In-situ nitrogen-doped hollow carbon ball and preparation method thereof and preparation method and application of electrode material

A technology of hollow carbon spheres and nitrogen doping, applied in battery electrodes, circuits, nanocarbons, etc., can solve the problems of wasting solvents and carbon sources, hindering industrial scale, and limiting practical applications, etc., and achieves small nanoscale and low price , Realize the effect of low-cost large-scale industrial production

Inactive Publication Date: 2019-04-16
YANSHAN UNIV
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  • Description
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Problems solved by technology

However, the process of this method is relatively complicated, and a large amount of solvent and carbon source will be wasted, which will greatly increase the cost, thus hindering its industrial scale and greatly limiting its practical application.
However, there are few reports on in situ nitrogen-doped hollow carbon nanospheres self-templated by tetraethyl silicate, and it is still a challenge to solve this problem.

Method used

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  • In-situ nitrogen-doped hollow carbon ball and preparation method thereof and preparation method and application of electrode material
  • In-situ nitrogen-doped hollow carbon ball and preparation method thereof and preparation method and application of electrode material
  • In-situ nitrogen-doped hollow carbon ball and preparation method thereof and preparation method and application of electrode material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Weigh 0.05g of ammonia water, add 0.5g of ethanol and 5g of water into the mixture of water and sonicate for 10 minutes; then add 5g of formaldehyde solution and 0.033g of paracetamol (or o-acetaminophen, p-aminophenol and m-aminophenol, etc.);

[0049] Then, 0.01 g of tetrapropyl orthosilicate (TPOS) or tetraethylsilicate (TEOS) was added to the above solution, and the solution was heated to 80° C. and kept for 100 h. Filter while hot, wash with water, and dry to obtain SiO coated with phenolic resin. 2 The microspheres were placed in a tube furnace and heated at 500 °C for 100 h under an argon atmosphere. Finally, soak the obtained sample in dilute sodium hydroxide solution for 1 hour, filter, wash with water, and dry to obtain in-situ nitrogen-doped hollow carbon spheres.

[0050] Grind the obtained in-situ nitrogen-doped hollow carbon spheres into powder, prepare materials according to the mass ratio of in-situ nitrogen-doped hollow carbon sphere powder: acetylene ...

Embodiment 2

[0053] Weigh 5g of ammonia water and add it to the mixture of 5g ethanol and 5g water and sonicate for 10 minutes; then add 8.2g formaldehyde solution and 4.5g p-aminophenol respectively. Then, 88 g of tetraethyl silicate (TEOS) was added to the above solution, and the solution was heated to 80° C. and kept for 6 h. Filter while hot, wash with water, and dry to obtain SiO coated with phenolic resin. 2 The microspheres were placed in a tube furnace and heated at 1100 °C for 3 h under an argon atmosphere. Finally, soak the obtained sample in dilute sodium hydroxide solution for 48 hours, filter, wash with water, and dry to obtain in-situ nitrogen-doped hollow carbon spheres.

[0054] Grind the obtained in-situ nitrogen-doped hollow carbon spheres into powder, prepare materials according to the mass ratio of in-situ nitrogen-doped hollow carbon sphere powder: acetylene black: PVDF is 80:10:10, place them in a mortar and add NMP, Grind to a uniform paste; and control the thickne...

Embodiment 3

[0057] Weigh 32g of ammonia water and add 1.6g of ethanol and 0.32g of water into a mixture of 1.6g of ethanol and 0.32g of water to sonicate for 10 minutes; then add 5g of formaldehyde solution and 19g of o-acetaminophen respectively. Then 12 g of tetrapropyl orthosilicate (TPOS) was added to the above solution, and the solution was heated to 80° C. and kept for 17 hours. Filter while hot, wash with water, and dry to obtain SiO coated with phenolic resin. 2 The microspheres were placed in a tube furnace and heated at 900 °C for 6 h under an argon atmosphere. Finally, soak the obtained sample in dilute sodium hydroxide solution for 24 hours, filter, wash with water, and dry to obtain in-situ nitrogen-doped hollow carbon spheres.

[0058] Grind the obtained in-situ nitrogen-doped hollow carbon spheres into powder, prepare materials according to the mass ratio of in-situ nitrogen-doped hollow carbon sphere powder: acetylene black: PVDF is 80:10:10, place them in a mortar and ad...

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Abstract

The invention provides an in-situ nitrogen-doped hollow carbon ball and a preparation method thereof and a preparation method and application of an electrode material and relates to the technical field of electrochemistry energy materials. According to the in-situ nitrogen-doped hollow carbon ball, the SiO2 ball is used as a rigid membrane plate, formaldehyde is used as a carbon source, and one ormore of p-acetamidophenol, 2-acetamidophenol, p-aminophenol and m-aminophenol are used as a nitrogen source; the rigid membrane plate, the carbon source and the nitrogen source are placed in a reaction system of ethyl alcohol, water and ammonium hydroxide; through a sol-gel process, the SiO2 ball is wrapped by phenolic resin prepared through an aldol condensation reaction, the SiO2 / phenolic resinball with a core-shell structure is prepared, and the nitrogen-doped hollow carbon ball is obtained through carbonization and silicon removal. The prepared nitrogen-doped hollow carbon ball has the advantages of being small in nanoscale, even in shape, high in specific surface area and the like and has wide application prospects in the aspects such as energy storage, catalysis and adsorption.

Description

technical field [0001] The invention relates to the technical field of electrochemical energy materials, in particular to an in-situ nitrogen-doped hollow carbon sphere, a preparation method thereof, an electrode material preparation method and its application. Background technique [0002] The storage and conversion of energy has become an important issue restricting the sustainable development of the world economy. Secondary alkali metal ions (Li + , Na + ,K + etc.) The battery has the advantages of high specific energy, long cycle life, no memory effect, high working voltage, small self-discharge and environmental friendliness; it is widely used in various fields such as portable electronics, aerospace and electric vehicles. However, rechargeable metal-ion batteries are insufficient to meet the growing demand for lithium-ion batteries due to their low power density. With the development of science and technology, the requirements for the performance of metal ion batte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15H01M4/583H01M10/05
CPCC01B32/15H01M4/583H01M10/05Y02E60/10
Inventor 赵玉峰黄士飞
Owner YANSHAN UNIV
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