CN114381751A - Low-energy-consumption continuous separation Mg-H2Method for preparing O battery electrolyte - Google Patents
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 105
- 238000000926 separation method Methods 0.000 title claims abstract description 35
- 238000005265 energy consumption Methods 0.000 title claims abstract description 22
- 239000012528 membrane Substances 0.000 claims abstract description 51
- 239000008151 electrolyte solution Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000007599 discharging Methods 0.000 claims abstract description 8
- 238000004064 recycling Methods 0.000 claims abstract description 8
- 238000003860 storage Methods 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims abstract description 6
- 239000002244 precipitate Substances 0.000 claims abstract description 6
- 239000000725 suspension Substances 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 229910019080 Mg-H Inorganic materials 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- -1 polypropylene Polymers 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 5
- 239000004695 Polyether sulfone Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000006227 byproduct Substances 0.000 claims description 3
- 229920002301 cellulose acetate Polymers 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229920006393 polyether sulfone Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 8
- 239000001257 hydrogen Substances 0.000 abstract description 8
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- ZATZOOLBPDMARD-UHFFFAOYSA-N magnesium;hydrate Chemical compound O.[Mg] ZATZOOLBPDMARD-UHFFFAOYSA-N 0.000 abstract description 3
- 239000011777 magnesium Substances 0.000 description 21
- 238000006243 chemical reaction Methods 0.000 description 9
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
- 229910000861 Mg alloy Inorganic materials 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- FZRNJOXQNWVMIH-UHFFFAOYSA-N lithium;hydrate Chemical compound [Li].O FZRNJOXQNWVMIH-UHFFFAOYSA-N 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
- 239000000347 magnesium hydroxide Substances 0.000 description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- IPCXNCATNBAPKW-UHFFFAOYSA-N zinc;hydrate Chemical compound O.[Zn] IPCXNCATNBAPKW-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- XFBXDGLHUSUNMG-UHFFFAOYSA-N alumane;hydrate Chemical compound O.[AlH3] XFBXDGLHUSUNMG-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000010411 electrocatalyst Substances 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000010416 ion conductor Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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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
- 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
- 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
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
- C25B15/085—Removing impurities
-
- 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
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
- C25B15/087—Recycling of electrolyte to electrochemical cell
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/30—Deferred-action cells
- H01M6/32—Deferred-action cells activated through external addition of electrolyte or of electrolyte components
- H01M6/34—Immersion cells, e.g. sea-water cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0002—Aqueous electrolytes
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
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Abstract
The invention discloses a method for continuously separating Mg-H2O battery electrolyte with low energy consumption, which comprises the following steps: Mg-H2O cell unit, pump, membrane separation unit and electrolyte tank in Mg-H2The lower part of the O battery device is provided with an electrolyte outlet valve, and the electrolyte outlet valve is opened to contain Mg (OH)2Discharging the electrolyte of the suspended matter to a storage tank at the lower part; the storage tank contains Mg (OH) by the action of a pump2The electrolyte of the suspension is conveyed to a membrane separation unit, which realizes Mg (OH)2Separating the precipitate to obtain clean electrolyte solution, conveying the clean electrolyte solution to an electrolyte tank, and mixing the clean electrolyte solution with fresh electrolyte in the electrolyte tank; the electrolyte solution in the electrolyte tank is injected under the action of the pumpMg‑H2And the O battery device realizes the recycling of the electrolyte. The invention can timely remove Mg (OH) formed in the electrolyte2The suspended matters are removed, so that the increase of the internal resistance of the battery is effectively avoided, the heat effect of the battery device is effectively controlled, and the power output and the hydrogen production of the magnesium-water battery are effectively improved; realizable Mg (OH)2And the electrolyte is separated, so that the recycling of the electrolyte is realized.
Description
Technical Field
The invention relates to the technical field of electrolyte, in particular to a method for continuously separating Mg-H2O battery electrolyte with low energy consumption.
Background
Shipping is an important transportation method, and the combustion of a large amount of fossil fuel causes the discharge of a large amount of waste gas and oily sewage. With the promotion of energy-saving and emission-reducing policies of various countries, the development of novel green ship power devices is urgent. In recent years, researchers have proposed a series of metal-water batteries, such as lithium-water, aluminum-water, zinc-water, etc., in which the anode is an active metal, and in the alkaline electrolyte, the anode loses electrons, and the electrons pass through an external circuit to drive the cathode to generate HER electrocatalytic reaction to produce hydrogen. The battery system is a hydrogen-electricity integrated device capable of producing hydrogen and generating electricity, and has the advantages of low cost, environmental friendliness, strong practicability and the like.
Among many metal-water hydrogen production systems, lithium-water batteries require the use of organic electrolytes and expensive lithium ion conductor (LiSICON) membranes, and the shortage of lithium resources limits their development; the zinc-water battery has lower voltage, and in order to improve the working voltage, Wen et al propose a double-electrolyte methodThe oxygen evolution reaction takes place in alkaline solution, the hydrogen evolution reaction takes place under acidic condition, the middle is separated by a bipolar membrane, and 10mA cm can be provided under the voltage of 1.12V-2But the introduction of a bipolar membrane additionally increases the cost of the battery. In contrast, magnesium metal has the advantages of high electrode potential, abundant sources, low price and the like, and has been successfully used for magnesium dissolved oxygen seawater batteries. The magnesium-water battery is characterized in that metal magnesium or magnesium alloy is used as an anode, a hydrogen evolution electrocatalyst is used as a cathode, an aqueous solution is used as electrolyte, and the battery electrode and the total reaction equation are as follows:
and (3) anode reaction: mg +2OH-→Mg(OH)2+2e-
And (3) cathode reaction: 2H2O+2e-→H2+2OH-
And (3) total reaction: mg +2H2O→Mg(OH)2+H2
Flocculent Mg (OH) is continuously contained in the electrolyte in the charging and discharging processes of the battery2Production, Mg (OH)2The gradual accumulation causes the rapid increase of the internal resistance of the battery, the heat effect of the battery is enhanced, and the stability, hydrogen production performance and power generation performance of the battery system are seriously influenced. In addition, Mg (OH) in the electrolyte2If not removed in time, Mg-H can not be realized2Continuous operation of the O battery.
Disclosure of Invention
The invention aims to provide a method for continuously separating Mg-H2O battery electrolyte with low energy consumption, which can realize Mg-H2Continuous operation of the O battery and recycling of the electrolyte.
In order to achieve the purpose, the invention provides the following technical scheme: a method for low energy consumption continuous separation of Mg-H2O battery electrolyte, comprising: Mg-H2O battery device, pump, membrane separation unit and electrolyte case, its step is:
step 1: in Mg-H2The lower part of the O battery device is provided with an electrolyte outlet valve, and the electrolyte outlet valve is opened to contain Mg (OH)2Discharging the electrolyte of the suspended matter to a storage tank at the lower part;
step 2: the storage tank contains Mg (OH) by the action of a pump2The electrolyte of the suspension is conveyed to a membrane separation unit, which realizes Mg (OH)2Separating the precipitate to obtain clean electrolyte solution, conveying the clean electrolyte solution to an electrolyte tank, and mixing the clean electrolyte solution with fresh electrolyte in the electrolyte tank;
and step 3: the electrolyte solution in the electrolyte tank is injected with Mg-H under the action of a pump2And the O battery device realizes the recycling of the electrolyte.
Preferably, in said Mg-H2O cell devices containing Mg (OH)2The discharging of electrolyte and the injection continuous type of pure electrolyte go on, and the discharge amount is regulated and control through electrolyte outlet valve opening, and the injection volume passes through rotor flow meter control, guarantees among the battery device that electrolyte liquid level height is invariable, exceeds polar plate 15 ~ 20mm all the time to maintain the equilibrium stability of Mg-H2O battery.
Preferably, wherein the electrolyte outlet valve may be one of a butterfly valve, a ball valve and a straight-through regulating valve.
Preferably, the electrolyte outlet valve is further preferably a butterfly valve, and the butterfly valve opening is preferably 40% to 60%.
Preferably, the membrane separation unit and the filtration membrane are preferably polypropylene membranes, cellulose acetate membranes, polyethersulfone membranes, polytetrafluoroethylene membranes or ceramic membranes.
Preferably, the pore diameter of the filtration membrane of the membrane separation unit is preferably 20nm to 5 μm.
Preferably, the pore diameter of the filtration membrane of the membrane separation unit is further preferably 200 nm.
Preferably, the transmembrane pressure difference of the filtering membrane of the membrane separation unit is 0.2-1 bar.
Preferably, it is also applicable to Zn-H2O and Al-H2O is easy to generate a precipitate by-product, and the electrolyte is separated and recycled.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can timely remove Mg (OH) formed in the electrolyte2The suspended matters are removed, the increase of the internal resistance of the battery is effectively avoided, the heat effect of the battery device is effectively controlled, and the power output and power generation of the magnesium-water battery are effectively improvedElectrical hydrogen production.
2. The invention can realize Mg (OH)2And the electrolyte is separated, so that the recycling of the electrolyte is realized.
Drawings
FIG. 1 is Mg-H of the present invention2O battery electrolyte purification and recycling system diagram;
FIG. 2 is Mg-H of the present invention2Open circuit voltage of performance map of O cell;
FIG. 3 is Mg-H of the present invention2A constant current discharge curve at different current densities for a performance plot for an O-cell;
FIG. 4 is a graph of the performance of the Mg-H2O cell of the invention at a current density of 10mA cm-2Long period discharge performance;
FIG. 5 is a schematic representation of the Mg (OH) content of the Mg-H2O cell electrolyte of the present invention2A particle size distribution map;
FIG. 6 is a schematic representation of the Mg (OH) content of the Mg-H2O cell electrolyte of the present invention2Effect graphs before and after membrane separation;
FIG. 7 is a diagram showing the effects of the electrolyte recovery method of the present invention before and after the separation of Zn-H2O battery membranes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 7, the present invention provides 5 technical solutions: a method for continuously separating Mg-H2O battery electrolyte with low energy consumption.
Example 1
As shown in FIG. 1, a low energy consumption method for continuously separating Mg-H2O battery electrolyte2The lower part of the O battery device is provided with an electrolyte outlet valve, and the electrolyte outlet valve is opened to contain Mg (OH)2Discharging electrolyte of the suspension into the lower storage tank to maintain the electricity of the battery systemSupplying electrolyte, simultaneously starting a circulating pump to inject pure electrolyte in the electrolyte tank, and avoiding the generation of Mg (OH) due to the scouring and disturbance effect formed by the injection of the upper electrolyte2Covering the electrode surface to hinder further electrochemical reactions and to contribute to Mg (OH)2Is discharged.
The storage tank contains Mg (OH)2The electrolyte of the suspension is introduced into the membrane separation unit by the suction force of the pump to realize Mg (OH)2And precipitating and separating, recovering the pure electrolyte solution, and conveying the pure electrolyte solution to an electrolyte tank to realize the recycling of the electrolyte.
The Mg-H2O cell device containing Mg (OH)2The discharge of suspended solid electrolyte and the injection continuous type of fresh electrolyte go on, and the discharge amount is regulated and control through electrolyte outlet valve opening, and the injection volume passes through rotor flow meter control, guarantees among the battery device that electrolyte liquid level height is invariable, exceeds polar plate 15 ~ 20mm all the time to maintain Mg-H2Equilibrium stability of O cells.
The electrolyte outlet valve is preferably a butterfly valve, a ball valve or a straight-through regulating valve, more preferably a butterfly valve, and the opening of the butterfly valve is preferably 40-60%.
In the membrane separation unit, the filtering membrane is preferably a polypropylene membrane, a cellulose acetate membrane, a polyether sulfone filtering membrane, a polytetrafluoroethylene membrane or a ceramic membrane.
In the membrane separation unit, the filtering membrane preferably has a pore size of 20nm to 5 μm, and more preferably 200 nm;
in the membrane separation unit, the transmembrane pressure difference of the filtering membrane is preferably 0.2-1 bar.
The low-energy-consumption continuous separation of Mg-H2Method of O battery electrolyte, applicable to Zn-H2O、 Al-H2O and the like, and the electrolyte which can generate a precipitation byproduct is separated and recycled.
Example 2
A method for continuously separating Mg-H2O battery electrolyte with low energy consumption is characterized in that a commercial Pt/C catalyst is used as a cathode, a magnesium alloy plate AZ31B is used as an anode, 1M NaCl is used as the electrolyte, and Mg-H is assembled2O cells were tested for electrochemical performance.Open circuit voltage test, as shown in fig. 2, the open circuit voltage of the battery was 1.07V.
Example 3
A method for continuously separating Mg-H2O battery electrolyte with low energy consumption is characterized in that a commercial Pt/C catalyst is used as a cathode, a magnesium alloy plate AZ31B is used as an anode, and 1M NaCl is used as the electrolyte, and the Mg-H2O battery is assembled to carry out electrochemical performance test. Constant current charge and discharge tests were performed at different current densities, as shown in fig. 3. The working voltage of the battery is reduced along with the increase of the current density, and the highest output power is 9.72mW/cm2。
Example 4
A method for continuously separating Mg-H2O battery electrolyte with low energy consumption is characterized in that a commercial Pt/C catalyst is used as a cathode, a magnesium alloy plate AZ31B is used as an anode, 1M NaCl is used as the electrolyte, and Mg-H is assembled2O cells were tested for electrochemical performance. During the test, it was found that the metal Mg was continuously consumed to generate a large amount of Mg (OH)2Suspended matter, the particle size of which is shown in fig. 5, the electrolyte solution gradually changed from clear to milky white as shown in fig. 6. The milky white electrolyte solution obtained after the reaction permeates through the membrane separation unit, and clear electrolyte can be obtained and can be further used for Mg-H2An O-cell system.
Example 5
A method for continuously separating electrolyte of a Mg-H2O battery with low energy consumption is also suitable for a Zn-H2O battery, a commercial Pt/C catalyst is used as a cathode, a high-purity zinc sheet is used as an anode, 1M NaCl is used as the electrolyte, the Zn-H2O battery is assembled to carry out electrochemical performance test, and the electrochemical performance test is carried out at 2mA cm/cm-2The operating voltage at current density is about 0.15V. During the test it was found that metallic Zn was continuously consumed, producing a large amount of white floc precipitates, as shown in fig. 7. The electrolyte solution after reaction permeates through the membrane separation unit, and clear electrolyte can be obtained, and the electrolyte can be further used for a Zn-H2O battery system.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. Low-energy-consumption continuous separation Mg-H2A method of O-cell electrolyte comprising: Mg-H2O battery device, pump, membrane separation unit and electrolyte case, its step is:
step 1: in Mg-H2The lower part of the O battery device is provided with an electrolyte outlet valve, and the electrolyte outlet valve is opened to contain Mg (OH)2Discharging the electrolyte of the suspended matter to a storage tank at the lower part;
step 2: the storage tank contains Mg (OH) by the action of a pump2The electrolyte of the suspension is conveyed to a membrane separation unit, which realizes Mg (OH)2Separating the precipitate to obtain clean electrolyte solution, conveying the clean electrolyte solution to an electrolyte tank, and mixing the clean electrolyte solution with fresh electrolyte in the electrolyte tank;
and step 3: the electrolyte solution in the electrolyte tank is injected with Mg-H under the action of a pump2And the O battery device realizes the recycling of the electrolyte.
2. Low energy consumption continuous separation of Mg-H according to claim 12A method of making an O-cell electrolyte, characterized by: in the Mg-H2O cell devices containing Mg (OH)2The discharging of the electrolyte and the injection of the pure electrolyte are carried out continuously, the discharging amount is regulated and controlled through the opening of an electrolyte outlet valve, the injection amount is controlled through a rotor flow meter, the constant height of the electrolyte liquid level in the battery device is guaranteed, and the height is 15-20 mm higher than the polar plate all the time so as to maintain Mg-H2Equilibrium stability of O cells.
3. Low energy consumption continuous separation of Mg-H according to claim 12A method of making an O-cell electrolyte, characterized by: wherein the electrolyte outlet valve may be one of a butterfly valve, a ball valve, and a straight-through regulating valve.
4. Low energy consumption continuous Mg-H separation according to claim 32A method of making an O-cell electrolyte, characterized by: the electrolyte outlet valve is internally provided withThe preferable one step is a butterfly valve, and the opening of the butterfly valve is preferably 40-60%.
5. Low energy consumption continuous separation of Mg-H according to claim 12A method of making an O-cell electrolyte, characterized by: the membrane separation unit and the filter membrane are preferably polypropylene membranes, cellulose acetate membranes, polyether sulfone filter membranes, polytetrafluoroethylene membranes or ceramic membranes.
6. Low energy consumption continuous separation of Mg-H according to claim 12A method of making an O-cell electrolyte, characterized by: the pore diameter of the filtration membrane of the membrane separation unit is preferably 20nm to 5 μm.
7. Low energy consumption continuous Mg-H separation according to claim 62A method of making an O-cell electrolyte, characterized by: the pore diameter of the filtration membrane of the membrane separation unit is more preferably 200 nm.
8. Low energy consumption continuous separation of Mg-H according to claim 12A method of making an O-cell electrolyte, characterized by: the transmembrane pressure difference of the filtering membrane of the membrane separation unit is preferably 0.2-1 bar.
9. Low energy consumption continuous separation of Mg-H according to claim 12The method of O battery electrolyte can also be applied to Zn-H2O and Al-H2O is easy to generate a precipitate by-product, and the electrolyte is separated and recycled.
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| WO2016004802A1 (en) * | 2014-07-07 | 2016-01-14 | 四川大学 | Method and device for using co2 mineralization to produce sodium bicarbonate or sodium carbonate and output electric energy |
| CN113061918A (en) * | 2021-03-24 | 2021-07-02 | 东莞理工学院 | Hydrogen-electricity integrated device for continuous hydrogen production and application thereof |
| CN113346190A (en) * | 2020-02-18 | 2021-09-03 | 南京大学 | Porous material self-supporting membrane and preparation method and application thereof |
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| CN102456939A (en) * | 2011-01-06 | 2012-05-16 | 山东理工大学 | Improved large-capacity magnesium air battery |
| CN102041521A (en) * | 2011-01-10 | 2011-05-04 | 余建岳 | Device for power generation of magnesium or magnesium alloy and method thereof |
| WO2016004802A1 (en) * | 2014-07-07 | 2016-01-14 | 四川大学 | Method and device for using co2 mineralization to produce sodium bicarbonate or sodium carbonate and output electric energy |
| CN113346190A (en) * | 2020-02-18 | 2021-09-03 | 南京大学 | Porous material self-supporting membrane and preparation method and application thereof |
| CN113061918A (en) * | 2021-03-24 | 2021-07-02 | 东莞理工学院 | Hydrogen-electricity integrated device for continuous hydrogen production and application thereof |
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