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In-situ nitrogen-doped porous carbon microsphere preparation method

A technology of nitrogen-doped porous carbon and microspheres, which is applied in the preparation/purification of carbon, can solve the problems of complicated preparation method and time-consuming, and achieve the effects of good dispersibility, high specific capacity and excellent cycle stability.

Inactive Publication Date: 2018-08-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have disadvantages such as complex preparation methods, or the need to use templates in the preparation process, which takes a long time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Ammonia, water, ethanol, resorcinol and pyridine-2-carbaldehyde are taken in parts by mass of 1:44:13.8:1.1:1.3. Mix ammonia water, water and ethanol evenly, add resorcinol, add pyridine-2-carboxaldehyde under stirring; stir at 50°C for 60min, and conduct hydrothermal reaction at 100°C for 24h to prepare nitrogen-containing polymer microspheres. After the microspheres were dried, they were carbonized in an inert gas atmosphere from room temperature to 700° C. at a heating rate of 5° C. / min to obtain nitrogen-doped porous carbon microspheres.

Embodiment 2

[0015] Ammonia, water, ethanol, resorcinol and pyridine-2-carbaldehyde are taken in parts by mass of 1:44:13.8:1.5:2. Mix ammonia water, water and ethanol evenly, add resorcinol, add pyridine-2-carboxaldehyde under stirring; stir at 50°C for 60min, and conduct hydrothermal reaction at 100°C for 24h to prepare nitrogen-containing polymer microspheres. After the microspheres were dried, they were carbonized in an inert gas atmosphere from room temperature to 800° C. at a heating rate of 7° C. / min to obtain nitrogen-doped porous carbon microspheres.

Embodiment 3

[0017] Ammonia, water, ethanol, resorcinol and pyridine-2-carbaldehyde are taken in parts by mass of 1:44:13.8:2.2:2.6. Mix ammonia water, water and ethanol evenly, add resorcinol, add pyridine-2-carboxaldehyde under stirring; stir at 50°C for 60min, and conduct hydrothermal reaction at 100°C for 24h to prepare nitrogen-containing polymer microspheres. After the microspheres are dried, they are carbonized in an inert gas atmosphere from room temperature to 900° C. at a heating rate of 10° C. / min to obtain nitrogen-doped porous carbon microspheres.

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PUM

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Abstract

The invention relates to an in-situ nitrogen-doped porous carbon microsphere preparation method. The method includes: mixing ammonium hydroxide, water and ethyl alcohol, adding resorcinol, and addingpyridine-2-formaldehyde under the condition of stirring; stirring for 60min at 50 DEG C, and performing hydrothermal reaction at 100 DEG C for 24h to obtain nitrogenous polymer microspheres; after drying of the microspheres, in an inert gas atmosphere, heating from the room temperature to 700-900 DEG C by a heating rate of 5-10DEG C / min, and carbonizing to obtain nitrogen-doped porous carbon microspheres. The in-situ nitrogen-doped porous carbon microsphere preparation method is simple in process, and the nitrogen-doped porous carbon microspheres serving as supercapacitor electrode materials show high specific capacity and high cycle stability.

Description

technical field [0001] The invention relates to a method for preparing in-situ nitrogen-doped porous carbon microspheres, belonging to the technical field of material preparation. Background technique [0002] Supercapacitor is a new type of energy storage device between batteries and traditional capacitors. It has the advantages of high power density and long cycle life. It has broad application prospects in the fields of electric vehicles and electronic products. As electrode materials for electric double layer capacitors, carbon materials exhibit good physical and chemical stability and cycle stability, and have a wide operating temperature range. Due to their unique nanostructure and morphology, carbon microspheres not only have abundant pores, but also can form stacking pores through the accumulation between spheres. These stacking pores can be used as "ion reservoirs" to reduce the transmission of electrolyte ions into the internal pores of the spheres. The path is co...

Claims

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Application Information

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IPC IPC(8): C01B32/05
CPCC01B32/05
Inventor 甘礼华陈毅刘明贤
Owner TONGJI UNIV