Preparation method of nitrogen-doped hollow carbon sphere

A hollow carbon sphere, nitrogen doping technology, applied in nanotechnology for materials and surface science, electrical components, electrochemical generators, etc., can solve the problem that the capacity of graphite is difficult to meet the actual needs of use, and achieve a good cycle. Stability and rate capability, the effect of simple preparation process

Inactive Publication Date: 2018-11-02
FUZHOU UNIV
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Problems solved by technology

With the rapid development of electric vehicles and portable electronic products, the capacity of graphite is difficult to meet the needs of actual use.

Method used

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  • Preparation method of nitrogen-doped hollow carbon sphere
  • Preparation method of nitrogen-doped hollow carbon sphere
  • Preparation method of nitrogen-doped hollow carbon sphere

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Embodiment 1

[0013] A method for preparing nitrogen-doped hollow carbon spheres, wherein 0.1-2 grams of titanium sulfate are respectively dispersed in a sulfuric acid solution of 1-10 mol / liter, and then dropwise added containing 1-10 milliliters of butyl oleate and 1-10 grams of titanium sulfate. In the reaction kettle of milliliter oleylamine, after stirring for 30 minutes, in an oven at 100-200 ° C, react for 5-20 hours, after natural cooling, the obtained white precipitate is washed with deionized water for several times, and then centrifuged. After drying at 70 °C for 12 hours, and further calcining at 400-800 °C for 2-10 hours in an argon atmosphere, carbon-coated anatase-phase titanium dioxide mesogens (TiO2) can be obtained. 2 @C) Composite nanomaterials. Further with TiO 2 @C is the precursor, dissolved in HF acid solution to remove TiO 2 template. After centrifugation and washing, N-GC hollow carbon spheres were obtained by drying in air at 70°C for 12 hours.

[0014] The nit...

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Abstract

The invention belongs to the technical field of lithium-ion battery materials and particularly relates to a preparation method of nitrogen-doped hollow carbon spheres. The nitrogen-doped hollow carbonspheres are obtained by regarding carbon-coated titanium dioxide mesocrystal as a template, graphitizing a carbon layer at a high temperature and further dissolving the titanium dioxide at the interior by virtue of hydrofluoric acids. The preparation technology is simple and the prepared nitrogen-doped hollow carbon spheres have good cycling stability and rate capability.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery materials, and in particular relates to a preparation method of nitrogen-doped hollow carbon spheres. Background technique [0002] At present, the most commonly used negative electrode for lithium-ion batteries is graphite. Graphite has a lower theoretical specific capacity of 372 mAh / g. With the rapid development of electric vehicles and portable electronic products, the capacity of graphite is difficult to meet the actual needs. Therefore, the development of high-capacity lithium battery anode materials is particularly important. Nitrogen-doped carbon spheres have unique structural advantages, and their related research in lithium battery anode materials has received extensive attention. Due to the large specific surface area, the nitrogen-doped carbon material can fully contact the electrolyte and can bind more Li than the same amount of graphite. + ion. The well-developed por...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/485H01M4/625H01M10/0525Y02E60/10
Inventor 魏明灯张伟峰
Owner FUZHOU UNIV
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