Method for preparing anode of aluminum-air battery by recovering aluminum

An aluminum-air battery and a technology for recycling aluminum, which is applied to battery electrodes, primary battery electrodes, fuel cell half-cells, and primary battery half-cells, etc., which can solve the difficulties in recycling waste aluminum materials and serious self-corrosion hydrogen evolution reactions , reduce the utilization rate of aluminum negative electrode and the output power of aluminum-air battery, and achieve the effect of improving the utilization rate of anode and battery power, reducing the rate of hydrogen evolution self-corrosion, and refining the alloy grain

Inactive Publication Date: 2019-05-28
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes a method for preparing aluminum-air battery anodes by recycling aluminum, aiming at the difficulty in recycling a large amount of waste aluminum materials existing in industrial society and daily life, such as waste cans, waste aluminum wires, waste Extruded profiles, aluminum plate scraps, machined aluminum scraps, waste aluminum alloy cylinders, e

Method used

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  • Method for preparing anode of aluminum-air battery by recovering aluminum
  • Method for preparing anode of aluminum-air battery by recovering aluminum

Examples

Experimental program
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Example Embodiment

[0034] Example 1

[0035] This embodiment specifically includes the following steps:

[0036] 1. Put the squashed and cleaned cans, aluminum scraps, and machined aluminum scraps directly into the cold processing crusher feed bin, and crush them into powder, with an average particle size of 1-3mm, and the particle shape is spherical, hemispherical and prismatic; For scrap aluminum wire and waste extruded profiles, first cut them into line segments, according to the requirements of the finished powder, cut off the length of 4 to 6 mm, and the uniform specifications of the line segment wool are processed by the cold processing crusher, and the average powder particle size is 1-3 mm , The shape of the particles is spherical, hemispherical and prismatic.

[0037] 2. Mix the waste aluminum powder, the foaming agent and the additional elements Mg and Sn in the following proportions, and then perform pressure molding: the foaming agent content is 1.0%, the specific content of Mg is 1%, the ...

Example Embodiment

[0039] Example 2

[0040] This embodiment specifically includes the following steps:

[0041] 1. Melt waste aluminum materials such as cans, aluminum wires, waste extruded profiles, aluminum plate scraps, machined aluminum scraps, and waste aluminum alloy cylinders into molten aluminum at a melting temperature of 720℃;

[0042] 2. By adding a thickener and stirring to thicken the melt, the selected thickener is industrial metal Ca with a mass fraction of 2.5%;

[0043] 3. Add foaming agent, add TiH2 with mass fraction of 1.2% and stir for 8min, temperature is 680℃;

[0044] 4. Thermal insulation foaming, take out the stirrer, and place the melt at 600°C for 12 minutes to complete the foaming process;

[0045] 5. Cool, take out the crucible from the furnace and cool down naturally at room temperature.

[0046] The foamed aluminum alloy material prepared by the above method is further subjected to extrusion and cutting to obtain the aluminum alloy anode material; the prepared anode material...

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Abstract

The invention relates to a method for preparing an anode of an aluminum-air battery by recovering aluminum. According to the method, aluminum-containing waste materials are taken as raw materials, a melt foaming method or a powder metallurgy method is adopted, and a foam aluminum alloy material with the pore diameter of 1-30 mm, the porosity of 55-95%, the Mg content of 1%-2% and the Sn content of0.6%-1.0% is prepared; and the foam aluminum alloy material is further prepared by extrusion and cutting, and the anode of the aluminum-air battery is obtained. By the adoption of the method, the technical problems of difficult recovery of a large number of waste aluminum materials in industrial society and daily life, a serious self-corrosion hydrogen evolution reaction of a metal electrode of the aluminum-air battery in an alkaline working environment and serious reduction of the utilization rate of an aluminum negative pole and the output power of the aluminum-air battery especially underthe condition of the large current are solved.

Description

technical field [0001] The invention relates to a technology in the field of aluminum-air batteries, in particular to a method for preparing aluminum-air battery anodes by recycling aluminum. Background technique [0002] Aluminum-air battery is a new type of high specific energy battery, which has the characteristics of long service life, strong adaptability, cheap and easy-to-obtain anode raw material aluminum, non-toxic and environmentally friendly, easy to recycle and regenerate, and can be used in electric vehicle power supply, submarine AIP system energy, underwater The fields of robot power supply and high-energy energy storage power supply have good application prospects. Existing aluminum-air batteries have serious self-corrosion of aluminum anode materials, serious battery heating, low anode utilization, and it is difficult to achieve high discharge voltage and battery power, which does not meet the requirements of high-power power supply. The power density of a m...

Claims

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Application Information

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IPC IPC(8): C22C21/06C22C1/03C22C1/08B22F3/11B22F3/20C22C21/00H01M4/12H01M4/36H01M4/46H01M4/62H01M12/06
Inventor 任建明付超鹏张佼孙宝德
Owner SHANGHAI JIAO TONG UNIV
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