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A two-dimensional nitrogen-doped porous carbon nanosheet and its preparation method

A technology of nitrogen-doped porous carbon and carbon nanosheets, which is applied in the manufacture of nano-carbon, hybrid/electric double-layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of uneven mesopores, easy agglomeration, and poor cycle stability of capacitors. Achieve the effects of promoting uniform dispersion, improving doping quality, and good stability

Active Publication Date: 2020-07-31
华芯检测(无锡)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the mesopores formed by carbon nanosheets are not uniform, easy to agglomerate, and have poor capacitance cycle stability, thereby providing a two-dimensional nitrogen-doped porous carbon nanosheet and its preparation method

Method used

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  • A two-dimensional nitrogen-doped porous carbon nanosheet and its preparation method
  • A two-dimensional nitrogen-doped porous carbon nanosheet and its preparation method
  • A two-dimensional nitrogen-doped porous carbon nanosheet and its preparation method

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Embodiment 1

[0033] (1) Weigh 10 g of potassium citrate and put it into a corundum crucible, put the corundum crucible into a tube furnace, calcinate under the protection of an inert gas, raise the temperature to 850°C at a heating rate of 2°C / min, and keep it for 1h. After cooling down to room temperature naturally, the samples were collected by grinding with agate to obtain carbon nanosheets;

[0034] (2) adding the carbon nanomaterials prepared in step (1) to oxidation reaction in 500ml oxidizing acidic solution, the oxidizing acidic solution is configured by volume ratio of 1:1:1 by sulfuric acid, nitric acid and hydrogen peroxide, after the reaction is completed, wash, Wash and centrifuge twice with deionized water and ethanol respectively, and dry in a vacuum oven at 60°C for 12 hours to obtain porous carbon nanosheets;

[0035](3) Weigh 10 mg of the porous carbon nanomaterial prepared in step (2) and 10 mg of sodium dodecylbenzenesulfonate and add it to 200 ml of deionized water, co...

Embodiment 2

[0039] (1) Weigh 12 g of potassium citrate and put it into a corundum crucible, put the corundum crucible into a tube furnace, calcinate under the protection of an inert gas, raise the temperature to 850°C at a heating rate of 2°C / min, and keep it for 1h. After cooling down to room temperature naturally, the samples were collected by grinding with agate to obtain carbon nanosheets;

[0040] (2) Add the carbon nanomaterials prepared in step (1) into 450ml oxidative acidic solution for oxidation reaction. The oxidative acidic solution is configured by sulfuric acid, nitric acid and hydrogen peroxide in a volume ratio of 2:0.5:2. After the reaction, wash , washed and centrifuged twice with deionized water and ethanol respectively, and dried in a vacuum oven at 60°C for 12 hours to obtain porous carbon nanosheets;

[0041] (3) Weigh 20 mg of the porous carbon nanomaterial prepared in step (2) and 10 mg of sodium dodecylbenzenesulfonate and add it to 200 ml of deionized water, cont...

Embodiment 3

[0044] (1) Weigh 8 g of potassium citrate and put it into a corundum crucible, put the corundum crucible into a tube furnace, calcinate under the protection of an inert gas, raise the temperature to 850°C at a heating rate of 2°C / min, and keep it for 1h. After cooling down to room temperature naturally, the samples were collected by grinding with agate to obtain carbon nanosheets;

[0045] (2) Add the carbon nanomaterials prepared in step (1) into 550ml oxidative acidic solution for oxidation reaction, the oxidative acidic solution is configured by sulfuric acid, nitric acid and hydrogen peroxide in a volume ratio of 1:1:1, wash after the reaction , washed and centrifuged twice with deionized water and ethanol respectively, and dried in a vacuum oven at 60°C for 12 hours to obtain porous carbon nanosheets;

[0046] (3) Weigh 10 mg of the porous carbon nanomaterial prepared in step (2) and 20 mg of sodium dodecylbenzenesulfonate and add it to 200 ml of deionized water, continue...

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Abstract

The invention relates to the field of new-type flexible electrode materials and in particular to a two-dimensional nitrogen-doped porous carbon nanosheet and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a carbon nanosheet: performing first calcining on a carbon material in protection of an inert gas, cooling, and preparing the carbon nanosheet;(2) preparing a porous carbon nanosheet: adding the carbon nanosheet to oxidized acidic solution and performing an oxidation reaction, preparing the porous carbon nanosheet; and (3) preparing the two-dimensional nitrogen-doped porous carbon nanosheet: adding the porous carbon nanosheet and a surfactant to water, uniformly dispersing, adding a nitrogen-doped material, dissolving, uniformly mixing,after drying, grinding to obtain mixture powder, and performing second calcining on the mixture powder in the protection of the inert gas, cooling, and preparing the two-dimensional nitrogen-doped porous carbon nanosheet. The prepared two-dimensional nitrogen-doped porous carbon nanosheet has uniform porosity, good energy storage performance and circulation stability.

Description

technical field [0001] The invention relates to the field of novel flexible electrode materials, in particular to a two-dimensional nitrogen-doped porous carbon nanosheet and a preparation method thereof. Background technique [0002] With the rapid development of wearable and portable electronic devices, various flexible electronic products have come out one after another. Flexible wearable energy storage devices, especially supercapacitors, have many advantages in energy storage, and have much higher power density than electrostatic capacitors. They are not only suitable for short-term power output, but also have high specific power, specific It has the characteristics of large energy and multiple energy storage at one time. In addition, supercapacitors also have the unique advantages of small internal resistance, high charge and discharge efficiency, long cycle life, and no pollution. Combining them with other components to work together is an effective way to achieve en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/86H01G11/30H01G11/36C01B32/15
CPCC01B32/15H01G11/24H01G11/30H01G11/36H01G11/86Y02E60/13
Inventor 陈明
Owner 华芯检测(无锡)有限公司
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