Preparation method of improved type graded porous carbon-doped material

A technology of graded porous and carbon materials, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve problems such as difficult recycling, high consumption of deionized water, and high pressure on environmental protection, so as to improve the production environment, The effect of reducing environmental risks and reducing raw materials for production

Inactive Publication Date: 2019-02-22
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

It should be noted that the purification balance treatment carried out in the preparation process needs to consume a large amount of deionized water, which takes up to 2-4 days, and the removed ammonium sulfate is difficult to recycle after entering the aqueous solution, and the subsequent carbonization It takes another 1-2 days to soak the product in acid solution
This makes the whole process more complicated, the production cycle is longer, the efficiency is lower, and a large amount of waste water will be generated, the pressure on the producer's environmental protection is greater, and the cost is higher

Method used

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  • Preparation method of improved type graded porous carbon-doped material
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  • Preparation method of improved type graded porous carbon-doped material

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Experimental program
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Effect test

Embodiment 1

[0023] Add sodium alginate (0.4g) into deionized water (19.6mL), stir to dissolve it completely, then add aniline (0.372mL) to the solution and continue stirring to make the mixed system dissolve evenly. Pre-cool the reaction system at 0-4°C for half an hour, then add ammonium persulfate (0.912g) while stirring rapidly, stop stirring after a few seconds, and finally place the reaction system at room temperature for 12 hours to obtain poly Aniline-sodium alginate hydrogel hybrid system.

[0024] The prepared polyaniline-sodium alginate hydrogel mixed system was freeze-dried, then transferred to a tube furnace, and heated from room temperature to 600 °C at a rate of 5 °C / min under an argon atmosphere, and kept for carbonization for 2 h. After natural cooling, the obtained carbide was washed three times with deionized water, and then vacuum-dried at 60° C. for 24 hours to obtain hierarchically porous doped carbon.

Embodiment 2

[0026] Add sodium alginate (0.4g) into deionized water (19.6mL), stir to dissolve it completely, then add aniline (0.186mL) to the solution and continue stirring to make the mixed system dissolve evenly. Pre-cool the reaction system at 0-4°C for half an hour, then add ammonium persulfate (0.456g) while stirring rapidly, stop stirring after a few seconds, and finally place the reaction system at room temperature for 12 hours to obtain poly Aniline-sodium alginate hydrogel hybrid system.

[0027] The prepared polyaniline-sodium alginate hydrogel mixed system was freeze-dried, then transferred to a tube furnace, and raised from room temperature to 700°C at a rate of 5°C / min under an argon atmosphere, and then carbonized for 2 hours. After natural cooling, the obtained carbide was washed three times with deionized water, and then vacuum-dried at 60° C. for 24 hours to obtain hierarchically porous doped carbon.

Embodiment 3

[0029] Add sodium alginate (0.4g) into deionized water (19.6mL), stir to dissolve it completely, then add aniline (0.744mL) to the solution and continue stirring to make the mixed system dissolve evenly. Pre-cool the reaction system at 0-4°C for half an hour, then add ammonium persulfate (1.824g) while stirring rapidly, stop stirring after a few seconds, and finally place the reaction system at room temperature for 12h to obtain poly Aniline-sodium alginate hydrogel hybrid system.

[0030] The prepared polyaniline-sodium alginate hydrogel mixed system was freeze-dried, then transferred to a tube furnace, and raised from room temperature to 700°C at a rate of 5°C / min under an argon atmosphere, and then carbonized for 2 hours. After natural cooling, the obtained carbide was washed three times with deionized water, and then vacuum-dried at 60° C. for 24 hours to obtain hierarchically porous doped carbon.

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Abstract

The invention relates to a preparation method of an improved type graded porous carbon-doped material. The method mainly overcomes the shortcomings of complex technology, long production cycle, relatively low efficiency, much wastewater discharge, relatively high cost and the like of CN105480963A, abandons original steps such as deionized water purifying and balancing treatment and soaking treatment in an acid solution, and adopts a process of directly freeze-drying the prepared hydrogel and performing high-temperature carbonization and then washing and drying to obtain a target product. Compared with the prior art, in particular to the CN105480963A, the graded porous carbon-doped material prepared by the method provided by the invention has the advantages of more abundant doping atoms, more porous structures on the surface and more excellent electrical properties.

Description

technical field [0001] The invention relates to the technical field of electrochemical energy storage materials, in particular to a method for preparing an improved hierarchical porous doped carbon material. Background technique [0002] In response to the current severe environmental problems, researchers have developed various clean energy technologies, such as supercapacitors, fuel cells, lithium-ion batteries and other high-performance secondary batteries. In these energy conversion (storage) devices, the electrode material is the most critical component, which determines its performance. Due to good conductivity and long cycle life, carbon materials have become the most widely used electrode materials, and play a pivotal role in the electrodes of almost all energy conversion (storage) devices. Studies have shown that the performance of carbon materials can be further improved from two aspects: one is to dope them with heteroatoms, change the arrangement structure of at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318C01B32/336
CPCC01B32/318C01B32/336
Inventor 黄华波李亮刘玉兰杨帅裔姚军龙
Owner WUHAN INSTITUTE OF TECHNOLOGY
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