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Multi-level N-doped carbon nano-rod composite material and preparation method thereof

A technology of carbon nanorods and composite materials, applied in the field of material chemistry, can solve problems such as poor cycle performance, lower rate performance and power density, poor conductivity, etc., and achieve good capacitance performance, large specific surface area, and wide application prospects.

Inactive Publication Date: 2018-08-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Pseudocapacitive electrode materials have higher specific capacitance and energy density than carbon materials, but their poor conductivity reduces their rate performance and power density, and their cycle performance is also worse than carbon materials.

Method used

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  • Multi-level N-doped carbon nano-rod composite material and preparation method thereof
  • Multi-level N-doped carbon nano-rod composite material and preparation method thereof
  • Multi-level N-doped carbon nano-rod composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] In this embodiment, the steps of the method for preparing the multi-level N-doped carbon nanorod composite material are as follows:

[0030] (1) Preparation of Zn(BTC) precursor:

[0031] (a) Add 0.4585g zinc acetate dihydrate to 4.22ml deionized water, stir until a colorless and transparent solution is formed, wherein [Zn 2+ ]=0.495mol / L;

[0032] (b) Dissolve 0.2625g of trimesic acid in 8.34ml of absolute ethanol, stir until a colorless and transparent solution is formed, wherein [BTC 3- ]=0.150mol / L;

[0033] (c) During the stirring process, add the solution of (b) dropwise to the solution obtained in (a), after ultrasonication for 10 minutes, transfer the reactant to a hydrothermal kettle, keep it at 175°C for 24 hours, and then cool to room temperature ;

[0034] (d) The product was collected by centrifugation, washed with absolute ethanol, and then dried at 200° C. for 2 h;

[0035] (2) Preparation of ZnO@C template: put the Zn(BTC) precursor into a tube furn...

Embodiment 2

[0043] In this embodiment, the steps of the method for preparing the multi-level N-doped carbon nanorod composite material are as follows:

[0044] (1) Preparation of Zn(BTC) precursor:

[0045] (a) Add 0.4585g zinc acetate dihydrate to 4.22ml deionized water, stir until a colorless and transparent solution is formed, wherein [Zn 2+ ]=0.495mol / L;

[0046] (b) Dissolve 0.525g of trimesic acid in 8.34ml of absolute ethanol, stir until a colorless and transparent solution is formed, wherein [BTC 2- ]=0.2996mol / L;

[0047] (c) During the stirring process, the solution of (b) was added dropwise to the solution obtained in (a), and after ultrasonication for 10min, the reactant

[0048] Move to a hydrothermal kettle, keep warm at 175°C for 24h, then cool to room temperature;

[0049] (d) The product was collected by centrifugation, washed with absolute ethanol, and then dried at 200° C. for 2 h;

[0050] (2) Preparation of ZnO@C template: put the Zn(BTC) precursor into a tube fu...

Embodiment 3

[0058] In this embodiment, the steps of the method for preparing the multi-level N-doped carbon nanorod composite material are as follows:

[0059] (1) Preparation of Zn(BTC) precursor:

[0060] (a) Add 0.4585g zinc acetate dihydrate to 4.22ml deionized water, stir until a colorless and transparent solution is formed, wherein [Zn 2+ ]=0.495mol / L;

[0061] (b) Dissolve 0.63g of trimesic acid in 8.34ml of absolute ethanol and stir until a colorless and transparent solution is formed, wherein [BTC 2- ]=0.359mol / L;

[0062] (c) During the stirring process, add the solution of (b) dropwise to the solution obtained in (a), after ultrasonication for 10 minutes, transfer the reactant to a hydrothermal kettle, keep it at 175°C for 24 hours, and then cool to room temperature ;

[0063] (d) The product was collected by centrifugation, washed with absolute ethanol, and then dried at 200° C. for 2 h;

[0064] (2) Preparation of ZnO@C template: put the Zn(BTC) precursor into a tube fur...

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Abstract

The invention discloses a multi-level N-doped carbon nano-rod composite material and a preparation method thereof. The preparation method comprises the specific steps of: (1), synthesizing a zinc-containing metal-organic framework (Zn(BTC)) precursor by taking zinc acetate dihydrate as the zinc source and trimesic acid as the organic ligand; (2), roasting at high temperature, so that a carbon nano-rod composite material loaded with ZnO is obtained; (3), performing in-situ growth of a metal-organic framework frame ZIF-8 on a carbon nano-rod by taking 2-methylimidazole as the organic ligand andthe ZnO in the material as the zinc source; and (4), carbonizing at high temperature in an inert environment, and performing acid pickling in diluted hydrochloric acid, so that an N-doped porous carbon nano-rod material derived by the two-level composite metal-organic framework is obtained. The composite material has better capacitive performance; and, in 6 mol / L of KOH electrolyte, when the current density is 1.25 A / g, the maximum of the specific capacitance is 163 F / g.

Description

technical field [0001] The invention belongs to the field of material chemistry, in particular to the preparation of an N-doped carbon nanorod composite material and its application in the field of supercapacitors Background technique [0002] Since the 21st century, with the rapid development of the industrial level, material needs have become more and more abundant, leading to the gradual depletion of fossil fuels. Therefore, the development and utilization of green and sustainable energy has become a problem that has attracted much attention and needs to be solved urgently. Therefore, electrochemical energy storage devices such as supercapacitors have attracted more and more attention and attention from the scientific and industrial circles. [0003] As a new type of energy storage device, supercapacitors have the characteristics of fast charging and discharging, long service life, high efficiency, wide temperature range, good cycle stability, and high safety. There are...

Claims

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Application Information

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IPC IPC(8): H01G11/36H01G11/86
CPCY02E60/13H01G11/36H01G11/86
Inventor 刘毅朱伟伟赵蓉
Owner ZHEJIANG UNIV
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