Preparation method and application of high-capacity tin alloy sulfide negative electrode material suitable for industrialized mass production

A negative electrode material, tin alloy technology, applied in battery electrodes, electrical components, circuits, etc., can solve the problems of inability to produce lithium-ion battery capacity, increase the cost of battery use, and high price of cobalt elements, so as to improve negative electrode capacity and cycle Performance, increased capacity, and simple reaction conditions

Active Publication Date: 2013-11-06
ADVANCED ELECTRONICS ENERGY LIMITED GUANGDONG
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Problems solved by technology

[0007] However, when tin alloy is used as the lithium-ion negative electrode material, other metal atoms forming the alloy cannot form an alloy with lithium. Therefore, these metal atoms cannot generate lithium-ion battery capacity in the alloy negative electrode.
At the same time, the price of cobalt, which forms an alloy with tin, is relatively high, which increases the cost of the battery and limits the application and promotion of this high-capacity battery to a certain extent.

Method used

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  • Preparation method and application of high-capacity tin alloy sulfide negative electrode material suitable for industrialized mass production
  • Preparation method and application of high-capacity tin alloy sulfide negative electrode material suitable for industrialized mass production
  • Preparation method and application of high-capacity tin alloy sulfide negative electrode material suitable for industrialized mass production

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preparation example Construction

[0049] A preparation method suitable for industrialized mass production of a high-capacity tin alloy sulfide negative electrode material, comprising the following steps:

[0050] Mix tin (Sn) and other element (M) powders evenly, press into tablets, smelt in a vacuum high-frequency induction heating furnace to obtain a tin alloy ingot with uniform composition, crush the tin alloy ingot into tin alloy powder, and put it in a stirring ball mill Ball mill into amorphous tin alloy powder, then mix the tin alloy powder and sulfur source evenly, raise the temperature to 500 ~ 750 °C at a rate of 2 ~ 5 °C / min in a protective atmosphere or vacuum, and keep at this temperature for 0.5 ~ 2 hours, after the reaction, naturally cool to room temperature in a vacuum or protective gas atmosphere to obtain a high-capacity tin alloy sulfide anode material.

[0051] The other elements M are non-tin metal elements and / or non-metal elements. Preferably, the non-tin metal elements are cobalt (Co),...

Embodiment 1

[0062] Weigh tin powder and cobalt powder with a particle size of 200 mesh according to the mass percentage of 55:45, mix them evenly, press them into tablets, and then put them into the ZRS-0.1 vacuum melting casting belt furnace of Shanghai Mengting Instrument Equipment Co., Ltd., and vacuumize , through 99.9% argon protective gas, increase the current of the high-frequency induction coil to the eutectic melting of tin-cobalt alloy in the graphite crucible furnace, keep at this temperature for 60 seconds, so that the alloy is melted and mixed evenly, and then poured into the oxygen-free copper mold to quench and cool, and the Obtain silver-gray tin-cobalt alloy ingots. Break the tin-cobalt alloy ingot into small pieces, place it in a quartz test tube with a bottom diameter of 0.3 mm, and then place it in a high-frequency induction coil of a vacuum melting casting and casting belt furnace, and prepare a silver with a thickness of less than 10 microns by quenching an oxygen-fre...

Embodiment 2

[0064] The tin alloy reaction environment and conditions are the same as in Example 1.

[0065] The prepared alloy ingot was pulverized to below 200 mesh, placed in a stirring ball mill, and ball milled for 200 hours under the protection of argon to obtain black amorphous tin-cobalt alloy powder.

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Abstract

The invention discloses a preparation method for a high-capacity tin alloy sulfide negative electrode material suitable for industrialized mass production. The preparation method comprises the steps of smelting tin and other metals and nonmetals to obtain alloy uniform in ingredients, making alloy ingots into amorphous alloy powder, calcining the powder and a sulfur source, and obtaining the high-capacity tin alloy sulfide negative electrode material by preparation. The invention further discloses application of the high-capacity tin alloy sulfide negative electrode material in batteries. The preparation method is simple in reaction conditions, free of pollution, simple and convenient to operate, low in device requirements and good in product uniformity. The high-capacity tin alloy sulfide negative electrode material has extremely good gram volume and cycle performance in lithium-ion secondary batteries and is suitable for industrialized mass production.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and in particular relates to a preparation method and application of a high-capacity tin alloy sulfide negative electrode material suitable for industrialized mass production. Background technique [0002] Over the past 50 years, the use of petroleum resources has been increasingly depleted, resulting in the emission of a large amount of greenhouse gases and other toxic gases. Major countries in the world are seeking to replace the existing dwindling petroleum resources with clean energy. New energy vehicles powered by secondary batteries have received more and more attention. The miniaturization of various electronic products, such as smart phones, watches, and tablet computers, puts forward higher demands on battery energy density. Power batteries and energy storage batteries require higher mass and volumetric energy densities to meet the needs of these products. [0003] At present, lithiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58
CPCY02E60/12Y02E60/10
Inventor 徐士民马毅乔校畅熊红波付永丰陈光森
Owner ADVANCED ELECTRONICS ENERGY LIMITED GUANGDONG
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