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Preparation method of immersed aluminum-air battery with negative electrode recovery device

A recovery device and air battery technology, which is applied to the electrodes of primary batteries, battery electrodes, fuel cell half-cells and primary battery half-cells, etc., which can solve the problem of reducing the utilization rate of aluminum electrodes, battery specific capacity, and oxygen reduction reaction. Unable to further progress, restricting the development of aluminum-air batteries and other issues, to achieve the effect of inhibiting hydrogen evolution corrosion, easy industrial application, and ensuring continuous discharge

Inactive Publication Date: 2021-11-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Aluminum has a strong reducibility, and it is easy to combine with water molecules in the electrolyte, and hydrogen gas is precipitated to accelerate self-corrosion, which greatly reduces the utilization rate of aluminum electrodes and the specific capacity of the battery;
[0006] (2) As the discharge time of the battery continues to accumulate, the side of the air positive electrode is easily flooded, and then absorbs carbon dioxide in the air to form carbonate, causing the pores on the side of the current collector to be blocked, and the oxygen in the air can no longer enter In the electrolyte, the oxygen reduction reaction cannot proceed further, and the discharge performance is greatly affected
To restore the discharge function, the air electrode must be replaced or the clogged pores must be cleaned, which increases the cost a lot
[0007] The above problems have greatly restricted the further development of aluminum-air batteries.

Method used

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  • Preparation method of immersed aluminum-air battery with negative electrode recovery device
  • Preparation method of immersed aluminum-air battery with negative electrode recovery device
  • Preparation method of immersed aluminum-air battery with negative electrode recovery device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This implementation involves the production of a battery with a negative electrode recovery device with a pure aluminum negative electrode-4mol / L sodium hydroxide & 0.3mol / L zinc oxide electrolyte-new air positive electrode.

[0038] Prepare a solution with a concentration of sodium hydroxide of 4 mol / L and a concentration of zinc oxide of 0.3 mol / L as electrolyte 5; mash 50 mg of manganese dioxide, 88 mg of cobalt nitrate and 40 mg of carbon nanotubes and add a mixture of 45 mL of perfluorosulfur In the mixed solution of acid type polymer solution, 600mL isopropanol and 350mL deionized water, the black slurry was obtained by ultrasonic dispersion; the obtained black slurry was evenly added dropwise to ultrasonic cleaning with acetone, ethanol and deionized water respectively. After 30 minutes on the dust-free carbon paper, after drying at 70°C for 5 hours, the positive catalyst 3 was obtained; the obtained catalyst 3 was placed on the surface of the foamed nickel 4, and...

Embodiment 2

[0040] This implementation involves the production of a pure aluminum negative electrode-6mol / L potassium hydroxide & 0.5mol / L zinc oxide electrolyte-new air positive electrode with a negative electrode recovery device.

[0041] Prepare a solution with a concentration of potassium hydroxide of 6 mol / L and a concentration of zinc oxide of 0.5 mol / L as electrolyte 5; mash 55 mg of manganese dioxide, 82 mg of cobalt nitrate and 45 mg of carbon nanotubes and add 50 mL of perfluorosulfur In the mixed solution of acid type polymer solution, 620mL isopropanol and 370mL deionized water, a black slurry was obtained by ultrasonic dispersion; the obtained black slurry was evenly added dropwise to ultrasonic cleaning with acetone, ethanol and deionized water respectively. After 30 minutes on the dust-free carbon paper, after drying at 65°C for 5 hours, the positive catalyst 3 was obtained; the obtained catalyst 3 was placed on the surface of the nickel foam 4, and pressed with a roller pre...

Embodiment 3

[0043] This implementation involves the production of a battery with a negative electrode recovery device with a pure aluminum negative electrode-6mol / L potassium hydroxide & 0.5mol / L zinc oxide electrolyte-water-flooded faulty positive electrode.

[0044] Prepare a solution with a concentration of potassium hydroxide of 6 mol / L and a concentration of zinc oxide of 0.5 mol / L as the electrolyte 5; use a 1.2 mm thick air electrode that has been flooded and has a salt-emission failure as the positive electrode; use a pore size of 1.5× The 1.5mm wire mesh is processed into a hollow column as the negative electrode recovery device 2; pure aluminum with a purity of 99.6% is selected as the negative electrode 1; the resulting electrolyte 5, positive electrode, negative electrode recovery device 2, and negative electrode 1 are assembled into a semi-open cube type aluminum-air battery, conduct 20mA / cm2 The discharge test under constant current density worked stably for 5.3 hours.

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Abstract

The invention discloses a preparation method of an immersed aluminum-air battery with a negative electrode recovery device. The method comprises the following steps of adding a strong alkaline electrolyte and a zinc-containing compound into deionized water to prepare an alkaline electrolyte with the hydroxyl concentration of 2-6 mol / L and the zinc ion concentration of 0-0.5 mol / L; mashing manganese dioxide, cobalt nitrate and carbon nanotube solids, adding into a mixed solution of a perfluorosulfonic acid polymer solution, isopropanol and deionized water, performing ultrasonic dispersion to obtain black paste, dropwise adding the black paste onto a pretreated dust-free carbon paper, drying, putting on the surface of foamed nickel, and pressing by using a roller press to obtain an air positive electrode; making a stainless steel wire mesh into a hollow cylindrical body as a negative electrode recovery device; using a pure aluminum or aluminum alloy as a negative electrode material; and assembling the obtained electrolyte, the positive electrode, the negative electrode recovery device and the negative electrode into a cubic partially-open type aluminum-air battery. According to the present invention, the preparation is simple and convenient, the production cost is low, and the utilization rate of the negative electrode and the specific capacity of the battery can be improved.

Description

technical field [0001] The invention relates to a preparation method of a submerged aluminum-air battery with a negative electrode recovery device, belonging to the field of metal-air battery power generation. Background technique [0002] As a special secondary energy source, electric energy dominates the development of society and the progress of science and technology. At present, 73% of my country's electricity comes from thermal power generation. However, with the decline of fossil energy, the contradiction between energy supply and demand is becoming more and more acute. Therefore, new energy power generation is regarded as a supplement to traditional methods. [0003] Metal-air batteries have a simple structure, stable operation and no explosion hazard, and have bright prospects in the field of commercial batteries. Commonly used metal anodes include aluminum, zinc, and magnesium. Among them, the aluminum-air battery has mass energy density (8100Wh / kg) and volumetr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/12H01M4/46H01M4/62H01M4/88H01M12/06B09B3/00B09B5/00
CPCH01M12/06H01M4/12H01M4/463H01M4/628H01M4/8864B09B3/00B09B5/00
Inventor 魏满晖王克亮左亚宇刘健张鹏飞
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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