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Method for preparing high-specific-surface-area and high-specific-capacitance carbon fibers by random copolymers

A high specific surface area, random copolymer technology, used in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc., can solve the problems of unstable copolymer structure and low carbon yield, and achieve environmental pollution, recycling The effect of long life and high energy density

Active Publication Date: 2016-08-17
YANGZHOU UNIV
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  • Application Information

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Problems solved by technology

[0004] Defects in the preparation of high-capacitance carbon fibers in the prior art: carbon fiber is a fibrous activated carbon material, which is mainly obtained by low-temperature pre-oxidation of precursor fibers, and then combined with high-temperature carbonization
At present, there are two main problems in the preparation of carbon fibers: 1. At the carbonization temperature, the structure of the linearly assembled copolymer is unstable; 2. The carbon yield of most copolymers is low.

Method used

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  • Method for preparing high-specific-surface-area and high-specific-capacitance carbon fibers by random copolymers
  • Method for preparing high-specific-surface-area and high-specific-capacitance carbon fibers by random copolymers
  • Method for preparing high-specific-surface-area and high-specific-capacitance carbon fibers by random copolymers

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Experimental program
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Embodiment Construction

[0025] 1. Preparation of spinning fibers:

[0026] Add 12.1g of acrylonitrile, 1.34g of acrylic acid, and 47.3g of dimethyl sulfoxide (DMSO) into a three-necked flask, then add 0.61g of azobisisobutyronitrile (AIBN), stir well and blow nitrogen for 20 minutes, and heat to 60 °C. After 12 h of reaction, acrylonitrile-acrylic acid copolymer P(AN-co-AA) was prepared.

[0027] Take 0.6 g of acrylonitrile-acrylic acid copolymer P (AN-co-AA) and dissolve it in 5.4 g of DMF solvent, and stir it thoroughly for 12 h to obtain a spinning solution with a mass fraction of 10%.

[0028] Electrospinning operation: use a syringe to draw an appropriate amount of spinning liquid, and install a spinning needle on the top of it, and connect it to the positive pole of the power supply. Receive it with aluminum foil, and connect it to the receiving plate as the negative pole. The flow rate of the spinning solution, that is, the advancing speed of the syringe, is controlled by a micro-syringe pum...

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Abstract

The invention belongs to the technical field of sustainable energy sources and discloses a method for preparing high-specific-surface-area and high-specific-capacitance carbon fibers by random copolymers. The method includes: dissolving acrylonitrile acrylate copolymer into N,N- dimethyl formamide to obtain a spinning solution, using the spinning solution for preparing acrylonitrile-acrylate copolymer nanofibers according to an electrospinning method, and performing pre-oxidization and carbonization to obtain polyacrylonitrile-based copolymer carbon fibers; mixing the polyacrylonitrile-based copolymer carbon fibers with KOH aqueous solution, and activating to obtain the high-specific-surface-area and high-specific-capacitance carbon fibers. The method has advantages of technical simplicity, adjustability of spinning fibers, environment friendliness and the like. A supercapacitor is an energy storage element between a traditional capacitor and a battery and has advantages of high power density, high energy density, quickness in charging and discharging and long cycle life.

Description

technical field [0001] The invention belongs to sustainable energy technology, and specifically relates to the technical field of production of supercapacitors. Background technique [0002] Electrospinning technology is a fast, continuous, simple and effective method to obtain nanometer to several micrometer-sized fibers. Spinning fiber has the characteristics of simple process, adjustable fiber diameter, high specific surface area and porosity. Therefore, it is widely used in biological tissue engineering, gas-liquid filtration, sensing materials and other fields. During the electrospinning process, the polymer solution or melt accumulates charges under the action of a high-voltage electric field, and the electric field stretching force gradually exceeds the surface tension of the polymer liquid, and the polymer solution is sprayed, stretched and cooled with the solvent volatilization or melt Gradually solidified into silk, nanofibers are obtained at the receiving end. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/40
CPCY02E60/13H01G11/86H01G11/40
Inventor 薛怀国徐浩宋欣徐梦娇
Owner YANGZHOU UNIV
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