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Method for preparing heteroatom co-doped porous carbon materials based on direct ionic liquid carbonization method

A technology of porous carbon materials and ionic liquids, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of complex synthesis process, poor plasticity, and failure to meet the urgent requirements of environmental protection, and achieve simple synthesis process, Solve the effect of toxic and complex, excellent cycle stability

Inactive Publication Date: 2017-05-10
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many ways to synthesize heteroatom-doped carbon materials. The current synthesis method is to add precursors with heteroatoms to the system, and the synthesis process is complicated and has poor plasticity, which does not meet the urgent requirements of environmental protection today.

Method used

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  • Method for preparing heteroatom co-doped porous carbon materials based on direct ionic liquid carbonization method
  • Method for preparing heteroatom co-doped porous carbon materials based on direct ionic liquid carbonization method
  • Method for preparing heteroatom co-doped porous carbon materials based on direct ionic liquid carbonization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Mix 0.3g glucose, 50mg graphene oxide, 10mlBMIMHSO 4 The ionic liquid was sonicated for 3 hours, and then baked in an oven at 90°C for 12 hours. The obtained mixture was pre-sintered in a tube furnace, heated and heated under the protection of an inert gas at a heating rate of 5°C / min, a heat treatment temperature of 500°C, and kept for 1 hour to obtain a carbon precursor. Mix the carbon precursor and alkali metal potassium hydroxide at a mass ratio of 1:4, place the mixture in a tube furnace, and heat it up under the protection of an inert gas. The heating rate is 5°C / min, and the heat treatment temperature is 800°C , keep warm for 2h, and cool down to room temperature with the furnace. The activated product was washed with hydrochloric acid and deionized water, dried, and ground to obtain the target product.

[0026] The structure was confirmed by X-ray photoelectron spectroscopy, such as figure 1 Shown is a nitrogen-sulfur co-doped porous carbon material.

[0027...

Embodiment 2

[0032] Mix 0.3g glucose, 50mg graphene oxide, 10mlBMIMHSO 4 The ionic liquid was sonicated for 3 hours, and then baked in an oven at 90°C for 12 hours. The obtained mixture was pre-sintered in a tube furnace, heated and heated under the protection of an inert gas at a heating rate of 5°C / min, a heat treatment temperature of 400°C, and kept for 2 hours to obtain a carbon precursor. Mix the carbon precursor and alkali metal potassium hydroxide at a mass ratio of 1:3, place the mixture in a tube furnace, and heat it up under the protection of an inert gas. The heating rate is 5°C / min, and the heat treatment temperature is 900°C , keep warm for 1h, and cool down to room temperature with the furnace. The activated product was washed with hydrochloric acid and deionized water, dried, and ground to obtain the target product.

[0033] 10mV s -1 The results of the electrochemical performance tests are listed in Table 1.

Embodiment 3

[0035] Mix 0.3g glucose, 50mg graphene oxide, 10mlBMIMHSO 4 The ionic liquid was sonicated for 3 hours, and then baked in an oven at 90°C for 12 hours. The obtained mixture was pre-sintered in a tube furnace, heated and heated under the protection of an inert gas at a heating rate of 5°C / min, a heat treatment temperature of 300°C, and kept for 3 hours to obtain a carbon precursor. Mix the carbon precursor and alkali metal potassium hydroxide at a mass ratio of 1:1, place the mixture in a tube furnace, and heat it up under the protection of an inert gas. The heating rate is 5°C / min, and the heat treatment temperature is 700°C. , keep warm for 3h, and cool down to room temperature with the furnace. The activated product was washed with hydrochloric acid and deionized water, dried, and ground to obtain the target product.

[0036] 10mV s -1 The results of the electrochemical performance tests are listed in Table 1.

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Abstract

The invention belongs to the field of battery electrode materials, and relates to a method for preparing heteroatom co-doped porous carbon materials based on a direct ionic liquid carbonization method. The heteroatom co-doped porous carbon materials prepared by the direct ionic liquid carbonization method have proper pore size distribution and high specific surface area, and show high specific capacity and excellent circulating stability when serving as super-capacitor and lithium secondary battery electrode materials. The synthesis process of the heteroatom co-doped porous carbon materials synthesized by the direct ionic liquid carbonization method is simple, and other heteroatom sources are omitted. The heteroatom co-doped porous carbon materials synthesized by ionic liquid serving as a green solvent is green, environmentally friendly and high in practical level, and the problems of toxicity and complexity of a current preparation process of heteroatom doped electrode materials are solved.

Description

technical field [0001] The invention belongs to the field of battery electrode materials, and relates to a method for preparing heteroatom co-doped porous carbon materials based on an ionic liquid direct carbonization method. Background technique [0002] The rapid development of human society has caused people to pay more and more attention to the shortage of traditional fossil energy. In order to solve these problems, human beings must rely more on clean and renewable new energy. New energy storage devices such as supercapacitors and lithium secondary batteries meet human needs for new energy sources. Electrode materials play a pivotal role in the development of efficient energy storage devices. Porous carbon materials have the characteristics of high surface area, adjustable pore size, superior electrochemical performance and environmental friendliness, and are widely used as electrode materials in lithium secondary batteries and supercapacitors. The synthesis of carbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348H01G11/50H01G11/26H01G11/32H01M4/583
CPCC01P2002/85C01P2004/03C01P2004/20H01G11/26H01G11/32H01G11/50H01M4/583H01M2004/021Y02E60/10Y02E60/13
Inventor 颜洋郝晓凤牟文生
Owner DALIAN UNIV OF TECH
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