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Method for preparing boron-nitrogen-doped porous carbon material applied to super capacitor under microwave hydrothermal assistance

A supercapacitor and microwave-assisted technology, applied in hybrid capacitor electrodes, applications, household appliances, etc., can solve the problems of complex preparation process, many instruments, and long preparation time of porous carbon materials, and achieve shortened preparation time, fast heating, and improved The effect of binding volume

Inactive Publication Date: 2019-01-22
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation process of the porous carbon material prepared above is complex, many instruments are used in the operation process, the preparation time is long, and most of the raw materials are harmful substances such as melamine, formaldehyde, polyaniline, etc. Needed

Method used

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  • Method for preparing boron-nitrogen-doped porous carbon material applied to super capacitor under microwave hydrothermal assistance
  • Method for preparing boron-nitrogen-doped porous carbon material applied to super capacitor under microwave hydrothermal assistance
  • Method for preparing boron-nitrogen-doped porous carbon material applied to super capacitor under microwave hydrothermal assistance

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Effect test

Embodiment 1

[0024] Preparation of boron-nitrogen co-doped porous carbon material: Take 2g of fir bark powder, put it in a glass beaker, add 8g of ammonium pentaborate tetrahydrate solid, then add 40ml of deionized water, and then use a magnetic stirrer at a speed of 800r / min Stir for 30 minutes, transfer the stirred mixture to a microwave hydrothermal reaction kettle, place it in a microwave hydrothermal synthesizer, and react for 10 minutes at a temperature of 180°C and a pressure of 1.85 MPa. After cooling naturally to room temperature, take it out, and then Dry in a vacuum oven at 105°C for 12h, then place the dried powder in a horizontal tube furnace, sinter at 700°C in a nitrogen atmosphere for 1h, then wash and filter twice with hot water at 90°C, and bake After drying, the boron-nitrogen co-doped porous carbon material is obtained. According to the XPS test, the boron content of the material is 10.14wt%, and the nitrogen content is 15.13wt%.

[0025] Supercapacitor electrode prepa...

Embodiment 2

[0027] Preparation of boron-nitrogen co-doped porous carbon material: Take 2g of fir bark powder, put it in a glass beaker, add 8g of ammonium pentaborate tetrahydrate solid, then add 45ml of deionized water, and then use a magnetic stirrer at a speed of 800r / min Stir for 30 minutes, transfer the stirred mixture to a microwave hydrothermal reaction kettle, place it in a microwave hydrothermal synthesizer, and react for 20 minutes at a temperature of 180°C and a pressure of 1.85 MPa. After cooling naturally to room temperature, take it out, and then place it in a microwave hydrothermal synthesizer. Dry in a vacuum oven at 105°C for 12h, then place the dried powder in a horizontal tube furnace, sinter at 800°C for 1h in a nitrogen atmosphere, wash and filter twice with hot water at 90°C, and dry The boron-nitrogen co-doped porous carbon material is obtained. According to the XPS test, the boron content of the material is 13.05wt%, and the nitrogen content is 16.69wt%.

[0028] ...

Embodiment 3

[0030] Preparation of boron-nitrogen co-doped porous carbon material: Take 2g of fir bark powder, put it in a glass beaker, add 8g of ammonium pentaborate tetrahydrate solid, then add 50ml of deionized water, and then use a magnetic stirrer at a speed of 800r / min Stir for 30 minutes, transfer the stirred mixture to a microwave hydrothermal reaction kettle, place it in a microwave hydrothermal synthesizer, react at a temperature of 180°C and a pressure of 1.85MPa for 30 minutes, wait for natural cooling to room temperature, take it out, and place Dry in a vacuum oven at 105°C for 12h, then place the dried powder in a horizontal tube furnace, sinter at 800°C for 1h in a nitrogen atmosphere, wash and filter twice with hot water at 90°C, and dry The boron-nitrogen co-doped porous carbon material is obtained. According to the XPS test, the boron content of the material is 10.19wt%, and the nitrogen content is 17.97wt%.

[0031] Supercapacitor electrode preparation: Take 80 mg of t...

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Abstract

The invention relates to a method for preparing a boron-nitrogen-doped porous carbon material applied to a super capacitor under microwave hydrothermal assistance. The method is characterized in thatChinese fir bark is taken as a raw material, and ammonium pentaborate tetrahydrate is taken as a boron source and a nitrogen source. The method comprises the following steps: firstly, performing boron-nitrogen heteroatom doping under microwave hydrothermal assistance; performing high-temperature pyrolysis to obtain the boron-nitrogen-doped porous carbon material, which is 10.19 to 13.05 percent byweight in boron content, is 15.13 to 19.5 percent by weight in nitrogen content, and can be up to 820 to 955m<2> / g in specific surface area. By adopting method, heteroatom doping is realized under microwave hydrothermal assistance through high-temperature pyrolysis, and a carbon material with a large specific surface area is prepared. The method is easy and convenient to operate, and the preparation time of the carbon material is shortened greatly. Meanwhile, strong acid, strong alkali and toxic reagents are not used in the preparation process, so that the process is environmentally friendly,and the prepared boron-nitrogen-doped porous carbon material has a certain application prospect in the field of super capacitors.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor energy storage, and in particular relates to a microwave-assisted hydrothermal preparation method for boron-nitrogen co-doped porous carbon materials used in supercapacitors. Background technique [0002] Supercapacitors have been widely studied for their high safety, wide operating temperature range, long life, and fast charging and discharging. They have been successfully applied in the field of electronic mobile communications, power systems of electric vehicles, and aviation and military fields. The performance of supercapacitors mainly depends on the specific surface area, pore structure, and apparent chemical properties of the electrode material. Carbon materials have become the most widely used due to their high specific surface area, high pore volume, stable performance, low cost, and environmental friendliness. electrode material. The apparent properties of carbon materials, surfa...

Claims

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Application Information

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IPC IPC(8): C04B35/52C04B35/622C04B38/06H01G11/32H01G11/26
CPCH01G11/26H01G11/32C04B35/52C04B35/622C04B35/62209C04B38/0675C04B2235/44C04B2235/96Y02E60/13
Inventor 赵伟刚罗路吴希陈婷婷李泽亮张志诚
Owner FUJIAN AGRI & FORESTRY UNIV
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