A kind of negative electrode material magnesium alloy and preparation method thereof

A negative electrode material, magnesium alloy technology, applied in the direction of battery electrodes, structural parts, electrical components, etc., can solve the problems of poor electrochemical performance and complicated process, and achieve improved electrochemical performance, simple process, and long stable working time Effect

Active Publication Date: 2022-02-15
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process is complicated and the electrochemical performance is not good

Method used

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  • A kind of negative electrode material magnesium alloy and preparation method thereof
  • A kind of negative electrode material magnesium alloy and preparation method thereof
  • A kind of negative electrode material magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0042] The components and parts by weight of a negative electrode material magnesium alloy Examples 1-3 and Comparative Example 1 are shown in Table 1.

[0043] Table 1 Components and parts by weight of a negative electrode material magnesium alloy Examples 1-3 and Comparative Example 1

[0044]

[0045] 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

[0047] (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;

[0048] (2) According to the weight parts of each raw material in Example 1 in Table 1, first add In, Ga, and the Mg-Hg master alloy obtained in step (1) into the Mg melt at 715°C in sequence, and stir at a speed of 2 turns / min After smelting for 15 minutes, add Ce at 740°C, stir and smelt for 25 minutes at a speed of 2 revolutions / min, keep the temperature for 20 minutes, and obtain a mixed melt;

[0049] (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

[0051] (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;

[0052] (2) According to the weight parts of each raw material in Example 2 in Table 1, first add In, Ga, and the Mg-Hg master alloy obtained in step (1) into the Mg melt at 700°C in sequence, and stir at a speed of 1 revolution / min After smelting for 20 minutes, 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;

[0053] (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 solidifies and crystallizes...

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Abstract

A negative electrode material magnesium alloy and a preparation method thereof. The negative electrode material magnesium alloy includes the following components in mass percentage: In 0.6-1.0%, Ga 0.8-4.0%, Hg 0.7-1.7%, Ce 0.1-0.3%, and for Mg. The preparation method is as follows: (1) preparing Mg-Hg master alloy; (2) sequentially adding In, Ga, Mg-Hg master alloy and Ce into Mg melt, stirring and smelting, heat preservation and standing to obtain a mixed melt; (3) Semi-continuous casting, homogenizing annealing, hot extrusion billet opening, hot rolling, and it is ready. The negative electrode material magnesium alloy of the invention has high activity, anti-polarization, high voltage platform and moderate hydrogen evolution capacity; the method of the invention has simple process and low cost, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to a magnesium alloy and a preparation method thereof, in particular to a negative electrode material magnesium alloy and a preparation method thereof. Background technique [0002] Under the lightweight requirements of my country's transportation, national defense and military industries, there is a large demand for magnesium alloy materials. However, the existing magnesium alloy materials have more rough machining and less deep machining. [0003] In particular, magnesium alloy as an electrode material has a stable voltage platform and moderate hydrogen evolution, making it suitable as a battery material. However, the processing technology of magnesium alloy thin plate is difficult and the processing procedures are complicated, so it is difficult to popularize and apply. [0004] CN105296772A discloses a method for preparing a negative electrode material magnesium alloy. Step 1: drill a blind hole on a pure magnesium ingot; pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/03C22F1/06H01M4/46
CPCC22C23/00C22C1/03C22F1/06H01M4/466Y02E60/10
Inventor 童汇
Owner CENT SOUTH UNIV
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