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A kind of rare earth-free aluminum alloy and its preparation method and application

An aluminum alloy and rare earth-free technology is applied in the field of rare-earth-free aluminum alloy and its preparation, which can solve the problems of reduced discharge voltage and energy density, reduced electrochemical activity, and high production cost, and achieves improved discharge voltage and energy density. The effect of increasing the activity and improving the discharge activity

Active Publication Date: 2022-06-24
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] But at present, for aluminum alloy materials, it is still easy to form a dense oxide film on the surface, which hinders the contact between aluminum and electrolyte in the electrode reaction, and passivation occurs, which makes the electrode potential drop rapidly, the electrochemical activity is reduced, and the discharge Reduced voltage and energy density
Chinese patent CN111740094A discloses an aluminum alloy in which the rare earth element Ce is combined with the elements In, Sn and Mg to refine the grains of the alloy, weaken the polarization, and improve the discharge voltage and energy density of the aluminum anode plate, but the price of the rare earth element Expensive and high production costs limit the popularization and use of aluminum-air batteries

Method used

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  • A kind of rare earth-free aluminum alloy and its preparation method and application
  • A kind of rare earth-free aluminum alloy and its preparation method and application
  • A kind of rare earth-free aluminum alloy and its preparation method and application

Examples

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preparation example Construction

[0030] The present invention also provides the preparation method of the rare earth-free aluminum alloy described in the above technical solution, comprising the following steps:

[0031] According to the mass ratio of the metal elements in the above-mentioned rare earth-free aluminum alloy, the Bi source, the In source, the Mg source and the Al source are mixed and melted to obtain a molten liquid;

[0032] After the molten liquid is cast and formed, rolling and annealing are performed in sequence to obtain the rare earth-free aluminum alloy.

[0033] In the present invention, unless otherwise specified, all raw materials are commercially available products well known to those skilled in the art.

[0034] In the present invention, the Bi source, the In source, the Mg source and the Al source are mixed and melted according to the mass ratio of the metal elements in the above-mentioned rare-earth-free aluminum alloy to obtain a molten liquid.

[0035] In the present invention,...

Embodiment 1

[0048] The metal aluminum was melted at 760 ° C for 10 min to obtain molten aluminum;

[0049] Adding metal bismuth, metal indium and metal magnesium wrapped with aluminum foil into molten aluminum, and performing second melting under stirring, the melting temperature is 760° C., and the time is 10 minutes to obtain molten aluminum;

[0050] The mold is preheated, and after reaching 240 ° C, the molten liquid is poured into the mold for casting and molding, and the casting molding time is 5 minutes to obtain a 1 cm thick molding plate;

[0051] The formed sheet is cold rolled, and the thickness of each pass is 0.1 cm, and a rolled sheet with a thickness of 0.2 cm is obtained after rolling 8 times;

[0052] The rolled sheet was annealed at 350 °C for 6 h to obtain a rare earth-free aluminum alloy.

Embodiment 2～5 and comparative example 1～3

[0054] The aluminum alloy was prepared according to the method of Example 1, wherein the components of each Example and Comparative Example are shown in Table 1.

[0055] Table 1 Composition of the aluminum alloys prepared in Examples 1-5 and Comparative Examples 1-3

[0056] Bi / wt% In / wt% Mg / wt% Al / wt% Example 1 0.2 0.075 0.5 99.225％ Example 2 0.4 0.075 0.5 99.025％ Example 3 0.6 0.075 0.5 98.825％ Example 4 0.8 0.075 0.5 98.625％ Example 5 1.0 0.075 0.5 98.425％ Comparative Example 1 0 0 0 100％ Comparative Example 2 0 0.075 0.5 99.425％ Comparative Example 3 0 0.5 0.5 99.0％

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Abstract

The invention belongs to the technical field of aluminum-air batteries, and in particular relates to a rare earth-free aluminum alloy and its preparation method and application. The rare earth-free aluminum alloy provided by the present invention includes the following elemental components in mass percent: Bi 0.2-1.0%, In 0.05-0.2%, Mg 0.2-1.0%, and the balance Al. In the present invention, Bi, In and Mg are added to the aluminum matrix, and the dense oxide film is destroyed by hole action and eutectic melt, and the resistance of the oxide film is reduced. When it is applied to the anode of the aluminum-air battery, the The electrochemical activity of the anode improves the discharge voltage and energy density of the Al-air battery.

Description

technical field [0001] The invention belongs to the technical field of aluminum-air batteries, and particularly relates to a rare earth-free aluminum alloy and a preparation method and application thereof. Background technique [0002] As a new type of energy battery, aluminum-air battery is widely used in transportation, industrial production and marine emergency equipment due to its advantages of light weight, zero pollution, high specific energy, low cost and good safety. [0003] The traditional aluminum-air battery uses pure aluminum as the anode material, but only when the purity of aluminum reaches more than 99.999% can it be used as the anode of the aluminum-air battery, which requires high requirements for the electrolytic preparation process of aluminum and increases the cost of the battery. , usually need to be alloyed. By adopting the alloying treatment, the cost can be reduced, and at the same time, it can meet the use requirements of the anode of the aluminum-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C21/06C22C1/02H01M4/46H01M12/06
CPCC22C21/00C22C21/06C22C1/026H01M4/463H01M12/06Y02E60/10
Inventor 谢刚王发强俞小花沈庆峰刘春侠李影赵天宇谭皓天
Owner KUNMING UNIV OF SCI & TECH
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