Doped porous carbon spheres used for negative electrode material of sodium ion battery and preparation method for doped porous carbon spheres

A sodium-ion battery and negative electrode material technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of no element-doped modified porous carbon sphere research reports, difficult industrial application, complex preparation process, etc. Achieve the effects of easy industrial scale application, low cost and simple preparation method

Inactive Publication Date: 2016-09-07
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the complex preparation process and high cost of the above-mentioned doped carbon materials, it is difficult to realize industrial application.
As an ideal anode material for sodium-ion batteries, carbon spheres have not yet been reported on element-doped modified porous carbon spheres.

Method used

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  • Doped porous carbon spheres used for negative electrode material of sodium ion battery and preparation method for doped porous carbon spheres
  • Doped porous carbon spheres used for negative electrode material of sodium ion battery and preparation method for doped porous carbon spheres
  • Doped porous carbon spheres used for negative electrode material of sodium ion battery and preparation method for doped porous carbon spheres

Examples

Experimental program
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Embodiment 1

[0030] Dissolve 1.36g of sucrose and 0.4g of concentrated sulfuric acid in 20ml of a mixed solvent consisting of water and ethylene glycol (volume ratio 6:4). Then, put the solution in a 35ml microwave tube and put it into a microwave reaction synthesizer, set the maximum power to 100W, and react at 160°C for 10 minutes to obtain precursor carbon spheres. Put the precursor carbon spheres into a tube furnace, heat-treat at 500°C for 2 hours in a nitrogen atmosphere, then heat-treat at 900°C for 30 minutes in an ammonia atmosphere, turn off the ammonia gas, replace the carbon dioxide, and treat at 900°C for 30 minutes. Nitrogen-doped porous carbon spheres were obtained.

[0031] figure 1 Scanning electron micrographs of the as-prepared nitrogen-doped porous carbon spheres. from figure 1 It can be seen that the prepared nitrogen-doped porous carbon spheres are spherical with an average diameter of about 1 μm. figure 2 The X-ray diffraction pattern of nitrogen-doped porous ca...

Embodiment 2

[0035]Dissolve 0.68g of sucrose and 0.4g of concentrated sulfuric acid in 20ml of a mixed solvent consisting of water and ethylene glycol (volume ratio 6:4). Then, put the solution in a 35ml microwave tube and put it into a microwave reaction synthesizer, set the maximum power to 100W, and react at 160°C for 10 minutes to obtain precursor carbon spheres. Precursor carbon spheres and ammonium fluoride with a mass ratio of 1:1 are fully mixed and placed in a tube furnace. First, heat treatment at 600°C for 2 hours in a nitrogen atmosphere, and then 30 minutes in a carbon dioxide atmosphere to obtain fluorine-nitrogen co-doping porous carbon spheres. The method described in Example 1 was used to test the electrochemical performance of the fluorine and nitrogen co-doped porous carbon spheres as negative electrode materials for sodium ion batteries. The relevant properties and electrochemical performance of the fluorine and nitrogen co-doped porous carbon spheres are shown in Tabl...

Embodiment 3

[0037] Dissolve 3.6g of glucose and 1g of boric acid in 40ml of water, put them into a 100ml hydrothermal reactor, and react at 160°C for 3.5h to obtain precursor carbon spheres. The precursor carbon spheres and zinc chloride were mixed at a mass ratio of 1:1, put into a tube furnace, and heat-treated at 1600 °C for 1 hour under an argon atmosphere to obtain boron-doped porous carbon spheres. Its scanning electron microscope pictures are as Image 6 As shown, it can be seen that the obtained doped porous carbon spheres have an average diameter of about 200 nm. The method described in Example 1 was used to test the electrochemical performance of the doped porous carbon spheres as negative electrode materials for sodium ion batteries. The relevant properties and electrochemical performance of the boron-doped porous carbon spheres are shown in Table 1.

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Abstract

The invention discloses doped porous carbon spheres used for a negative electrode material of a sodium ion battery. At least one kind of non-metallic elements of N, B, P, S, F, Cl or Br is doped in the porous carbon spheres; and the doping amount of the non-metallic element is 0.5%-15% based on atomic ratio. When the doped porous carbon spheres prepared by the invention are used for the negative electrode material of the sodium ion battery, the advantages of high specific capacity, excellent cycling performance and excellent rate capability are represented. Meanwhile, the invention also provides a preparation method for the doped porous carbon spheres used for the negative electrode material of the sodium ion battery; and the preparation method is simple, the cost is low and industrial large-scale application is easy to achieve.

Description

technical field [0001] The invention relates to the technical field of negative electrode materials for sodium ion batteries, in particular to a doped porous carbon sphere used for negative electrode materials of sodium ion batteries and a preparation method thereof. Background technique [0002] With the development of human society, the sharp increase in demand for energy directly leads to the deterioration of the current ecological environment and the scarcity of various non-renewable resources. Therefore, the development of renewable and low-pollution new energy sources and the adjustment of energy structure are the only way for sustainable development in the future. Since available renewable new energy sources such as solar energy, geothermal energy, wind energy, and biomass energy are all intermittent, this prompts people to look for new energy storage and conversion systems. Electrochemical energy storage is considered to be one of the most promising energy storage m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/587H01M4/62H01M10/054
CPCH01M4/364H01M4/587H01M4/626H01M10/054Y02E60/10
Inventor 张孝杰潘丽坤陈泰强陆婷
Owner EAST CHINA NORMAL UNIV
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