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A process for preparing camellia petal-based sulfur and nitrogen co-doped wrinkled carbon nanosheets by explosion method and a preparation method for supercapacitor electrodes

A technology for supercapacitors and carbon nanosheets, applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of high equipment requirements and low product yield, and achieve simple preparation methods, high specific surface area, and high ratio The effect of capacitance

Active Publication Date: 2017-10-31
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the methods for preparing carbon nanosheets from biomass carbon are mainly plasma-enhanced chemical vapor deposition method, arc discharge method, template method, etc. These methods not only require high equipment, but also have low product yields.

Method used

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  • A process for preparing camellia petal-based sulfur and nitrogen co-doped wrinkled carbon nanosheets by explosion method and a preparation method for supercapacitor electrodes
  • A process for preparing camellia petal-based sulfur and nitrogen co-doped wrinkled carbon nanosheets by explosion method and a preparation method for supercapacitor electrodes
  • A process for preparing camellia petal-based sulfur and nitrogen co-doped wrinkled carbon nanosheets by explosion method and a preparation method for supercapacitor electrodes

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Washing, drying and pulverizing the collected biomass raw materials withered camellia petals, passing through a 60-mesh sieve, and taking the part under the sieve. Weigh 2g of the under-sieve part and 2g of ammonium persulfate and put them into an agate mortar for grinding at the same time to make them fully mixed, transfer the uniform mixture to a magnetic boat for compaction with a medicine spoon, put it into a tube furnace to heat up under the protection of nitrogen To the reaction target temperature, the reaction is carried out, and the temperature is kept at 800° C. for 2 hours to form sulfur and nitrogen co-doped wrinkled carbon nanosheets.

[0045] The obtained camellia petal-based sulfur and nitrogen co-doped wrinkled carbon nanosheets were washed and dried. After testing, its specific surface area reaches 1500m 2 g -1 , with a total pore volume of 0.91 cm 3 g -1 , with a sulfur content of 2% and a nitrogen content of 5%;

[0046] Depend on figure 1 In a a...

Embodiment 2

[0055] Washing, drying and pulverizing the collected biomass raw materials withered camellia petals, passing through a 60-mesh sieve, and taking the part under the sieve. Weigh 2g of the under-sieve part and 2g of ammonium persulfate and put them into an agate mortar for grinding at the same time to make them fully mixed, transfer the uniform mixture to a magnetic boat for compaction with a medicine spoon, put it into a tube furnace to heat up under the protection of nitrogen The reaction is carried out until the reaction target temperature is maintained at 700° C. for 2 hours to form sulfur and nitrogen co-doped wrinkled carbon nanosheets.

[0056] The obtained camellia petal-based sulfur and nitrogen co-doped wrinkled carbon nanosheets were washed and dried. After testing, its specific surface area reaches 1122m 2 g -1 , with a total pore volume of 0.61 cm 3 g -1 .

[0057] Mix acetylene black, polytetrafluoroethylene, camellia petal-based sulfur, and nitrogen co-doped ...

Embodiment 3

[0060] Washing, drying and pulverizing the collected biomass raw materials withered camellia petals, passing through a 60-mesh sieve, and taking the part under the sieve. Weigh 2g of the under-sieve part and 2g of ammonium persulfate and put them into an agate mortar for grinding at the same time to make them fully mixed, transfer the uniform mixture to a magnetic boat for compaction with a medicine spoon, put it into a tube furnace to heat up under the protection of nitrogen To the target reaction temperature, the reaction is carried out, and the temperature is kept at 900° C. for 2 hours to form sulfur and nitrogen co-doped wrinkled carbon nanosheets.

[0061] The obtained camellia petal-based sulfur and nitrogen co-doped wrinkled carbon nanosheets were washed and dried. After testing, its specific surface area reaches 1563m 2 g -1 , with a total pore volume of 0.95 cm 3 g -1 , it should be noted that the product yield is very low under this condition, below 10%.

[006...

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Abstract

The invention belongs to the field of preparation of biomass-based carbon materials, and specifically discloses a process for preparing camellia petal-based sulfur and nitrogen co-doped wrinkled carbon nanosheets by explosion method and a preparation method for supercapacitor electrodes. The process includes the following steps: raw materials Pretreatment of Camellia petal-based sulfur and nitrogen co-doped wrinkled carbon nanosheets: Add nitrogen source, sulfur source and priming agent to the pretreated camellia petal powder and mix well, and put the mixture into the reactor , maintain the temperature at 700-900°C, and continue to react for 1-3 hours under the protection of inert gas; post-processing of the product. The present invention adopts the petals of camellia with flake structure as the carbon source, and after adding nitrogen source, sulfur source and detonating agent, a violent reaction similar to explosion occurs at high temperature, and the petals of camellia are torn into carbon nanosheets, and the carbonization and sulfurization of the petals of camellia are realized at the same time. , Nitrogen co-doping. The preparation method of the invention is simple, low in cost, high in production efficiency and energy saving, and the product has good electrochemical properties.

Description

technical field [0001] The invention belongs to the field of preparation of biomass-based carbon materials, and specifically relates to a process for preparing camellia petal-based sulfur and nitrogen co-doped wrinkled carbon nanosheets by an explosion method and a preparation method for supercapacitor electrodes. Background technique [0002] Supercapacitor is a new type of energy storage device, which has the characteristics of large specific capacitance, short charging time, long service life, good temperature characteristics and environmental protection. It bridges the high power output of traditional electrostatic capacitors and the high energy storage of batteries / fuel cells, and is considered to be an ideal chemical power source in the future, so it has broad application prospects and huge economic benefits. Among the supercapacitor electrode materials, various forms of carbon materials are the earliest and most widely used. [0003] Carbon electrode materials for su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/44H01G11/36H01G11/38H01G11/24
CPCY02E60/13
Inventor 魏晓林魏同业杨利文肖化平张祺
Owner XIANGTAN UNIV
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