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Magnesium alloy plate serving as battery cathode and preparation method thereof

A battery negative electrode and magnesium alloy technology, which is applied in the field of magnesium alloy plates and its preparation, can solve the problems of magnesium polarization, corrosion, and failure to meet application standards, and achieve the effects of increased strength and plasticity, excellent performance, and good processing performance

Inactive Publication Date: 2013-02-13
CHONGQING UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

However, it has not been widely used. One of the main reasons is that the polarization and corrosion of magnesium in the electrolyte are serious, which makes it impossible to meet the application standards and meet the actual requirements.

Method used

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  • Magnesium alloy plate serving as battery cathode and preparation method thereof
  • Magnesium alloy plate serving as battery cathode and preparation method thereof
  • Magnesium alloy plate serving as battery cathode and preparation method thereof

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Embodiment 1

[0027] The magnesium alloy plate used as the negative electrode of the battery in this embodiment consists of the following components in terms of mass percentage:

[0028] Li 5.0%;

[0029] Al 1.0%;

[0030] Impurities ≤0.3%;

[0031] Magnesium balance.

[0032] The preparation method of the magnesium alloy plate used as the negative electrode of the battery in this embodiment is to heat the formulated amount of pure magnesium, pure lithium and pure aluminum to 720° C. under the condition of vacuuming and passing in an inert gas. After the alloy is completely melted, Keep the temperature at 700°C for 15 minutes, then pour the melted alloy liquid into the mold to obtain the as-cast magnesium alloy; heat the as-cast magnesium alloy at 380°C for 3 hours, and then extrude it into a magnesium alloy plate with a thickness of 2mm and a width of 120mm (The tonnage of the extrusion machine is 1250T, the diameter of the extrusion barrel is 165mm, and the extrusion ratio: 89).

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Abstract

The invention discloses a magnesium alloy plate serving as a battery cathode and a preparation method thereof. The magnesium alloy plate consists of the following components in percentage by mass: 4.0-6.0% of Li, 0.8-1.2% of Al, less than or equal to 0.3% of impurity and the balance of magnesium. The preparation method of the magnesium alloy plate comprises the following steps of: heating pure magnesium, pure lithium and pure aluminum of the formula amount to 720 DEG C under the conditions of vacuumizing and introducing an inert gas; after the alloy is completely molten, keeping the temperature at 700 DEG C and standing for 15 minutes; then pouring the molten alloy liquid into a die to obtain a cast-state magnesium alloy; and keeping the temperature of the cast-state magnesium alloy at 380 DEG C for 3 hours, and extruding to obtain the magnesium alloy plate. The magnesium alloy plate disclosed by the invention has relatively high activity, good discharge performance, corrosion resistance and good mechanical performance, and is a magnesium cathode material with excellent performance.

Description

technical field [0001] The invention relates to a magnesium alloy material and a preparation method thereof, in particular to a magnesium alloy plate used as a battery negative electrode and a preparation method thereof. Background technique [0002] In recent years, the widespread popularity of portable electronic devices has led to the development of batteries. Magnesium electrode materials have many advantages such as low cost, non-toxic, non-polluting, stable discharge voltage, high specific energy, high specific power, abundant resources, and renewable, and have attracted widespread attention. However, it has not been widely used. One of the main reasons is that the polarization and corrosion of magnesium in the electrolyte are serious, which makes it difficult to meet the application standards and meet the actual requirements. [0003] Therefore, it is of great theoretical and engineering practical significance to develop new magnesium alloy materials that add alloyi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/02B21C23/02
Inventor 蒋斌潘复生李瑞红杨青山曾迎
Owner CHONGQING UNIV
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