WO2006114034A1 - Procédé électrochimique de fabrication et de stockage d’hydrogène par oxydoréduction de zinc et d’eau - Google Patents

Procédé électrochimique de fabrication et de stockage d’hydrogène par oxydoréduction de zinc et d’eau Download PDF

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Publication number
WO2006114034A1
WO2006114034A1 PCT/CN2006/000090 CN2006000090W WO2006114034A1 WO 2006114034 A1 WO2006114034 A1 WO 2006114034A1 CN 2006000090 W CN2006000090 W CN 2006000090W WO 2006114034 A1 WO2006114034 A1 WO 2006114034A1
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WIPO (PCT)
Prior art keywords
electrode
zinc
hydrogen
metal
gas
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Application number
PCT/CN2006/000090
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English (en)
Chinese (zh)
Inventor
Chao Huang
Original Assignee
Huang, Hao
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.)
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Publication date
Application filed by Huang, Hao filed Critical Huang, Hao
Priority to US11/912,213 priority Critical patent/US20080190781A1/en
Priority to JP2008508052A priority patent/JP2008539328A/ja
Publication of WO2006114034A1 publication Critical patent/WO2006114034A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M16/00—Structural combinations of different types of electrochemical generators
    • H01M16/003—Structural combinations of different types of electrochemical generators of fuel cells with other electrochemical devices, e.g. capacitors, electrolysers
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/0005—Reversible uptake of hydrogen by an appropriate medium, i.e. based on physical or chemical sorption phenomena or on reversible chemical reactions, e.g. for hydrogen storage purposes ; Reversible gettering of hydrogen; Reversible uptake of hydrogen by electrodes
    • C01B3/001—Reversible uptake of hydrogen by an appropriate medium, i.e. based on physical or chemical sorption phenomena or on reversible chemical reactions, e.g. for hydrogen storage purposes ; Reversible gettering of hydrogen; Reversible uptake of hydrogen by electrodes characterised by the uptaking medium; Treatment thereof
    • C01B3/0026—Reversible uptake of hydrogen by an appropriate medium, i.e. based on physical or chemical sorption phenomena or on reversible chemical reactions, e.g. for hydrogen storage purposes ; Reversible gettering of hydrogen; Reversible uptake of hydrogen by electrodes characterised by the uptaking medium; Treatment thereof of one single metal or a rare earth metal; Treatment thereof
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/0005—Reversible uptake of hydrogen by an appropriate medium, i.e. based on physical or chemical sorption phenomena or on reversible chemical reactions, e.g. for hydrogen storage purposes ; Reversible gettering of hydrogen; Reversible uptake of hydrogen by electrodes
    • C01B3/001—Reversible uptake of hydrogen by an appropriate medium, i.e. based on physical or chemical sorption phenomena or on reversible chemical reactions, e.g. for hydrogen storage purposes ; Reversible gettering of hydrogen; Reversible uptake of hydrogen by electrodes characterised by the uptaking medium; Treatment thereof
    • C01B3/0031—Intermetallic compounds; Metal alloys; Treatment thereof
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
    • H01M8/0606—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants
    • H01M8/065—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants by dissolution of metals or alloys; by dehydriding metallic substances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/40—Combination of fuel cells with other energy production systems
    • H01M2250/402—Combination of fuel cell with other electric generators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
    • H01M8/0606—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants
    • H01M8/0656—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants by electrochemical means
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/10—Applications of fuel cells in buildings
    • 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
    • Y02E60/32—Hydrogen storage
    • 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
    • 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
    • Y02E60/50—Fuel cells

Definitions

  • the invention belongs to the technology of storing and manufacturing hydrogen energy, and particularly relates to a method for hydrogen production and hydrogen storage by electrochemical zinc-water.
  • the object of the present invention is to provide an electrochemical zinc-water hydrogen production and hydrogen storage method which is safe, convenient, and low in cost, and can be repeatedly used by a zinc electrode.
  • the method adopted by the present invention is:
  • a closed system consisting of a gassing electrode, an electrolyte and a zinc electrode, and the gassing electrode and the zinc electrode are connected to an external circuit.
  • the gas-discharging electrode and the external circuit of the zinc electrode are turned on, and a water reduction reaction occurs on the gas-sparing electrode to release hydrogen gas, and zinc oxidation reaction occurs on the zinc electrode to form an oxidation product of zinc.
  • Disconnect the external circuit that is, stop releasing hydrogen; when storing hydrogen '' gas, first add water to the closed system, connect the negative pole of the external power supply to the external circuit of the zinc electrode, and connect the positive pole of the external power supply to the external circuit of the gas-dissolving electrode, with DC
  • the zinc electrode is reduced on the zinc electrode, the zinc oxide is reduced to zinc, the zinc electrode is restored, and the water is oxidized by the gassing electrode to generate oxygen.
  • the gassing electrode used in the present invention is composed of a hydrogen evolution electrode and an oxygen evolution electrode, or a hydrogen evolution electrode and an oxygen evolution electrode.
  • the former uses an oxygen evolution electrode-electrolyte-zinc electrode-electricity-hydrogen evolution electrode system.
  • the hydrogen evolution electrode and the zinc electrode external circuit are connected.
  • the negative electrode of the external power source is connected to the external circuit of the zinc electrode.
  • the positive electrode is connected to the external circuit of the electrode.
  • the latter uses a zinc electrode, an electrolyte, a hydrogen evolution electrode, and a system for oxygen gas formation.
  • the zinc electrode and the hydrogen evolution electrode are combined with the oxygen electrode.
  • Road when storing hydrogen, connect the negative electrode of the power supply to the external electrode of the zinc electrode. 3 ⁇ 4 ⁇ "The positive electrode is connected to the external circuit of the hydrogen evolution electrode and the oxygen evolution electrode.”
  • the electrolyte of the present invention generally employs a strong alkaline electrolyte aqueous solution because the zinc electrode has good reversibility and strong current discharge capability under a strong alkaline aqueous solution.
  • a strong alkaline electrolyte illustrating the principle of electrochemical reaction occurring in the hydrogen-and hydrogen storage system of the zinc-water system of the present invention:
  • a certain voltage can be obtained in the external circuit.
  • the current, the theoretical potential is 0.42-0.43 volts, and the current that is controlled by the external circuit can be easily controlled to control the amount of hydrogen released.
  • zinc discharge can produce a zinc oxidation product different from ⁇ 11 (0 2 or 2110, but the charge and discharge process of hydrogen production and hydrogen storage is Principle, consistent with the above example:
  • the zinc electrode used in the hydrogen storage and hydrogen production method of the present invention is composed of a zinc active material, a binder, an additive, a current collector, a paste, a paste, a sintering, a box (tube), a foaming, an electrodeposition technique, and the like.
  • the zinc active material may be composed of zinc alloy powder, zinc oxide, zinc hydroxide, zincate or the like or a combination thereof;
  • the binder may be carboxymethyl cellulose (CMC), Polyhexafluoroethylene (PTFE) emulsion, polyvinyl alcohol (FVA), propylmethylcellulose (HPMC), polyethylene oxide (PEO), polyacrylic acid (PAA), polyvinylidene fluoride (PVDF:), six a mixture of one or more of the above binders such as fluoropropene; additives such as zinc oxide, calcium oxide, magnesium oxide, cadmium oxide, aluminum oxide, steel compounds, antimony compounds, lead compounds, calcium hydroxide, graphite Powder, acetylene black, carbon powder, - ⁇ black, activated carbon powder, chopped fiber, carbon fiber, etc., or a mixture of the above;
  • the current collector can be made of foam metal, metal mesh, metal pedicle ( metal Be a 1 Ah 'or alloy), and plated metal surface, or
  • the electrolyte used in the hydrogen storage and hydrogen production method of the present invention is an aqueous solution of an aqueous solution, and is impregnated with a battery separator.
  • the aqueous solution electrolyte is a solution having a pH of more than 4 and a concentration of 0.05 Mol/L-15Mo]/L, and an alkali metal or alkaline earth metal hydroxide aqueous solution or a mixture thereof may be used, preferably KOH, NaOH aqueous solution or a mixture thereof; or alkali is used.
  • the separator may be: a hydrated cellulose film, a polyethylene graft film, a cellophane, a nylon cloth. , one of hydrated cellulose paper, cotton paper, potassium titanate paper, polyethylene felt, zirconia fiber paper, vinylon non-woven fabric, or the like, or a composite film made of one or more materials.
  • the hydrogen evolution electrode used in the present invention can be produced by a variety of methods using an active hydrogen evolution electrode having a very low hydrogen evolution overpotential.
  • Active hydrogen evolution electrode is a composite material of pure metal, metal oxide, alloy or metal and alloy and oxide. It is electroplated, composite plating, thermal decomposition, ion plating, ion implantation, ion sputtering, electroless plating, metal foam technology. It can be made by a variety of chemical methods, or it can be made by combining the above two or three technologies.
  • the 3 ⁇ 41 can be various forms of pure metals such as Ni, Co, Fe, Mo, 3 ⁇ 4 ⁇ pt, Pd, Ru and other low hydrogen over potential of the metal; may be an oxide, such as Ru0 2, Ti0 2, Zr0 2, etc. '; may also be an alloy, such as Ni- Mo, Ni- B, Ni- P , Ni - NiS, Ni-Pt, Ni-Ru, Co-Mo, i-Wo, i--Sn, Mo-W, Co-W, Ni-hydrogen storage alloy, and Ni-P-Co-Mo-W, Ni-Co - Mo, ⁇ i - o-.Vlo-H ⁇ Ni P-Mo - Co, Ni- P- W, Ni- P- Co- Mo- W, Ni- B- Co, Ni- B - Mo , ⁇ i -H-Co- ⁇ lo, Ni B- Co- .Mo- «', Ni- B- W, Ni- Co-hydrogen storage alloy, etc.;
  • the electrode is made of metal steel, iron, nickel mesh, belt, sheet, sheet, foam metal, ⁇ is coated with Ni or sulfur-plated Ni, or it has special catalytic effect on oxygen evolution.
  • the hydrogen evolution electrode and oxygen evolution electrode used in the present invention can be formed on a metal steel, iron, nickel mesh, belt, sheet, sheet, or foam metal structure by Ni plating or sulfur plating Ni physical chemical treatment. . ⁇ '
  • the hydrogen evolution electrode, the oxygen evolution electrode, and the hydrogen evolution and oxygen evolution electrode may have various structures such as a sheet shape, a mesh shape, and a porous shape, and a gas diffusion electrode structure similar to a fuel cell electrode may be selected.
  • the following two devices can be manufactured:
  • a hydrogen evolution electrode, a zinc electrode, and an oxygen evolution electrode are disposed, and each of the pole chambers is filled with a suction/dip separator, and the electrodes are separated, and an external circuit is connected outside each electrode, and a liquid injection port is provided on the liquid storage tank for supplementing the electrolyte
  • the hydrogen collecting chamber is provided with a hydrogen outlet
  • a buffer tank is arranged under the electrolytic cell system to ensure the liquid level of the electrolyte in the electrolytic cell system is uniform.
  • the diversion tube at the bottom of the sump flows into each of the pole chambers and the buffer tank in the electrolytic cell system, and the external circuit of the zinc electrode and the hydrogen evolution electrode is turned on and formed, and a large amount of hydrogen gas is generated on the hydrogen evolution electrode, and the hydrogen gas is collected in the hydrogen collection chamber. It gathers and flows out through the hydrogen outlet.
  • the external positive and negative ends of the hydrogen production system will simultaneously output electrical energy, and the external circuit of the zinc electrode and the hydrogen evolution electrode will be disconnected, and the system stops hydrogen production; when hydrogen is required to be stored, First, sufficient water is supplied to the electrolytic cell system through the liquid injection port, and then the positive electrode of the external power source is connected to the external circuit of the oxygen evolution electrode, the negative electrode is connected to the external circuit of the zinc electrode, and the direct current is applied to the zinc electrode, and the zinc electrode starts to reduce and form zinc, and the oxygen evolution electrode starts to be large. Oxygen is produced, and oxygen is discharged through the oxygen outlet.
  • an electrolytic cell system Located above the hydrogen collecting chamber, an electrolytic cell system is arranged under the hydrogen collecting chamber, which is composed of a plurality of polar chambers, and the number of the polar chambers is determined according to the amount of hydrogen generated and the rate of hydrogen release, and each of the polar chambers is The zinc electrode, the hydrogen evolution electrode and the oxygen evolution electrode are arranged, and they are not connected to each other, and each electrode is connected with an external circuit.
  • Each of the pole chambers is filled with a suction membrane, and the electrodes are separated, and the electrodes are external.
  • An external circuit is connected to the liquid storage tank for filling the electrolyte or water, and the hydrogen collecting chamber is provided with a hydrogen outlet port, and a buffer tank is arranged under the electrolytic cell system for ensuring the discharge of the electricity system.
  • the liquid level is the same.
  • the hydrogen gas is collected in the hydrogen collection chamber and flows out through the hydrogen outlet.
  • the external positive and negative ends of the hydrogen production system will simultaneously output electrical energy, and only need to disconnect the zinc electrode and the hydrogen evolution electrode.
  • the system stops hydrogen production; when it is necessary to store hydrogen, 'first fill the electrolyte through the liquid injection port.
  • the system is filled with sufficient water, then the positive electrode of the external power supply is connected to the external circuit of the oxygen evolution electrode, and the negative electrode is connected to the external electrode of the zinc electrode.
  • the zinc electrode begins to reduce and form zinc.
  • the hydrogen evolution and oxygen evolution electrode begins to generate a large amount of oxygen, and the oxygen is directly discharged through the oxygen outlet.
  • the invention adopts electrochemical technology, and adopts a hydrogen-making and hydrogen storage system formed by a combination of a zinc electrode and a gassing electrode in the electrolyte, and develops a new concept of efficient, safe and inexpensive reusable electricity.
  • the chemical zinc-hydrogen production and hydrogen storage system is obviously different from the traditional hydrogen sources, and it is manifested in the following aspects:
  • the body can be large or small.
  • the hydrogen storage hydrogen production can be carried out at normal temperature and pressure, and belongs to the electric 'pool' reaction. It is only necessary to control the current to control the amount of hydrogen produced, and it is extremely quick and convenient to start and shut down.
  • the system of the invention can be modularized, convenient to disassemble and assemble. Can be made into a miniature, small hydrogen source. It can also be combined into a large mobile or stationary hydrogen source.
  • Zinc itself has a high energy storage density, and the hydrogen produced under the condition of strong alkali electrolyte has high purity and can work under low temperature conditions, and is widely used.
  • the system Since the system is essentially an electrochemical reaction between zinc and water, the system stores water and zinc, which is much less expensive than hydrogen storage alloys, and has a rich zinc resource. Due to the use of flawless raw materials, it is safe and reliable and will not cause environmental pollution. '
  • iL] can store hydrogen energy in this system by charging method, no need to set up hydrogen refueling station, gas cylinder Inconvenient hydrogen source. At the same time, only electricity and water are needed to store hydrogen. And can be used multiple times in a loop.
  • the present invention has excellent application value in mobile and portable hydrogen sources. It is especially suitable for supplying hydrogen to hydrogen fuel cells. It can also use its by-produced electric energy to supply electricity together with fuel cells.
  • the invention is also suitable for the following technical fields: providing a convenient mobile hydrogen source for laboratories, welding equipment, etc.; for heat source, field lighting, etc. under the conditions of electricity, hydrogen sharing or single use.
  • the invention can also be applied to energy storage, for example: storage of excess power during low peak period and power storage of solar power generation, and energy storage mode is hydrogen and electric energy storage.
  • conductive carbon black 1.5g, zinc oxide 6.0g, mercury-free zinc powder 1.5g, polyvinyl alcohol 3% aqueous solution 3.3ml, sodium carboxymethyl cellulose 2% aqueous solution 25ml, polytetrafluoroethylene (PTFE) emulsion 4ml (10% mass concentration), stir well, heat into a mass, and roll into a sheet. Pressed on a 60 mesh brass wire for the zinc electrode, . Shanghai Shilong Company?
  • PTFE polytetrafluoroethylene
  • the film is a separator
  • the foamed nickel sheet is an oxygen evolution electrode
  • the Pt/C (platinum supported on conductive carbon black) catalyst foamed nickel sheet is a hydrogen evolution electrode
  • 5Mol/LK ⁇ The H aqueous solution is an electrolyte, and the electrolyte floods most of the bungee.
  • the effective area of the electrode of the single cell is 5 square centimeters.
  • Constant current charging The zinc electrode is connected to the negative electrode, the foamed nickel piece is connected to the positive electrode, the current is 50 mA, charged for 3 hours, and allowed to stand for 15 minutes after charging.
  • the positive gas is gas
  • the two poles are not allowed to produce gas.
  • Discharge gas production The zinc electrode is the negative electrode, and the foamed nickel sheet coated with the Pt/C catalyst is the positive electrode.
  • the discharge current and voltage are measured by a multimeter.
  • the circuit is turned on, and the current reaches 0.5 amps at the beginning of the discharge, accompanied by the sharp production of bubbles, and the gas production reaches 3.3 ml per minute.
  • the current is reduced and the gas production is reduced. Turn off the circuit in the middle, stop the gas production, and turn on the circuit, that is, restore the gas production.
  • the charge and discharge are repeated three times, the current and voltage do not change much, and the phenomenon does not change.
  • the EPAT-AS-SL8 film is The battery separator, the foamed nickel sheet is a hydrogen evolution and oxygen evolution electrode, and the 0.5 Mol/L NaOH aqueous solution is an electrolyte, and the electrolyte floods most of the electrodes.
  • the effective area of the single cell electrode is 10 square centimeters. .
  • Constant current charging The zinc electrode is connected to the negative electrode, the foamed nickel piece is connected to the positive electrode, the current is 60 mA, and it is charged for 5 hours. After charging, it is allowed to stand for 15 minutes. When charging, the positive gas is gas, and the two poles are not allowed to produce gas.
  • the zinc electrode is the negative electrode
  • the foamed nickel plate is the positive electrode.
  • the discharge current and voltage are detected by a multimeter.
  • the circuit is turned on, the discharge current is 70mA, and the voltage is 46mV. Soon, the positive bubble appeared and the discharge current was 36mA ⁇ after 2 hours of discharge, and the i ii pressure was still 65mV. .
  • the cell electrode has an effective area of 12 square centimeters.
  • Constant current charging The zinc electrode is connected to the negative electrode, the foamed nickel piece is connected to the positive electrode, the current is 100 mA, and it is charged for 5 hours. After charging, it is allowed to stand for 15 minutes. When charging, the positive electrode is gas-filled, and the two poles are not gas-producing.
  • the zinc electrode is the negative electrode and the foamed nickel plate is the positive electrode.
  • the discharge current and voltage are detected by a multimeter. At the beginning of the discharge, the current reaches 0.5 amps, and after 1 hour, it can reach 0.1 amps, and 3 hours and 30 minutes are 62 mA.
  • the discharge started with the sharp production of bubbles, and the gas production reached 3.3 ml per minute.
  • the current is reduced and the gas production is reduced. Turn off the circuit in the middle, stop the gas production, turn on the circuit, and resume the gas production on the nickel.

Abstract

La présente invention concerne un procédé électrochimique de fabrication et de stockage d’hydrogène par oxydoréduction de zinc et d’eau. Le procédé comprend un système fermé composé d’une électrode génératrice de gaz, d’un électrolyte et d’une électrode de zinc, l’électrode génératrice de gaz et l’électrode de zinc étant connectées respectivement à des circuits externes, système caractérisé en ce que, lors de la fabrication d’hydrogène, les circuits externes sont connectés, l’eau est réduite en hydrogène sur l’électrode génératrice de gaz et le zinc est oxydé en oxyde de zinc sur l’électrode de zinc ; lors du stockage d’hydrogène, on applique une quantité d’eau suffisante au système fermé, et l’on connecte le pôle négatif de la source d’alimentation au circuit externe de l’électrode de zinc, et l’on connecte le pôle positif de la source d’alimentation au circuit externe de l’électrode génératrice de gaz, avant d’appliquer le courant, l’oxyde de zinc est réduit en zinc sur l’électrode de zinc, et l’eau est oxydée en oxygène sur l’électrode génératrice de gaz, avant de libérer l’oxygène. Le procédé a un domaine d’application large et son fonctionnement est très simple, il convient en particulier à une source d’hydrogène pour pile à combustible d’hydrogène, et la puissance électrique ainsi générée peut également servir à générer de l’électricité avec la pile à combustible.
PCT/CN2006/000090 2005-04-28 2006-01-20 Procédé électrochimique de fabrication et de stockage d’hydrogène par oxydoréduction de zinc et d’eau WO2006114034A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US11/912,213 US20080190781A1 (en) 2005-04-28 2006-01-20 Electrochemical Method for Producing and Storing Hydrogen by the Redox of Zinc and Water
JP2008508052A JP2008539328A (ja) 2005-04-28 2006-01-20 亜鉛と水の酸化還元によって水素を生成及び吸蔵するための電気化学的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200510046374.8 2005-04-28
CNA2005100463748A CN1854063A (zh) 2005-04-28 2005-04-28 电化学锌－水制氢、储氢方法

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WO2006114034A1 true WO2006114034A1 (fr) 2006-11-02

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US (1) US20080190781A1 (fr)
JP (1) JP2008539328A (fr)
CN (1) CN1854063A (fr)
WO (1) WO2006114034A1 (fr)

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US8142743B2 (en) 2009-06-25 2012-03-27 Industrial Technology Research Institute Method and apparatus for forming zinc oxide
CN105765007A (zh) * 2013-11-19 2016-07-13 巴斯夫涂料有限公司 用于浸涂导电基底的包含氧化镁的水性涂料组合物
US10164262B2 (en) 2010-12-08 2018-12-25 Sumitomo Electric Industries, Ltd. Method for producing a porous metal body
WO2023281002A1 (fr) * 2021-07-07 2023-01-12 Totalenergies Onetech Procédé de génération d'hydrogène par électrolyse de l'eau découplée

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CN101560668A (zh) * 2008-04-17 2009-10-21 黄潮 电化学锌-水制氢储氢系统及其应用
JP5759169B2 (ja) * 2010-12-24 2015-08-05 住友電気工業株式会社 高耐食性を有する金属多孔体及びその製造方法
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