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A kind of aluminum-air battery anode and preparation method thereof

An aluminum-air battery and anode technology, applied in battery electrodes, fuel cell half-cells, primary battery half-cells, circuits, etc., can solve poor corrosion resistance, high hydrogen evolution overpotential, and low self-discharge rate and other problems, to achieve the effect of eliminating harmful effects, high hydrogen evolution overpotential, and low self-discharge rate

Active Publication Date: 2022-06-21
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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  • A kind of aluminum-air battery anode and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0037] An anode for an aluminum-air battery, based on 100 mass points, contains components: 0.03% Ga, 0.45% Mn, 2.5% Mg, 0.3% Pb, and the rest of the components are Al.

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

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

[0040] (2), adding Mn: adding alloying element Mn to the high-temperature aluminum liquid at 735 °C, heating up to 765 °C and holding the temperature 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 min to obtain molten metal B;

[0042] (4), add Mg: add alloying element Mg in 735 ℃ of m...

Embodiment 2

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

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

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

[0049] (2), adding Mn: adding alloying element Mn to the high-temperature aluminum liquid at 733 °C, heating up to 755 °C, and then maintaining the temperature for 11 min to obtain molten metal A;

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

[0051] (4), add Mg: add alloying elem...

Embodiment 3

[0055] The difference from Example 1 is that an aluminum-air battery anode, based on 100 mass points, contains components: 0.04% Ga, 0.5% Mn, 4% Mg, 0.5% Pb, and the rest are Al.

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

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

[0058] (2), adding Mn: adding alloying element Mn to the high-temperature aluminum liquid at 738 °C, heating up to 775 °C and then keeping the temperature 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 min to obtain molten metal B;

[0060] (4), add Mg: in 738 ℃ of molten metal B,...

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Abstract

The invention relates to the technical field of aluminum-air batteries. Aiming at the problems of complex preparation process and poor corrosion resistance of aluminum-air battery anodes in the prior art, an aluminum-air battery anode and a preparation method thereof are disclosed. According to 100 mass points, Composition: 0.01‑0.05%Ga, 0.2‑0.6%Mn, 1‑5%Mg, 0.1‑0.6%Pb, and the rest are Al. Including: (1), melting aluminum; (2), adding Mn; (3), adding Ga and Pb; (4), adding Mg; (5), removing slag; (6), casting. The battery anode alloy prepared by the invention has good electrochemical properties, the addition of various alloy elements reduces the anisotropy of the anode material grains, improves the corrosion uniformity of the alloy, has low overpotential, low self-discharge rate, and relatively low hydrogen evolution overpotential High, and can eliminate the harmful effect of Fe element on the electrode, the preparation process is simple, the synthesis cycle 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 anode of an aluminum-air battery and a preparation method thereof. Background technique [0002] Battery technology is currently widely used in different green energy fields, and different batteries have their own unique advantages. Aluminum-air batteries have the advantages of high specific energy, abundant and cheap raw materials, recyclability, and environmental friendliness, and are of great research value. The negative electrode of the aluminum-air battery is an aluminum alloy, which is continuously consumed and formed 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. [0003] Industrial pure aluminum contains impurities such as iro...

Claims

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Application Information

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Patent Type & Authority Patents(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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