Hollow SnO2/Co3O4 hybrid nanotube as well as preparation method and application thereof

A nanotube and hybridization technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of high requirements and narrow scope, and achieve uniform size, strong volume buffer capacity, high The effect of specific surface area

Inactive Publication Date: 2016-04-20
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, coaxial electrospinning technology has high requirements on equipment and spinning solution, and the range of spinning is relatively narrow

Method used

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  • Hollow SnO2/Co3O4 hybrid nanotube as well as preparation method and application thereof
  • Hollow SnO2/Co3O4 hybrid nanotube as well as preparation method and application thereof
  • Hollow SnO2/Co3O4 hybrid nanotube as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A hollow SnO 2 / Co 3 o 4 A method for preparing a hybrid nanotube, comprising the following steps:

[0042] 1) Preparation of electrospinning solution: cobalt nitrate as cobalt source, tin tetrachloride as tin source, polyvinylpyrrolidone (PVP) as working medium, organic solvent N,N-dimethylformamide (DMF) as dispersion agent, weigh 1g of PVP and put it into a beaker, add 10mL of DMF, stir magnetically at room temperature for 12h to dissolve the PVP, then weigh 0.5g of Co(NO 3 ) 2 ·6H 2 O and 0.5gSnCl 4 4H 2 0, slowly added in the transparent and clear PVP solution, continued magnetic stirring for 24h, and then the uniformly dispersed electrospinning solution obtained was packed into the sample tube of the electrospinning apparatus;

[0043] 2) Preparation of PVP nanofibers containing Co(II) and Sn(IV): The pore size of the electrospinning spinneret is 0.6 mm, and the loaded electrospinning needle is fixed, and the electrospinning surface is received on a flat pl...

Embodiment 2

[0047] Prepare hollow SnO according to the same method as in Example 1 2 / Co 3 o 4 Hybrid nanotubes, the difference is that the preparation method of the step (1) electrospinning solution of this embodiment is: using cobalt nitrate as the cobalt source, tin tetrachloride as the tin source, PVP as the working medium, and the organic solvent DMF as the dispersion agent, weigh 1g of PVP and put it into a beaker, add 10mL of DMF, stir magnetically at room temperature for 12h to dissolve the PVP, then weigh 0.3g of Co(NO 3 ) 2 ·6H 2 O and 0.3gSnCl 4 4H 2 O, slowly add to the transparent and clear PVP solution, continue magnetic stirring for 24h, and then put the obtained uniformly dispersed electrospinning solution into the sample tube of the electrospinning apparatus.

Embodiment 3

[0049] Prepare hollow SnO according to the same method as in Example 1 2 / Co 3 o 4 Hybrid nanotubes, the difference is that the preparation method of the step (1) electrospinning solution of this embodiment is: take cobalt nitrate as the cobalt source, tin tetrachloride as the tin source, PVP as the working medium, and the organic solvent DMF as the dispersant , Weigh 1g of PVP into a beaker, add 10mL of DMF, stir magnetically at room temperature for 12h to dissolve PVP, then weigh 0.4g of Co(NO 3 ) 2 ·6H 2 O and 0.4gSnCl 4 4H 2 O, slowly add to the transparent and clear PVP solution, continue magnetic stirring for 24h, and then put the obtained uniformly dispersed electrospinning solution into the sample tube of the electrospinning apparatus.

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Abstract

The invention discloses a hollow SnO2 / Co3O4 hybrid nanotube as well as a preparation method thereof. According to the method, an electrostatic spinning technique is adopted, a polymer is taken as a work medium, an organic solvent is taken as a dispersing agent, cobalt nitrate and tin tetrachloride are taken as precursors, polymer nanofibers containing uniformly distributed Co(II) and Sn(IV) are prepared, and then the hollow SnO2 / Co3O4 hybrid nanotube is prepared through sequential preoxidation and high-temperature calcination in an air atmosphere. Compared with preparation methods such as a template method, a coaxial electrostatic spinning method and the like, the method is simple and easy to implement and low in cost, the structure of the obtained hollow nanotube is controllable, and large-scale production can be realized. The hollow SnO2 / Co3O4 hybrid nanotube prepared with the method has the advantages of large specific surface area, multiple active sites, small density, high buffering capacity and the like; the hollow SnO2 / Co3O4 hybrid nanotube serving as a lithium ion battery anode material has excellent cycle performance and rate capability.

Description

technical field [0001] The invention relates to a lithium ion battery negative electrode material, in particular to a hollow SnO 2 / Co 3 o 4 The preparation method of hybrid nanotube, the hollow SnO prepared by this method 2 / Co 3 o 4 Hybrid nanotubes, and their application as anode materials for lithium-ion batteries. Background technique [0002] Compared with other rechargeable batteries, lithium-ion batteries have been widely used in various portable electronic devices due to their advantages such as high energy density, no memory effect, long cycle life, high working voltage, small self-discharge and no environmental pollution. In, such as mobile phones, notebook computers, digital cameras, etc. At present, commercial lithium-ion batteries use cheap and stable graphite-like carbon materials as the negative electrode, but its theoretical specific capacity (~372mAh g -1 ) is low, which hinders the further improvement of battery energy density and power density (Adv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/52H01M10/0525B82Y30/00B82Y40/00D01D5/00
CPCB82Y30/00B82Y40/00D01D5/003H01M4/364H01M4/48H01M4/52H01M10/0525Y02E60/10
Inventor 孙冬梅张京飞刘刚徐林唐亚文
Owner NANJING NORMAL UNIVERSITY
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