膜と前記第1の弾性体との間に配置され、前記第1の弾性体によって前記陰極へ向けて押し付けられている、アルカリ水電解槽。 - 前記陽極室は、
前記陽極側枠体の内壁から突出して設けられた、少なくとも1つの第1の導電性リブと、
前記第1の導電性リブに保持された、導電性の第1の集電体と
を含み、
前記第1の弾性体は、前記第1の集電体に支持されている、
請求項1に記載のアルカリ水電解槽。 - 前記陽極に接して配置された、導電性を有する第1の剛体集電体をさらに含み、
前記第1の剛体集電体は、前記陽極と前記第1の弾性体との間に配置され、
前記陽極は、前記第1の剛体集電体によって支持されている、
請求項1又は2に記載のアルカリ水電解槽。 - 前記陰極は、剛体多孔板である、
請求項1~3のいずれかに記載のアルカリ水電解槽。 - 前記陰極室は、前記陰極側枠体の内壁から突出して設けられた、少なくとも1つの第2の導電性リブを含み、
前記陰極は、前記第2の導電性リブに保持されている、請求項4に記載のアルカリ水電解槽。 - 前記陰極室内部に配置された、導電性を有する第2の弾性体をさらに含み、
前記陰極は、可撓性を有する第2の多孔板であり、
前記陰極は、前記隔膜と前記第2の弾性体との間に配置され、前記第2の弾性体によって前記陽極へ向けて押し付けられている、
請求項1~3のいずれかに記載のアルカリ水電解槽。 - 前記陰極室は、
前記陰極側枠体の内壁から突出して設けられた、少なくとも1つの第2の導電性リブと、
前記第2の導電性リブに保持された、導電性の第2の集電体と
を含み、
前記第2の弾性体は、前記第2の集電体に支持されている、
請求項6に記載のアルカリ水電解槽。 - 前記陰極に接して配置された、導電性を有する第2の剛体集電体をさらに含み、
前記第2の剛体集電体は、前記陰極と前記第2の弾性体との間に配置され、
前記陰極は、前記第2の剛体集電体によって支持されている、
請求項6又は7に記載のアルカリ水電解槽。 - 請求項1~8のいずれかに記載のアルカリ水電解槽において前記陽極を交換する方法であって、
前記陽極側枠体を前記ガスケットから分離することと、
前記隔膜を前記陽極から分離することと、
前記陽極を前記陽極室から取り外すことと、
前記陽極に代えて新たな陽極を用いて前記アルカリ水電解槽を組み立てることと、
を含む、アルカリ水電解槽の電極交換方法。
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US17/798,913 US20230096320A1 (en) | 2020-03-31 | 2021-03-23 | Alkaline water electrolysis vessel |
DE112021002015.3T DE112021002015T5 (de) | 2020-03-31 | 2021-03-23 | Alkalisches-wasser-elektrolyse-behälter |
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- 2021-03-23 JP JP2022511977A patent/JPWO2021200376A1/ja active Pending
- 2021-03-23 DE DE112021002015.3T patent/DE112021002015T5/de active Pending
- 2021-03-23 WO PCT/JP2021/011900 patent/WO2021200376A1/ja active Application Filing
- 2021-03-23 CN CN202180021700.7A patent/CN115335551A/zh active Pending
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5785981A (en) * | 1980-11-15 | 1982-05-28 | Asahi Glass Co Ltd | Method for producing alkali hydroxide |
JPH0649675A (ja) * | 1992-06-03 | 1994-02-22 | Tosoh Corp | 複極式電解槽 |
JP2019099845A (ja) * | 2017-11-29 | 2019-06-24 | 株式会社トクヤマ | 電解槽 |
JP6559383B1 (ja) * | 2017-12-05 | 2019-08-14 | 株式会社トクヤマ | アルカリ水電解用膜−電極−ガスケット複合体 |
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TW202214912A (zh) | 2022-04-16 |
AU2021245579A1 (en) | 2022-09-08 |
JPWO2021200376A1 (ja) | 2021-10-07 |
US20230096320A1 (en) | 2023-03-30 |
DE112021002015T5 (de) | 2023-01-26 |
CN115335551A (zh) | 2022-11-11 |
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