Anode alloy material for magnesium air battery, preparation method thereof and battery

An anode alloy and air battery technology, applied in the field of materials, can solve the problems of large magnesium, strong hydrogen evolution, self-corrosion, and hindering the dissolution of magnesium anodes

Active Publication Date: 2020-10-20
GUANGDONG INST OF NEW MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an anode for magnesium-air batteries, magnesium alloys have many problems. First, magnesium has a strong hydrogen evolution self-corrosion, and a large amount of hydrogen is generated during the discharge process, resulting in a decrease in the Faradaic efficiency of the anode.
Secondly, the magnesium anode will produce dense Mg(OH)

Method used

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  • Anode alloy material for magnesium air battery, preparation method thereof and battery

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Experimental program
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Example Embodiment

[0028] The preparation method of the anode alloy material for the magnesium-air battery includes:

[0029] The cast slab is subjected to solution treatment, rolling, and annealing, and the content of each element component contained in the cast slab matches the element component content of the anode alloy material to be prepared.

[0030] Specifically:

[0031] S1, preparation of cast slab

[0032] Prepare the material according to the content requirements of each element component in the anode alloy material. Then, the pure magnesium ingot is melted and then pure aluminum, pure bismuth, pure calcium, Mg-Ca alloy and Mg-Ce alloy are added to it, and then refined, stirred, slag-removed, and placed to obtain a casting billet.

[0033] Preferably, Mg-Ca alloy and Mg-Ce alloy are respectively selected as Mg-20Ca master alloy and Mg-25Ce master alloy.

[0034] S2, solution treatment

[0035] The slab is obtained by solution treatment of the cast slab in a two-stage solution treatment method. ...

Example Embodiment

[0049] Example 1

[0050] Material preparation: According to the mass percentage content of each element in the alloy:

[0051] 7.5% Al, 5.6% Ca, 3.4% Bi, 3.5% Ce, the limiting elements are Fe≤0.01%, Cu≤0.01%, Ni≤0.01%, and the rest are Mg for material preparation.

[0052] First, the pure magnesium ingot with a magnesium content of 99.99% is heated and melted. Under the protection of the flux, the temperature is raised to 680~760℃ for smelting. According to the composition ratio, pure aluminum, pure bismuth and Mg-20Ca and Mg-25Ce master alloys are added successively. Refining, stirring, removing slag, pouring after standing to obtain a magnesium alloy anode material cast blank for air battery.

[0053] Then, the cast slab is subjected to two-stage solution treatment, the low-temperature solution temperature is 350℃, and the holding time is 4h; the high-temperature solution temperature is 480℃, and the holding time is 9h; the slab after the two-stage solution treatment is removed fro...

Example Embodiment

[0054] Example 2

[0055] Material preparation: According to the mass percentage content of each element in the alloy:

[0056] 1.5% Al, 6.5% Ca, 0.2% Bi, 4.0% Ce, restricted elements Fe≤0.01%, Cu≤0.01%, Ni≤0.01%, and the rest are Mg for material preparation.

[0057] First, the pure magnesium ingot with a magnesium content of 99.99% is heated and melted. Under the protection of the flux, the temperature is raised to 680°C for smelting. According to the composition ratio, pure aluminum, pure bismuth and Mg-20Ca and Mg-25Ce master alloys are added successively. Stirring, removing slag, pouring after standing to obtain a magnesium alloy anode material cast blank for air battery.

[0058] Then, the cast slab is subjected to two-stage solution treatment, the low-temperature solution temperature is 300℃, and the holding time is 2h; the high-temperature solution temperature is 400℃, and the holding time is 8h; the slab after the two-stage solution treatment is removed from the surface Afte...

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Abstract

The invention discloses an anode alloy material for a magnesium-air battery, a preparation method thereof, and a battery, and relates to the technical field of materials. The anode alloy material formagnesium air battery is prepared from the components in percentage by mass: 1.5% to 11.5% of Al, 0.5% to 6.5% of Ca, 0.2% to 6.0% of Bi, 0.1% to 4.0% of Ce, the limiting elements Fe less than or equal to 0.01%, Cu less than or equal to 0.01%, Ni less than or equal to 0.01%, and the balance of Mg. The preparation method of the anode alloy material for the magnesium air battery comprises the stepsof solid solution treatment, rolling, and annealing on casting blanks. The content of each element contained in the casting blanks is matched with the element content of the anode alloy material to beprepared. The anode alloy material can increase the hydrogen evolution overpotential of the magnesium anode, effectively inhibit the hydrogen evolution reaction. The material can make discharge potential relatively negative and the anode utilization rate high. The anode of the battery is made of the alloy materials prepared by the preparation method, and the performance of the alloy materials isgood.

Description

Technical field [0001] The present invention relates to the technical field of materials, in particular, to an anode alloy material for magnesium-air batteries, a preparation method thereof, and a battery. Background technique [0002] Magnesium-air battery is a metal fuel cell composed of three parts: positive electrode, negative electrode, and electrolyte. Magnesium-air batteries have the advantages of rich resources, high reaction activity, light weight, non-polluting reaction products, low price, wide operating temperature range, high safety, and high theoretical energy density. The earliest application of magnesium-air batteries can be traced back to the 1960s, when the United States General Electric Company developed neutral electrolyte magnesium-air batteries. At present, magnesium-air batteries can be used as emergency backup power in hospitals, schools and other places, military, communications and other fields, and can also be used as underwater power sources as power ...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C23/02C22C23/06C22F1/06C22C1/03H01M4/86H01M12/06
CPCC22C1/03C22C23/00C22C23/02C22C23/06C22F1/06H01M4/86H01M12/06H01M2004/8689
Inventor 赵虎黄正华周楠康跃华
Owner GUANGDONG INST OF NEW MATERIALS
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