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Preparation method of conductive high polymer and carbon nanotube composite electrode material

A carbon nanotube composite and conductive polymer technology, applied in electrolytic capacitors, circuits, capacitors, etc., can solve the problems of reducing polymer capacity, shrinking polymer volume, and increasing polymer film defects

Inactive Publication Date: 2007-07-11
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the conductive polymer electrode material is discharged, the doped counter-ions are released from the polymer grid and enter the electrolyte (counter-ion dedoping), which will cause the volume shrinkage of the polymer and affect the intercalation and polymerization of counter-ions during charging. The capacity of the polymer is reduced due to the formation of the material network, and the repeated shrinkage and expansion will lead to the increase of defects in the polymer film and affect the cycle stability of the electrode.
The conductivity of the polymer will drop sharply when it is in the discharged state (dedoped state), which will greatly increase the internal resistance of the capacitor

Method used

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  • Preparation method of conductive high polymer and carbon nanotube composite electrode material
  • Preparation method of conductive high polymer and carbon nanotube composite electrode material

Examples

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Embodiment 1

[0012] Embodiment 1: first single-walled carbon nanotubes were ultrasonically oscillated in 0.6mol / L dodecylbenzenesulfonic acid solution for 5 minutes to obtain a dispersion A containing 0.01wt% of carbon nanotubes; Add conductive polymer monomer pyrrole to the diluted solution of A so that the concentration of conductive polymer monomer pyrrole is 0.6mol / L to prepare solution B; finally place the working electrode and counter electrode in solution B, and apply 10mA to the working electrode / cm 2 The current density is used for electrochemical polymerization. After the polymerization is completed, a uniform conductive polymer / carbon nanotube composite film can be obtained on the working electrode. The thickness of the composite film can be controlled by multiplying the polymerization electricity, that is, the polymerization current by the polymerization time. .

Embodiment 2

[0013] Embodiment 2: first multi-walled carbon nanotubes were ultrasonically oscillated in 0.2mol / L sodium dodecylbenzenesulfonate solution for 20 minutes to obtain a dispersion A containing 0.05wt% of carbon nanotubes; Or in the dilute solution of A, add conductive macromolecular monomer aniline to make the concentration of conductive macromolecular monomer aniline be 0.05mol / L; Then add chloride so that the concentration of chloride is 0.1mol / L to make solution B; The working electrode and the counter electrode are placed in solution B, and 8mA / cm is applied to the working electrode 2 The current density is used for electrochemical polymerization. After the polymerization is completed, a uniform conductive polymer / carbon nanotube composite film can be obtained on the working electrode. The thickness of the composite film can be controlled by multiplying the polymerization electricity, that is, the polymerization current by the polymerization time. .

Embodiment 3

[0014] Embodiment 3: first the single-walled carbon nanotubes were ultrasonically oscillated in 0.4mol / L potassium toluenesulfonate solution for 50 minutes to obtain a dispersion A containing 0.08wt% of carbon nanotubes; Add conductive polymer monomer thiophene to make the concentration of conductive polymer monomer thiophene 0.2mol / L in the diluted solution; then add perchlorate so that the concentration of perchlorate is 0.05mol / L to make solution B; Finally, place the working electrode and the counter electrode in solution B, and apply 5mA / cm to the working electrode 2 The current density is used for electrochemical polymerization. After the polymerization is completed, a uniform conductive polymer / carbon nanotube composite film can be obtained on the working electrode. The thickness of the composite film can be controlled by multiplying the polymerization electricity, that is, the polymerization current by the polymerization time. .

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Abstract

The invention discloses a making method of composite electrode material of conductive macromolecular and carbon nanometer pipe, which is characterized by the following: dispersing normal surface activator of carbon nanometer pipe in the polymeric solution; improving the specific capacity of composite material as well as coordinating effect; adsorbing bulk compaction and bulking at discharge time through hollow structure of carbon nanometer pipe; improving conductivity and reducing resistance of composite material.

Description

technical field [0001] The invention relates to a preparation method of a novel electronic material, in particular to a preparation method of a conductive polymer and carbon nanotube composite electrode material. Background technique [0002] With the gradual depletion of petrochemical resources and its increasingly serious impact on the environment and ecology, more and more attention has been paid to saving and using energy efficiently and cleanly. As one of the high-efficiency energy storage and energy conversion devices, supercapacitors (electrochemical capacitors) have received extensive attention. The electrode material is the decisive factor for the performance of supercapacitors. Due to the existence of different oxidation states, conductive polymers (polypyrrole, polyaniline, polythiophene, polyphenylene, and their derivatives and other conjugated polymers) can be used as electrode materials for redox supercapacitors. Compared with other two common types of superc...

Claims

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Application Information

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IPC IPC(8): C08L65/00C08L79/00C08L79/02C08K3/04H01G9/042
CPCY02E60/13
Inventor 徐友龙王杰孙孝飞肖芳
Owner XI AN JIAOTONG UNIV
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