Method for preparing G/Sn/PAN-base carbon nanometer fiber membrane

A technology of carbon nanofibers and nanofiber membranes, which is applied in fiber processing, filament/thread forming, textiles and papermaking, etc., can solve the problems of battery capacity attenuation and achieve excellent conductivity, simple preparation method and high porosity Effect

Inactive Publication Date: 2014-04-30
ZHEJIANG SANZHI TEXTILES
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  • Application Information

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Problems solved by technology

However, during the process of intercalation and deintercalation of lithium ions, the huge volume change causes the tin negative electrode to be cracked and crushed, which eventually leads to a sharp decline in battery capacity.

Method used

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  • Method for preparing G/Sn/PAN-base carbon nanometer fiber membrane
  • Method for preparing G/Sn/PAN-base carbon nanometer fiber membrane
  • Method for preparing G/Sn/PAN-base carbon nanometer fiber membrane

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Embodiment 1

[0029] refer to figure 1 , the flow process of the method for preparing G / Sn / PAN-based carbon nanofiber film in the present invention mainly comprises the following steps:

[0030] (1) Use an electronic balance to weigh a certain amount of G / Sn / PAN powder (the mass ratio of G, Sn, and PAN is 1:3:16, and the mass fraction of PAN is 8%) and place it in a 20ml sample bottle. Pipette 10ml of N-N dimethylformamide (DMF) into the liquid tube, seal the sample bottle with raw material tape, heat to 60°C and stir for 24 hours to finally obtain a relatively uniformly dispersed solution.

[0031] (2) Use an electrospinning device for electrospinning, cut out tinfoil paper with an area of ​​40cm×40cm and stick it on the flat collector, take 5ml of the spinning solution sample and put it into the injection needle, connect the positive electrode of the high voltage generator with the spray Connect the wire port, connect the negative electrode to the plate receiver, adjust the flow rate of ...

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Abstract

The invention discloses a method for preparing a G/Sn/PAN-base carbon nanometer fiber membrane. The method for preparing the G/Sn/PAN-base carbon nanometer fiber membrane includes: 1) preparing spinning solution, to be more specific, weighing polyacrylonitrile, nanometer tin powder and graphene nanometer film according to certain mass ratio, blending and dissolving in N-N dimethyl formamide, and stirring to obtain the uniformly dispersed electrostatic spinning solution; b) electrostatic spinning, to be more specific, carrying out electrostatic spinning on the electrostatic spinning solution of the step a) to obtain a graphene/tin/polyacrylonitrile nanometer fiber membrane; c) pre-oxidizing, to be more specific, pre-oxidizing the graphene/tin/polyacrylonitrile nanometer fiber membrane of the step b) in air atmosphere to obtain the pre-oxidized nanometer fiber membrane; d) carbonizing, to be more specific, carbonizing the pre-oxidized nanometer fiber membrane in argon atmosphere to obtain the G/Sn/PAN-base carbon nanometer fiber membrane. The method for preparing the G/Sn/PAN-base carbon nanometer fiber membrane is easy to operate, the graphene coats the nanometer fiber well; the G/Sn/PAN-base carbon nanometer fiber membrane has advantages of large specific surface area, high porosity, and high electrical conductivity and so on, and has broad expanding space.

Description

【Technical field】 [0001] The invention relates to the preparation of graphene / Sn / PAN-based carbon nanofiber membranes by electrospinning and carbonization methods, and belongs to the technical field of preparation of functional nanofibers. 【Background technique】 [0002] Electrospinning technology is based on the principle of high-speed injection of conductive fluid under high-voltage electric field. A potential difference is generated instantaneously between the capillary spinneret and the ground electrode, so that the solution or melt in the capillary can overcome its own surface tension and viscoelastic force, The end of the silk head presents a hemispherical droplet. As the electric field strength increases, the droplet is pulled into a conical shape called Taylor cone. When the electric field strength exceeds a certain critical value, it will overcome the surface tension of the droplet to form a jet, further accelerate in the electric field, reduce the diameter, stretc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/4242D01D5/00D06C7/04
Inventor 胡毅张声诚丁云法沈桢
Owner ZHEJIANG SANZHI TEXTILES
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