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Porous carbon nanometer material and preparation method and purpose thereof

A carbon nanomaterial and nanomaterial technology, applied in the field of porous carbon nanomaterials and their preparation, can solve problems such as electrolyte channel blockage, and achieve the effects of improving specific capacitance, wide application and increasing specific surface area.

Inactive Publication Date: 2018-04-03
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the capacitor electrode materials are powder materials, which need to be bonded together. If the thickness of the electrode prepared by this method is too large, it will cause the blockage of the electrolyte channel.

Method used

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  • Porous carbon nanometer material and preparation method and purpose thereof
  • Porous carbon nanometer material and preparation method and purpose thereof
  • Porous carbon nanometer material and preparation method and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Add 1 g of pyrene and 0.2 g of graphene oxide into 50 mL of nitrobenzene, add 3 g of ferric chloride, and react at 80 ° C for 24 hours. After the reaction is completed, filter to obtain a composite of the two, and then mix the composite with 5g of anhydrous zinc chloride was mixed evenly, and transferred to a tube furnace, reacted at 700°C for 3 hours, and after naturally cooling to room temperature, the obtained carbon nanocomposite was washed successively with 5wt% hydrochloric acid, purified water, and tetrahydrofuran, Then put it into an oven and dry at 120° C. for 10 hours to obtain a porous carbon nanomaterial.

[0059] Performance Characterization:

[0060] The specific surface and pore size distribution of the porous carbon nanomaterials are measured by the isothermal adsorption-desorption method of nitrogen at 77K, the specific surface area is calculated by the BET method, and the pore size distribution is calculated by the DFT method. The specific surface are...

Embodiment 2

[0067] Add 1 g of pyrene to 50 mL of nitrobenzene, add 3 g of ferric chloride, react at 80 ° C for 24 hours, filter to obtain a microporous polymer after the reaction, and then mix this polymer with 5 g of anhydrous zinc chloride Uniform, and transferred to a tube furnace, reacted at 700 ° C for 3 hours, after cooling to room temperature naturally, the obtained carbon nanomaterials were washed with 5wt% hydrochloric acid, purified water, tetrahydrofuran, and then put into an oven. °C for 10 hours to obtain porous carbon nanomaterials.

[0068] The porous carbon nanomaterial is measured, and at a current density of 0.5A / g, the specific capacitance is 198F / g; at a current density of 10A / g, the specific capacitance is 169F / g, indicating that the material has high specific capacitance and high Rate performance; after 10,000 cycles at a current density of 10A / g, the specific capacity has no attenuation, indicating that the material has good cycle performance.

[0069] The specific...

Embodiment 3

[0071] Add 1g of coal tar to 50mL of nitrobenzene, add 3g of ferric chloride, and react at 80°C for 24 hours. After the reaction is completed, filter to obtain a microporous polymer, and then mix the polymer with 5g of anhydrous zinc chloride evenly. and transferred to a tube furnace, and reacted at 700°C for 3 hours, and after naturally cooling to room temperature, the obtained carbon nanomaterials were washed with 5wt% hydrochloric acid, purified water, and tetrahydrofuran successively, and then put into an oven and heated at 120°C. Dry for 10 hours to obtain porous carbon nanomaterials.

[0072] The porous carbon nanomaterial is measured, and at a current density of 0.5A / g, the specific capacitance is 214F / g; at a current density of 10A / g, the specific capacitance is 182F / g, indicating that the material has high specific capacitance and high Rate performance; after 10,000 cycles at a current density of 10A / g, the specific capacity has no attenuation, indicating that the mat...

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Abstract

The invention provides a porous carbon nanometer material and preparation method and purpose thereof. The porous carbon nanometer structure is prepared by heat treatment on a conjugate microporous polymer obtained through polymerization of polymerization molecules through Friedel-Crafts reaction or Scholl Reaction, a composite nanometer material obtained through in situ polymerization of the polymerization molecules and low-dimensional carbon nanometer material, or a composite material obtained through non in situ polymerization of the conjugate microporous polymer obtained through polymerization of polymerization molecules and the low-dimensional carbon nanometer material. A three-dimensional nanopore carbon skeleton prepared in the invention has pore structures having high specific surface area and distributed uniformly, so that a rich electric conducting network and a good ion flow path are provided. The porous carbon nanometer material provided by the invention shows high specificcapacitance, high rate capability and good cycling stability in a super capacitor.

Description

technical field [0001] The invention belongs to the field of supercapacitors, and specifically relates to a porous carbon nanomaterial and its preparation method and application, in particular to a precursor based on a conjugated microporous polymer or a conjugated microporous polymer / low-dimensional carbon nanomaterial composite material. Nanomaterials prepared in bulk and supercapacitors using them. Background technique [0002] A supercapacitor is an electrochemical energy storage device with high power density. Its capacitance comes from the charge separation at the electrode-electrolyte interface, so its stored energy is mainly based on the adsorption of electrolyte ions in porous conductive electrodes with high specific surface area. . Compared with batteries, supercapacitors have higher power density, lower internal resistance, wider temperature range and longer cycle life. But its energy density is much lower than that of batteries. Therefore, it is very important...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/36H01G11/86B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/36H01G11/86Y02E60/13
Inventor 智林杰梁家旭肖志昌
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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