CN115395144A - Alkaline electrolyte for aluminum-air battery and preparation method and application thereof - Google Patents

Alkaline electrolyte for aluminum-air battery and preparation method and application thereof Download PDF

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CN115395144A
CN115395144A CN202211199464.0A CN202211199464A CN115395144A CN 115395144 A CN115395144 A CN 115395144A CN 202211199464 A CN202211199464 A CN 202211199464A CN 115395144 A CN115395144 A CN 115395144A
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aluminum
alkaline electrolyte
inorganic additive
air battery
organic solvent
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田忠良
朱渊
华志凡
汪滔
程皓
李怡凡
王子源
赖延清
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Central South University
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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
    • H01M12/00—Hybrid cells; Manufacture thereof
    • H01M12/04—Hybrid cells; Manufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type
    • H01M12/06—Hybrid cells; Manufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type with one metallic and one gaseous electrode
    • 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
    • H01M2300/0014—Alkaline electrolytes
    • 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
    • H01M2300/0088—Composites
    • H01M2300/0091—Composites in the form of mixtures
    • 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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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Hybrid Cells (AREA)

Abstract

The invention discloses an alkaline electrolyte for an aluminum-air battery, a preparation method and application thereof, wherein the electrolyte consists of a strong alkaline solution, an organic solvent and an inorganic additive; wherein, the organic solvent consists of ethers and amides solvent with the volume ratio of (35-90)% to (65-10)%, the inorganic additive consists of metal salt and metal oxide with the molar ratio of (1-3): 1-2), the volume ratio of the organic solvent to the strong alkaline solution is (5-45): 95-55, and the concentration of the inorganic additive in the alkaline electrolyte for the aluminum air battery is 0.005-0.3 mol/L. According to the invention, through the synergistic effect of the solvation of the organic solvent and the interface regulation and the strengthening effect of the inorganic additive on the interface film, the activity of free water is inhibited, the hydrogen evolution corrosion of aluminum is effectively inhibited, the polarization of an electrode is reduced, the stability of the electrolyte is improved, and the electrochemical performance of the aluminum-air battery is obviously improved.

Description

Alkaline electrolyte for aluminum-air battery and preparation method and application thereof
Technical Field
The invention belongs to the technical field of new energy batteries, and particularly relates to an alkaline electrolyte for an aluminum-air battery, and a preparation method and application thereof.
Background
With the continuous development of economy, environmental problems and energy problems become more serious, and how to find a new clean renewable energy source is a current research focus. The metal-air battery has wide application prospect due to the characteristics of environmental friendliness, safety and the like. Among them, the aluminum-air battery shows great advantages and potentials due to its rich aluminum resource reserves, high energy density, low price and good recyclability.
However, the aluminum-air battery has not been commercially used on a large scale so far. The main reason is that aluminum in the aluminum-air battery has a serious hydrogen evolution corrosion problem. Since aluminum is an amphoteric metal, which is chemically active, OH in alkaline electrolytes - And H 2 The existence of O causes the aluminum to be easy to generate hydrogen self-corrosion, thus leading to low utilization rate of the anode and reduction of the electrochemical performance of the battery.
The interface type corrosion inhibitor such as an inorganic additive, an organic additive, a composite additive and the like is added into the aluminum-air battery electrolyte, so that a layer of protective film can be adsorbed and deposited at an aluminum/electrolyte interface to prevent water molecules and corrosive media from contacting with aluminum, and inhibit hydrogen evolution corrosion of the aluminum. But such methods have limited inhibition efficiency. Patent CN202010181154.0 discloses a high-concentration saline-alkali electrolyte for aluminum-air battery, which can change the solvation structure of water molecules, reduce free water and reduce the activity of free water by adding high-concentration potassium salt. However, the method requires large amount of salt, which results in high viscosity and low conductivity of the electrolyte, and the aluminum surface is corroded by water and corrosive medium OH - There is still hydrogen evolution corrosion. Therefore, the finding of a novel electrolyte which can effectively improve the problem of hydrogen evolution corrosion of the aluminum cathode is of great significance.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an alkaline electrolyte for an aluminum air battery, and a preparation method and application thereof, and aims to solve the problem of hydrogen evolution corrosion of an aluminum cathode, improve the utilization rate of the aluminum cathode and improve the electrochemical performance of the battery by regulating and controlling the solvation structure and the interface structure of the electrolyte.
The purpose of the invention is realized by the following technical scheme:
the alkaline electrolyte for the aluminum air battery consists of strong alkaline solution, organic solvent and inorganic additive; the organic solvent is prepared from an ether solvent and an amide solvent according to the volume ratio of (35-90)%: (65-10)% of the total weight of the composition; the volume ratio of the organic solvent to the strong base solution is (5-45) to (95-55); the inorganic additive consists of metal salt and metal oxide in a molar ratio of (1-3) to (1-2), and the concentration of the inorganic additive in the alkaline electrolyte for the aluminum-air battery is 0.005-0.3 mol/L.
Preferably, among the organic solvents, the ether solvent is at least one of diethyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol methyl ethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, and polytetraethylene glycol dimethyl ether; the amide solvent is at least one of N-methylacetamide, N-methylformamide, N-dimethylacetamide, N-dimethylhydroxyacetamide, N-methoxy-N-methylacetamide and N-methoxy-N-methylformamide.
Preferably, in the inorganic additive, the metal salt is at least one of metal salts of zinc, tin, indium, bismuth, gallium and chromium; the metal oxide is at least one of oxides of zinc, tin, indium, bismuth, gallium and chromium.
Preferably, the metal salt is at least one of sulfate, sulfonate, oxalate, chloride, acetate and nitrate.
Further preferably, in the inorganic additive, the metal salt is any one of sodium stannate, zinc sulfate, indium sulfate and bismuth nitrate, and the metal oxide is any one of tin dioxide, zinc oxide and indium oxide.
In the invention, when the content of the organic solvent is too high, the polarization of the electrode is easily caused, and when the content is too low, the regulation and control effect on the solvation structure of the electrolyte and the side interface structure of the aluminum/electrolyte is limited. When the amount of the inorganic additive is too small, the hydrogen evolution inhibiting effect is limited, and when the amount is too large, the product film formed on the surface of aluminum is too thick and heavy, and the film is liable to fall off. Therefore, the concentrations of the organic solvent and the inorganic additive should be controlled within the selected ranges.
Preferably, the strong base is at least one of sodium hydroxide, potassium hydroxide, barium hydroxide, lithium hydroxide, rubidium hydroxide and cesium hydroxide.
Preferably, the concentration of the strong alkali solution is 2 to 8mol/L.
The preparation method of the alkaline electrolyte for the aluminum-air battery comprises the following steps:
1) Preparing a strong alkali solution;
2) Mixing the organic solvent and the strong alkali solution obtained in the step 1) according to a set volume ratio, and uniformly stirring to obtain a mixed solution;
3) Adding the inorganic additive with the formula amount into the mixed solution in the step 2), and stirring until the inorganic additive is dissolved to obtain the alkaline electrolyte for the aluminum air battery.
Preferably, in the steps 2) to 3), the stirring temperature is 20 to 60 ℃; the stirring mode is at least one of magnetic stirring, ultrasonic stirring and mechanical stirring; the stirring time is 30-90 min.
In the preparation method, the stirring time and temperature of each step are particularly critical, and in the solution preparation process, the temperature is increased to facilitate the full mixing of all components, but the temperature is too high to easily cause the volatilization of an organic solvent or moisture. In order to fully dissolve and mix the components, the stirring time should be as long as possible.
The alkaline electrolyte for the aluminum-air battery is applied to the aluminum-air battery.
The alkaline electrolyte for the aluminum air battery provided by the invention can effectively improve the hydrogen evolution corrosion of aluminum and improve the electrochemical performance of the battery, and has the following action mechanism:
(1) According to the invention, the ether/amide organic solvent is introduced into the alkaline electrolyte, so that the organic solvent preferentially forms hydrogen bonds with water molecules inside and outside a solvation sheath through lone pair electrons on a-C-O-C or-C = O functional groupThe action of the organic solvent and the water is stronger than that of the cation and the water, the content of free water is reduced, and the solvation effect of the cation and the coordinated water is weakened; at the same time, the organic solvent can pass through itself and H 2 H is bound by hydrogen bond network formed between O molecules 2 The hydrogen in O improves the thermodynamic stability of water, thereby reducing water activity. On the other hand, the organic solvent contains polar functional groups with strong electronegativity such as ether bonds or carbonyl groups, so that the polar functional groups can be adsorbed on the surface of aluminum in preference to water molecules, a new water-poor electric double layer is constructed at the aluminum/electrolyte interface, the adsorption of the water molecules on the aluminum negative electrode interface is reduced, active sites for hydrogen evolution corrosion are occupied, and the water molecules and a corrosion medium OH are blocked - Contact with aluminum. Therefore, the organic solvent can synergistically regulate and control the solvation structure and the aluminum/electrolyte interface structure of the electrolyte, and inhibit the hydrogen evolution corrosion of aluminum. (2) Inorganic additives such as tin salt, zinc salt, indium salt and oxide thereof with high hydrogen evolution overpotential can be reduced to form an inorganic film on the surface of the aluminum layer preferentially in the discharging process of the aluminum cathode, so that the coverage area of a protective film is increased, the defect of limited adsorption capacity of an organic solvent at an interface is overcome, the hydrogen evolution overpotential of aluminum can be improved, the hydrogen evolution corrosion is further inhibited, and the corrosion resistance of the aluminum is enhanced. (3) The organic solvent and the inorganic additive have a synergistic effect, polar functional groups with strong electronegativity in the organic solvent can be adsorbed on the surface of the aluminum and can also be adsorbed on the surface of an inorganic product membrane, the deposition of the inorganic membrane in a solution system can also be adjusted, and the problems that a single inorganic product membrane is loose, porous and easy to fall off on the surface of the aluminum are solved, so that the inorganic product is deposited on the surface of an aluminum anode more uniformly and firmly, the uniformity, compactness and stability of an interfacial membrane are enhanced, and the hydrogen evolution self-corrosion of the aluminum is further inhibited.
The invention has the beneficial effects that:
(1) The molecular structure of the organic solvent selected by the invention contains a large amount of hydrophilic groups, and the organic solvent can be mutually dissolved with water in any proportion, and still keeps lower viscosity and higher ionic conductivity when the content of the organic solvent is higher.
(2) The organic solvent selected in the invention binds H through hydrogen bond 2 Hydrogen in O, enhancementThe strength of O-H in water molecules is improved, the thermodynamic stability of water is improved, the activity of free water is inhibited, the electrochemical stability window of the electrolyte is widened, and the stability of the electrolyte is improved.
(3) The electrolyte inhibits the activity of free water, effectively inhibits the hydrogen evolution corrosion of aluminum, reduces the polarization of an electrode by the synergistic effect of the solvation of an organic solvent and the interface regulation and the strengthening effect of an inorganic additive on an interface film, has the corrosion inhibition efficiency of 95 percent, improves the working voltage by 100 to 300mV, and improves the specific discharge capacity by 800 to 1500mAh/g.
(4) The preparation method of the alkaline electrolyte provided by the invention is simple to operate, low in cost, wide in raw material source and good in application prospect.
Detailed Description
The following examples are intended to illustrate the invention in further detail; and the scope of the claims of the present invention is not limited by the examples.
In the following examples and comparative examples, the aluminum negative electrode was pure aluminum and the positive electrode was a commercial manganese dioxide catalytic electrode.
Example 1
Firstly, 70mL of 4mol/L sodium hydroxide solution is prepared, and the solution is added into a reactor with the volume ratio of 50%: 30mL of an organic solvent consisting of 50% of tetraethylene glycol dimethyl ether and N, N-dimethylacetamide, and the mixture is magnetically stirred for 50min at 40 ℃ until the mixture is fully mixed to obtain a mixed solution. Adding a solution prepared from the following components in a molar ratio of 2:1, the concentration of the inorganic additive in the electrolyte is 0.03mol/L, the mixture is magnetically stirred for 40min at 40 ℃ until the inorganic additive is fully dissolved to obtain the alkaline electrolyte for the aluminum air battery, and the alkaline electrolyte is applied to the aluminum air battery.
Example 2
Compared with example 1, the other conditions were not changed except that the volume of the sodium hydroxide solution was 55mL and the volume of the organic solvent was 45mL.
Example 3
Compared with example 1, the other conditions were not changed except that the volume of the sodium hydroxide solution was 80mL and the volume of the organic solvent was 20mL.
Example 4
Compared with example 1, the other conditions were not changed except that the volume of the sodium hydroxide solution was 95mL and the volume of the organic solvent was 5mL.
Example 5
Other conditions were not changed compared with example 1 except that the concentration of the inorganic additive in the electrolyte was 0.005mol/L.
Example 6
Compared with example 1, other conditions were not changed except that the concentration of the inorganic additive in the electrolyte was 0.3mol/L.
Example 7
Compared with example 1, the other conditions are not changed, except that the volume ratio of the ethers to the amides in the organic solvent is 35%:65 percent.
Example 8
Compared with example 1, the other conditions are not changed, except that the volume ratio of the ethers to the amides in the organic solvent is 90%:10 percent.
Example 9
Compared with example 1, other conditions are not changed, except that the molar ratio of the metal salt to the metal oxide in the inorganic additive is 1:2.
example 10
Compared with example 1, other conditions are not changed, except that the molar ratio of the metal salt to the metal oxide in the inorganic additive is 3:1.
example 11
Compared with example 1, other conditions are not changed, except that the concentration of the strong base in the strong base solution is 2mol/L.
Example 12
Compared with example 1, other conditions are unchanged, except that the concentration of the strong base in the strong base solution is 8mol/L.
Example 13
Firstly, 60mL of 5mol/L sodium hydroxide solution is prepared, and the mixture is added according to the volume ratio of 40%:60% of triethylene glycol dimethyl ether and N-methyl formamide, and stirring for 50min at 40 ℃ by magnetic force until the components are fully mixed to obtain a mixed solution. Adding a mixture of 2:1, the concentration of the inorganic additive in the electrolyte is 0.1mol/L, and the alkaline electrolyte for the aluminum air battery is obtained after the inorganic additive is magnetically stirred for 40min at the temperature of 40 ℃ until the inorganic additive is fully dissolved, and the alkaline electrolyte for the aluminum air battery is applied to the aluminum air battery.
Example 14
Firstly, 70mL of 6mol/L sodium hydroxide solution is prepared, and the solution is added into a reactor, wherein the volume ratio of the solution is 80%: 30mL of an organic solvent consisting of 20% diethyl ether and N, N-dimethylacetamide, and stirring the mixture for 50min by magnetic force at 40 ℃ until the mixture is fully mixed to obtain a mixed solution. Adding a mixture of the components with a molar ratio of 1:2, the concentration of the inorganic additive in the electrolyte is 0.08mol/L, and the alkaline electrolyte for the aluminum air battery is obtained after the inorganic additive is magnetically stirred for 40min at the temperature of 40 ℃ until the inorganic additive is fully dissolved, and the alkaline electrolyte for the aluminum air battery is applied to the aluminum air battery.
Example 15
Firstly, 70mL of 4mol/L sodium hydroxide solution is prepared, and the solution is added into a reaction kettle with the volume ratio of 50%: 30mL of an organic solvent consisting of 50% diethylene glycol dimethyl ether and N, N-dimethylacetamide, and stirring the mixture for 50min by magnetic force at 40 ℃ until the mixture is fully mixed to obtain a mixed solution. Adding a mixture of the components with a molar ratio of 1:1, the concentration of the inorganic additive in the electrolyte is 0.15mol/L, the mixture is magnetically stirred for 40min at 40 ℃ until the inorganic additive is fully dissolved to obtain the alkaline electrolyte for the aluminum air battery, and the alkaline electrolyte is applied to the aluminum air battery.
Example 16
Firstly, preparing 80mL of 4mol/L sodium hydroxide solution, and adding the sodium hydroxide solution with the volume ratio of 70%: 20mL of an organic solvent consisting of 30% of ethylene glycol monomethyl ether and N, N-dimethyl hydroxyl acetamide, and performing magnetic stirring for 50min at 40 ℃ until the components are fully mixed to obtain a mixed solution. Adding a mixture of 2:1, the concentration of the inorganic additive in the electrolyte is 0.2mol/L, the mixture is magnetically stirred for 40min at 40 ℃ until the mixture is fully dissolved to obtain the alkaline electrolyte for the aluminum-air battery, and the alkaline electrolyte is applied to the aluminum-air battery.
Example 17
Firstly, 60mL of 4mol/L sodium hydroxide solution is prepared, and the solution is added into a reactor, wherein the volume ratio is 70%: 40mL of an organic solvent consisting of 30% polytetraethylene glycol dimethyl ether and N-methoxy-N-methylacetamide was magnetically stirred at 40 ℃ for 50min until the mixture was sufficiently mixed to obtain a mixed solution. Adding a mixture of 2:1, the concentration of the inorganic additive in the electrolyte is 0.2mol/L, the mixture is magnetically stirred for 40min at 40 ℃ until the inorganic additive is fully dissolved to obtain the alkaline electrolyte for the aluminum air battery, and the alkaline electrolyte is applied to the aluminum air battery.
Example 18
Firstly, 70mL of 4mol/L sodium hydroxide solution is prepared, and the mixture is added according to the volume ratio of 40%: 30mL of an organic solvent consisting of 60% of polytetraethylene glycol dimethyl ether and N-methoxy-N-methylformamide is magnetically stirred for 50min at 40 ℃ until the components are fully mixed to obtain a mixed solution. Adding a mixture of a molar ratio of 3:2, the concentration of the inorganic additive in the electrolyte is 0.1mol/L, and the alkaline electrolyte for the aluminum air battery is obtained after the inorganic additive is magnetically stirred for 40min at the temperature of 40 ℃ until the inorganic additive is fully dissolved, and the alkaline electrolyte for the aluminum air battery is applied to the aluminum air battery.
Comparative example 1
The preparation method is similar to example 1, except that no organic solvent and no inorganic additive are added.
Comparative example 2
The preparation method is similar to example 1, except that no inorganic additive is added.
Comparative example 3
The preparation is analogous to example 1, except that no organic solvent is added.
The performance tests are shown in table 1. Table 1 shows the hydrogen evolution corrosion rates and the cell densities at 25mA cm for the examples of the invention and the comparative examples -2 Current density of 6h discharge.
TABLE 1 Hydrogen evolution corrosion rates and electrochemical performance of the cells for the inventive and comparative examples
Figure BDA0003871594880000071
Figure BDA0003871594880000081
As can be seen from the data in Table 1, when the alkaline electrolyte is used for the electrolyte of the aluminum-air battery, the hydrogen evolution corrosion rate is greatly reduced, and the discharge specific capacity is remarkably improved.
It can be seen from the analysis of examples and comparative examples 1 to 3 that the hydrogen evolution corrosion of examples is effectively inhibited by the introduction of organic solvents and inorganic additives, and particularly, the hydrogen evolution rate of example 1 is only 0.0312mL/cm 2 min, working voltage of 1.437V and specific discharge capacity of 2384.45mAh/g. In the comparative examples 1 to 3, because organic solvent and inorganic additive components are added or not added, the hydrogen evolution corrosion cannot be effectively inhibited, the hydrogen evolution corrosion rate is high, the working voltage is reduced, and the discharge specific capacity is reduced.
The above examples only represent several embodiments of the present invention, but should not be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An alkaline electrolyte for an aluminum air battery is composed of a strong alkaline solution, an organic solvent and an inorganic additive; the organic solvent is prepared from an ether solvent and an amide solvent according to the volume ratio of (35-90)%: (65-10)% of the total weight of the composition; the volume ratio of the organic solvent to the strong base solution is (5-45) to (95-55); the inorganic additive consists of metal salt and metal oxide in a molar ratio of (1-3) to (1-2), and the concentration of the inorganic additive in the alkaline electrolyte for the aluminum-air battery is 0.005-0.3 mol/L.
2. The alkaline electrolyte for aluminum-air batteries according to claim 1, wherein the ether solvent is at least one of diethyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol methyl ethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, and polytetraethylene glycol dimethyl ether; the amide solvent is at least one of N-methylacetamide, N-methylformamide, N-dimethylacetamide, N-dimethylhydroxyacetamide, N-methoxy-N-methylacetamide and N-methoxy-N-methylformamide.
3. The alkaline electrolyte for aluminum-air batteries according to claim 1, wherein in said inorganic additive, the metal salt is at least one of metal salts of zinc, tin, indium, bismuth, gallium, and chromium; the metal oxide is at least one of oxides of zinc, tin, indium, bismuth, gallium and chromium.
4. The alkaline electrolyte for aluminum-air batteries according to claim 3, wherein said metal salt is at least one of sulfate, sulfonate, oxalate, chloride, acetate, nitrate.
5. The alkaline electrolyte for aluminum-air batteries according to claim 3, wherein in said inorganic additive, the metal salt is any one of sodium stannate, zinc sulfate, indium sulfate and bismuth nitrate, and the metal oxide is any one of tin dioxide, zinc oxide and indium oxide.
6. The alkaline electrolyte for aluminum-air batteries according to claim 1, wherein said strong base is at least one of sodium hydroxide, potassium hydroxide, barium hydroxide, lithium hydroxide, rubidium hydroxide, and cesium hydroxide.
7. The alkaline electrolyte for aluminum-air batteries according to claim 6, wherein the concentration of said strongly alkaline solution is 2 to 8mol/L.
8. A method for preparing the alkaline electrolyte for aluminum-air batteries according to claim 1, comprising the steps of:
1) Configuring a strong base solution of the concentration of claim 7;
2) Mixing an organic solvent and the strong alkali solution obtained in the step 1) according to a set volume ratio, and uniformly stirring to obtain a mixed solution;
3) Adding the inorganic additive with the formula amount into the mixed solution in the step 2), and stirring until the inorganic additive is dissolved to obtain the alkaline electrolyte for the aluminum air battery.
9. The preparation method according to claim 8, wherein in the steps 2) to 3), the stirring temperature is 20 to 60 ℃; the stirring mode is at least one of magnetic stirring, ultrasonic stirring and mechanical stirring; the stirring time is 30-90 min.
10. Use of the alkaline electrolyte for an aluminum-air battery according to any one of claims 1 to 7 in an aluminum-air battery.
CN202211199464.0A 2022-09-29 2022-09-29 Alkaline electrolyte for aluminum-air battery and preparation method and application thereof Pending CN115395144A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116526026A (en) * 2022-12-30 2023-08-01 郑州佛光发电设备股份有限公司 Electrolyte for low-temperature metal fuel cell and fuel cell comprising same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116526026A (en) * 2022-12-30 2023-08-01 郑州佛光发电设备股份有限公司 Electrolyte for low-temperature metal fuel cell and fuel cell comprising same
CN116526026B (en) * 2022-12-30 2024-03-19 郑州佛光发电设备股份有限公司 Electrolyte for low-temperature metal fuel cell and fuel cell comprising same

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