Preparation method and application of conducting polymer-based nanometer carbon fibers

A technology of conductive polymers and nano-carbon fibers, which can be used in the fields of fiber chemical characteristics, circuits, capacitors, etc., and can solve problems such as high cost, unfavorable, complicated process, etc.

Inactive Publication Date: 2011-10-19
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current preparation method has complex technological process and high cost, which is not conducive to the realization of industrialization

Method used

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  • Preparation method and application of conducting polymer-based nanometer carbon fibers
  • Preparation method and application of conducting polymer-based nanometer carbon fibers
  • Preparation method and application of conducting polymer-based nanometer carbon fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Pre-oxidize 1 g of conductive polyaniline nanofibers in an air atmosphere at 200°C for 4 hours to obtain a pre-oxidized product; then put the pre-oxidized product into a high-temperature carbonization furnace and heat it under a nitrogen atmosphere with a heating rate of 1°C. min -1 , from room temperature to 600 ° C for 2 hours, that is, conductive polymer-based carbon nanofibers.

[0017] as attached figure 1 The morphology of polyaniline-based carbon fibers shown by scanning electron microscopy (SEM) remained intact.

[0018] as attached figure 2 The results of electrochemical performance test show that the electrode material is at 0.1A·g -1 The discharge specific capacity under the current density can reach 130F·g -1 ; at 1A g -1 After 100 cycles at current density, the discharge specific capacity can maintain 110F·g -1 .

Embodiment 2

[0020] Pre-oxidize 1 g of conductive polypyrrole nanofibers in a carbon dioxide atmosphere at 300 °C for 3 h to obtain a pre-oxidized product; then put the pre-oxidized product into a high-temperature carbonization furnace and heat it under a nitrogen atmosphere with a heating rate of 1 °C. min -1 , from room temperature to 700 ° C for 1 hour, that is, conductive polymer-based carbon nanofibers.

[0021] as attached figure 2 The results of electrochemical performance test show that the electrode material is at 0.1A·g -1 The discharge specific capacity under the current density can reach 158F·g -1 ;1A·g -1 After 100 cycles at current density, the discharge specific capacity can maintain 110F·g -1 .

Embodiment 3

[0023] Pre-oxidize 1 g of conductive polythiophene nanofibers in a carbon dioxide atmosphere at 400 °C for 2 h to obtain a pre-oxidized product; then put the pre-oxidized product into a high-temperature carbonization furnace and heat it under a nitrogen atmosphere with a heating rate of 1 °C. min -1 , from room temperature to 850 ° C for 1 hour, that is, conductive polymer-based carbon nanofibers.

[0024] as attached figure 2 The results of electrochemical performance test show that the electrode material is at 0.1A·g -1 The discharge specific capacity under the current density can reach 132F·g -1 ;1A·g -1 After 100 cycles at current density, the discharge specific capacity can maintain 123F·g -1 .

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Abstract

The invention provides a method for preparing conducting polymer-based nanometer carbon fibers, which comprises the following steps of: processing a conducting polymer nanometer fiber precursor in the oxidizing atmosphere to obtain a preoxidation product; and carbonizing at the temperature of between 600 and 900 DEG C in the nitrogen atmosphere to obtain the conducting polymer nanometer carbon fibers, wherein in the electrode material, the stable specific electric capacity is up to 158F/g under the condition of current density of 0.1A/g; and when the current density is gradually increased from 0.1A/g to 1A/g, the retention rate of the capacity is 75 percent. The conducting polymer-based nanometer carbon fibers have high discharge specific capacity and cyclical stability.

Description

technical field [0001] The invention relates to the field of supercapacitor electrode materials, in particular to a preparation method and application of conductive polymer-based carbon nanofibers. Background technique [0002] Supercapacitor (supercapacitor), as a new type of electrochemical energy storage device, has the dual functions of capacitor and battery. Compared with the battery, the weight of the supercapacitor energy storage device is only 1 / 3 of the former, and the volume is only 1 / 2 of the former. . Therefore, it has a very wide range of applications in power systems, communications, new energy, aerospace, electric vehicles and other fields. Since the electrode material is the core component of the supercapacitor. Therefore, it is urgent to develop new electrode materials that can improve the energy density and power output characteristics of supercapacitors. [0003] Activated carbon fiber (ACF) has a large specific surface area, open pores on the surface, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/14D01F9/24H01G9/042
CPCY02E60/13
Inventor 宋怀河王国华陈晓红
Owner BEIJING UNIV OF CHEM TECH
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