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Carbon nanotube-in-tube@antimony sulfide/antimony composite material and preparation method and application thereof

A technology of carbon nanotubes and composite materials, applied in the field of lithium-ion batteries, can solve problems such as damage reaction kinetics, achieve the effects of suppressing losses, maintaining integrity, and improving rate performance

Inactive Publication Date: 2021-11-16
HANGZHOU VOCATIONAL & TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For common Sb 2 S 3 For the composite structure of carbon materials such as graphene and carbon fiber, Sb 2 S 3 Easily detached from the carbon substrate, or the tightly packed environment completely prevents the Sb 2 S 3 contact with electrolyte, impairing reaction kinetics

Method used

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  • Carbon nanotube-in-tube@antimony sulfide/antimony composite material and preparation method and application thereof
  • Carbon nanotube-in-tube@antimony sulfide/antimony composite material and preparation method and application thereof
  • Carbon nanotube-in-tube@antimony sulfide/antimony composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Preparation of solution A: ultrasonically disperse 28 mg of acidified carbon nanotubes (CNTs) with an outer diameter of 30-60 nm in 5 ml of methanol. Preparation solution B: 0.8g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 14ml methanol. Preparation solution C: 2.17 g of 2-methylimidazole was dissolved in 14 ml of methanol. Pour solution B into solution C quickly under stirring conditions to form a uniform precursor solution, and then pour it into solution A after a few minutes. Then, the obtained homogeneous solution was transferred to a polytetrafluoroethylene-lined stainless steel autoclave, and the autoclave was placed in an oven at 90°C for 6 h, and then naturally cooled to room temperature in the oven. The product was separated by centrifugation, washed several times with methanol, and dried at 60°C to obtain CNTs@ZIF-8.

[0043] (2) Ultrasonic dispersion of 100mg CNTs@ZIF-8 in 10ml ethanol. 230 mg of cetyltrimethylammonium bromide (CTAB) was dissolved in 30 ml...

Embodiment 2

[0051] (1) Preparation of solution A: ultrasonically disperse 28 mg of acidified carbon nanotubes (CNTs) with an outer diameter of 30-60 nm in 5 ml of methanol. Preparation solution B: 0.8g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 14ml methanol. Preparation solution C: 2.17 g of 2-methylimidazole was dissolved in 14 ml of methanol. Pour solution B into solution C quickly under stirring conditions to form a uniform precursor solution, and then pour it into solution A after a few minutes. Then, the obtained homogeneous solution was transferred to a polytetrafluoroethylene-lined stainless steel autoclave, and the autoclave was placed in an oven at 110° C. for 6 h, and then naturally cooled to room temperature in the oven. The product was separated by centrifugation, washed several times with methanol, and dried at 60°C to obtain CNTs@ZIF-8.

[0052] Subsequent process is identical with embodiment 1.

[0053] The structure of the product carbon nanotube middle tube@antimony sulf...

Embodiment 3

[0056] (1) Preparation of solution A: ultrasonically disperse 28 mg of acidified carbon nanotubes (CNTs) with an outer diameter of 30-60 nm in 5 ml of methanol. Preparation solution B: 0.8g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 14ml methanol. Preparation solution C: 2.17 g of 2-methylimidazole was dissolved in 14 ml of methanol. Pour solution B into solution C quickly under stirring conditions to form a uniform precursor solution, and then pour it into solution A after a few minutes. Then, the obtained homogeneous solution was transferred to a polytetrafluoroethylene-lined stainless steel autoclave, and the autoclave was placed in an oven at 90°C for 6 h, and then naturally cooled to room temperature in the oven. The product was separated by centrifugation, washed several times with methanol, and dried at 60°C to obtain CNTs@ZIF-8.

[0057] (2) Ultrasonic dispersion of 100mg CNTs@ZIF-8 in 10ml ethanol. 340 mg of cetyltrimethylammonium bromide (CTAB) was dissolved in 30 ml...

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Abstract

The invention discloses a carbon nanotube-in-tube@antimony sulfide / antimony composite material, a preparation method thereof and application in preparation of a negative electrode of a lithium ion battery. In the carbon nanotube-in-tube@antimony sulfide / antimony composite material, the carbon nanotube-in-tube is of a tube-in-tube structure which takes a carbon nano tube as an inner tube and an amorphous carbon nano tube as an outer tube, and the antimony sulfide / antimony is a mixture of antimony sulfide and metal antimony formed by reducing the antimony sulfide, and is tightly fixed in the carbon nanotube middle tube. The preparation method comprises the following steps: growing ZIF-8 particles on the surface of the carbon nanotube, then coating the surface of the carbon nanotube with a layer of RF resin, performing vulcanization treatment and ion exchange, and finally performing carbonization and calcination to obtain a final product. The conductivity and the structural stability of antimony sulfide can be improved, and the rate capability, the cycle performance and the reversible capacity of antimony sulfide can be improved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a carbon nanotube tube@antimony sulfide (Sb 2 S 3 ) / antimony (Sb) composite material and its preparation method and application. Background technique [0002] The rapid development of electric vehicles and portable electronic devices has inspired the ever-increasing performance requirements for lithium-ion batteries, such as higher specific capacity, higher energy and power density. Due to the low theoretical specific capacity and poor rate performance of the current commercial graphite anode, the further improvement of the performance of lithium-ion batteries is seriously restricted. Therefore, it is urgent to develop new anode materials to overcome the shortcomings of graphite and promote the further development of lithium-ion batteries. Sb 2 S 3 Non-toxic, low cost, high theoretical specific capacity (about 947mAh g -1 ) and other advantages, it is consider...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525C01B32/168C01G30/00
CPCH01M4/362H01M4/364H01M4/5815H01M4/625H01M4/628H01M10/0525C01B32/168C01G30/008C01P2004/03C01P2004/04C01P2004/64C01P2004/62H01M2004/021H01M2004/027Y02E60/10
Inventor 杨秋合袁永锋
Owner HANGZHOU VOCATIONAL & TECHN COLLEGE
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