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Semi-hollow bicontinuous line-structure coaxial nanowire material in H2V3O8/graphene tube, as well as preparation method and application of material

A graphene tube, bicontinuous technology, applied in the fields of nanomaterials and electrochemistry, to achieve the effects of being conducive to market promotion, excellent electrochemical performance, and good cycle stability

Active Publication Date: 2013-12-25
安徽国芯新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But semi-hollow bicontinuous H 2 V 3 o 8 / Graphene tube midline structure coaxial nanowire material has not been reported yet

Method used

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  • Semi-hollow bicontinuous line-structure coaxial nanowire material in H2V3O8/graphene tube, as well as preparation method and application of material
  • Semi-hollow bicontinuous line-structure coaxial nanowire material in H2V3O8/graphene tube, as well as preparation method and application of material
  • Semi-hollow bicontinuous line-structure coaxial nanowire material in H2V3O8/graphene tube, as well as preparation method and application of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Semi-hollow double continuous H 2 V 3 o 8 The preparation method of coaxial nanowire material with wire structure in graphene tube, it comprises the steps:

[0051] One, the preparation of graphene dispersion liquid:

[0052] 1) Measure 1g of graphite powder and 23ml of concentrated sulfuric acid into a 250ml Erlenmeyer flask, and stir gently with a magnetic stirrer for 24 hours at room temperature;

[0053] 2) Turn on the constant temperature water bath and adjust the temperature of the water bath to 40°C. After the temperature is stable, put the Erlenmeyer flask into the water bath and stir for 5 minutes. Measure 100mg NaNO 3 Add to the dispersion obtained in step a), and stir for 5 minutes. Then measure 500mgKMnO 4 Slowly add the powder into the conical flask, keep the temperature of the dispersion below 45°C, and stir for 30 minutes;

[0054] 3) To the dispersion obtained in step b), add deionized water three times, add 3ml deionized water for the first two t...

Embodiment 2

[0074] One, the preparation of graphene dispersion liquid: same as embodiment 1;

[0075] Two, V 2 o 5 Preparation of sol: same as Example 1;

[0076] 3. V 2 o 5 Preparation of quantum dots / graphene composites:

[0077] 9) Take 1.1mmol of V 2 o 5 The sol is placed in a beaker, with aniline / V 2 o 5 Sol molar ratio is 0.03:1 ratio to V 2 o 5 Add 0.5mol / L aniline solution to the sol, and stir evenly;

[0078] 10) Add 16ml of graphene dispersion to the solution obtained in step 9), and add deionized water until the total volume of the solution is 60ml, and stir for 30 minutes;

[0079] 11) Sonicate the solution obtained in step 10) for 20 minutes to obtain a homogeneous solution;

[0080] 12) Transfer the homogeneous solution obtained in step 11) to a 100ml reactor, put it in a thermostat at 200°C for hydrothermal reaction, and the reaction time is 84 hours. After the reaction, take it out of the reactor and let it cool down to room temperature naturally;

[0081] 13)...

Embodiment 3

[0084] One, the preparation of graphene dispersion liquid: same as embodiment 1;

[0085] Two, V 2 o 5 Preparation of sol: same as Example 1;

[0086] 3. V 2 o 5 Preparation of quantum dots / graphene composites:

[0087] 9) Take 1.5mmol of V 2 o 5 The sol is placed in a beaker, with aniline / V 2 o 5 Sol molar ratio is 0.03:1 ratio to V 2 o 5 Add 0.5mol / L aniline solution to the sol, and stir evenly;

[0088] 10) Add 10ml of graphene dispersion to the solution obtained in step 9), and add deionized water until the total volume of the solution is 60ml, and stir for 30 minutes;

[0089] 11) Sonicate the solution obtained in step 10) for 20 minutes to obtain a homogeneous solution;

[0090] 12) Transfer the homogeneous solution obtained in step 11) to a 100ml reactor, and put it in a thermostat at 160°C for hydrothermal reaction. The reaction time is 12 hours. After the reaction, take it out of the reactor and cool it down to room temperature naturally;

[0091] 13) The...

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Abstract

The invention relates to a semi-hollow bicontinuous line-structure coaxial nanowire material in a H2V3O8 / graphene tube, a preparation method and application of the material. The nanowire material is formed by coating a H2V3O8 nanowire by self curling of graphene, a gap is formed between a H2V3O8 nanowire and graphene curl formed by self curling of the graphene, wherein the diameter of the H2V3O8 nanowire is 20-80nm. The nanowire material can be used as a positive electrode active material of a lithium ion battery. The nanowire material has the advantages of simple process, low cost and the like, and the battery formed by the electrode material has the characteristics of good cycling stability, excellent electrochemical performance under high current, and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, in particular to semi-hollow bicontinuous H 2 V 3 o 8 A coaxial nanowire material with a graphene tube centerline structure and a preparation method thereof, the material can be used as a positive electrode active material for a lithium ion battery. Background technique [0002] Since the beginning of the 21st century, energy problems have become increasingly prominent, and traditional resources such as coal and oil are increasingly depleted, causing serious pollution. However, electric energy has a wide range of sources, high efficiency, clean and pollution-free, but it is currently restricted by factors such as insufficient storage methods. To solve this problem, it is increasingly important to develop advanced energy storage devices. Recently, as an important component of energy storage devices, lithium-ion batteries are widely used in hybrid vehicles and portabl...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/583H01M4/48B82Y30/00B82Y40/00
CPCY02E60/10
Inventor 麦立强韩春华马鑫萸晏梦雨
Owner 安徽国芯新材料有限公司
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