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porous graphene/mno 2 Coaxial nanowire with tube centerline structure and its preparation method and application

A technology of porous graphene and nanowires, applied in the field of nanomaterials and electrochemistry, to achieve the effects of improving stability, shortening ion diffusion distance, and uniform coating

Active Publication Date: 2017-07-11
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But porous graphene / MnO 2 Coaxial nanowire materials with tube centerline structure have not been reported yet

Method used

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  • porous graphene/mno <sub>2</sub> Coaxial nanowire with tube centerline structure and its preparation method and application
  • porous graphene/mno <sub>2</sub> Coaxial nanowire with tube centerline structure and its preparation method and application
  • porous graphene/mno <sub>2</sub> Coaxial nanowire with tube centerline structure and its preparation method and application

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Experimental program
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Embodiment 1

[0034] Porous graphene / MnO 2 A method for preparing a coaxial nanowire material with a centerline structure in a tube, comprising the steps of:

[0035] 1) Dissolve 1mmol potassium permanganate powder in 70mL deionized water, add 2mmol ammonium fluoride, stir at room temperature for 10-20 minutes, and stir well;

[0036] 2) Add 2ml graphene dispersion in proportion to the solution obtained in step 1), and stir for 10-15 minutes;

[0037] 3) Transfer the solution obtained in step 2) into a 100mL reactor, react at 180°C for 3 hours, take out the reactor, and cool to room temperature naturally;

[0038] 4) The product obtained in step 3) is soaked and reduced in 5mmol / L hydrazine hydrate for 2h and then taken out;

[0039] 5) Wash the product obtained in step 4) repeatedly with absolute ethanol, and dry to obtain porous graphene / MnO 2 Tube centerline structure coaxial nanowires.

[0040] The product porous graphene / MnO of this experiment invention 2 Take the coaxial nanowire...

Embodiment 2

[0046] 1) Dissolve 2mmol potassium permanganate powder in deionized water, add 2mmol ammonium fluoride, stir at room temperature for 10-20 minutes, and stir evenly;

[0047] 2) Add 2ml graphene dispersion in proportion to the solution obtained in step 1), and stir for 10-15 minutes;

[0048] 3) Transfer the solution obtained in step 2) into a 100mL reaction kettle, react at 180°C for 6 hours, take out the reaction kettle, and naturally cool to room temperature;

[0049] 4) The product obtained in step 3) is soaked and reduced in 10mmol / L hydrazine hydrate for 2h and then taken out;

[0050] 5) Wash the product obtained in step 4) repeatedly with absolute ethanol, and dry to obtain porous graphene / MnO 2 Tube centerline structure coaxial nanowires.

[0051] The coaxial nodal nanomaterial product of the present invention is assembled from porous graphene sheets and manganese dioxide nanowires, with a length of 10-40 microns and a diameter of 40-160 nanometers, wherein MnO 2 Th...

Embodiment 3

[0054] 1) Dissolve 2mmol potassium permanganate powder in deionized water, add 2mmol ammonium fluoride, stir at room temperature for 10-20 minutes, and stir evenly;

[0055] 2) Add 2ml graphene dispersion in proportion to the solution obtained in step 1), and stir for 10-15 minutes;

[0056] 3) Transfer the solution obtained in step 2) into a 100mL reaction kettle, react at 180°C for 6 hours, take out the reaction kettle, and naturally cool to room temperature;

[0057] 4) The product obtained in step 3) is soaked and reduced in 10mmol / L hydrazine hydrate for 2h and then taken out;

[0058] 5) Wash the product obtained in step 4) repeatedly with absolute ethanol, and dry to obtain porous graphene / MnO 2 Tube centerline structure coaxial nanowires.

[0059] The coaxial nodal nanomaterial product of the present invention is assembled from porous graphene sheets and manganese dioxide nanowires, with a length of 10-40 microns and a diameter of 40-160 nanometers, wherein MnO 2 Th...

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Abstract

The invention relates to a coaxial nanometer wire with a porous graphene / MnO2 pipe and a middle line structure, a preparation method of the coaxial nanometer wire and an application of the coaxial nanometer wire. The material can be regarded as a positive-electrode active material of an electrochemical super-capacitor. The material is formed by cladding a MnO2 nanometer wire with a porous graphene pipe, the length is 10-40 micrometers and the diameter is 40-160 micrometers, wherein the diameter of the MnO2 nanometer wire is 30-80 micrometers, and the porous graphene pipe is formed by curling a graphene sheet and provided with different-extent mesoporous structures. The coaxial nanometer wire is relatively high in specific capacity, and excellent in cyclic performance and steadiness and electrochemical performance under high current charge-discharge conditions; secondly, the coaxial nanometer wire is simple in process, after simple hydro-thermal treatment is performed, the coaxial nanometer wire material with the middle line structure and the porous graphene / MnO2 pipe is low in power consumption. The mass of the used graphene only accounts for 2.2% of the total mass, thus the coaxial nanometer wire material is good for marketization and popularization.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, in particular to porous graphene / MnO 2 A coaxial nanowire material with a tube centerline structure and a preparation method thereof, the material can be used as the positive electrode active material of an electrochemical supercapacitor. Background technique [0002] With the advancement of science and technology, the development of social economy and the rapid growth of population, the consumption of energy is also increasing. The depletion of non-renewable resources urgently requires renewable resources to play their role as substitutes, and at the same time requires the sustainable development of non-renewable resources. , effective use, and give full play to its potential. The existing traditional energy system can no longer meet the needs of the development of modern industry, agriculture, forestry, etc. Fuel and coal resources are not only non-renewable, but als...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/36H01G11/86B82Y30/00B82Y40/00
CPCY02E60/13
Inventor 麦立强胡平双逸晏梦雨
Owner WUHAN UNIV OF TECH
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