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Aluminum alloy electrode material and preparation method and application of aluminum alloy electrode material

A technology of aluminum alloy electrodes and aluminum alloy ingots, which is applied to battery electrodes, circuits, electrical components, etc., can solve problems that cannot meet the technical requirements of power supplies, hinder the application of alkaline aluminum-air batteries, and pollute the environment, and achieve corrosion rates Reduced, low price, uniform corrosion effect

Active Publication Date: 2016-12-07
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the elements with high hydrogen evolution overpotential contain toxic heavy metals, which will pollute the environment and cause harm to the human body, and should be avoided in metal alloys
At the same time, under the working condition of high current density, the aluminum alloy anode is severely polarized, and the stable working potential is relatively positive, which cannot meet the technical requirements of the power supply, which seriously hinders the application of alkaline aluminum-air batteries in actual industrial production.

Method used

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  • Aluminum alloy electrode material and preparation method and application of aluminum alloy electrode material
  • Aluminum alloy electrode material and preparation method and application of aluminum alloy electrode material
  • Aluminum alloy electrode material and preparation method and application of aluminum alloy electrode material

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preparation example Construction

[0032] The present application also provides a preparation method of the aluminum alloy electrode material, comprising the following steps:

[0033] After the Al ingot is melted, Mg, Sn, Ga and Al-RE are added, and ultrasonic vibration is performed, and then it is left to stand and cooled to obtain an aluminum alloy ingot;

[0034] The obtained aluminum alloy ingot is solid solution treated, then quenched, and then rolled to obtain an aluminum alloy electrode material.

[0035] The present application provides a method for preparing an aluminum alloy electrode material, which includes: smelting-solution treatment-quenching treatment-rolling, and finally an aluminum alloy electrode material is obtained.

[0036]According to the present invention, the smelting process is first carried out, that is, after the Al ingot is melted, Mg, Sn, Ga and Al-RE are added, ultrasonic vibration is carried out, and the aluminum alloy ingot is obtained after standing still and cooling. In the a...

Embodiment 1

[0045] Based on an aluminum ingot with a purity of 99.9%, the composition ratio of the selected aluminum alloy anode is: magnesium: 2.6wt%, tin: 0.7wt%, gallium: 0.03wt%, RE (specifically Al-20%Ce): 0.04 wt%, aluminum: balance.

[0046] Put the measured aluminum ingot in a graphite crucible, under the protection of an inert gas, wait until the furnace temperature rises to 735°C to completely melt the aluminum, stir and remove slag, then add other alloy elements wrapped in aluminum foil; import 800W power Ultrasonic vibration, the introduction time is 90s, then stand still for 10min, pour into graphite ark to cool naturally; place the cast aluminum ingot in a resistance furnace at 490°C for solid solution treatment for 4h, and quickly place it in cold water for quenching treatment; The ingot is rolled at 190°C into an aluminum alloy sheet with a thickness of 2mm, and cut into 1cm of the working area 2 Polish the electrodes with 400#, 600#, 800#, 1000#, 2000# sandpaper respecti...

Embodiment 2

[0050] Based on an aluminum ingot with a purity of 99.9%, the composition ratio of the aluminum alloy anode is selected as follows: magnesium: 0.1wt%, tin: 0.05wt%, gallium: 0.01wt%, RE (specifically Al-20%Ce): 0.02 wt%, aluminum: balance.

[0051] Put the measured aluminum ingot in a graphite crucible, under the protection of an inert gas, wait until the furnace temperature rises to 700°C to completely melt the aluminum, stir and remove slag, then add other alloy elements wrapped in aluminum foil; import a 500W power Ultrasonic vibration, the introduction time is 60s, then stand still for 10min, pour into graphite ark to cool naturally; place the cast aluminum ingot in a resistance furnace at 450°C for solid solution treatment for 3h, and quickly place it in cold water for quenching treatment; The ingot is rolled at 150°C into an aluminum alloy sheet with a thickness of 2mm, and cut into 1cm of the working area 2 Polish the electrodes with 400#, 600#, 800#, 1000#, 2000# sand...

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Abstract

The invention provides an aluminum alloy electrode material. The aluminum alloy electrode material comprises 0.1-3 wt% of Mg, 0.05-1 wt% of Sn, 0.01-0.5 wt% of Ga, 0.02-0.1 wt% of RE and the balance Al. According to the aluminum alloy electrode material, an aluminum substrate is doped with a certain amount of magnesium, stannum, gallium and the rare earth element, on the basis of improving the activity of an aluminum anode, through the refining function of the rear earth element on grains, corrosion of the aluminum anode is evener, and the corrosion rate is lowered; meanwhile on the one hand, due to addition of the elements, the electrochemical performance of the aluminum alloy is good; on the other hand, the added elements are free of contamination; and the rare earth element is added in the form of an aluminum rare earth master alloy, and the price is low. The invention further provides a preparation method of the aluminum alloy electrode material and application of the aluminum alloy electrode material in air batteries.

Description

technical field [0001] The invention relates to the technical field of air batteries, in particular to an aluminum alloy electrode material, its preparation method and its application. Background technique [0002] Metal-air battery (MAB) has the characteristics of high energy density, low cost, green and pollution-free, long discharge life and safe use, and is called "green energy for the 21st century". The energy density of MAB depends only on the metal electrode, the greater the energy density of the metal electrode, the greater the energy density of the battery. Aluminum-air batteries have become a research hotspot in the field of MBA recently because of their high energy density (2980Ah / kg, second only to lithium), low price, and abundant reserves. [0003] Aluminum is a good battery anode material. The standard electrode potential is -1.65V (vs. SCE) in a neutral electrolyte environment and -2.35V (vs. SCE) in a strong alkaline electrolyte environment, but aluminum T...

Claims

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Application Information

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IPC IPC(8): C22C21/06C22C21/00C22C1/03C22F1/047C22F1/04H01M4/46H01M12/06
CPCC22C1/026C22C1/03C22C21/00C22C21/06C22F1/002C22F1/04C22F1/047H01M4/463H01M12/06Y02E60/10
Inventor 王勤刘兆平苗鹤薛业建孙珊珊张勤号李世华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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