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Magnesium alloy and preparing method and application thereof

A magnesium alloy and pure magnesium technology, applied in the field of magnesium-air batteries, can solve the problems of not reaching the ideal state, hysteresis effect, limitation, etc.

Inactive Publication Date: 2020-08-25
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many anode materials for magnesium seawater activated batteries, such as AZ series (AZ31, AZ63, etc.), the addition of Al and Zn effectively inhibits the self-corrosion of magnesium alloys, but at the same time, the dense passivation film on the surface also causes AZ series alloys to There is a serious hysteresis effect, and its electrode potential is relatively positive, and the discharge activity is low
Ap65 series, Mg-Al-Tl series and Mg-Hg-Ga etc. have high voltage and acceptable efficiency, but are limited due to their strong toxicity
In addition, there are Mg-Al-Sn alloys that have been studied, but they still cannot reach the ideal state

Method used

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  • Magnesium alloy and preparing method and application thereof
  • Magnesium alloy and preparing method and application thereof
  • Magnesium alloy and preparing method and application thereof

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preparation example Construction

[0023] The present invention provides a method for preparing the magnesium alloy described in the above technical solution, which includes the following steps:

[0024] Melting pure magnesium to obtain a magnesium melt;

[0025] According to the composition ratio of the anode material of the magnesium-air battery, the magnesium melt is mixed with tin particles and indium particles, cast, and cooled to obtain a magnesium alloy.

[0026] In the present invention, unless otherwise specified, all required preparation materials are commercially available products well known to those skilled in the art.

[0027] In the present invention, pure magnesium is smelted to obtain a magnesium melt. In the present invention, the purity of the pure magnesium is preferably ≥99.99%, and the pure magnesium is preferably industrial pure magnesium. Before weighing the pure magnesium according to the composition of the magnesium alloy, the present invention preferably sands off the oxide film on the surfa...

Embodiment 1

[0037] The composition ratio of magnesium alloy is Mg-0.5wt.%Sn-1.5wt.%In;

[0038] Preparation:

[0039] Preparation: Grind industrial pure magnesium (Mg purity ≥99.99%) with sandpaper, use an electronic balance to weigh and calculate the industrial pure magnesium, pure tin particles (Sn≥99.8%) and pure tin required to prepare Mg-Sn-In alloy The quality of indium particles (In≥99.99%).

[0040] The surface of the crucible is cleaned, and the surface of the crucible, crucible tongs, slag removal tool and right-angle stainless steel mold is repeatedly and evenly painted with paint (the quality of each component in the paint is 300g talc powder, 100g water glass and 1000g deionized water. ).

[0041] Melting and casting: The PDM-1 magnesium alloy melting furnace is heated from room temperature for the first time (heating rate is 6°C / min) to 650°C, and the crucible containing the magnesium block (161.72g) is clamped into the magnesium with crucible tongs The alloy melting furnace is fi...

Embodiment 2

[0044] The difference between this embodiment and Embodiment 1 is only that the composition ratio of the magnesium alloy is Mg-1wt.%Sn-2wt.%In, the raw material used is 143.886g pure magnesium blocks, 3.076g indium particles, and 1.495g tin particles.

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Abstract

The invention provides a magnesium alloy and a preparing method and application thereof, and belongs to the technical field of magnesium air batteries. The composition of the magnesium alloy is Mg-xSn-yIn, wherein x is larger than or equal to 0.5wt.% and smaller than or equal to 5wt.%, y is larger than or equal to 0.5wt.% and smaller than or equal to 3wt.%, magnesium serves as the basis, indium and tin are added into pure magnesium, and the Mg-Sn-In ternary magnesium alloy can be obtained. Indium and tin can well regulate the microstructure and morphology of the magnesium alloy, the microstructure and morphology of the Mg-Sn-In ternary magnesium alloy can trigger a large amount of discharge active sites at the same time, extensive dendrite segregation formed by tin and indium can generatea potential difference, the discharge performance of the magnesium alloy is ensured, and compared with the pure magnesium, the Mg-Sn-In ternary magnesium alloy has the more excellent discharge performance, and the alloy is an ideal magnesium air battery anode material.

Description

Technical field [0001] The invention relates to the technical field of magnesium-air batteries, in particular to a magnesium alloy and a preparation method and application thereof. Background technique [0002] Magnesium is very active and has a very negative potential. Its standard electrode potential is -2.37V (vs. SCE). Magnesium easily loses two electrons and exhibits lively chemical properties. When magnesium is used as the anode, a more negative potential can increase the electrochemical reaction activity and obtain a larger discharge current. In addition, the relative atomic mass of magnesium is small, and at the same time, magnesium atoms react to form magnesium ions Mg 2+ When two electrons are lost, according to Faraday’s law, when 1 mol of magnesium is oxidized, 2 mol of electrons will be transferred. Therefore, the energy density of magnesium is very large, theoretically up to 2205Ah·kg -1 This means that a unit mass of magnesium can provide more electricity to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/02H01M4/46H01M12/06
CPCC22C1/02C22C23/00H01M4/466H01M12/06Y02E60/10
Inventor 卫英慧阴明侯利锋刘笑达杜华云刘宝胜
Owner TAIYUAN UNIV OF TECH
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