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A carbon nanotube@nickel manganate core-shell heterostructure material, its preparation method and application

A carbon nanotube and heterostructure technology, applied in the field of nanomaterials, can solve the problems of low energy density and power density, difficult application requirements, short cycle time, etc., and achieve high energy density and power density, good cycle stability , The effect of low production cost

Inactive Publication Date: 2017-05-10
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, it is found that these traditional electrode materials have more or less their own defects, such as: small active area, poor conductivity, low capacitance, short cycle time, low energy density and power density, due to The existence of these defects makes it difficult to meet the higher application requirements in reality

Method used

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  • A carbon nanotube@nickel manganate core-shell heterostructure material, its preparation method and application
  • A carbon nanotube@nickel manganate core-shell heterostructure material, its preparation method and application
  • A carbon nanotube@nickel manganate core-shell heterostructure material, its preparation method and application

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Embodiment 1

[0025] A method for preparing a carbon nanotube@nickel manganate core-shell heterostructure material, comprising the following steps:

[0026] a. The carbon nanotubes are treated by reflux of nitric acid with a mass concentration of 60%, then washed with double distilled water until the pH is neutral, and then left to stand for a period of time. After all the precipitation, the supernatant is poured out, and then vacuum pumping Filter and dry to get pure carbon nanotubes;

[0027] b. Accurately weigh 0.01 g of the above-mentioned carbon nanotubes and mix them with 20 ml of twice-distilled water, and stir them for 1 hour under a magnetic stirrer with a rotating speed of 3000 r / s to form a uniformly mixed solution;

[0028] c. Add 0.5mmol of nickel chloride and 1mmol of potassium permanganate to the above and mix well, stir for 2 hours to obtain a mixed solution, transfer it to a reaction kettle, seal the reaction kettle, react at 100°C for 6 hours, cool to room temperature, cen...

Embodiment 2

[0034] A method for preparing a carbon nanotube@nickel manganate core-shell heterostructure material, comprising the following steps:

[0035] a. The carbon nanotubes are treated by reflux of nitric acid with a mass concentration of 60%, then washed with double distilled water until the pH is neutral, and then left to stand for a period of time. After all the precipitation, the supernatant is poured out, and then vacuum pumping Filter and dry to get pure carbon nanotubes;

[0036] b. Accurately weigh 0.008g of the above-mentioned carbon nanotubes and mix them with 20ml of twice-distilled water, and stir them for 1 hour under a magnetic stirrer with a rotating speed of 3000r to form a uniformly mixed solution;

[0037] c. Add 0.6mmol of nickel chloride and 1.5mmol of potassium permanganate in sequence to the above and mix evenly, stir for 2 hours to obtain a mixed solution, transfer it to a reaction kettle, seal the reaction kettle, react at 100°C for 4 hours, cool to room temp...

Embodiment 3

[0040] A method for preparing a carbon nanotube@nickel manganate core-shell heterostructure material, comprising the following steps:

[0041] a. The carbon nanotubes are processed by nitric acid reflux, then washed with double distilled water until the pH is neutral, and then left to stand for a period of time. After all the precipitation, the supernatant is poured out, and then vacuum filtration and drying are carried out. Pure carbon nanotubes can be obtained;

[0042] b. Accurately weigh 0.015g of the above-mentioned carbon nanotubes and mix them with 20ml of double-distilled water, and perform magnetic stirring for 1h at a magnetic stirrer speed of 3000r / s to form a uniformly mixed solution;

[0043] c. Add 0.8mmol of nickel chloride and 2mmol of potassium permanganate in sequence to the above mixture, stir for 2 hours to obtain a mixed solution, transfer it to a reactor, seal the reactor, react at 80°C for 6 hours, cool to room temperature, centrifuge and wash , that is...

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Abstract

The invention discloses carbon nano-tube @ nickel manganese core-shell heterostructure material, and a preparation method and application thereof. The preparation method includes: in a closed high-temperature high-pressure reactor, using secondary distillate as reaction solvent, adding nickel chloride and potassium permanganate, mixing them well, and generating a high-pressure environment through a heating reaction system to prepare the material. Compared with the prior art, the carbon nano-tube @ nickel manganese core-shell heterostructure material and the preparation method and application thereof have the advantages that products of the preparation method are high in purity, good in dispersity, good in crystal shape and well controllable, production cost is low, and reproducibility is good; after used to modify a copper sheet, electrode material for a supercapacitor is directly made, good cycling stability, high specific capacitance and high energy density and power density are achieved, and the material has potential value of application in energy storage.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and specifically relates to a carbon nanotube@nickel manganate core-shell heterostructure material, a preparation method and an application thereof. Background technique [0002] With the rapid development of science and technology and the upgrading of electronic products, the research on supercapacitor electrode materials has aroused great interest of researchers. At present, the traditional supercapacitor electrode materials mainly include the following categories: carbon material electrode materials, conductive polymer electrode materials, and metal oxide electrode materials. However, in practical applications, it is found that these traditional electrode materials have more or less their own defects, such as: small active area, poor conductivity, low capacitance, short cycle time, low energy density and power density, due to The existence of these defects makes it difficult to meet the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86
CPCY02E60/13
Inventor 张小俊南红红马文勤
Owner ANHUI NORMAL UNIV