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Alkaline aluminum-air battery electrolyte with fluorescent effect, and addition thereof

An electrolyte additive, empty battery technology, applied in the field of electrochemistry, can solve the problems of poor stability of aluminum ions, weak recognition of aluminum ions, unfavorable complexes, etc. Forming, easy to fall off effect

Pending Publication Date: 2019-03-15
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, aluminum ions are less stable in alkaline environments, which is not conducive to the formation of complexes.
Therefore, the quinoline compound in the alkaline electrolyte has a weaker recognition effect on aluminum ions.

Method used

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  • Alkaline aluminum-air battery electrolyte with fluorescent effect, and addition thereof
  • Alkaline aluminum-air battery electrolyte with fluorescent effect, and addition thereof
  • Alkaline aluminum-air battery electrolyte with fluorescent effect, and addition thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The chemical formula of 8-hydroxyquinoline in the examples is 8-HQ, where mM represents millimoles and M represents mol.

[0052] In the aluminum-air battery electrolyte compound additive in this embodiment, the electrolyte is a 4 mol / L sodium hydroxide solution, and the additive is 8-HQ with a concentration of 2.5-10 mM / L. The preparation method of the electrolyte is: preparing a sodium hydroxide solution with a concentration of 4M / L, cooling to room temperature, adding 8-HQ, and ultrasonic stirring for dissolution.

[0053] The gas collection method was used to test the hydrogen evolution self-corrosion rate of AA5052 aluminum alloy in the electrolyte prepared in this embodiment. The test time was 30 minutes. The results are shown in Table 1. The performance of A5052 aluminum alloy anode in 4mol / L sodium hydroxide solution containing different additives The polarization curve fitting data are shown in Table 2.

[0054] Table 1 Hydrogen evolution corrosion of AA5052 aluminum...

Embodiment 2

[0064] In the aluminum-air battery electrolyte compound additive in this embodiment, the electrolyte is a 4 mol / L sodium hydroxide solution, and the additive is ZnO with a concentration of 1.0-8.0 mmol / L. The preparation method of the electrolyte is: preparing a sodium hydroxide solution with a concentration of 4 mol / L, cooling to room temperature, adding ZnO, and stirring to dissolve.

[0065] The gas collection method was used to test the hydrogen evolution self-corrosion rate of the AA5052 aluminum alloy in the electrolyte prepared in this embodiment, and the test time was 30 minutes. The results are shown in Table 1. The polarization curve and AC impedance of AA5052 aluminum alloy in the above electrolyte are tested by electrochemical test, and the results are shown in Figure 1b with Figure 2b , The temperature is controlled at 25°C.

[0066] From Table 1, Table 2, Figure 1b with Figure 2b It can be seen that after adding ZnO, the corrosion potential shifts negatively, the ...

Embodiment 3

[0068] The aluminum-air battery electrolyte compound additive in this embodiment, wherein the electrolyte is a 4mol / L sodium hydroxide solution, the additive adopts 8-HQ with a solubility of 2.5-10 mmol / L, and the compound has a solubility of ZnO It is 4.0mmol / L. The preparation method of the electrolyte is as follows: prepare a sodium hydroxide solution with a concentration of 4mol / L, cool to room temperature, add 8-HQ with different concentrations, and after ultrasonically dissolve completely, add ZnO to make the concentration 4.0mmol / L, stir to dissolve .

[0069] The gas collection method was used to test the hydrogen evolution self-corrosion rate of the AA5052 aluminum alloy in the electrolyte prepared in this embodiment, and the test time was 30 minutes. The results are shown in Table 1. The polarization curve and AC impedance of AA5052 aluminum alloy in the above electrolyte are tested by electrochemical test, and the results are shown in Figure 1c with Figure 2c , The ...

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Abstract

The invention relates to an additive of an alkaline aluminum-air battery electrolyte with a fluorescent effect. The additive of the electrolyte comprises the following components: 8-hydroxyquinoline and zinc oxide. A molar ratio of the 8-hydroxyquinoline to the zinc oxide is 2.5-10.0 : 1.0-8.0. Compared with the prior art, the additive disclosed by the invention has the advantages that the hydrogen evolution self-corrosion of the positive electrode of the aluminum-air battery is effectively suppressed; the discharge capacity and the positive electrode utilization rate of the aluminum-air battery are improved; a basis is provided for real-time corrosion monitoring of the aluminum-air battery; and the additive has an important significance for commercial application of the aluminum-air battery.

Description

Technical field [0001] The invention relates to the field of electrochemistry, in particular to an alkaline aluminum-air battery electrolyte additive with fluorescent effect. Background technique [0002] The aluminum-air battery is a semi-fuel cell that uses oxygen in the air as the positive electrode active material and aluminum as the negative electrode active material. The oxygen in the air reaches the electrochemical reaction interface of the electrode through gas diffusion, and reacts with Al to release electrical energy. Aluminum-air batteries have the advantages of high energy density, light weight, rich material sources, no pollution, high reliability, long life, safe use, etc., so their development and application have received extensive attention. According to the nature of the electrolyte, aluminum-air batteries are generally divided into neutral aluminum-air batteries and alkaline aluminum-air batteries. Among the neutral electrolytes, aluminum-air batteries are ver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/50H01M12/06
CPCH01M6/505H01M6/5072H01M12/06H01M2300/0002
Inventor 张大全朱冲高立新李士成
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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