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Antimony sulfide based negative electrode material with high reversible capacity and preparation and application thereof

An antimony sulfide-based, negative electrode material technology, applied in nanotechnology for materials and surface science, battery electrodes, electrochemical generators, etc., to achieve the effect of maintaining stability, uniform distribution, and improving cycle performance

Inactive Publication Date: 2017-11-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to reduce the powder size to 20μm and below, more than 50 hours of ball milling time are often required

Method used

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  • Antimony sulfide based negative electrode material with high reversible capacity and preparation and application thereof
  • Antimony sulfide based negative electrode material with high reversible capacity and preparation and application thereof
  • Antimony sulfide based negative electrode material with high reversible capacity and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Sb in this example 2 S 3 -The preparation method of Graphite composite material (being the antimony sulfide base negative electrode material with high reversible capacity), comprises the following steps:

[0044] Mix pure antimony sulfide and ordinary graphite powder, wherein the mass ratio of antimony sulfide powder and ordinary graphite powder is 4:1, add 2% absolute ethanol of the total mass of abrasive (pure antimony sulfide and ordinary graphite powder), use dielectric barrier Discharge plasma assisted high-energy ball milling, in which the mass ratio of balls to mixed powder (antimony sulfide powder and ordinary graphite powder) is 50:1, and the ball milling time is 3h; Sb 2 S 3 -Graphite composite material is antimony sulfide-based negative electrode material, and its powder size is less than 5 μm.

[0045] Wherein the specific steps of the dielectric barrier discharge plasma-assisted high-energy ball milling method are as follows:

[0046] (1) Load grinding ...

Embodiment 2

[0054] Sb in this example 2 S 3 -The preparation method of the Graphite-based composite material (that is, the antimony sulfide-based negative electrode material with high reversible capacity) is the same as in Example 1, except that the mass ratio of antimony sulfide powder and ordinary graphite powder is 1:1.

[0055] The antimony sulfide-based negative electrode material (Sb 2 S 3 -Graphite composite material) for lithium-ion batteries: the antimony sulfide-based negative electrode material (Sb 2 S 3 -Graphite composite material), conductive agent (sodium alginate) and binder (Super-P) are mixed and evenly coated on copper foil in a mass ratio of 8:1:1 to make electrode sheets, and dried in vacuum; In an argon atmosphere glove box, lithium metal was used as a counter electrode to assemble a button cell for testing. The test conditions are: the charge and discharge current density is 200mA / g, and the charge and discharge cut-off voltage is 0.01V~3.0V. The cycle perform...

Embodiment 3

[0058] Sb in this example 2 S 3 -The preparation method of the Graphite-based composite material (that is, an antimony sulfide-based negative electrode material with high reversible capacity) is the same as in Example 1, except that the mass ratio of antimony sulfide and graphite is 4:1, the frequency of the motor is 900rpm, and the ball mill The time is 6 hours, adding 2% absolute ethanol whose mass is the total mass of the abrasive.

[0059] Figure 6 It is the antimony sulfide-based negative electrode material (Sb 2 S 3 -Graphite composite) XRD patterns.

[0060] The antimony sulfide-based negative electrode material (Sb 2 S 3 -Graphite composite) backscattered SEM image see Figure 7 , as shown in the figure, the antimony sulfide powder is evenly distributed on the carbon matrix after ball milling, and there is no agglomeration phenomenon, which is conducive to giving full play to the high capacity of the antimony sulfide material.

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Abstract

The invention belongs to the technical field of battery materials, and discloses an antimony sulfide based negative electrode material with high reversible capacity and preparation and application thereof. The antimony sulfide based negative electrode material is Sb2S3-C composite powder materials, wherein the Sb2S3 is pure antimony sulfide powder and is major ingredients of powder materials, and accounts for 50 to 90 mass percent; C is graphite carbon materials, and accounts for 10 to 50 mass percent; the antimony sulfide powder and the graphite carbon materials are subjected to ball milling by a dielectric barrier discharging plasma auxiliary high-energy ball milling method. The material provided by the invention has good structure stability, long charging and discharging circulation life and relatively high reversible capacity. The method provided by the invention has the advantages that the structural stability and reversibility of the lithium (sodium) embedding-lithium (sodium) removal process of the antimony sulfide based negative electrode material and the conductive performance of the electrode material can be improved; meanwhile, the work energy efficiency is high; the antimony sulfide particles can be effectively refined; the electric performance of the materials can be improved; the mass production can be easily realized.

Description

technical field [0001] The invention belongs to the technical field of manufacturing lithium-ion batteries and sodium-ion batteries, and relates to a battery material that can be used to prepare lithium-ion batteries and sodium-ion batteries, in particular to a negative electrode material with high reversible capacity and a preparation method thereof. The material is used as an electrode material for lithium-ion batteries and sodium-ion batteries. Background technique [0002] The rapid change of wireless communication and the rapid development of industries such as new energy vehicles and large-scale energy storage have put forward higher requirements on the energy storage capacity, energy density, life, and safety of lithium-ion batteries. However, due to the defects of existing electrode materials in terms of quality and low volume-specific capacity, commercialized lithium-ion batteries cannot meet the application requirements in the above fields. Therefore, the improvem...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525H01M10/054B82Y30/00
CPCB82Y30/00H01M4/364H01M4/5815H01M4/625H01M4/628H01M10/0525H01M10/054Y02E60/10
Inventor 胡仁宗刘雨轩鲁忠臣曾美琴朱敏
Owner SOUTH CHINA UNIV OF TECH
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