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A nitrogen-boron co-doped porous carbon material based on breaking the bn bond and its preparation method and application

A porous carbon material and co-doping technology, which is applied in the preparation/purification of carbon, can solve the problems of long time consumption and complicated preparation process, and achieve the effects of high specific capacitance, simple synthesis process and simplified doping process.

Active Publication Date: 2021-07-16
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the prior art has the technical problem that the preparation process is complicated and time-consuming due to the inability to add nitrogen and boron at the same time

Method used

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  • A nitrogen-boron co-doped porous carbon material based on breaking the bn bond and its preparation method and application
  • A nitrogen-boron co-doped porous carbon material based on breaking the bn bond and its preparation method and application
  • A nitrogen-boron co-doped porous carbon material based on breaking the bn bond and its preparation method and application

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Embodiment

[0037] A method for preparing a nitrogen-boron co-doped porous carbon material based on breaking the BN bond:

[0038] Step 1) Mix sodium hydroxide, resorcinol, formaldehyde, and boron nitride in a mass ratio of 0.02:1:2:3, weigh 0.02g of sodium hydroxide, 2.2g of resorcinol, 4.4g of formaldehyde, and nitrogen 3 g of boron chloride was prepared into a solution, stirred at room temperature for 4 hours, and hydrothermally reacted at 160°C for 24 hours to obtain a nitrogen-containing boron gel;

[0039] Step 2) Freeze-dry the nitrogen-boron-containing gel at minus 40 degrees for 48 hours to obtain a dried nitrogen-boron-containing gel;

[0040] Step 3) Mix the dry nitrogen-containing gel with the basic inorganic substance potassium hydroxide at a mass ratio of 1:2, add an appropriate amount of distilled water, and grind at room temperature for 0.5 hours to obtain activated nitrogen-doped boron porous carbon;

[0041] Step 4) Carbonize the nitrogen-doped boron precursor in a nitr...

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Abstract

The invention discloses a nitrogen-boron co-doped porous carbon material based on breaking the BN bond. The nitrogen-containing gel is obtained by hydrothermal reaction of resorcinol, formaldehyde and boron nitride under alkaline conditions. After freeze-drying, the alkaline Inorganic matter is ground, carbonized, washed, and dried, and its specific surface area ranges from 1000 to 1200 m 2 g ‑1 . Its preparation method includes: 1) preparation of nitrogen-containing gel; 2) drying of nitrogen-containing gel; 3) activation of nitrogen-containing gel; 4) carbonization of nitrogen-containing gel; Preparation of doped porous carbon materials. As the application of supercapacitor electrode material, the current density is 20~0.5 A / g, and the specific capacitance reaches 150.0~250.0 F / g. Compared with the two-step doping of nitrogen source and boron source in the prior art, the most prominent advantage of the present invention is the one-step doping of nitrogen source and boron source, which easily breaks the stable BN bond, greatly improves production efficiency, and reduces It has broad application prospects in the field of supercapacitors.

Description

technical field [0001] The invention belongs to the field of electrochemical supercapacitors, in particular to a nitrogen-boron co-doped porous carbon material based on breaking BN bonds. Background technique [0002] With the rapid growth of population and rapid economic development, the shortage of resources and energy has become one of the important problems to be solved urgently in contemporary society. Therefore, the development and application of clean and renewable energy plays a key role in national economic development and solving environmental problems. Electric energy, wind energy, solar energy, tidal energy, etc. have all received widespread attention, and finding a suitable energy storage device is a crucial link. [0003] Supercapacitor is a new type of energy storage device between traditional capacitors and rechargeable batteries. It has the advantages of high power density, long cycle life, fast charge and discharge rate, wide temperature range, and no poll...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05
Inventor 孙立贤印世璐徐芬陆常建康沛文王飞飞胡锦炀陈沛荣曹黎志
Owner GUILIN UNIV OF ELECTRONIC TECH
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