Preparation method and application of carbon nanometer cage material with high nitrogen doping amount

A carbon nano-cage and doping amount technology, which is applied in nano-carbon, nano-technology, hybrid capacitor electrodes, etc., can solve problems such as differences in the preparation methods of nitrogen-doped carbon materials, and achieve excellent capacitance characteristics, uniform size and low price. Effect

Pending Publication Date: 2019-07-19
JINING MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also differences in the preparation methods of nitrogen-doped carbon materials reported publicly as electrode materials for supercapacitors.

Method used

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  • Preparation method and application of carbon nanometer cage material with high nitrogen doping amount
  • Preparation method and application of carbon nanometer cage material with high nitrogen doping amount
  • Preparation method and application of carbon nanometer cage material with high nitrogen doping amount

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 3g of sucrose, 18g of potassium chloride, and 3g of dicyandiamide into a polytetrafluoro ball mill jar, then weigh 100g of agate balls into the ball mill jar, and mill for 2 hours. Put the ball-milled solid powder in a quartz boat, and then put it into a tube furnace equipped with a quartz tube; feed nitrogen inert gas, and the flow rate of the inert gas in the tube furnace is 50mL min -1 , then at 5°C min -1 Raise the temperature to 800°C at the heating rate, and the high-temperature carbonization holding time is 2 hours to obtain the initial product. The obtained primary product was soaked in hot water for 8 hours, then suction filtered, and dried in an oven at 80° C. for 24 hours to obtain a nitrogen-doped carbon nanocage material with a nitrogen content of 11.3 at%.

[0031] The carbon nanocage material prepared in this embodiment is prepared into an electrode sheet after being mixed in the ratio of active material: conductive agent (graphite): binder (polyte...

Embodiment 2

[0033] Weigh 3g of sucrose, 0.3g of potassium chloride, and 0.3g of dicyandiamide into a polytetrafluoro ball mill jar, then weigh 3.6g of agate balls into the ball mill jar, and mill for 0.1h. Put the ball-milled solid powder in a quartz boat, and then put it into a tube furnace equipped with a quartz tube; feed nitrogen inert gas, and the flow rate of the inert gas in the tube furnace is 20mLmin -1 , then at 1°C min -1 Raise the temperature to 1000°C at a certain heating rate, and the high-temperature carbonization holding time is 0.01h to obtain the primary product. The obtained primary product was soaked in hot water at 10° C. for 24 hours, then suction-filtered, and dried in an oven at 80° C. for 24 hours to obtain a nitrogen-doped carbon nanocage material with a nitrogen content of 10.9 at%.

Embodiment 3

[0035] Weigh 3g of sucrose, 100g of potassium chloride, and 30g of dicyandiamide into a polytetrafluoro ball mill jar, then weigh 133g of agate balls into the ball mill jar, and mill for 12 hours. Put the ball-milled solid powder in a quartz boat, and then put it into a tube furnace equipped with a quartz tube; feed nitrogen inert gas, and the flow rate of the inert gas in the tube furnace is 100mLmin -1 , then at 20°C min -1 Raise the temperature to 500°C at a heating rate of 0.1 h to obtain the initial product. The obtained primary product was soaked in hot water at 100°C for 0.1h, then suction filtered, and dried in an oven at 80°C for 24h to obtain a nitrogen-doped carbon nanocage material with a nitrogen content of 11.2at%.

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Abstract

The invention belongs to the technical field of super-capacitor electrode materials and specifically relates to a preparation method and application of a carbon nanometer cage material with high nitrogen doping amount. The preparation method and the application provided by the invention have the benefits that sucrose is taken as a carbon source, dicyandiamide is taken as a nitrogen source, and potassium chloride is taken as a template; the raw materials are subjected to high-temperature carbonization treatment after being ball-milled in a ball mill, so that a material in which carbon is wrapped on the surface of potassium chloride is obtained and soaked to dissolve potassium chloride and remove the potassium chloride template, therefore, the nitrogen-doped carbon nanometer cage material isobtained; the preparation method is simple in process and suitable for large-scale industrial production, and the template is removed through direct water soaking without a strong acid solution or astrong alkali solution. Therefore, environmental protection is realized; the prepared carbon nanometer cage material can be used as the super-capacitor electrode material and has excellent capacitancecharacteristics; a cyclic voltammetry curve presents a rectangular shape of the ideal capacitor electrode material, and the specific capacitance at a scanning speed of 2 mV / s can reach 238 F / g.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor electrode materials, and in particular relates to a preparation method and application of a carbon nanocage material with high nitrogen doping content. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are a new type of energy storage device between traditional flat capacitors and secondary batteries. Compared with traditional secondary batteries, supercapacitors have the advantages of high power density and long cycle life, and can be used as power sources for electronic devices and electric vehicles, so they have broad application prospects. At present, supercapacitors with activated carbon as electrode materials have been commercialized and widely used in many fields. However, due to the low proportion of mesopores and no macropores in activated carbon, the supercapacitance rate performance of activated carbon electrodes is poor. In recent years, ...

Claims

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Application Information

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IPC IPC(8): C01B32/15H01G11/30H01G11/36H01G11/44H01G11/34H01G11/24B82Y40/00
CPCC01B32/15H01G11/30H01G11/36H01G11/44H01G11/34H01G11/24B82Y40/00Y02E60/13
Inventor 姜靓王静徐香玉毛旭艳杨姝涵宋文娜
Owner JINING MEDICAL UNIV
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