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carbon backed tube cosno 3 Granular structure material and its preparation method and application

A technology of granular structure and nanostructure, applied in structural parts, electrical components, electrochemical generators, etc., can solve problems such as low tap density, and achieve improved tap density, high volume energy and power density, and simple process Effect

Active Publication Date: 2017-12-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some researchers have found that inorganic salt nanotube structures can be obtained by pyrolyzing PVA with different molecular weights. However, this hollow nanotube structure also has the problem of low tap density, which limits its further application.

Method used

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  • carbon backed tube cosno <sub>3</sub> Granular structure material and its preparation method and application
  • carbon backed tube cosno <sub>3</sub> Granular structure material and its preparation method and application
  • carbon backed tube cosno <sub>3</sub> Granular structure material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (CoSnO 3 (particles)@MnO@Mn 3 o 4 @C (Tube) Particle Nanomaterials in Tube)

[0031] 1) Weigh 700mg of CoSn(OH) 6 Nanoparticles were added to 20mL deionized water and ultrasonically dispersed for 10min to make them evenly dispersed, then 0.6g, 0.8g, 1.0g of high, medium and low molecular weight polyvinyl alcohol (PVA) and 1.5g of manganese acetate tetrahydrate were taken respectively, At the same time, add it to the above solution, and heat it in a water bath with magnetic stirring to dissolve it completely, forming an electrospinning solution with a certain viscosity;

[0032] 2) Add the electrospinning solution in step 1) to the injection, and perform electrospinning under the conditions of positive high voltage 12kV and negative high voltage ‐2kV, with a push speed of 0.02mm / min, and receive nanofibers with aluminum foil on the drum;

[0033] 3) Place the spun fiber obtained in step 2) in a 120°C oven for vacuum drying for 5 hours;

[0034] 4) The composite nano...

Embodiment 2

[0043] (CoSnO 3 (Particles) @CoO x @MnO x @C (tube) (Co:Mn=1:2) particle nanomaterial in tube)

[0044] 1) Weigh 700mg of CoSn(OH) 6 Nanoparticles were added to 20mL deionized water, and ultrasonically dispersed for 10min to make them uniformly dispersed, then 0.6g, 0.8g, 1.0g of high, medium and low molecular weight polyvinyl alcohol (PVA), 0.498g of cobalt acetate tetrahydrate and 0.980g of manganese acetate tetrahydrate was added to the above solution at the same time, and it was heated and magnetically stirred in a water bath to dissolve it completely, forming an electrospinning solution with a certain viscosity.

[0045] 2) Add the electrospinning solution in step 1) to the injection, and perform electrospinning under the conditions of positive high voltage 12kV and negative high voltage ‐2kV, with a push speed of 0.02mm / min, and receive nanofibers with aluminum foil on the drum;

[0046] 3) Place the spun fiber obtained in step 2) in a 120°C oven for vacuum drying fo...

Embodiment 3

[0050] (CoSnO 3 (Particles) @CoO x @MnO x @C (tube) (Co:Mn=2:1) ​​particle nanomaterial in tube)

[0051] 1) Weigh 700mg of CoSn(OH) 6 Nanoparticles were added to 20mL deionized water, and ultrasonically dispersed for 10min to make them uniformly dispersed, then 0.6g, 0.8g, 1.0g of high, medium and low molecular weight polyvinyl alcohol (PVA), 0.996g of cobalt acetate tetrahydrate and 0.491g manganese acetate tetrahydrate is added into the above-mentioned solution simultaneously, and it is heated and magnetically stirred in a water bath to make it all dissolve, forming an electrospinning solution with a certain viscosity;

[0052] 2) Add the electrospinning solution in step 1) to the injection, and perform electrospinning under the conditions of positive high voltage 12kV and negative high voltage ‐2kV, with a push speed of 0.02mm / min, and receive nanofibers with aluminum foil on the drum;

[0053] 3) Place the spun fiber obtained in step 2) in a 120°C oven for vacuum dryi...

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Abstract

The invention relates to a carbon-supported in-tube granule material with adjustable tube components. The carbon-supported in-tube granule material is in a hollow tube nano-structure which is supported by amorphous carbon and formed by metal oxide nanocrystal; amorphous square CoSnO<3> granules are arranged in the hollow tube nano-structure; the diameter of the hollow tube nano-structure is 180-220nm; and the particle sizes of the CoSnO<3> granules are 110-130nm. The carbon-supported in-tube granule material has the beneficial effects that the carbon-supported in-tube granule material demonstrates the electrochemical properties of high rate and good cycle performance as an energy storage material. CoSn(OH)<6> nano granules are added to an electrospinning solution for electrospinning; and the carbon-supported in-tube CoSnO<3> granule structure nanomaterial can be obtained by combination with later calcination. Meanwhile, the carbon-supported in-tube CoSnO<3> granule structure material has the characteristics of being simple in process, friendly to environment, available in raw materials and excellent in electrochemical properties.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials and electrochemical devices, and specifically relates to a carbon-supported granular material in a tube with adjustable tube components. The material can be used as a material for electrochemical energy storage devices. This strategy has certain promotion universality. Background technique [0002] In recent years, one-dimensional nanostructures, especially nanotubes, have aroused widespread interest among researchers due to their unique properties such as one-dimensional carrier-guided transport and small agglomeration, and have achieved excellent electrochemical performance. [0003] Metal oxides, especially multi-metal oxides, due to their high specific capacity (>700mAh g -1 ), low price, abundant raw materials, multivalent states and high activity, have been widely studied as ideal lithium-ion battery anode materials. However, there are some problems when it is used as a nega...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/62H01M4/583H01M4/52H01M10/0525
CPCH01M4/362H01M4/52H01M4/523H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 麦立强刘熊孟甲申牛朝江
Owner WUHAN UNIV OF TECH
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