WO2015056641A1 - Dispositif d'électrolyse d'eau et système de stockage d'énergie et d'alimentation en énergie utilisant celui-ci - Google Patents

Dispositif d'électrolyse d'eau et système de stockage d'énergie et d'alimentation en énergie utilisant celui-ci Download PDF

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WO2015056641A1
WO2015056641A1 PCT/JP2014/077142 JP2014077142W WO2015056641A1 WO 2015056641 A1 WO2015056641 A1 WO 2015056641A1 JP 2014077142 W JP2014077142 W JP 2014077142W WO 2015056641 A1 WO2015056641 A1 WO 2015056641A1
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electrode
water
hydrogen
water electrolysis
intermediate product
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PCT/JP2014/077142
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English (en)
Japanese (ja)
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杉政　昌俊
寛人 内藤
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株式会社日立製作所
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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
    • C25B15/02—Process control or regulation
    • 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
    • C25B5/00—Electrogenerative processes, i.e. processes for producing compounds in which electricity is generated simultaneously
    • 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
    • C25B9/70—Assemblies comprising two or more cells
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
    • C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/133—Renewable energy sources, e.g. sunlight

Definitions

  • the present invention relates to a water electrolysis apparatus that electrolyzes water to generate hydrogen and oxygen, and an energy storage / supply system using the water electrolysis apparatus.
  • renewable energy power generation such as wind power generation and solar power generation emits almost no carbon dioxide during power generation, which contributes to the suppression of greenhouse gas emissions and is expected to expand significantly in the future.
  • power plants suitable for local production and consumption of energy are expected to be used in areas where energy costs have been high, such as remote islands, mountainous areas, and remote areas.
  • Patent Document 1 Japanese Patent Laid-Open No. 2013-136801 discloses a regeneration in which hydrogen is produced by a water electrolysis apparatus from variable power generated by a renewable energy facility and stored.
  • a renewable energy conversion / storage device is disclosed, in which the oxygen generating electrode of the water electrolysis device is an alloy oxide of Ir and Mn.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2013-136801
  • an energy conversion / storage device capable of efficiently generating and storing hydrogen from fluctuating electric power derived from renewable energy can be provided.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2013-136801
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2013-136801
  • uses water as the raw material of hydrogen to be produced there is no need to worry about the depletion of the raw material, and the raw material cost is low. There is a merit that it is very low.
  • reducing the equipment cost of the water electrolysis device is an issue in order to maintain competitiveness compared to conventional grid power.
  • the electrodes are completely separated by a partition wall having low gas permeability in order to prevent mixing of hydrogen gas and oxygen gas generated at the electrodes.
  • the entire apparatus including pipes and tanks is completely separated into two systems, a hydrogen line and an oxygen line.
  • the partition wall material has the largest proportion of the equipment cost of the water electrolysis apparatus, and a reduction in partition wall cost is strongly demanded in order to reduce the cost of the entire water electrolysis apparatus. It is more desirable to integrate the hydrogen line and the oxygen line in order to simplify auxiliary equipment.
  • the present invention has been made in view of the problems and requirements as described above, and an object of the present invention is to provide a water electrolysis apparatus capable of reducing the equipment cost as compared with the conventional one and an energy storage / supply system using the same. It is to provide.
  • the gist of the present invention is as follows.
  • One embodiment of the present invention is a water electrolysis apparatus that electrolyzes water to generate hydrogen and oxygen, and electrolyzes an aqueous electrolyte solution containing an intermediate product that repeats a redox reaction, and water
  • the water electrolysis apparatus is characterized in that it is an intermediate product that is higher than the hydrogen generation potential and lower than the hydrogen generation potential of the electrolytic electrode.
  • the present invention can add the following improvements and changes to the water electrolysis apparatus (I) according to the above-described invention.
  • the redox reaction of the intermediate product is dissolution and precipitation of metal.
  • the metal to be dissolved and precipitated is any one element or alloy of zinc, iron and lead.
  • the electrolyte aqueous solution contains metal ions, and the concentration of the metal ions is 0.01 mol / L or more and 10 mol / L or less.
  • the electrolytic electrode includes two types of electrodes: an oxygen generating electrolytic electrode that generates oxygen by water oxidation reaction and a hydrogen generating electrolytic electrode that generates hydrogen by water reduction reaction.
  • Another embodiment of the present invention is a water electrolysis apparatus that electrolyzes water to generate hydrogen and oxygen, and an aqueous electrolyte solution containing an intermediate product that repeats an oxidation-reduction reaction;
  • a water electrolysis apparatus characterized in that it is an ion and the electrolytic electrode is a metal containing at least one of platinum, rhodium, nickel, and iron.
  • Still another embodiment of the present invention is a water electrolysis apparatus that electrolyzes water to generate hydrogen and oxygen, an aqueous electrolyte solution containing an intermediate product that repeats a redox reaction, and water.
  • the reduction reaction of the product proceeds and hydrogen is generated at the electrolytic electrode
  • the oxidation reaction of the intermediate product proceeds at the intermediate electrode, so that oxygen and hydrogen are generated at different timings inside the electrolytic cell.
  • a hydrogen generator is provided.
  • Still another aspect of the present invention is a system for storing and supplying energy in the form of hydrogen, a renewable energy power generation mechanism that converts renewable energy into electrical energy, and the renewable energy power generation means.
  • a water electrolysis apparatus that performs electrolysis of water using the power generated in the above, and a hydrogen-based power generation mechanism that generates power using hydrogen produced by the water electrolysis apparatus, wherein the water electrolysis apparatus is A water electrolysis apparatus according to the present invention is provided.
  • the conventional water electrolysis apparatus uses an expensive ion exchange membrane as a partition wall between the electrodes, which has been a main cause of the high cost of the water electrolysis apparatus.
  • There are devices that use porous membranes as partition walls but advanced technology is required to achieve sufficient gas barrier properties and electrical conductivity at the same time with porous membranes. As a result, it is difficult to reduce the cost of partition walls. .
  • various auxiliary devices are required to prevent mixing of the generated hydrogen gas and oxygen gas, which has been a factor that hinders cost reduction.
  • the present inventors can mix hydrogen gas and oxygen gas if a water electrolysis apparatus that does not generate hydrogen gas and oxygen gas simultaneously (generated at different timings) in the electrolytic electrode can be realized. Since the prevention can be easily performed, it is considered that the entire apparatus can be simplified (that is, the cost can be reduced) without being restricted by the above-described partition material and auxiliary devices. Therefore, the present inventors diligently researched a method for generating hydrogen gas and oxygen gas at different timings in the electrolytic electrode, returning to the basic principle of water electrolysis.
  • the present inventors have found a water electrolysis method in which hydrogen gas and oxygen gas are generated at different timings by interposing an oxidation-reduction reaction of an intermediate product without gas generation in an aqueous electrolyte solution.
  • the present invention has been completed based on this finding.
  • FIG. 1 is a schematic cross-sectional view showing an example of the configuration of the water electrolysis apparatus according to the first embodiment and the state of operation.
  • the water electrolysis apparatus 101 of the first embodiment is a bipolar water electrolysis apparatus, and electrolyzes water inside an electrolytic cell 112 in which an aqueous electrolyte solution 107 is accommodated.
  • An electrolytic electrode 103 for the purpose and an intermediate electrode 102 for performing a redox reaction of the intermediate product are provided.
  • a partition wall 104 is provided between the intermediate electrode 102 and the electrolytic electrode 103 in order to prevent a reverse reaction of the generated gas.
  • the aqueous electrolyte solution 107 contains an intermediate product that repeats the oxidation-reduction reaction.
  • the intermediate product has an intermediate reduction in oxidation-reduction potential that is higher than the hydrogen generation potential of the intermediate electrode 102 and the hydrogen generation potential of the intermediate product, and lower than the hydrogen generation potential of the electrolytic electrode 103. It is preferable to use a product. Thereby, hydrogen gas and oxygen gas can be generated at different timings in the electrolytic electrode 103.
  • the load 110 is connected to the water electrolyzer 101 or the electrodes are short-circuited.
  • the oxidation-reduction potential of the intermediate product is lower than the hydrogen generation potential of the electrolytic electrode 103, the oxidation reaction proceeds on the surface of the intermediate electrode 102, and the reduction reaction proceeds on the surface of the electrolytic electrode 103.
  • the oxidation reaction that occurs on the surface of the intermediate electrode 102 is an oxidation reaction in which the reductant 106 returns to the oxidant 105.
  • an electrochemical reaction of the following formula (4) proceeds.
  • Electrons released from the reductant 106 flow from the intermediate electrode 102 through the load 110 to the electrolytic electrode 103, and hydrogen gas 111 is generated on the surface of the electrolytic electrode 103 by the reduction reaction of the above formula (2).
  • the oxygen gas 109 is generated inside the electrolytic cell 112 when a voltage is applied to the water electrolysis apparatus (at the time of charging), and a load or a short circuit is generated in the water electrolysis apparatus.
  • the circuit is connected (during discharging)
  • only hydrogen gas 111 is generated inside the electrolytic cell 112. This is because an intermediate product capable of repeating a change from the oxidant 105 to the reductant 106 and a change from the reductant 106 to the oxidant 105 is used to convert the electric power input to the water electrolysis apparatus 101 into an intermediate state. This is because the product can be temporarily stored as the reduced product 106.
  • the water electrolysis apparatus 101 can store the power input by the reduction reaction of the intermediate product when power is input as the reductant 106 and connect the electrodes to the load. Therefore, it can be regarded as a water electrolysis apparatus having a charge / discharge function.
  • the intermediate product may be a substance having a higher redox potential than the hydrogen generation potential.
  • the intermediate product can be used as a water-soluble molecule such as an organic molecule or a metal complex.
  • the reductant 106 that plays a role of storing input power in particular is solid.
  • the metal is desirable because the density of the reductant is high and can be stably fixed to the surface of the intermediate electrode 102.
  • the metal whose oxidation-reduction potential is higher than the hydrogen generation potential include zinc, iron, lead, tin, nickel, and alloys thereof. From the viewpoint of side reactions (for example, hydrogen generation), it is more desirable to use zinc.
  • the intermediate electrode 102 that performs the oxidation-reduction reaction of the intermediate product may be any substance that has a hydrogen generation potential lower than the oxidation-reduction potential of the intermediate product and high adhesion to the deposited metal. At this time, the hydrogen generation overvoltage is preferably small.
  • metal ions are deposited on the intermediate electrode 102 during the reduction of the intermediate product, it is preferable that the adhesiveness with the deposited metal is high. From the viewpoint of adhesion to the deposited metal, it is preferable to use the same metal material as the intermediate product metal. For example, when zinc is used as the intermediate product, it is desirable to use a zinc electrode as the intermediate electrode 102, but it is also possible to use copper, gold, or carbon in addition to zinc.
  • the electrolyte aqueous solution 107 may be an aqueous solution containing metal ions that are intermediate products.
  • An aqueous solution having high solubility of metal ions and high conductivity is desirable.
  • concentration of metal ions in the electrolyte aqueous solution 107 the higher the concentration, the greater the amount of stored electric power, which is preferable.
  • a range of L or less is desirable. Ions other than metal ions may be added to improve conductivity.
  • an alkaline electrolyte aqueous solution generally used in water electrolysis may be used, or an aqueous solution containing metal ions such as an electrolytic plating solution may be used.
  • the electrolytic electrode 103 an electrode whose hydrogen generation potential is higher than the oxidation-reduction potential of the intermediate product is used.
  • the material has a small hydrogen generation overvoltage and oxygen generation overvoltage.
  • a metal material containing one or more of platinum, rhodium, and nickel can be given.
  • the electrode has a high specific surface area in order to promote an electrochemical reaction. Therefore, shapes such as a porous body, a mesh, a punching metal, an expanded metal, and a nonwoven fabric are preferable. Further, roughening or high specific surface area plating may be applied.
  • the partition wall 104 In the operation of the water electrolysis apparatus of the present invention, hydrogen gas and oxygen gas can be generated at different timings in operation, so that the partition wall 104 is not required to have high gas barrier properties. In order to prevent the reverse reaction of the generated gas, the partition wall 104 itself is necessary, but a porous film may be used. Specifically, it is possible to use a low-cost partition wall (for example, a partition wall for plating or a storage battery) that has been used conventionally.
  • a low-cost partition wall for example, a partition wall for plating or a storage battery
  • FIG. 2 is a schematic cross-sectional view showing an example of the configuration of the water electrolysis apparatus according to the second embodiment and the state of operation.
  • the water electrolysis apparatus 201 according to the second embodiment is a three-electrode water electrolysis apparatus in which the electrolytic electrode 103 of the water electrolysis apparatus 101 is divided into a hydrogen generation electrode and an oxygen generation electrode.
  • an intermediate electrode 202 for performing an oxidation-reduction reaction of the intermediate product, and an oxygen gas by water oxidation reaction on one surface side of the intermediate electrode 202 The generated oxygen generating electrolytic electrode 203 and the hydrogen generating electrolytic electrode 204 for generating hydrogen gas by water reduction reaction are installed on the other surface side of the intermediate electrode 202. Similar to the water electrolysis apparatus 101 (FIG. 1), in order to prevent the reverse reaction of the generated gas between the intermediate electrode 202 and the electrolytic electrode (the oxygen generating electrolytic electrode 203 and the hydrogen generating electrolytic electrode 204).
  • a partition wall 205 is provided.
  • the electrolyte aqueous solution 208 contains an intermediate product that repeats a redox reaction between the reductant 206 and the oxidant 207.
  • a power source 209 and a load 210 are connected to the water electrolysis apparatus 201 shown in FIG. 2, and the connection is switched by switching the connection switches 211 and 212, respectively. Specifically, when connecting to the power source 209, the connection switch 212 is turned on and the connection switch 211 is turned off.
  • the connection switch 212 is turned on and the connection switch 211 is turned off.
  • the reduction reaction of the intermediate product is performed on the surface of the intermediate electrode 202 as in the water electrolysis apparatus 101 (FIG. 1).
  • oxygen gas 213 is generated on the surface of the oxygen generating electrolytic electrode 203 by the oxidation reaction of the above formula (1).
  • connection switch 211 when connecting to the load 210, the connection switch 211 is turned on and the connection switch 212 is turned off.
  • the intermediate electrode 202 and the hydrogen generating electrolytic electrode 204 are connected by the load 209 in a state where a predetermined amount of the reductant 207 is stored, an intermediate product is generated on the surface of the intermediate electrode 202 as in the case of the water electrolysis apparatus 101 (FIG. 1). Oxidation reaction of the substance proceeds, and hydrogen gas 214 is generated on the surface of the hydrogen generating electrolytic electrode 204 by the reduction reaction of the formula (2).
  • a hydrogen generation electrolysis electrode 204 having a hydrogen generation potential higher than the oxidation-reduction potential of the intermediate product.
  • oxygen-generating electrolytic electrode 203 in relation to the redox potential of the intermediate product.
  • the bipolar water electrolysis apparatus 101 it is preferable that both the hydrogen generation overvoltage and the oxygen generation overvoltage are small.
  • the oxygen generation electrolysis electrode 203 has an oxygen generation overvoltage. It is sufficient that only the hydrogen generation overvoltage is small. For this reason, in the tripolar water electrolyzer 201, the kind of material which can be used as an electrode increases compared with the bipolar electrolyzer 101.
  • Platinum, rhodium, nickel and iron are examples of materials with a small hydrogen generation overvoltage.
  • Examples of the material having a small oxygen generation overvoltage include platinum, silver, rhodium, nickel, iron, manganese dioxide, cobalt, silver, carbon, and a phthalocyanine complex.
  • the oxygen-generating electrolytic electrode 203 preferably has an area of about 10 to 1000 times the apparent surface area because gaseous oxygen has a low density.
  • a thin film electrode in which high specific surface area particles such as carbon black and metal powder are formed with a binder can be used.
  • oxygen is generated from the electrolytic electrode when power is input, and the reduction reaction of the intermediate product proceeds at the intermediate electrode.
  • the reduced product of the intermediate product is oxidized, and hydrogen is generated at the electrolytic electrode.
  • a voltage equal to the potential difference between the redox potential of the intermediate product and the hydrogen generation potential of the electrolytic electrode is applied to the load, and a current proportional to the amount of hydrogen generation flows. That is, electric power can be taken out simultaneously with hydrogen production. Since the amount of generated power is proportional to the potential difference between the redox potential of the intermediate product and the hydrogen generation potential at the electrolytic electrode, zinc is preferred as the intermediate product, and platinum or nickel and their alloys may be used as the electrolytic electrode. preferable.
  • FIG. 3 is a schematic diagram showing a configuration example of the gas piping of the water electrolysis apparatus according to the present invention.
  • the water electrolysis apparatus of the present invention it is only necessary to connect one flow path (gas pipe) for extracting gas to the electrolytic cell, and the number of pipes can be reduced.
  • this invention does not deny connecting multiple gas piping with respect to an electrolytic cell.
  • Electric power generated by a renewable energy power generation unit such as a wind power generator or solar power generation is usually converted into a desired power form by a power conversion unit and supplied to a power consumer such as a grid power network.
  • a power conversion unit supplied to a power consumer such as a grid power network.
  • the power generated by the renewable energy power generation unit fluctuates, connecting it directly to the grid power grid places a load on the grid and may cause failures such as power outages.
  • FIG. 4 is a schematic diagram showing an example in which a renewable energy storage / supply system using the water electrolyzer according to the present invention is incorporated in an electric power system.
  • the energy storage / supply system of the present invention when used, only power according to demand is passed through the system, and surplus power is input to the water electrolyzer to be converted to hydrogen. It can be stored as energy.
  • Hydrogen produced by the water electrolysis apparatus is added to, for example, organic molecules having a high energy density and stored in a tank as an organic hydride in the reactor of the fuel storage control unit.
  • the water electrolysis apparatus of the present invention since the water electrolysis apparatus of the present invention has a charge / discharge function, it is also possible to supply power from the water electrolysis apparatus when power is insufficient. This makes it possible to compensate for the instability of power derived from renewable energy and level it. Switching between charge and discharge in the water electrolysis apparatus of the present invention can be controlled by, for example, a control unit that monitors the power generation amount of the renewable energy power generation unit.
  • the water electrolyzer of the present invention has a feature that hydrogen is generated at the time of discharging, not at the time of power input, unlike the conventional water electrolyzer. Therefore, it is possible to supply power from the water electrolyzer when power is insufficient, and to supply hydrogen generated in the water electrolyzer directly to the power generation unit.
  • the oxygen generation reaction and the intermediate product reduction reaction are allowed to proceed to store power, and when the renewable energy power generation unit is not generating power, It is also possible to supply electric power by advancing the hydrogen generation reaction and the intermediate product oxidation reaction using the energy stored as the reductant of the intermediate product.
  • Example 1 A water electrolysis apparatus having the configuration shown in FIG.
  • the intermediate electrode 102 was made of a copper mesh, and the electrolytic electrode 103 was made of nickel expanded metal having a high specific surface area.
  • As the aqueous electrolyte solution 107 an aqueous potassium hydroxide solution in which zinc sulfate was dissolved was used.
  • a porous polyethylene thin film was used for the partition 104.
  • Example 2 A water electrolysis apparatus having the configuration shown in FIG. 1 was produced, and after inputting electric power in the same manner as in Example 1, an electronic load was connected to evaluate the characteristics.
  • the intermediate electrode 102 When energized at a current density of 10 mA / cm 2 , the intermediate electrode 102 returned to copper color as in Example 1, and hydrogen bubbles were generated from the surface of the electrolytic electrode 103.
  • the voltage between the intermediate electrode 102 and the electrolytic electrode 103 was 0.45V. From this result, it was confirmed that, in the water electrolysis apparatus having the configuration shown in FIG. 1, after storing input power as the reductant 106, power can be taken out between the intermediate electrode 102 and the electrolytic electrode 103 by connecting a load. It was.
  • Example 3 A water electrolysis apparatus having the configuration shown in FIG. A copper mesh was used for the intermediate electrode 202, an expanded metal of titanium carrying iridium was used for the oxygen generation electrode 203 of the electrolytic electrode, and a platinum mesh was used for the hydrogen generation electrode 204.
  • As the electrolyte aqueous solution 208 a sodium sulfate aqueous solution in which zinc sulfate was dissolved was used.
  • a porous polyethylene thin film was used for the partition wall 205.

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Automation & Control Theory (AREA)
  • Inorganic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
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Abstract

　La présente invention concerne un dispositif d'électrolyse d'eau avec lequel les coûts d'installation peuvent être plus réduits que dans le passé, et un système de stockage d'énergie et d'alimentation en énergie dans lequel le dispositif d'électrolyse d'eau est utilisé. Le dispositif d'électrolyse d'eau pour électrolyser de l'eau et générer de l'hydrogène et de l'oxygène selon la présente invention est caractérisé en ce qu'il comprend : une solution aqueuse d'électrolyte contenant un produit intermédiaire qui subit de façon répétée des réactions d'oxydation-réduction ; une électrode électrolytique pour électrolyser de l'eau ; une électrode intermédiaire pour effectuer les réactions d'oxydation-réduction du produit intermédiaire ; et une cuve électrolytique pour loger la solution aqueuse d'électrolyte, l'électrode électrolytique, et l'électrode intermédiaire ; le produit intermédiaire ayant un potentiel d'oxydation-réduction supérieur aux potentiels de génération d'hydrogène de l'électrode intermédiaire et du produit intermédiaire et inférieur au potentiel de génération d'hydrogène de l'électrode électrolytique.
PCT/JP2014/077142 2013-10-17 2014-10-10 Dispositif d'électrolyse d'eau et système de stockage d'énergie et d'alimentation en énergie utilisant celui-ci WO2015056641A1 (fr)

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FR3079529A1 (fr) * 2018-04-03 2019-10-04 Ergosup Procede electrochimique de production d'hydrogene gazeux sous pression par electrolyse puis par depolarisation
FR3079530A1 (fr) * 2018-04-03 2019-10-04 Ergosup Procede electrochimique de production d'hydrogene gazeux sous pression par electrolyse puis par conversion electrochimique
WO2020141975A1 (fr) 2018-12-31 2020-07-09 Technische Universiteit Delft Cellule électrolytique pour la génération de h2
US11447879B2 (en) 2017-06-27 2022-09-20 University Of Surrey Hydrogen generator
WO2023281002A1 (fr) * 2021-07-07 2023-01-12 Totalenergies Onetech Procédé de génération d'hydrogène par électrolyse de l'eau découplée
WO2023220518A3 (fr) * 2022-05-11 2023-12-21 Nooter/Eriksen, Inc. Génération d'hydrogène et stockage d'énergie chimique
FR3142469A1 (fr) * 2022-11-30 2024-05-31 C3 Chaix Et Associes, Consultants En Technologie Procédé et installation de production de dihydrogène par activation catalytique

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CA3139906C (fr) * 2019-05-31 2024-04-16 Asahi Kasei Kabushiki Kaisha Procede de fonctionnement d'un appareil d'electrolyse
KR102510553B1 (ko) * 2020-11-26 2023-03-16 인하대학교 산학협력단 바나듐 연속 플로우 시스템을 이용한 과전압이 낮은 비대칭 수전해 시스템

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US11447879B2 (en) 2017-06-27 2022-09-20 University Of Surrey Hydrogen generator
FR3079529A1 (fr) * 2018-04-03 2019-10-04 Ergosup Procede electrochimique de production d'hydrogene gazeux sous pression par electrolyse puis par depolarisation
FR3079530A1 (fr) * 2018-04-03 2019-10-04 Ergosup Procede electrochimique de production d'hydrogene gazeux sous pression par electrolyse puis par conversion electrochimique
WO2019193283A1 (fr) * 2018-04-03 2019-10-10 Ergosup Procede electrochimique de production d'hydrogene gazeux sous pression par electrolyse puis par conversion electrochimique
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JP2021520451A (ja) * 2018-04-03 2021-08-19 エルゴスアップ 電気分解、次に脱分極によって加圧気体状水素を製造するための電気化学的方法
CN113454268A (zh) * 2018-12-31 2021-09-28 巴托莱瑟私人公司 用于h2产生的电解池
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WO2020141975A1 (fr) 2018-12-31 2020-07-09 Technische Universiteit Delft Cellule électrolytique pour la génération de h2
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