Nitrogen-oxygen co-doped porous carbon nanobelt and its preparation method and application

A carbon nanobelt and co-doping technology, applied in the field of electrode materials, can solve the problems of unsatisfactory electrochemical performance, unsatisfactory rate performance, low capacity, etc., achieve good rate performance and cycle stability, improve electrochemical performance, The effect of high specific surface area utilization

Active Publication Date: 2020-09-04
SHENZHEN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and provide a nitrogen-oxygen co-doped porous carbon nanobelt and its preparation method to solve the problems of existing carbon materials with small specific surface area, poor wettability, single pore size, and poor electrochemical performance. suboptimal technical issues
[0006] Another object of the present invention is to provide a supercapacitor electrode and a supercapacitor to solve the technical problems of low capacity and unsatisfactory rate performance of the existing supercapacitor due to its electrode material

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  • Nitrogen-oxygen co-doped porous carbon nanobelt and its preparation method and application
  • Nitrogen-oxygen co-doped porous carbon nanobelt and its preparation method and application
  • Nitrogen-oxygen co-doped porous carbon nanobelt and its preparation method and application

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preparation example Construction

[0025] On the one hand, the embodiment of the present invention provides a preparation method of nitrogen and oxygen co-doped porous carbon nanobelts. The preparation method of the nitrogen-oxygen co-doped porous carbon nanobelt comprises the following steps:

[0026] Step S01. Prepare carbon nanobelt precursor:

[0027] Formaldehyde and hydroquinone are hydrothermally reacted in an acidic solution to obtain a carbon nanobelt precursor;

[0028] Step S02. Carbonizing and activating the carbon nanobelt precursor:

[0029] The carbon nanobelt precursor is subjected to carbonization treatment and ammonia water activation treatment to obtain nitrogen and oxygen co-doped porous carbon nanobelts.

[0030] Wherein, in step S01, the polymerization reaction of formaldehyde and hydroquinone in an acidic solution is carried out to generate a ladder-shaped polymer. The hydrothermal reaction chemical formula between described formaldehyde and hydroquinone is as follows:

[0031]

[...

Embodiment 1

[0052] This embodiment provides a nitrogen-oxygen co-doped porous carbon nanobelt and a preparation method thereof. The preparation method of the nitrogen-oxygen co-doped porous carbon nanobelt comprises the following steps:

[0053] S11: Weigh 120g of 10% dilute hydrochloric acid, 2.5g of 37% formaldehyde solution, and 1.65g of hydroquinone, and stir the three for 30 minutes until a uniform and transparent solution is formed;

[0054] S12: Pour the solution prepared in the above steps into a polytetrafluoroethylene-lined hydrothermal reaction kettle, seal the hydrothermal kettle and put it in an oven at 180°C, react for 12 hours, and cool it down to room temperature naturally;

[0055] S13: Filter the product obtained in the above steps, wash it with deionized water for 5 times, then place it in a vacuum drying oven, and dry it at 60°C for 24 hours;

[0056] S14: Grinding the dried product (carbon nanobelt precursor) into powder, sealed and stored for later use;

[0057] S1...

Embodiment 2

[0060] This embodiment provides a nitrogen-oxygen co-doped porous carbon nanobelt and a preparation method thereof. The preparation method of the nitrogen-oxygen co-doped porous carbon nanobelt comprises the following steps:

[0061] S11: Weigh 125g of 10% dilute hydrochloric acid, 2.8g of 37% formaldehyde solution, and 1.5g of hydroquinone, and stir the three for 20 minutes;

[0062] S12: Pour the solution prepared in the above steps into a polytetrafluoroethylene-lined hydrothermal reaction kettle, seal the hydrothermal kettle and place it in an oven at 150°C, react for 15 hours, and naturally cool to room temperature;

[0063] S13: Filter the product obtained in the above steps, wash it with deionized water for 6 times, and then place it in a common drying oven and dry it at 80°C for 15 hours;

[0064] S14: Grinding the dried product (carbon nanobelt precursor) into powder, sealed and stored for later use;

[0065] S15: Take 1.0 g of carbon nanobelts and put them in a cor...

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Abstract

The invention discloses a nitrogen oxygen co-doped porous carbon nano belt, a preparation method, a super capacitor electrode and a super capacitor. The preparation method comprises steps of carryingout a hydrothermal reaction on formaldehyde and hydroquinone in the acid solution so as to obtain a carbon nano belt precursor; and carrying out carbonizing treatment and ammonium hydroxide activatingtreatment on the carbon nano belt precursor so as to obtain a nitrogen oxygen co-doped porous carbon belt. According to the invention, the nano belt has quite big specific area, good wettability, andhigh specific area utilization rate. The super capacitor electrode and the super capacitor have the prepared nitrogen oxygen co-doped porous carbon nano belt.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to a nitrogen-oxygen co-doped porous carbon nanobelt and its preparation method and application. Background technique [0002] With the increasing scarcity of natural resources and increasingly serious environmental pollution, all countries are forced to work hard to find new sustainable energy sources and advanced energy storage technologies. New energy and new materials are also listed as my country's seven strategic emerging industries. In recent years, supercapacitors have attracted great attention. It is a new type of energy storage device between batteries and electrolytic capacitors. Compared with traditional capacitors, it has larger specific capacity and higher Energy density; compared with batteries, supercapacitors have a longer cycle life and higher power density, and can be quickly charged and discharged under high current conditions. Broad application pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/36H01M4/583C01B32/318C01B32/342B01D53/02B01J27/24B01J37/10B82Y30/00B82Y40/00
CPCB01D53/02B01J27/24B01J37/10B82Y30/00B82Y40/00C01B32/318C01B32/342C01P2002/80C01P2004/03C01P2006/40H01G11/24H01G11/36H01M4/583Y02E60/10Y02E60/13
Inventor 邹继兆余良曾燮榕曾绍忠黎晓华姚跃超刘世钰涂文烜陈双双
Owner SHENZHEN UNIV
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