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Aluminum-air battery anode and preparation method thereof

An aluminum-air battery and anode technology, which is applied to battery electrodes, fuel cell-type half-cells, primary battery-type half-cells, circuits, etc., can solve problems such as poor corrosion resistance, low self-discharge rate, and complicated preparation processes problems, to achieve the effect of eliminating harmful effects, low self-discharge rate, and simple preparation process

Active Publication Date: 2020-05-19
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to overcome the problems of complex preparation process and poor corrosion resistance of the aluminum-air battery anode in the prior art, and provides an aluminum-air battery anode and a preparation method thereof. The prepared battery anode alloy has good electrochemical performance, Low overpotential, low self-discharge rate, high hydrogen evolution overpotential, good corrosion resistance, simple synthesis process

Method used

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  • Aluminum-air battery anode and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0037] An aluminum-air battery anode, according to 100 mass points, contains components: 0.03% Ga, 0.45% Mn, 2.5% Mg, 0.3% Pb, and the remaining components are Al.

[0038] A method for preparing an aluminum-air battery anode. Aluminum alloy is smelted in a crucible, and the smelting and heating processes are all carried out in a crucible smelting furnace, including the following preparation steps:

[0039] (1) Heat the crucible to 205°C, spray a release agent on the crucible, add pure aluminum and heat to 780°C to melt, and keep it warm for 1.3h;

[0040] (2) Adding Mn: adding alloying element Mn to the high temperature aluminum liquid at 735°C, raising the temperature to 765°C and keeping it warm for 13 minutes to obtain molten metal A;

[0041] (3) Adding Ga and Pb: adding alloying elements Ga and Pb to molten metal A at 735°C, and stirring for 13 minutes to obtain molten metal B;

[0042] (4) Add Mg: add alloying element Mg to molten metal B at 735°C, stir for 8 minutes, ...

Embodiment 2

[0046] The difference from Example 1 is that the anode of an aluminum-air battery contains 0.02% Ga, 0.3% Mn, 2% Mg, 0.2% Pb according to 100 mass points, and the rest of the components are Al.

[0047] A method for preparing an aluminum-air battery anode. Aluminum alloy is smelted in a crucible, and the smelting and heating processes are all carried out in a crucible smelting furnace, including the following preparation steps:

[0048] (1) Heat the crucible to 202°C, spray a release agent on the crucible, add pure aluminum and heat to 775°C to melt, and keep warm for 1.2h;

[0049] (2) Adding Mn: adding alloy element Mn to the high temperature aluminum liquid at 733°C, raising the temperature to 755°C and keeping it warm for 11 minutes to obtain molten metal A;

[0050] (3) Adding Ga and Pb: adding alloying elements Ga and Pb to molten metal A at 732°C, and stirring for 11 minutes to obtain molten metal B;

[0051] (4) Add Mg: Add alloying element Mg to molten metal B at 733...

Embodiment 3

[0055] The difference from Example 1 is that the anode of an aluminum-air battery contains 0.04% Ga, 0.5% Mn, 4% Mg, 0.5% Pb, and the rest of the components are Al.

[0056] A method for preparing an aluminum-air battery anode. Aluminum alloy is smelted in a crucible, and the smelting and heating processes are all carried out in a crucible smelting furnace, including the following preparation steps:

[0057] (1) Heat the crucible to 208°C, spray a release agent on the crucible, add pure aluminum and heat to 785°C to melt, and keep warm for 1.4h;

[0058] (2) Adding Mn: adding alloying element Mn to the high temperature aluminum liquid at 738°C, raising the temperature to 775°C and keeping it warm for 14 minutes to obtain molten metal A;

[0059] (3) Adding Ga and Pb: adding alloying elements Ga and Pb to molten metal A at 738°C, and stirring for 14 minutes to obtain molten metal B;

[0060] (4) Adding Mg: Add alloying element Mg to molten metal B at 738°C, stir for 9 minutes, w...

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Abstract

The invention relates to the technical field of aluminum-air batteries. For the problems that an aluminum-air battery anode in the prior art is complex in preparation process and poor in corrosion resistance, the present invention discloses an aluminum-air battery anode and a preparation method thereof. The aluminum-air battery anode is prepared from the following components in percentage by mass:0.01-0.05 of Ga, 0.2-0.6% of Mn, 1-5% of Mg, 0.1-0.6% of Pb and the balance of Al. The method comprises the following steps: (1) melting aluminum; (2) adding Mn; (3) adding Ga and Pb; (4) adding Mg;(5) removing slag; and (6) performing casting. The battery anode alloy prepared by adopting the method is good in electrochemical performance, due to the addition of the alloy elements, the anisotropism of anode material grains is reduced, the corrosion uniformity of the alloy is improved, the overpotential is low, the self-discharge rate is low, the hydrogen evolution overpotential is high, the harmful influence of the Fe element on the electrode can be eliminated, the preparation process is simple, the synthesis period is short, and the synthesis efficiency is high.

Description

technical field [0001] The invention relates to the technical field of aluminum-air batteries, in particular to an aluminum-air battery anode and a preparation method thereof. Background technique [0002] Battery technology is currently widely used in different green energy fields. Different batteries have their unique advantages. Aluminum-air batteries have the advantages of high specific energy, abundant and cheap raw materials, recyclable, and environmentally friendly, which are of great research value. The negative electrode of the aluminum-air battery is aluminum alloy, which is continuously consumed and generates Al(OH) when the battery is discharged. 3 . Aluminum is rich in sources and is the metal element with the highest content in the earth's crust. It is easy to process, soft in texture, and can be processed into various shapes; it is environmentally friendly and can be recycled, and most of the discharge products of the aluminum negative electrode can be recycl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/46H01M12/06C22C21/06C22C1/02
CPCH01M4/463H01M12/06C22C21/06C22C1/026Y02E60/10
Inventor 齐敏杰
Owner CHAOWEI POWER CO LTD
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