One-dimensional nitrogen-doped carbon vesicle, battery positive electrode material and synthesis method thereof

A nitrogen-doped carbon, synthesis method technology, applied in battery electrodes, hybrid capacitor electrodes, nanotechnology for materials and surface science, etc., can solve the problems of complex synthesis methods, low synthesis yields, etc. The effect of high nitrogen content and high specific surface area

Active Publication Date: 2021-02-02
BAOWU CHARCOAL MATERIAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned synthesis routes either have the problem of low synthesis yield, or the problem of too complicated synthesis method, and the one-dimensional nanostructures produced by the above-mentioned synthesis are limited to binary metal oxides.

Method used

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  • One-dimensional nitrogen-doped carbon vesicle, battery positive electrode material and synthesis method thereof
  • One-dimensional nitrogen-doped carbon vesicle, battery positive electrode material and synthesis method thereof
  • One-dimensional nitrogen-doped carbon vesicle, battery positive electrode material and synthesis method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] In Example 1, the synthesis method of one-dimensional nitrogen-doped carbon vesicles adopts the following steps:

[0034] Grind and mix 0.2g cyanamide and 1g mesoporous silica template;

[0035] Put the ground and mixed powder into N 2 In a tubular furnace with atmosphere, heat up to 800°C at 5°C / min for 2 hours;

[0036] After completion, cool down to room temperature and take it out, and use 1M NaOH to stir at 80°C for 12 hours to remove the mesoporous silica template to obtain one-dimensional nitrogen-doped carbon vesicles.

[0037] figure 1 A transmission electron microscope image at a resolution of 0.5 μm of the mesoporous silica template used in the one-dimensional nitrogen-doped carbon vesicle of Example 1 is shown. figure 2 The transmission electron microscope image of the mesoporous silica template used in the one-dimensional nitrogen-doped carbon vesicle of Example 1 at a resolution of 200 nm is shown.

[0038] like figure 1 and figure 2 As shown, the ...

Embodiment 2

[0041] In Example 2, the synthesis method of one-dimensional nitrogen-doped carbon vesicles adopts the following steps:

[0042] Grind and mix 0.2g dicyandiamide and 1g mesoporous silica template;

[0043] Put the ground and mixed powder into H 2 In a tube furnace with atmosphere, heat up to 700°C at 5°C / min for 6 hours;

[0044] After completion, cool down to room temperature and take it out, and use 1M NaOH to stir at 80°C for 12 hours to remove the mesoporous silica template to obtain one-dimensional nitrogen-doped carbon vesicles.

[0045] Figure 4 It is a transmission electron microscope image of the one-dimensional nitrogen-doped carbon vesicle of Example 2 at a resolution of 0.5 μm.

[0046] like Figure 4 As shown, the mesoporous silica template used in Example 2 is a one-dimensional mesoporous nanorod, and the obtained one-dimensional nitrogen-doped carbon vesicle has a hollow core-shell structure inside, and the core-shell structure is rod-shaped , In addition,...

Embodiment 3

[0052] In Example 3, the synthesis method of one-dimensional nitrogen-doped carbon vesicles adopts the following steps:

[0053] Grind and mix 0.2g cyanamide and 1g mesoporous silica template;

[0054] Put the ground and mixed powder into H 2 -In a tube furnace with an Ar atmosphere, heat up to 700°C at 10°C / min and hold for 2 hours;

[0055] After completion, cool down to room temperature and take it out, and use 1M NaOH to stir at 80°C for 12 hours to remove the mesoporous silica template to obtain one-dimensional nitrogen-doped carbon vesicles.

[0056] The one-dimensional nitrogen-doped carbon vesicle of Example 3 has a hollow core-shell structure inside, the core-shell structure is rod-shaped, and its nitrogen content is 5.6wt%, and the specific surface area of ​​the core-shell structure is 246 cm 3 / g.

[0057] The one-dimensional nitrogen-doped carbon vesicles of Example 3 are used as the sulfur-loaded positive electrode material for lithium-sulfur batteries, that is...

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Abstract

The invention discloses a one-dimensional nitrogen-doped carbon vesicle which is of a core-shell structure with a cavity inside, the core-shell structure is rod-shaped, and the nitrogen content of theone-dimensional nitrogen-doped carbon vesicle is 1-10wt%. In addition, the invention further discloses a battery positive electrode material which comprises the one-dimensional nitrogen-doped carbonvesicle, and the cavity of the core-shell structure is filled with the positive electrode material. In addition, the invention also discloses a synthesis method of the one-dimensional nitrogen-doped carbon vesicle. The synthesis method comprises the following steps: grinding and mixing a mesoporous silica template and a carbon-nitrogen organic matter; placing the ground and mixed powder in a protective atmosphere to be heated; and stirring with alkali liquor to remove the mesoporous silica template to obtain the one-dimensional nitrogen-doped carbon vesicle. The one-dimensional nitrogen-dopedcarbon vesicle has relatively high conductivity, high nitrogen content and high specific surface area so that the one-dimensional nitrogen-doped carbon vesicle has an excellent application prospect inthe fields of energy storage, catalysis and medicines.

Description

technical field [0001] The invention relates to a nanometer material and a synthesis method thereof, in particular to a nanometer carbon material and a synthesis method thereof. Background technique [0002] Carbon nanomaterials refer to carbon materials with at least one dimension of the dispersed phase smaller than 100nm. It can be composed of carbon atoms or heteroatoms (non-carbon atoms), and it can even be nanopores. One-dimensional carbon nanomaterials have many excellent physical and chemical properties due to their unique structural features, and are widely used in many fields, such as catalysis, biomedicine, and energy conversion / storage, and have received more and more attention for this reason. Considering that as energy conversion / storage materials, 1D nanocarbon materials not only facilitate ion diffusion and electron transport, but also effectively accommodate volume expansion during charge / discharge cycles, achieving high reversible capacities with fast charg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15H01G11/32H01M4/62B82Y30/00B82Y40/00
CPCC01B32/15H01M4/625H01G11/32B82Y30/00B82Y40/00Y02E60/10
Inventor 谭迎宾李铮铮徐丽敏杨兵
Owner BAOWU CHARCOAL MATERIAL TECH CO LTD
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