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Magnesium alloy for magnesium secondary battery negative electrode material and preparation method of magnesium alloy

A negative electrode material, magnesium alloy technology, applied in the field of materials, can solve the problems of cycle performance and corrosion resistance, and achieve the effects of low cost, improved corrosion resistance, and simple process

Inactive Publication Date: 2017-09-29
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Magnesium series batteries have been widely concerned as a new type of environmentally friendly energy, but the existing magnesium anode materials cannot balance cycle performance and corrosion resistance.

Method used

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  • Magnesium alloy for magnesium secondary battery negative electrode material and preparation method of magnesium alloy
  • Magnesium alloy for magnesium secondary battery negative electrode material and preparation method of magnesium alloy
  • Magnesium alloy for magnesium secondary battery negative electrode material and preparation method of magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The Mg-6%Y-3%Zn magnesium alloy is processed into a hollow cylinder and a corresponding solid round rod by wire cutting. The inner diameter of the hollow cylinder is 6mm, the outer diameter is 10mm, and the height is 10mm. The diameter of the solid round rod is equal to the inner diameter of the hollow cylinder. , with a height of 4mm; use sandpaper to polish the surface of the Mg-6%Y-3%Zn alloy to remove the oxide layer;

[0023] Put the arsenic element into the above-mentioned Mg-6%Y-3%Zn alloy hollow cylinder, seal the two ends of the hollow cylinder with solid round rods, then wrap the whole hollow cylinder with tantalum film, and put the wrapped alloy into graphite Put the sealed graphite tube into the middle of a circular hole in the middle of a cubic pyrophyllite block, and finally seal the top and bottom of the graphite tube with two graphite sheets with the same diameter as the outer diameter of the graphite tube. Set two conductive steel rings at the end;

[...

Embodiment 2

[0027] The Mg-6%Y-9%Zn ​​magnesium alloy is processed into a hollow cylinder and a corresponding solid round rod by wire cutting. The inner diameter of the hollow cylinder is 7mm, the outer diameter is 11mm, and the height is 13mm. The diameter of the solid round rod is equal to the inner diameter of the hollow cylinder. , with a height of 5mm; use sandpaper to polish the surface of the Mg-6%Y-9%Zn ​​alloy to remove the oxide layer;

[0028] Put the arsenic element into the above-mentioned Mg-6%Y-9%Zn ​​alloy hollow cylinder, seal the two ends of the hollow cylinder with solid round rods, then wrap the whole hollow cylinder with tantalum film, and put the wrapped alloy into graphite Put the sealed graphite tube into the middle of a circular hole in the middle of a cubic pyrophyllite block, and finally seal the top and bottom of the graphite tube with two graphite sheets with the same diameter as the outer diameter of the graphite tube. Set two conductive steel rings at the end...

Embodiment 3

[0032] The Mg-2%Er-1%Zn magnesium alloy is processed into a hollow cylinder and a corresponding solid round rod by wire cutting. The inner diameter of the hollow cylinder is 8mm, the outer diameter is 12mm, and the height is 16mm. The diameter of the solid round rod is equal to the inner diameter of the hollow cylinder. , with a height of 7mm; use sandpaper to polish the surface of the Mg-2%Er-1%Zn alloy to remove the oxide layer;

[0033] Put the arsenic element into the above-mentioned Mg-2%Er-1%Zn alloy hollow cylinder, seal the two ends of the hollow cylinder with solid round rods, then wrap the whole hollow cylinder with tantalum film, and put the wrapped alloy into graphite Put the sealed graphite tube into the middle of a circular hole in the middle of a cubic pyrophyllite block, and finally seal the top and bottom of the graphite tube with two graphite sheets with the same diameter as the outer diameter of the graphite tube. Set two conductive steel rings at the end; ...

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Abstract

The invention relates to a magnesium alloy for a magnesium secondary battery negative electrode material and a preparation method of the magnesium alloy. In the magnesium alloy for the magnesium secondary battery negative electrode material, the chemical formula of the constituent is Mg<-x>RE<-y>Zn<-z>As, wherein RE represents one or more of 17 rare-earth elements of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, the mass percents of all rare-earth elements are equal when various rare-earth elements exist, x, y and z are mass percents, x is more than or equal to 2% but less than or equal to 6%, y is more than or equal to 0.5% but less than or equal to 9%, and z is more than or equal to 0.5% but less than or equal to 2%. The preparation method of the magnesium alloy mainly comprises the steps of pre-processing a surface of the magnesium rare-earth alloy, cutting the magnesium rare-earth alloy into two half cylinders, placing arsenic powder between the two half cylinders, wrapping with a tantalum thin film, and placing the product on a high-pressure machine for high-pressure smelting to obtain the magnesium rare-earth arsenic alloy. The method is simple and easy to control and is low in cost, environmental pollution is prevented, the prepared magnesium rare-earth arsenic alloy is used for the magnesium secondary battery negative electrode material, and the cycle performance of a magnesium secondary battery is improved.

Description

technical field [0001] The invention belongs to the field of material technology, and in particular relates to a battery negative electrode material and a preparation method thereof. Background technique [0002] With the increasing shortage of energy in all countries in the world, the increasing demand for energy, and the enhancement of people's awareness of environmental protection, the issue of seeking a new energy source is in front of us. This new energy must be a new battery product with no pollution, light weight, high energy, low price and strong adaptability. [0003] Generally speaking, the negative electrode of the battery is a metal alloy or an ionic compound of a metal. At present, the following metal alloys are widely used in the negative electrode of the battery: zinc, lead, cadmium, lithium, iron and other alloys. However, due to the needs of battery performance, heavy metals such as cadmium, lead, and mercury must be doped in the manufacturing process to m...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/42H01M4/46H01M4/62H01M10/054
CPCH01M4/364H01M4/42H01M4/466H01M4/628H01M10/054Y02E60/10
Inventor 赵翠玲彭秋明葛炳成孙勇
Owner YANSHAN UNIV
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