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A kind of activated carbon microsphere and preparation method thereof

A technology of activated carbon microspheres and micropores, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as insufficient performance, and achieve the effects of low cost, large diameter and excellent impedance performance

Active Publication Date: 2017-09-29
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is to overcome the deficiencies in the performance of existing materials, to provide a kind of activated carbon microspheres with high specific surface area and large diameter and its preparation method. 3 N 4 Synthesis of Activated Carbon Microspheres Using Quantum Dots as Templates

Method used

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  • A kind of activated carbon microsphere and preparation method thereof
  • A kind of activated carbon microsphere and preparation method thereof
  • A kind of activated carbon microsphere and preparation method thereof

Examples

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Embodiment 1

[0031] (1) Material preparation: refer to previous studies (“Polymer Nanodots of Graphic Carbon Nitrideas Effective Fluorescent Probes for the Detection of Fe 3+ and Cu 2+ ions"Nanoscale, 2014,6(8):4157-62), preparation of g-C 3 N 4 Quantum dots; configure 1mol / L glucose solution;

[0032] (2) Hydrothermal: get the g-C prepared in step (1) 3 N 4 Mix 0.1 g of quantum dots with 45 mL of the glucose solution prepared in step (1), heat the mixed solution in water at 180° C. for 10 h, then take it out and cool it down to obtain a carbon gel;

[0033] (3) Washing: take the carbon gel obtained in step (2) and wash it twice with water, then wash it three times with ethanol, and take the washing solution as the clean standard; dry the cleaned carbon gel at 90°C 24h to remove moisture;

[0034](4) Carbonization: Take the dried carbon gel in step (3), put it in a tube furnace for carbonization under the protection of nitrogen, the carbonization temperature is 800°C, the heating rat...

Embodiment 2

[0050] The only difference from Example 1 is that in this example g-C 3 N 4 Quantum dot quality is 0.05g, i.e. g-C used in step (2) 3 N 4 Quantum dot quality is 0.05g, other is the same as embodiment 1.

[0051] The glucose-based activated carbon microspheres obtained in this example have a diameter of 3-10 μm and a specific surface area of ​​1006 m 2 g -1 , with a nitrogen content of 2.6%, 2Ag -1 When the mass specific capacity of the supercapacitor is 221F g -1 .

Embodiment 3

[0053] The only difference from Example 1 is that in this example g-C 3 N 4 Quantum dot quality is 0.2g, namely step (2) in g-C 3 N 4 Quantum dot quality is 0.2g, other is the same as embodiment 1.

[0054] The glucose-based activated carbon microspheres obtained in this example have a diameter of 3-10 μm and a specific surface area of ​​1048 m 2 g -1 , with a nitrogen content of 3.1%, 2Ag -1 When the mass specific capacity of supercapacitor is 193F g -1 .

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Abstract

An activated carbon microsphere and a preparation method thereof. The activated carbon microsphere of the present invention has a diameter of 3-10 microns, a specific surface area of ​​803-1109 m2 g-1, pores mainly micropores, and a nitrogen doping amount of 2.0-6.6%. The present invention also includes the preparation method of the activated carbon microspheres. The invention has simple process and low cost, and the used template and nitrogen-doped reagent are g-C3N4 quantum dots, which can be easily removed by high temperature. The obtained activated carbon has high yield, high specific surface area, good impedance performance of the supercapacitor, high degree of graphitization, and good specific capacitance performance of the supercapacitor.

Description

technical field [0001] The invention relates to an activated carbon microsphere and a preparation method thereof, belonging to the field of activated carbon materials. Background technique [0002] Electrode material is an important factor limiting the performance of supercapacitors. Activated carbon has the advantages of good conductivity, high specific surface area, electrochemical stability, porous structure, long cycle life, large specific capacitance and relatively low cost ("Anactivated carbon with high capacity from carbonization of a resorcinol-formaldehyde resin” Electrochemistry Communications, 2009, 11:715-718), so it has attracted the attention of most scholars. The electrochemical performance of activated carbon electrode materials is mainly controlled by the type of precursor and the method of material activation, while the capacitive performance of the material is controlled by the pore size distribution, specific surface area, electrical conductivity and some...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/336C01B32/318H01G11/24H01G11/34
CPCY02E60/13
Inventor 楚增勇颜廷楠刘恩辉蒋振华李公义李义和李效东
Owner NAT UNIV OF DEFENSE TECH
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