CN116799133A - Preparation method of active metal reversible electrode - Google Patents
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- CN116799133A CN116799133A CN202310818276.XA CN202310818276A CN116799133A CN 116799133 A CN116799133 A CN 116799133A CN 202310818276 A CN202310818276 A CN 202310818276A CN 116799133 A CN116799133 A CN 116799133A
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- 230000002441 reversible effect Effects 0.000 title claims abstract description 51
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 47
- 239000002184 metal Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 74
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 74
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N dimethyl sulfoxide Natural products CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 19
- 239000001257 hydrogen Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 19
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 17
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 15
- 238000007086 side reaction Methods 0.000 claims abstract description 14
- 239000000654 additive Substances 0.000 claims abstract description 11
- 230000000996 additive effect Effects 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 239000003960 organic solvent Substances 0.000 claims abstract description 5
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 3
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical group Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 22
- 239000000243 solution Substances 0.000 claims description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 12
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 claims description 8
- 239000008151 electrolyte solution Substances 0.000 claims description 8
- 238000005498 polishing Methods 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 6
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229940075397 calomel Drugs 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 3
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 229940113115 polyethylene glycol 200 Drugs 0.000 claims description 2
- 229940068918 polyethylene glycol 400 Drugs 0.000 claims description 2
- 230000010287 polarization Effects 0.000 abstract description 11
- 150000002739 metals Chemical class 0.000 abstract description 6
- 239000002904 solvent Substances 0.000 abstract description 5
- 230000002427 irreversible effect Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 10
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 7
- 229940021013 electrolyte solution Drugs 0.000 description 6
- 239000012046 mixed solvent Substances 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229920000604 Polyethylene Glycol 200 Polymers 0.000 description 3
- 229920002565 Polyethylene Glycol 400 Polymers 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- ZELCNSAUMHNSSU-UHFFFAOYSA-N 3,5-diamino-2-[(4-sulfamoylphenyl)diazenyl]benzoic acid Chemical class OC(=O)C1=CC(N)=CC(N)=C1N=NC1=CC=C(S(N)(=O)=O)C=C1 ZELCNSAUMHNSSU-UHFFFAOYSA-N 0.000 description 1
- 238000005267 amalgamation Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- JLFNLZLINWHATN-UHFFFAOYSA-N pentaethylene glycol Chemical compound OCCOCCOCCOCCOCCO JLFNLZLINWHATN-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- 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
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The application relates to a preparation method of an active metal reversible electrode, in the preparation process of the reversible electrode, a green organic solvent is used as an additive to reduce the reaction of the active metal and active hydrogen in water and improve the overpotential of hydrogen, thereby reducing the side reaction of the active metal electrode; wherein the active metal is aluminum, and the additive is dimethyl sulfoxide or polyethylene glycol. According to the application, through the addition of two green solvents, namely DMSO or PEG, the reaction of active metal and active hydrogen in water can be effectively reduced, the hydrogen overpotential is improved, and the problem of irreversible electrode caused by polarization of an aluminum electrode and the like is solved through a method for improving the hydrogen overpotential; the reversible battery prepared by the application has stable electromotive force, the surface of the aluminum electrode is bright and silvery white, and the application can safely, conveniently and effectively reduce side reactions generated by active metals and eliminate polarization phenomenon.
Description
Technical Field
The application belongs to the technical field of reversible electrode preparation, and particularly relates to a preparation method of an active metal reversible electrode for reducing side reaction of an active metal electrode by an additive.
Background
The measurement of the electromotive force of a reversible cell is an important method for obtaining corresponding thermodynamic functions Δg, Δh, Δs, ksp, kw, etc. by an electrochemical method, and is also an effective method for measuring the activity of ions in an electrolyte solution by using ion-selective electrodes. The key point of the method is to ensure that the battery keeps reversibility or the battery reaction is in an equilibrium state in the measurement process, so that two electrodes forming the battery are reversible electrodes, the electrode reaction is in the reversibility state in the measurement process, and the electrode cannot generate polarization phenomenon. Most of electrolyte solutions in the existing reversible battery system are aqueous solution systems, and the electrolyte solution system has good conductivity, but the problems of polarization reactions such as side reactions and the like generated by active metals (such as aluminum and the like) need to be overcome for electrodes of the active metals, for example, the metal aluminum is relatively active, and the standard reversible electrode has the potential of-1.66V and can generate displacement reaction with solvent water to generate hydrogen; in addition, since the prepared metal contains other metal impurities, which is an important factor in forming a microcell on the surface of the electrode, the reversibility of the electrode is directly affected, and the factor in generating electrode polarization is a difficult problem to be overcome by the reversible battery.
At present, the research on the charge and discharge cycle times of an active metal zinc electrode in a secondary battery is relatively large, and most of the research is focused on how to inhibit dendrite formation and improve the cycle stability of the battery, but in a reversible electrode, in order to solve the problem of side reaction of the zinc electrode, the current general solution is to reduce the side reaction on the zinc electrode by adopting a method of amalgamating a zinc rod. If zinc rod is immersed in saturated mercurous nitrate solution to complete zinc amalgamation, the overpotential of hydrogen precipitation on mercury is higher, so that the aim of avoiding side reaction between zinc electrode and protons in water is fulfilled. However, the method involves the problems of high mercury toxicity, high operation requirement, troublesome electrode preservation and post-treatment, and the like, and has great application influence. Therefore, how to find a safe, convenient and effective method for reducing side reactions of active metals and eliminating polarization phenomena to obtain an active metal reversible electrode is a difficult problem to be solved by the application.
For the electrode polarization problems such as side reaction of metal aluminum in the reversible electrode, no effective solution exists at present. The applicant of the present application found in the study that the side reaction of the active metal with water can be reduced by means of a suitable electrolyte solution additive, and at the same time the reaction of the active metal with hydrogen can be overcome by changing the overpotential of hydrogen on the active metal by changing the composition of the aqueous solvent. Dimethyl sulfoxide (DMSO) and polyethylene glycol (PEG) are green organic solvents with good solubility for inorganic salts, and have important effects on reducing the reaction of active metals and active hydrogen in water and changing the overpotential of hydrogen on an aluminum electrode, so that the application aims to dissolve the inorganic salts and active metal aluminum sheets of aluminum to form the aluminum electrode by using DMSO or PEG and water as mixed solvents, and the metal aluminum reversible electrode is obtained by a method for eliminating the polarization of the aluminum electrode by reducing the activity of protons in the solvent and changing the overpotential of hydrogen.
Disclosure of Invention
The application provides a preparation method of an active metal reversible electrode, which reduces side reaction of the active metal reversible electrode through an additive of a green organic solvent.
A preparation method of an active metal reversible electrode is characterized by comprising the following steps: in the preparation process of the reversible electrode, the green organic solvent is used as an additive to reduce the reaction of active metal and active hydrogen in water and improve the overpotential of hydrogen, thereby reducing the side reaction of the active metal electrode; wherein the active metal is aluminum, and the additive is dimethyl sulfoxide or polyethylene glycol.
Preferably, the preparation method of the active metal reversible electrode comprises the following steps:
(1) Pretreating an aluminum electrode slice to remove surface impurities;
(2) Adding dimethyl sulfoxide or polyethylene glycol into water;
(3) Dissolving inorganic salt by using the mixed solution in the step (2) to prepare electrolyte solution;
(4) Taking the electrolyte solution and an aluminum electrode plate to assemble an aluminum electrode in an electrode pool;
(5) And the aluminum electrode is used as a negative electrode to be assembled with other reversible electrodes to form a reversible battery, and the performance of the reversible battery is tested.
Preferably, the inorganic salt is aluminum chloride or aluminum sulfate.
Preferably, the volume ratio of the dimethyl sulfoxide to the water is 1:9 or 2:8 or 3:7 or 4:6. i.e. V DMSO ：V Water and its preparation method =1: 9 or 2:8 or 3:7 or 4:6.
preferably, the volume ratio of the polyethylene glycol to the water serving as the additive is 1:9 or 2:8 or 3:7 or 4:6. i.e. V PEG ：V Water and its preparation method =1: 9 or 2:8 or 3:7 or 4:6.
preferably, the polyethylene glycol is polyethylene glycol 200 (PEG 200) or polyethylene glycol 400 (PEG 400).
Preferably, the preparation method of the active metal reversible electrode comprises the following steps:
(1) Polishing the aluminum electrode plate by using sand skin and treating the aluminum electrode plate by using dilute sulfuric acid respectively to make the aluminum electrode plate bright;
(2) V taking PEG ：V Water and its preparation method =3: 7 or V DMSO ：V Water and its preparation method =3: 7, 100ml of a mixed solution;
(3) Adding x mol of aluminum sulfate or aluminum chloride into the mixed solution to obtain a corresponding y mol/L aluminum sulfate or aluminum chloride solution;
(4) Taking the aluminum sulfate or aluminum chloride solution and an aluminum electrode plate to assemble an aluminum electrode in an electrode pool;
(5) Assembling the aluminum electrode and other reversible electrodes Z into a reversible battery; the electromotive force was measured by a potentiometer, and the stability and the surface state of the aluminum electrode were observed.
Preferably, x=0.001 to 0.02 and y=0.01 to 0.2.
Preferably, the reversible electrode Z is one of a copper electrode, a saturated calomel electrode and a 0.1mol/L calomel electrode which takes 0.1mol/L copper sulfate as electrolyte.
The application has the technical effects that:
according to the application, through the addition of two green solvents, namely DMSO or PEG, the reaction of active metal and active hydrogen in water can be effectively reduced, the hydrogen overpotential is improved, and the problem of irreversible electrode caused by polarization of an aluminum electrode and the like is solved through a method for improving the hydrogen overpotential; the reversible battery prepared by the application has stable electromotive force, the surface of the aluminum electrode is bright and silvery white, and the application can safely, conveniently and effectively reduce side reactions generated by active metals and eliminate polarization phenomenon.
Detailed Description
The technical scheme of the present application is further specifically described by the following examples, which are given by way of illustration and not limitation. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The experimental methods described in the examples, unless otherwise specified, are all conventional; the reagents and materials, unless otherwise specified, are commercially available.
Example 1
Polishing the aluminum electrode plate by using sand skin and treating the aluminum electrode plate by using dilute sulfuric acid respectively to make the aluminum electrode plate bright; take another V PEG400 ：V Water and its preparation method =3: 7, adding 3.42 g of aluminum sulfate into 100ml of mixed solvent to dissolve, thereby obtaining 0.1M aluminum sulfate solution; taking the solution and an aluminum electrode slice to assemble an aluminum electrode in an electrode pool; assembling the electrode with a copper electrode using 0.1M copper sulfate as electrolyte to form a reversible battery; the electromotive force was measured by a potentiometer, and the stability and the surface state of the aluminum electrode were observed.
The measured electromotive force is 2.03822V, the electromotive force is basically unchanged after continuous measurement for 30 minutes, the measured value is changed within the range of 0.0001V, the surface of the aluminum electrode is bright and silvery white, and the surface state is basically unchanged.
Example 2
Polishing the aluminum electrode plate by using sand skin and treating the aluminum electrode plate by using dilute sulfuric acid respectively to make the aluminum electrode plate bright; take another V DMSO ：V Water and its preparation method =3: 7, adding 1.333 g of aluminum trichloride into 100ml of mixed solvent to dissolve, thereby obtaining 0.1M aluminum trichloride solution; taking the solution and an aluminum electrode slice to assemble an aluminum electrode in an electrode pool; assembling the electrode and a saturated calomel electrode into a reversible battery; the electromotive force was measured by a potentiometer, and the stability and the surface state of the aluminum electrode were observed.
The measured electromotive force is 1.92722V, the electromotive force is basically unchanged after continuous measurement for 30 minutes, the measured value is changed within the range of 0.0001V, the surface of the aluminum electrode is bright and silvery white, and the surface state is basically unchanged.
Example 3
Polishing the aluminum electrode plate by using sand skin and treating the aluminum electrode plate by using dilute sulfuric acid respectively to make the aluminum electrode plate bright; take another V PEG200 ：V Water and its preparation method =4: 6, adding 1.333 g of aluminum trichloride into 100ml of mixed solvent to dissolve, thereby obtaining 0.1M aluminum trichloride solution; taking the solution and an aluminum electrode slice to assemble an aluminum electrode in an electrode pool; assembling the electrode with a 0.1M calomel electrode into a reversible cell; the electromotive force was measured by a potentiometer, and the stability and the surface state of the aluminum electrode were observed.
The measured electromotive force is 2.01972V, the electromotive force is basically unchanged after continuous measurement for 40 minutes, the measured value is changed within the range of 0.0001V, the surface of the aluminum electrode is bright and silvery white, and the surface state is basically unchanged.
Example 4
Polishing the aluminum electrode plate by using sand skin and treating the aluminum electrode plate by using dilute sulfuric acid respectively to make the aluminum electrode plate bright; take another V PEG200 ：V Water and its preparation method =1: 9, adding 0.342 g of aluminum sulfate into 100ml of mixed solvent to dissolve, thus obtaining 0.01M aluminum sulfate solution; taking the solution and an aluminum electrode slice to assemble an aluminum electrode in an electrode pool; assembling the electrode and a saturated calomel electrode into a reversible battery; the electromotive force was measured by a potentiometer, and the stability and the surface state of the aluminum electrode were observed.
The measured electromotive force is 1.94652V, the electromotive force is basically unchanged after continuous measurement for 40 minutes, the measured value is changed within the range of 0.0001V, the surface of the aluminum electrode is bright and silvery white, and the surface state is basically unchanged.
Example 5
Polishing the aluminum electrode plate by using sand skin and treating the aluminum electrode plate by using dilute sulfuric acid respectively to make the aluminum electrode plate bright; 100ml of water solvent is taken, 1.333 g of aluminum trichloride is added for dissolution, and 0.1M of aluminum trichloride solution is obtained; taking the solution and an aluminum electrode slice to assemble an aluminum electrode in an electrode pool; assembling the electrode and a saturated calomel electrode into a reversible battery; the electromotive force was measured by a potentiometer, and the stability and the surface state of the aluminum electrode were observed.
The measurement result showed that the electromotive force was unstable, the electromotive force was changed from 1.91632V at the beginning, the measurement was continued for 5 minutes, the electromotive force was changed to 1.91013V, and the measurement value was changed by 0.0061V, which means that the electrode was subjected to irreversible polarization reaction, and that the aluminum electrode had bubbles on the surface, and was black and matt, which was the result of irreversible change of the aluminum electrode.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (9)
1. A preparation method of an active metal reversible electrode is characterized by comprising the following steps: in the preparation process of the reversible electrode, the green organic solvent is used as an additive to reduce the reaction of active metal and active hydrogen in water and improve the overpotential of hydrogen, thereby reducing the side reaction of the active metal electrode; wherein the active metal is aluminum, and the additive is dimethyl sulfoxide or polyethylene glycol.
2. The method for preparing an active metal reversible electrode according to claim 1, characterized by comprising the steps of:
(1) Pretreating an aluminum electrode slice to remove surface impurities;
(2) Adding dimethyl sulfoxide or polyethylene glycol into water;
(3) Dissolving inorganic salt by using the mixed solution in the step (2) to prepare electrolyte solution;
(4) Taking the electrolyte solution and an aluminum electrode plate to assemble an aluminum electrode in an electrode pool;
(5) And the aluminum electrode is used as a negative electrode to be assembled with other reversible electrodes to form a reversible battery, and the performance of the reversible battery is tested.
3. The method for preparing an active metal reversible electrode according to claim 2, characterized in that: the inorganic salt is aluminum chloride or aluminum sulfate.
4. The method for preparing an active metal reversible electrode according to claim 2, characterized in that: the volume ratio of the dimethyl sulfoxide to the water is 1:9 or 2:8 or 3:7 or 4:6.
5. the method for preparing an active metal reversible electrode according to claim 2, characterized in that: the volume ratio of the additive polyethylene glycol to the water is 1:9 or 2:8 or 3:7 or 4:6.
6. the method for preparing an active metal reversible electrode according to claim 2, characterized in that: the polyethylene glycol is polyethylene glycol 200 or polyethylene glycol 400.
7. The method for preparing an active metal reversible electrode according to claim 2, characterized by comprising the steps of:
(1) Polishing the aluminum electrode plate by using sand skin and treating the aluminum electrode plate by using dilute sulfuric acid respectively to make the aluminum electrode plate bright;
(2) V taking PEG ：V Water and its preparation method =3: 7 or V DMSO ：V Water and its preparation method =3: 7, 100ml of a mixed solution;
(3) Adding x mol of aluminum sulfate or aluminum chloride into the mixed solution to obtain a corresponding y mol/L aluminum sulfate or aluminum chloride solution;
(4) Taking the aluminum sulfate or aluminum chloride solution and an aluminum electrode plate to assemble an aluminum electrode in an electrode pool;
(5) Assembling the aluminum electrode and other reversible electrodes Z into a reversible battery; the electromotive force was measured by a potentiometer, and the stability and the surface state of the aluminum electrode were observed.
8. The method for preparing an active metal reversible electrode according to claim 7, wherein: x=0.001 to 0.02, and y=0.01 to 0.2.
9. The method for preparing an active metal reversible electrode according to claim 7, wherein: the reversible electrode Z is one of a copper electrode, a saturated calomel electrode and a 0.1mol/L calomel electrode of electrolyte, wherein the copper sulfate with the mol/L of the reversible electrode Z is 0.1 mol/L.
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