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Boron-sulfur co-doped carbon nanotube as well as preparation method and application thereof

A carbon nanotube and co-doping technology is applied in the direction of active material electrodes, structural parts, electrical components, etc., to achieve the effects of low cost, simple process and good wettability

Pending Publication Date: 2021-06-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing boron-sulfur co-doped carbon nanotubes for the problem that there are many defects in the preparation method of boron / sulfur co-doped carbon nanotubes in the prior art

Method used

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  • Boron-sulfur co-doped carbon nanotube as well as preparation method and application thereof
  • Boron-sulfur co-doped carbon nanotube as well as preparation method and application thereof
  • Boron-sulfur co-doped carbon nanotube as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) Place the dry 45mL polytetrafluoroethylene reaction kettle on a horizontal table, drop 0.4ml of nitric acid with a concentration of 65%-68%, and then put it into a quartz glass test tube with a through hole smoothly, and then place it in the quartz test tube Evenly cover 0.4g of pure carbon nanotubes inside, transfer the sealed polytetrafluoroethylene reaction kettle with stainless steel sleeve to an oven, set the temperature at 200°C, keep it warm for 5 hours, cool it to room temperature naturally, wash the product with distilled water to Neutral, dry at 60°C for 12 hours before use.

[0040] (2) Mix the sulfur source and boron source according to the molar ratio of sulfur and boron at 1:1 as a dopant, add it to a beaker filled with 30mL distilled water, and heat it in a water bath at 30°C for 5min to completely dissolve the dopant.

[0041] (3) Weigh the product obtained in (1) and the product obtained in (2) according to a mass ratio of 1:5 and weigh an appropria...

Embodiment 2

[0045] (1) Place the dry 45mL polytetrafluoroethylene reaction kettle on a horizontal table, drop 0.4ml of nitric acid with a concentration of 65%-68%, and then put it into a quartz glass test tube with a through hole smoothly, and then place it in the quartz test tube Evenly cover 0.4g of pure carbon nanotubes inside, transfer the sealed polytetrafluoroethylene reaction kettle with stainless steel sleeve to an oven, set the temperature at 200°C, keep it warm for 5 hours, cool it to room temperature naturally, wash the product with distilled water to Neutral, dry at 60°C for 12 hours before use.

[0046] (2) Mix the sulfur source and boron source according to the molar ratio of sulfur and boron to 2:1 and use it as a dopant, add it to a beaker filled with 30mL distilled water, and heat it in a water bath at 30°C for 5min to completely dissolve the dopant.

[0047] (3) Weigh the product obtained in (1) and the product obtained in (2) according to a mass ratio of 1:5 and weigh a...

Embodiment 3

[0051] (1) Place the dry 45mL polytetrafluoroethylene reaction kettle on a horizontal table, drop 0.4ml of nitric acid with a concentration of 65%-68%, and then put it into a quartz glass test tube with a through hole smoothly, and then place it in the quartz test tube Evenly cover 0.4g of pure carbon nanotubes inside, transfer the sealed polytetrafluoroethylene reaction kettle with stainless steel sleeve to an oven, set the temperature at 200°C, keep it warm for 5 hours, cool it to room temperature naturally, wash the product with distilled water to Neutral, dry at 60°C for 12 hours before use.

[0052] (2) Mix the sulfur source and boron source according to the molar ratio of sulfur and boron to 5:1 and use it as a dopant, add it to a beaker filled with 30mL distilled water, and heat it in a water bath at 30°C for 5min to completely dissolve the dopant.

[0053] (3) Weigh the product obtained in (1) and the product obtained in (2) according to a mass ratio of 1:5 and weigh a...

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Abstract

The invention discloses a boron-sulfur co-doped carbon nanotube and a preparation method and application thereof, and the preparation method comprises the following steps: step 1, carrying out oxidation etching on a carbon nanotube by using nitric acid steam to obtain an etched carbon nanotube; step 2, mixing a sulfur source and a boron source to serve as a dopant, adding the mixture into distilled water, and heating to completely dissolve the dopant to obtain a dopant solution; and step 3, uniformly mixing and dispersing the etched carbon nanotubes and the dopant solution, preserving heat at 160-200 DEG C for 12-24 hours, cooling to room temperature, removing supernatant, washing precipitates by using deionized water, centrifugally separating, and drying to obtain the boron-sulfur co-doped carbon nanotubes. According to the invention, effective doping of boron and sulfur can be realized, and the electrochemical performance of the carbon nanotube is improved.

Description

technical field [0001] The invention relates to the technical field of carbon nanotube materials, in particular to a boron-sulfur co-doped carbon nanotube and its preparation method and application. Background technique [0002] With the development of science and technology and the progress of society, the demand for high energy density batteries is increasing. At present, the development of commercial lithium-ion batteries has encountered a bottleneck, and how to prepare high-performance battery anode materials is one of the problems. Carbon nanotubes are one of the most studied negative electrode materials. It has excellent mechanical properties, unique tubular structure, large aspect ratio and specific surface area, and can provide a large number of active sites. However, carbon nanotube negative electrode materials The poor conductivity and cycle performance, low Coulombic efficiency, and low capacity make it difficult to be widely used. [0003] Heteroatom doping of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/587H01M10/0525
CPCH01M4/587H01M10/0525H01M2004/027Y02E60/10
Inventor 侯峰陈国院
Owner TIANJIN UNIV