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Electrode of capacitor and preparation method thereof

A technology for capacitor electrodes and capacitors, applied in hybrid capacitor electrodes, hybrid capacitor electrolytes, capacitors, etc., can solve the problems of poor dispersion of conductive polymers, increase electrode preparation costs, reduce material conductivity, etc., and achieve energy density and service life Longer length, less pulping and coating equipment, and higher power density

Inactive Publication Date: 2012-01-04
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many researchers coat the surface of carbon nanotubes (powder) with conductive polymers, mix them with binders, and then coat them on metal current collectors, such as: "Carbon Nanotube Composite Electrode Ultra-Large Capacitor and Its Manufacturing Method" (Application No.: 02133455.2) The patent discloses the preparation method of combining carbon nanotubes and conductive polymers as capacitor electrode materials, but the process is complicated and requires pulping and coating equipment, which increases the cost of electrode preparation; at the same time The use of adhesives also reduces the conductivity of the material
In addition, due to the poor dispersion of conductive polymers and the agglomeration of carbon nanotubes (powders), the electrochemical properties of materials such as specific capacity and energy density are not ideal, such as: "Carbon nanotube-polyaniline composites for supercapacitors The composite material of polyaniline and carbon nanotubes disclosed in the "Method for preparing materials" (application number: 200610019322.6) has the problem of low specific capacity
The patent "An array-based composite electrode" (application number: 200820136765.8) discloses an array electrode prepared on a conductive substrate with a one-dimensional array structure of aligned carbon nanotubes and composited with a metal oxide material. Excellent characteristics of specific capacity and high specific power, but the patent does not disclose the preparation method of the composite electrode, and the array electrode needs to be pasted on the conductive material matrix, so the power density of the electrode material is not yet ideal

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  • Electrode of capacitor and preparation method thereof
  • Electrode of capacitor and preparation method thereof
  • Electrode of capacitor and preparation method thereof

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specific Embodiment approach

[0031] An electrode of a capacitor is composed of a conductive base material and a polyaniline / aligned carbon nanotube composite material, and the polyaniline / aligned carbon nanotube composite material is directly grown on one or both sides of the conductive base material. The polyaniline / aligned carbon nanotube composite material is composed of single-wall or multi-wall aligned carbon nanotubes with a length of 20-150 μm and a diameter of 1-50 nm, and the thickness of the coated carbon nanotubes is not greater than 30 nm polyaniline film composition; the conductive matrix material is Al, Cu, Ti, Mg, Ni, Ta, Pt, stainless steel, mesophase microspheres, graphite, expanded graphite and other metal or non-metallic plates, foils, nets , particles or foam materials; in the polyaniline / aligned carbon nanotube composite electrode material, polyaniline accounts for 10%-80% of the total mass of the composite electrode material; preferably 50%-60%.

[0032] The steps of the preparation ...

Embodiment 1

[0039] 1) Put the Ti foil and the catalyst ferrocene into the quartz tube of the chemical vapor deposition system, in which the Ti foil is located in the high-temperature reaction zone of the quartz tube, and the catalyst ferrocene is located in the low-temperature zone at the inlet end of the quartz tube. Flow 200 mL / min of Ar and H into the quartz tube 2 After 30 min in the mixed gas, the temperature of the reaction zone was heated to 800 °C, and the temperature at the inlet end of the quartz tube was controlled at 300 °C. Adjust the intake rate, and feed the reaction gas, H 2 After reacting with the mixed gas of Ar for 30 min, the supply of reaction gas was stopped, and the quartz tube was cooled to room temperature under a protective atmosphere, and an array of carbon nanotubes oriented growth was obtained on the conductive substrate material.

[0040] 2) The conductive substrate of the surface-grown aligned carbon nanotube array obtained in step 1) is used as the working...

Embodiment 2

[0043] 1) Put the Ti foil and the catalyst ferrocene into the quartz tube of the chemical vapor deposition system, in which the Ti foil is located in the high-temperature reaction zone of the quartz tube, and the catalyst ferrocene is located in the low-temperature zone at the inlet end of the quartz tube. Flow 200 mL / min of Ar and H into the quartz tube 2 After 30 min in the mixed gas, the temperature of the reaction zone was heated to 800 °C, and the temperature at the inlet end of the quartz tube was controlled at 300 °C. Adjust the intake rate, and feed the reaction gas, H 2 After reacting with the mixed gas of Ar for 30 min, the supply of reaction gas was stopped, and the quartz tube was cooled to room temperature under a protective atmosphere, and an array of carbon nanotubes oriented growth was obtained on the conductive substrate material.

[0044] 2) The conductive substrate of the surface-grown aligned carbon nanotube array obtained in step 1) is used as the working...

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Abstract

The invention discloses an electrode of a capacitor and a preparation method thereof, and relates to a mixed super capacitor electrode based on polyaniline / directional carbon nanotube composite material and a preparation method thereof. The electrode is characterized by comprising a conductive matrix material and a polyaniline / directional carbon nanotube composite material; and the polyaniline / directional carbon nanotube composite material directly grows on one side or both sides of the conductive matrix material. In the preparation process, by selecting reaction gas and conductive matrix material and controlling chemical gas phase deposition technology, the directional carbon nanotube directly grows on a conductive matrix; then, electrochemical deposition of the directional carbon nanotube is carried out in vitriol solution of prepared hydrochloric acid aniline; and a polyaniline / directional carbon nanotube composite electrode with large power density, good multiplication rate performance, high energy density and long service life for a super capacitor is prepared. The invention has the characteristics of simple preparation process, low cost, easy large-scale production and the like.

Description

technical field [0001] A capacitor electrode and a preparation method thereof, relating to a hybrid supercapacitor electrode based on a polyaniline / aligned carbon nanotube composite material and a preparation method thereof. Background technique [0002] Supercapacitor is a new type of green energy storage device that has developed rapidly in recent years. It has fast charging and discharging characteristics, and its power density is dozens or even hundreds of times that of ordinary batteries. In addition, the cycle life is long, and the number of charging and discharging cycles can reach 100,000 times, which is hundreds or even thousands of times that of ordinary batteries. However, supercapacitors also have a fatal weakness as a power source or energy storage device, that is, at the current technical level, although its energy density is more than 100 times that of conventional capacitors, it is still significantly lower than that of secondary batteries (about 100 times th...

Claims

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Application Information

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IPC IPC(8): H01G9/042
CPCH01G11/36H01G11/22Y02E60/13H01G11/58
Inventor 陈德杨建红高宏权康乐
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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