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A kind of aluminum-air battery ceramic particle composite anode material and preparation method thereof

An aluminum-air battery, ceramic particle technology, applied in battery electrodes, fuel cell-type half-cells and primary-cell-type half-cells, circuits, etc., can solve the problems of reduced anode electrochemistry, high price, and reduced reactivity, etc. Achieve the effect of good electrochemical activity, simple preparation method and low self-corrosion rate

Active Publication Date: 2022-04-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aluminum-air battery also has the following problems: the surface of aluminum is prone to produce a passivation film, which reduces the reactivity of aluminum in the electrolyte, and the potential of aluminum shifts positively, which leads to the polarization of the anode and the decrease of the anode's electrochemistry; In alkaline solution, a strong hydrogen evolution reaction occurs between aluminum and lye, and this self-corrosion leads to a great reduction in the service life of aluminum and the utilization rate of the anode
[0003] In order to solve the above problems, the aluminum anode materials currently used are high-purity aluminum materials. High-purity aluminum reduces the adverse effects of impurity elements on the performance of the anode. Commercial aluminum anode materials are further alloyed, and Bi is added to the ultra-pure aluminum matrix. , Sn, Mg, Ga, In and other elements play the role of activating the anode, increasing the overall hydrogen evolution overpotential of the aluminum alloy, and inhibiting self-corrosion. However, ultra-pure aluminum is expensive compared to general industrial pure aluminum. The improvement of electrochemical performance is limited, and the high cost of aluminum anodes limits the commercial demand of aluminum-air batteries

Method used

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  • A kind of aluminum-air battery ceramic particle composite anode material and preparation method thereof
  • A kind of aluminum-air battery ceramic particle composite anode material and preparation method thereof
  • A kind of aluminum-air battery ceramic particle composite anode material and preparation method thereof

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Embodiment 1

[0023] A preparation method of ceramic particle composite anode material for aluminum-air battery

[0024] The preparation method specifically comprises the following steps:

[0025] Step 1, fully cleaning and drying magnesium oxide particles with a particle size of 50 μm, and fully preheating at 300° C., and keeping the temperature for 1.5 hours to obtain preheated magnesium oxide particles;

[0026] Step 2, heating industrial pure aluminum 4N6 (the mass fraction of aluminum is more than 99.9%) to 710°C in a vacuum environment, so that the pure aluminum is completely melted, and then mixed with the preheated magnesium oxide particles with a mass fraction of 0.5wt.%. And stir, reduce the temperature to the semi-solid temperature of 640°C, continue to stir and heat to 690°C, stop heating and stirring, and cast to obtain the Al-MgO composite material;

[0027] Step 3: cutting the cast Al-MgO composite material ingot to obtain the aluminum-air battery composite anode, or rolling...

Embodiment 2

[0029] A preparation method of ceramic particle composite anode material for aluminum-air battery

[0030] The preparation method is the same as in Example 1, except that the mass fraction of 0.5 wt.% preheated magnesium oxide particles in step 2 is changed to 1 wt.% preheated magnesium oxide particles.

Embodiment 3

[0032] A preparation method of ceramic particle composite anode material for aluminum-air battery

[0033] The preparation method is the same as in Example 1, except that the preheated magnesium oxide particles with a mass fraction of 0.5 wt.% in step 2 are changed to 1.5 wt.% preheated magnesium oxide particles.

[0034]

[0035] A kind of preparation method of aluminum-air battery anode material

[0036] The preparation method is the same as that of Example 1, except that industrial pure aluminum 4N6 (the mass fraction of aluminum is more than 99.9%) is directly used as the anode material without adding any ceramic particles.

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Abstract

The invention relates to an aluminum-air battery ceramic particle composite anode material and a preparation method thereof, belonging to the field of metal materials. The preparation method provided by the invention includes: preheating the ceramic particles first, and mixing them with heated and melted pure aluminum or aluminum alloy, and then adopting ordinary aluminum melting furnace + mechanical stirring or vacuum semi-solid stirring technology to obtain evenly dispersed particles Composite anode material, the granular composite material obtained by casting is directly cut, or further press processed to make composite anode for aluminum-air battery. Because the preparation method provided by the invention is simple, the cost is low, the obtained composite anode material has good electrochemical activity in alkaline electrolyte, low self-corrosion rate, and high battery anode utilization, so the preparation method provided by the invention is suitable for large-scale Chemical production and processing.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to an aluminum-air battery ceramic particle composite anode material and a preparation method thereof. Background technique [0002] Aluminum-air batteries have the characteristics of high energy density, cheap electrode materials, easy to use, and environmental friendliness. Therefore, it has great commercial potential in applications such as electric vehicles and portable power supplies. However, the aluminum-air battery also has the following problems: the surface of aluminum is prone to produce a passivation film, which reduces the reactivity of aluminum in the electrolyte, and the potential of aluminum shifts positively, which leads to the polarization of the anode and the decrease of the anode's electrochemistry; In alkaline solution, a strong hydrogen evolution reaction occurs between aluminum and lye, and this self-corrosion causes the service life of aluminum and the utiliza...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36
CPCC22C1/1036C22C21/00H01M12/06H01M4/364H01M4/463Y02E60/10
Inventor 胡正飞俞佳晟莫凡
Owner TONGJI UNIV
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