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Method for preparing hollow microporous carbon sphere coated nanometer sulfur molecular material

A molecular material, microporous carbon technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as limited energy density, inability to meet technological development, etc., to achieve simple equipment requirements, The method is simple and feasible, and the effect is conducive to the transmission of electrons

Inactive Publication Date: 2016-09-21
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the fields of electric vehicles, aerospace and national defense equipment, the current commercial lithium-ion secondary batteries are limited by the energy density, which is far from meeting the needs of technological development.

Method used

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  • Method for preparing hollow microporous carbon sphere coated nanometer sulfur molecular material
  • Method for preparing hollow microporous carbon sphere coated nanometer sulfur molecular material
  • Method for preparing hollow microporous carbon sphere coated nanometer sulfur molecular material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Preparation of hollow microporous carbon spheres: Dissolve 12mmol (3.46mL) tetrapropoxysilane (TPOS) in a solution consisting of 70mL ethanol, 10mL water and 3mL ammonia water, and stir for 15min. Then 0.4 g of resorcinol and 1 mL of formaldehyde were added, and the reaction was carried out for 24 hours with stirring.

[0027] After the reaction, centrifuge at 5000r / min for 10min, take the solid phase for washing and collect the solid.

[0028] Calcinate the collected solid at 700°C under argon, then mix it with 10% HF aqueous solution for corrosion reaction, remove the silicon dioxide in it, and finally centrifuge at 5000r / min for 10min, take the solid phase and wash it twice with water, then wash it with ethanol for 1 After drying at 60°C, the solid was collected to obtain hollow microporous carbon spheres.

[0029] 2) Preparation of hollow microporous carbon sphere-coated nano-sulfur molecular material: the prepared hollow microporous carbon sphere and sublimed s...

Embodiment 2

[0031] 1) Preparation of hollow microporous carbon spheres: Dissolve 60mmol (17.3ml) tetrapropoxysilane (TPOS) in a solution containing 350mL ethanol, 50mL water and 15mL ammonia water, and stir for 15min. Then 2.0 g of resorcinol and 5 mL of formaldehyde were added, and the reaction was carried out under stirring for 24 hours.

[0032] After the reaction, centrifuge at 5000r / min for 10min, take the solid phase for washing and collect the solid.

[0033] Calcinate the collected solid at 700°C under argon, then mix it with 10% HF aqueous solution for corrosion reaction, remove the silicon dioxide in it, and finally centrifuge at 5000r / min for 10min, take the solid phase and wash it twice with water, then wash it with ethanol for 1 After drying at 60°C, the solid was collected to obtain hollow microporous carbon spheres.

[0034] 2) Preparation of hollow microporous carbon sphere-coated nano-sulfur molecular material: the prepared hollow microporous carbon sphere and sublimed s...

Embodiment 3

[0036] 1) Preparation of hollow microporous carbon spheres: Dissolve 120mmol (34.6ml) tetrapropoxysilane (TPOS) in a solution containing 700mL ethanol, 500mL water and 30mL ammonia water, and stir for 15min. Then add 4.0% resorcinol and 10mL formaldehyde, and react under stirring condition for 24 hours.

[0037] After the reaction, centrifuge at 5000r / min for 10min, take the solid phase for washing and collect the solid.

[0038] Calcinate the collected solid at 700°C under argon, then mix it with 10% HF aqueous solution for corrosion reaction, remove the silicon dioxide in it, and finally centrifuge at 5000r / min for 10min, take the solid phase and wash it twice with water, then wash it with ethanol for 1 After drying at 60°C, the solid was collected to obtain hollow microporous carbon spheres.

[0039] 2) Preparation of hollow microporous carbon sphere-coated nano-sulfur molecular material: the prepared hollow microporous carbon sphere and sublimed sulfur were ground and mix...

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Abstract

The invention discloses a method for preparing a hollow microporous carbon sphere coated nanometer sulfur molecular material, and belongs to the field of the chemical battery. The method comprises the steps of dissolving TPOS into a solution containing ethyl alcohol, water and ammonia water; then adding resorcinol and formaldehyde; carrying out centrifuging, washing, and calcining under argon after the reaction is finished; then mixing with an HF water solution to perform a corrosion reaction to obtain hollow microporous carbon spheres; and enabling the hollow microporous carbon spheres to be reacted with sublimed sulfur in a grinding and mixing manner to obtain the hollow microporous carbon sphere coated nanometer sulfur molecular material. The hollow microporous carbon sphere coated nanometer sulfur molecular material prepared by the invention is uniform in appearance, and relatively high in specific surface area and large-pore volume, so that the material can contain relatively high sulfur content; and therefore, electron transport can be facilitated, and an effect of improving the coulombic efficiency and the cycling stability of the battery can be achieved.

Description

technical field [0001] The invention belongs to the field of chemical batteries, and in particular relates to a method for preparing hollow microporous carbon sphere-coated nanometer sulfur molecule materials. Background technique [0002] With the increasing depletion of fossil fuels and the increasingly serious environmental problems caused by their combustion, it is urgent to find new energy sources. At the same time, the rapid development of portable devices such as mobile phones, notebook computers, digital cameras, and electric vehicles, and the Secondary batteries have been widely used. Among them, lithium-ion secondary batteries, which appeared in the 1990s, are currently recognized as a new generation of chemical power sources in the world. They have been successfully commercialized and developed rapidly in the field of portable devices. However, in the fields of electric vehicles, aerospace and national defense equipment, the current commercial lithium-ion seconda...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/583H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/38H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 刁国旺赵钢筋倪鲁彬吴震孙春雨李欢梁大帅王伟廖芸芸
Owner YANGZHOU UNIV
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