Preparation method of 3D (three-dimensional) porous nitrogen-sulfur doped anode carbon material based on short rod construction

A three-dimensional porous, carbon material technology, applied in the preparation/purification of carbon, battery electrodes, structural parts, etc., to achieve the effect of simple experimental operation and low cost

Inactive Publication Date: 2018-11-16
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although two-dimensional doped graphene can significantly increase the specific capacity of the material as an electrode material, there is still a lot of room for improvement in terms of kinetics.

Method used

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  • Preparation method of 3D (three-dimensional) porous nitrogen-sulfur doped anode carbon material based on short rod construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Dissolve 40mg of graphene oxide in 10ml of deionized water, ultrasonically disperse, then add 126mg of melamine, stir evenly, and record it as liquid A.

[0018] (2) Dissolve thiocyanuric acid in 25ml of dimethyl sulfoxide to prepare a solution with a concentration of 7.08 mg / ml, which is recorded as solution B.

[0019] (3) Slowly pour liquid B into liquid A and stir at 60°C for 2 hours.

[0020] (4) The prepared sample was dried by vacuum drying method, and then heated to 550°C at a heating rate of 2°C / min under the protection of argon atmosphere and kept for 5h. That is, a three-dimensional porous nitrogen-sulfur-doped carbon material constructed by short rods is obtained.

Embodiment 2

[0022] (1) Dissolve 50mg of graphene oxide in 10ml of deionized water, ultrasonically disperse, then add 126mg of melamine, stir evenly, and record it as liquid A.

[0023] (2) Dissolve thiocyanic acid in 25ml of ethanol to prepare a solution with a concentration of 10.62 mg / ml, which is recorded as solution B.

[0024] (3) Slowly pour liquid B into liquid A and stir at 70°C for 5 hours.

[0025] (4) The prepared sample was dried by vacuum drying method, and then heated to 750°C at a heating rate of 5°C / min under the protection of argon atmosphere and kept for 1h. That is, a three-dimensional porous nitrogen-sulfur-doped carbon material constructed by short rods is obtained.

Embodiment 3

[0027] (1) Dissolve 80mg of graphene oxide in 20ml of deionized water, ultrasonically disperse, then add 63mg of melamine, stir evenly, and record it as liquid A.

[0028] (2) Dissolve thiocyanuric acid in 20ml of nitrogen-methylpyrrolidone to prepare a solution with a concentration of 14.16 mg / ml, which is recorded as solution B.

[0029] (3) Slowly pour liquid B into liquid A and stir at 70°C for 5 hours.

[0030] (4) The prepared samples were dried by freeze-drying, and then heated to 850°C at a heating rate of 10°C / min under the protection of an argon atmosphere and kept for 2 hours. That is, a three-dimensional porous nitrogen-sulfur-doped carbon material constructed by short rods is obtained.

[0031] Refer to attached figure 1 , figure 1 SEM photographs of samples prepared for this example. Using the S-4800 scanning electron microscope (SEM) of Japan Electronics Corporation to observe the morphology, it can be clearly seen that the three-dimensional porous nitrogen-...

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Abstract

The invention discloses a 3D (three-dimensional) porous nitrogen-sulfur doped anode carbon material based on short rod construction. The material is prepared with a method comprising steps as follows:a uniform solution containing trithiocyanuric acid is slowly added to an aqueous graphene oxide solution containing dissolved melamine, and a mixed solution is sufficiently stirred at 50-120 DEG C; aproduct is calcined in inert atmosphere at 550-1150 DEG C, and the 3D porous nitrogen-sulfur doped anode carbon material based on the short rod construction is obtained. The 3D porous nitrogen-sulfurdoped anode carbon material based on the short rod construction has a short rod-like porous shell structure and comprises a framework formed by polymerization of melamine and trithiocyanuric acid supermolecules, a 3D structure formed by the framework and graphene and a doping structure of nitrogen-sulfur atoms in graphene. The carbon material as an anode of a lithium battery and a sodium batteryhas good rate capability, and by means of the larger specific surface area and hierarchical porous structure, sulfur loading is easy to realize. The preparation method is simple to operate and low incost, and large-scale preparation can be realized.

Description

technical field [0001] The invention belongs to the technical field of nano-carbon electrode materials, and in particular relates to a method for preparing a three-dimensional porous nitrogen-sulfur-doped carbon material constructed by short rods. Background technique [0002] As we all know, graphene is a two-dimensional crystal with a perfect structure of one atomic layer thickness composed of carbon atoms. However, graphene's lack of inherent band gap and its easy restacking in experiments limit its practical application in various fields. Studies have shown that heteroatom doping can effectively open the band gap of graphene, resulting in significantly improved physical, chemical and electrical properties. In addition, three-dimensional regulation of the graphene structure can solve the problem of its easy stacking. Common methods of doping graphene include CVD, ball milling, plasma, arc discharge, wet chemical and heat treatment. In contrast, the wet chemical method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05H01M4/36H01M4/38H01M4/62
CPCC01B32/05H01M4/364H01M4/38H01M4/625Y02E60/10
Inventor 黄剑锋席乔李嘉胤曹丽云王天仵婉晨徐培光郭鹏辉
Owner SHAANXI UNIV OF SCI & TECH
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