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Magnesium alloy negative electrode plate for seawater battery and preparation method

A seawater battery and magnesium alloy technology, applied in battery electrodes, immersion batteries, circuits, etc., can solve the problems of insufficient discharge activity, serious polarization, and accelerated corrosion speed, and achieve low dislocation density, easy to fall off, and reduce electrical current. The effect of dual corrosion

Active Publication Date: 2022-02-15
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the lack of discharge activity and serious polarization of the existing magnesium alloys proposed above when used as the negative electrode of seawater batteries, especially the problem of accelerated corrosion caused by the increase of the cathodic second phase and the rupture of the oxide film cannot be overcome after the addition of indium element

Method used

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  • Magnesium alloy negative electrode plate for seawater battery and preparation method
  • Magnesium alloy negative electrode plate for seawater battery and preparation method
  • Magnesium alloy negative electrode plate for seawater battery and preparation method

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Embodiment 1

[0027] An embodiment of the present invention provides a method for preparing a magnesium alloy negative electrode plate, the method comprising the following steps:

[0028] Taking AZ61 (Mg: 6.1wt.%; Al: 0.93wt.%; Zn: 0.54wt.%; In: 0.2wt.%; Mn: 0.1wt.%), pure Mg (99.95%), pure In (greater than Or equal to 99.99%) as the raw material. Under the mixed atmosphere of CO2 (99vol%) and SF6 (1vol%), the magnesium alloy raw material containing indium element is smelted, specifically, the melting temperature of the magnesium alloy raw material containing indium element is 680°C. The mass percentage of the indium element in the magnesium alloy negative electrode is 0.5%. When the block is completely melted, it is fully stirred for 2 minutes and left to stand for 15 minutes, and then the melt is cast in a steel mold to obtain a block magnesium alloy negative electrode ingot , the magnesium alloy raw material is melted and then cast into shape and water-cooled to obtain a cast magnesium ...

Embodiment 2

[0032] An embodiment of the present invention provides a method for preparing a magnesium alloy negative electrode plate, the method comprising the following steps:

[0033] Taking AZ61 (Mg: 6.1wt.%; Al: 0.93wt.%; Zn: 0.54wt.%; In: 0.2wt.%; Mn: 0.1wt.%), pure Mg (99.95%), pure In (greater than Or equal to 99.99%) as the raw material. in CO 2 (99vol%) and SF 6 (1vol%) under the mixed atmosphere, the magnesium alloy raw material containing indium element is smelted, specifically, the melting temperature of the magnesium alloy raw material containing indium element is 720°C. The mass percentage of the indium element in the magnesium alloy negative electrode is 0.55%. When the block is completely melted, it is fully stirred for 2 minutes and left to stand for 15 minutes, and then the melt is cast in a steel mold to obtain a block magnesium alloy negative electrode ingot , the magnesium alloy raw material is melted and then cast into shape and water-cooled to obtain a cast magne...

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Abstract

The invention discloses a magnesium alloy negative electrode plate for a seawater battery and a preparation method. The method comprises the following steps: under a protective atmosphere, smelting a magnesium alloy raw material containing an indium element, after the magnesium alloy raw material is smelted, carrying out casting molding, and carrying out water cooling to obtain an as-cast magnesium alloy; preheating the as-cast magnesium alloy; performing heat preservation on the as-cast magnesium alloy between every two adjacent rolling passes, performing multi-pass hot rolling on the as-cast magnesium alloy on a hot roller, the downward pressing amount of the heating roller is controlled, recording the rolling deformation amount of the as-cast magnesium alloy, and air-cooling the as-cast magnesium alloy to obtain the deformed magnesium alloy; and cutting the edge of the metamorphosed magnesium alloy to obtain the magnesium alloy negative electrode plate for the seawater battery. The microstructure of the as-cast magnesium alloy is regulated and controlled through alloying and rolling deformation of the indium element, so that the as-cast magnesium alloy has relatively negative discharge potential and relatively high utilization efficiency, and is suitable for being used as a negative electrode material of a high-power seawater activated battery.

Description

technical field [0001] The invention belongs to the field of negative electrode materials for seawater batteries, and in particular relates to a magnesium alloy negative electrode plate for seawater batteries and a preparation method thereof. Background technique [0002] As a functional light alloy material, magnesium metal has the characteristics of abundant resources, environmental friendliness and high safety, and has been widely used in auto parts, electronic equipment and aerospace fields. In addition, magnesium also has a negative standard potential of -2.375V and a high energy density of 2.22Ah / g, so it can also be used as a promising battery negative electrode material. When it is submerged in seawater, the battery can be activated quickly using seawater as an electrolyte. At present, relatively mature anode materials for high-power seawater-activated batteries include AP65 and MT75 anodes developed by British Magnesium Electronics Company, and magnesium alloy anod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C23/02C22F1/06H01M4/46H01M6/34
CPCC22C1/02C22C23/02C22F1/06H01M4/466H01M6/34Y02E60/10
Inventor 江静华谷亚啸谢秋媛马爱斌吴浩然袁钰轩
Owner HOHAI UNIV
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