A kind of multi-element alloy anode material for magnesium-air battery and preparation method thereof

An air battery and multi-element alloy technology, applied in battery electrodes, negative electrodes, electrical components, etc., can solve the problems of high cost, poor environmental protection, insufficient discharge activity and utilization rate, etc., and achieve convenient implementation, strong discharge activity, and inhibition of hydrogen evolution The effect of side effects

Active Publication Date: 2022-06-03
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of high cost and poor environmental protection caused by the insufficient discharge activity and utilization rate of traditional magnesium-air fuel cell anode materials and harmful elements such as lead, thallium and mercury, the present invention provides a multi-element alloy anode for magnesium-air batteries The material and its preparation method accelerate the peeling off of the discharge product from the surface of the magnesium anode, maintain the strong discharge activity of the electrode, suppress the hydrogen evolution side reaction of the anode, and improve the utilization rate of the anode

Method used

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  • A kind of multi-element alloy anode material for magnesium-air battery and preparation method thereof
  • A kind of multi-element alloy anode material for magnesium-air battery and preparation method thereof
  • A kind of multi-element alloy anode material for magnesium-air battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Take Mg-4Al-0.5Ga-1In-1Sn-0.2Ca-0.2Mn alloy as an example

[0051] The ingredients are made according to the following mass percentages:

[0052] Aluminum 4%;

[0053] Gallium 0.5%;

[0054] Indium 1%;

[0055] Tin 1%;

[0056] Calcium 0.2%;

[0057] Manganese 0.2%;

[0058] The balance is Mg.

[0059] S1. Prepare raw materials:

[0060] The raw materials are properly treated and cleaned to remove the corrosion and solvent, sand, oxide scale, etc. on the surface to prevent them from reacting with the magnesium solution and silicon, iron, hydrogen, oxidation inclusions, etc. from entering the solution. The treatment method mainly adopts the combination of sand blowing, mechanical grinding and chemical acid-base washing. All raw materials should be baked in an oven at about 150 ℃ for 20 to 30 minutes before smelting to remove the moisture.

[0061] S2. Preparation:

[0062] The mold is made of top-injection water-cooled copper mold with a diameter of 60 mm. The...

Embodiment 2

[0075] Take Mg-5Al-1Ga-1In-1Sn-0.2Ca-0.3Sr-0.2Mn alloy as an example

[0076] The ingredients are made according to the following mass percentages:

[0077] Aluminum 5%;

[0078] Gallium 1%;

[0079] Indium 1%;

[0080] Tin 1%;

[0081] Calcium 0.2%;

[0082] Strontium 0.3%;

[0083] Manganese 0.2%;

[0084] The balance is Mg.

[0085] The preparation process and the implementation process are the same as in Example 1, wherein: (4) the step refining temperature is 740 ° C, the total amount of refining agent is 1.5%, and the melt is allowed to stand for 15 minutes after refining, during which the surface melt is removed about every 5 minutes. scum.

[0086] Solution heat treatment:

[0087] The alloy ingot is heated to 400°C, after 6 hours of solution treatment, cooling treatment with room temperature water as the medium, and wire cutting into a magnesium anode plate.

Embodiment 3

[0089] Take Mg-6Al-2Ga-1In-1Sn-0.2Ca-0.3Sr-0.01Ti-0.2Mn alloy as an example

[0090] The ingredients are made according to the following mass percentages:

[0091] Aluminum 6%;

[0092] Gallium 2%;

[0093] Indium 1%;

[0094] Tin 1%;

[0095] Calcium 0.2%;

[0096] Strontium 0.3%;

[0097] Titanium 0.01%;

[0098] Manganese 0.2%;

[0099] The balance is Mg

[0100] The preparation process and implementation process are the same as in Example 1, wherein:

[0101] In the preparation stage, the Al-10Ti master alloy was added before the steps of refining and adding pure metals of tin, gallium and indium. Evenly, then remove surface dross. Add Al-10Ti master alloy. After all melted, the melt was stirred evenly again.

[0102] The temperature of the refining step was 750 °C, the total amount of refining agent was 1.5%, and the melt was allowed to stand for 15 minutes after refining, during which the surface slag was removed about every 5 minutes.

[0103] Solution heat...

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Abstract

The invention relates to a multi-element alloy anode material for a magnesium-air battery and a preparation method thereof. The chemical composition of the alloy anode material is: aluminum, gallium, indium, tin, manganese; one or more of strontium, calcium or titanium; impurity elements; and magnesium. The preparation method is to take pure magnesium, aluminum ingot, Al‑10Mn master alloy, Mg‑27Sr / Mg‑30Ca master alloy, Al‑10Ti master alloy, tin, gallium and indium pure metal raw materials, and put them into the crucible for melting after preheating , the molten metal is cast into an ingot in a water-cooled copper mold, and then the ingot is solid-solution treated to make a magnesium anode plate. Granular Mg Formed in Alloy Anode Materials 5 (In x Ga 1‑x ) 2 with Mg 2 The Sn phase synergistically inhibits the hydrogen evolution side reaction of the anode and accelerates the peeling of the discharge product from the surface of the magnesium anode, maintaining high discharge activity; at the same time, trace amounts of strontium, calcium and titanium elements and solid solution treatment further refine the structure and improve the first phase in the magnesium matrix. The two-phase distribution promotes the uniform dissolution of the anode and improves the utilization rate of the anode.

Description

technical field [0001] The invention belongs to the technical field of metal-air batteries, and particularly relates to a multi-element alloy anode material for magnesium-air batteries and a preparation method thereof. Background technique [0002] Problems such as insufficient energy supply, over-exploitation, and environmental pollution caused by the use of fossil fuels have adversely affected the current development of human beings. Magnesium-air fuel cells using magnesium and its alloys as anode materials have many electrochemical performance advantages such as low cost, cleanliness, safety, high theoretical voltage and energy density. As a potential green and clean energy, it has attracted widespread attention. [0003] Recent studies have reported that the alloying of elements such as gallium and tin can effectively improve the discharge activity and electrochemical performance of metal-air fuel cell anode materials. Zhang Shuai et al. have shown that the increase of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22C1/06C22C1/03C22F1/06H01M4/46H01M12/06
CPCC22C23/02C22C1/06C22C1/03C22F1/06H01M4/466H01M12/06H01M2004/027Y02E60/10
Inventor 万晓峰汪徐周井玲钱双庆程海正张福豹
Owner NANTONG UNIVERSITY
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