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Multi-element negative material magnesium alloy and preparation method thereof

A negative electrode material, magnesium alloy technology, applied in the field of multi-component negative electrode material magnesium alloy and its preparation, can solve the problems of undisclosed discharge performance, achieve the effects of shortening the activation time, stabilizing the discharge curve, and improving the intragranular structure

Active Publication Date: 2021-05-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, only the AP65 magnesium alloy anode material is disclosed at small current densities (≤20mA·cm -2 ), the discharge performance under high current density (≥100mA·cm -2 ) Discharge performance under

Method used

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  • Multi-element negative material magnesium alloy and preparation method thereof
  • Multi-element negative material magnesium alloy and preparation method thereof
  • Multi-element negative material magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0040] Table 1 shows the components and parts by weight of the magnesium alloy examples 1-3 of a multi-element negative electrode material.

[0041] Table 1 Components and parts by weight of Examples 1-3 of a magnesium alloy as a multi-element negative electrode material

[0042]

[0043] Note: In the table, the parameters before and after " / " in Mg are the amount of Mg in Mg-Hg alloy and Mg melt respectively.

Embodiment 1

[0045] (1) Preparation of Mg-Hg master alloy: According to the weight parts of each raw material in Example 1 in Table 1, put Mg and Hg in a sealed tank, heat and seal the smelting at 720°C for 2.0h, pour it on the flat ground 3 times, Water cooling to get Mg-Hg master alloy;

[0046] (2) According to the weight parts of each raw material in Example 1 in Table 1, first add Al, Pb, Mn, Zn, In, Ga, and the Mg-Hg master alloy obtained in step (1) into the Mg melt at 715°C in sequence, and At a speed of 2 turns / min, stir and smelt for 15 minutes, then add Ce at 740°C, stir and smelt for 25 minutes at a speed of 2 turns / min, and keep it for 20 minutes to obtain a mixed melt;

[0047] (3) The mixed melt obtained in step (2) is semi-continuously cast: the mixed melt is uniformly poured into the interlayer crystallizer filled with cooling water at 740°C, and the flow rate of the cooling water is 280L / min. After the first water cooling, the magnesium alloy melt solidifies and crystall...

Embodiment 2

[0049] (1) Preparation of Mg-Hg master alloy: According to the weight parts of each raw material in Example 2 of Table 1, put Mg and Hg in a sealed tank, heat and seal at 710°C for 2.5 hours, pour it on the flat ground 4 times, Water cooling to get Mg-Hg master alloy;

[0050] (2) According to the parts by weight of the raw materials in Example 2 of Table 1, first add Al, Pb, Mn, Zn, In, Ga, and the Mg-Hg master alloy obtained in step (1) into the Mg melt at 700°C in sequence, and in 1 At a speed of 1 revolution / min, stir and smelt for 20 minutes, then add Ce at 735°C, stir and smelt for 30 minutes at a speed of 1 revolution / min, and keep it for 10 minutes to obtain a mixed melt;

[0051] (3) The mixed melt obtained in step (2) is subjected to semi-continuous casting: the mixed melt is evenly poured into the interlayer crystallizer filled with cooling water at 730°C, and the flow rate of the cooling water is 250L / min. After the first water cooling, the magnesium alloy melt so...

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Abstract

The invention discloses a multi-element negative material magnesium alloy and a preparation method thereof. The multi-element negative material magnesium alloy comprises the following components in percentage by mass: 4-8% of Al, 3-7% of Pb, 0.2-0.4% of Mn, 0.5-1.0% of Zn, 0.6-1.0% of In, 0.8-4.0% of Ga, 0.7-1.7% of Hg, 0.1-0.3% of Ce and the balance Mg. The preparation method comprises the steps that (1) an Mg-Hg intermediate alloy is prepared; (2) the Al, Pb, Mn, Zn, In, Ga, Mg-Hg intermediate alloy and Ce are sequentially added into Mg melt to be stirred and smelted, and heat preservation and still standing are conducted; and (3) semi-continuous casting, homogenizing annealing, hot extrusion breakdown and hot rolling are carried out, and the alloy is obtained. The multi-element negative material magnesium alloy is high in activity, resistant to polarization, high in voltage platform, short in activation time and long in discharge time. The method is simple, low in cost and suitable for industrial production.

Description

technical field [0001] The invention relates to a magnesium alloy and a preparation method thereof, in particular to a multi-element negative electrode material magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy anode materials in my country are widely used as sacrificial anodes, or as anode materials for small current density discharges. However, the existing magnesium alloy anode materials have uneven corrosion, unstable voltage platform, and rapid voltage drop rate during use, making it difficult to popularize and apply. Moreover, the processing technology of magnesium alloy thin plates is difficult and the processing procedures are relatively complicated. [0003] CN110373562A discloses an AP65 magnesium alloy anode material for magnesium-air batteries and its preparation method and application. The preparation method includes the following steps: S1: putting the cast AP65 magnesium alloy modified by cerium and yttrium at 400-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22F1/06C22C1/03H01M4/90H01M12/06
CPCC22C23/02C22F1/06C22C1/03H01M4/9041H01M12/06
Inventor 童汇
Owner CENT SOUTH UNIV
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