Porous carbon nano-tube flexible battery material containing nano-silicon and preparation method thereof

A flexible battery and flexible material technology, applied in the direction of secondary batteries, battery electrodes, active material electrodes, etc., to achieve the effect of increasing the specific surface area, reducing the transmission distance, and controlling the shape

Active Publication Date: 2019-03-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the uniform dispersion of nano-silicon particles in carbon nanotubes.

Method used

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  • Porous carbon nano-tube flexible battery material containing nano-silicon and preparation method thereof
  • Porous carbon nano-tube flexible battery material containing nano-silicon and preparation method thereof
  • Porous carbon nano-tube flexible battery material containing nano-silicon and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]First, 0.25g of silane coupling agent HK560 and 0.5g of fumed silica (with a particle size of 50-500nm) were refluxed in 100mL of ethanol at 90°C for 4 hours for surface modification treatment; then 1.15g of polyacrylonitrile, 0.05 Add g polymethyl methacrylate to 10mL organic solvent N,N dimethylformamide, heat and stir at 60°C for 60min until dissolved; then add surface-modified fumed silica particles, and disperse evenly by ultrasonic to obtain spinning silk slurry; after the above-mentioned spinning solution is removed from the small vacuoles, pass through a high-voltage electrospinning machine at 20KV, the needle point and the receiving device (the receiving device is a zigzag receiving device, and its structural diagram is as follows: figure 1 As shown, it is composed of a zigzag receiving plate 02 made of aluminum or copper supported by a polymethyl methacrylate (PMMA) substrate 01 , and the inclination angle θ of the zigzag receiving plate 02 to the horizontal dir...

Embodiment 2

[0040] First, 0.5g of silane coupling agent HK560 and 0.5g of water glass hydrolyzed silica (with a particle size of 50-500nm) were refluxed in 100mL of ethanol at 90°C for 4 hours for surface modification treatment; then 1.15g of polyacrylonitrile , Add 0.1g polymethyl methacrylate to 10mL organic solvent N,N dimethylformamide, heat and stir at 60°C for 60min until dissolved; then add surface-modified water glass hydrolyzed silica particles, and ultrasonically Disperse to obtain the spinning slurry; after the above-mentioned spinning solution is removed from the small bubbles, pass through the high-voltage electrospinning machine at 20KV, the needle point and the receiving device (the receiving device is a zigzag receiving device, and its structural diagram is as follows: figure 1 and figure 2 As shown), the distance of 25cm, the blunt needle pushing speed of 0.035ml / min, the humidity of the spinning process is 35% to 40%, and the temperature of the spinning process is 20 to...

Embodiment 3

[0043] First, 1g of silane coupling agent HK560 and 0.5g of tetraethyl orthosilicate hydrolyzed silica (particle size 50-500nm) were refluxed in 100mL of ethanol at 90°C for 4 hours for surface modification treatment; then 1.15g of poly Add acrylonitrile and 0.12g polylactic acid to 10mL organic solvent N,N dimethylformamide, heat and stir at 60°C for 60min until dissolved; then add surface-modified ethyl orthosilicate hydrolyzed silica particles, ultrasonic Uniformly disperse to obtain spinning slurry; after the above-mentioned spinning solution is removed from small bubbles, pass through a high-voltage electrospinning machine at 20KV, the needle point and the receiving device (the receiving device is a zigzag receiving device, and its structural diagram is as follows: figure 1 and figure 2 As shown), the distance of 25cm, the blunt needle pushing speed of 0.035ml / min, the humidity of the spinning process is 35% to 40%, and the temperature of the spinning process is 20 to 25...

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Abstract

The invention belongs to the field of lithium ion batteries, and discloses a porous carbon nano-tube flexible battery material containing nano-silicon, as well as preparation and application thereof.The preparation method comprises the following steps: adding polyacrylonitrile, a pore forming material and surface modified silicon-source particles into an organic solvent, heating, stirring, performing ultrasonic mixing, and uniformly dispersing to obtain spinning slurry; preparing a nano-fiber membrane with oriented fibers through electrostatic spinning; pre-oxidizing and carbonizing under aninert atmosphere to obtain a porous carbon nano-tube flexible material containing silicon source containing particles; and mixing with magnesium powder, and performing magnesiothermic reduction reaction under the inert atmosphere to obtain the porous carbon nano-tube flexible battery material containing nano-silicon. The porous carbon nano-tube flexible battery material containing nano-silicon hasthe advantages of good flexibility, good conductivity, large specific surface area and the like, and has great application potential when being applied to lithium ion battery cathode with wide temperature range.

Description

technical field [0001] The invention belongs to the field of lithium-ion battery materials, and in particular relates to a porous carbon nanotube flexible battery material containing nano-silicon and a preparation method thereof. Background technique [0002] In response to unsustainable energy consumption and deteriorating environment, the implementation of new energy strategies has become the consensus of the public. Due to its high energy density, no memory effect and excellent cycle performance, rechargeable lithium-ion batteries have been widely used in various micro-sized mobile terminal devices. However, for many fields, such as new energy vehicles, large-scale energy storage power stations, and air transportation, the existing graphite anode materials for lithium-ion battery systems cannot meet the practical requirements of high power. Silicon-based anode materials have attracted widespread attention due to their high theoretical capacity (4200mAh / g). In addition, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/0525D01D5/00D04H1/43D04H1/728D06C7/04
CPCH01M4/364H01M4/386H01M4/625H01M10/0525D01D5/003D01D5/0076D01D5/0092D04H1/43D04H1/728D06C7/04H01M2004/027Y02E60/10
Inventor 吴松平夏琪严玉蓉续安鼎张申魁陈焯文黄楚云
Owner SOUTH CHINA UNIV OF TECH
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