Method for preparing double-meso-pore ordered mesoporous carbon/ polyaniline nanometer line composite materials and application thereof

A composite material and mesoporous carbon technology, applied in capacitors, circuits, electrolytic capacitors, etc., can solve the problems of reducing the high-speed charge and discharge capacity of supercapacitors, hindering the migration and diffusion of electrolyte ions, and achieving good cycle stability. Transport and diffusion, effect of increasing pore volume

Inactive Publication Date: 2013-02-13
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Ordered mesoporous carbon with large specific surface area and moderate pore size distribution is an ideal electrode material for supercapacitors. The traditional ordered mesoporous carbon materials used in research so far, because the pores are not connected, will prevent the electrolyte ions from flowing in the phase. Migration and diffusion between adjacent pores, while reducing the high-speed charge-discharge capability of supercapacitors, therefore, we proposed a composite method using double-mesoporous ordered mesoporous carbon as a carrier to support one-dimensional conductive polymer polyaniline

Method used

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  • Method for preparing double-meso-pore ordered mesoporous carbon/ polyaniline nanometer line composite materials and application thereof
  • Method for preparing double-meso-pore ordered mesoporous carbon/ polyaniline nanometer line composite materials and application thereof
  • Method for preparing double-meso-pore ordered mesoporous carbon/ polyaniline nanometer line composite materials and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 0.32g of ammonium persulfate into 10ml of deionized water, and cool in a refrigerator. 0.15 g of ordered mesoporous carbon with carbon walls embedded with silica particles was ultrasonically dispersed in 10 ml of 1M sulfuric acid solution. Add 0.14g of aniline monomer to the above mixing system, stir under vacuum for 60 minutes, then quickly add 10ml of 20wt% ethanol solution, add dropwise the pre-cooled ammonium persulfate solution, stir and react under ice bath for 10 hours, filter, A black powder was obtained after washing. After drying, the silica particles were removed with 10wt% hydrofluoric acid solution to obtain a double mesoporous composite material containing 60% polyaniline. Electron microscope photographs of the product figure 1 shown.

Embodiment 2

[0032] Weigh 0.64g of ammonium persulfate into 10ml of deionized water, and cool in a refrigerator. 0.15 g of ordered mesoporous carbon with carbon walls embedded with silica particles was ultrasonically dispersed in 10 ml of 1M sulfuric acid solution. Add 0.28g of aniline monomer to the above mixing system, stir under vacuum for 60 minutes, then quickly add 10ml of 20wt% ethanol solution, add dropwise the pre-cooled ammonium persulfate solution, stir and react under ice bath for 10 hours, filter, A black powder was obtained after washing. After drying, the silica particles were removed with 10wt% hydrofluoric acid solution to obtain a double mesoporous composite material containing 86% polyaniline.

[0033] Nitrogen adsorption-desorption analyzer (Micromeritics ASAP 2020) was used to characterize the specific surface area and pore size distribution of the dual mesoporous composite material prepared in the above example 1, the results are as follows figure 2 and shown in Ta...

Embodiment 3

[0034] Example 3 Characterization of the electrochemical test of the double mesoporous composite material

[0035] Mix the composite material prepared in Examples 1 and 2, conductive carbon black and polytetrafluoroethylene emulsion in a mass ratio of 85:10:5, add a small amount of absolute ethanol, and press it into a thin sheet with a thickness of about 1mm. Punched into a disc with a diameter of 11mm, and then compacted under a pressure of 10MPa. A simulated supercapacitor was assembled by using two electrodes with equal mass as the positive and negative electrodes of the capacitor, sandwiching a diaphragm, and using 1 M sulfuric acid solution as the electrolyte. The assembled supercapacitor was subjected to cyclic voltammetry and constant current charge and discharge tests at the electrochemical workstation, and the results were as follows: Figure 4 . According to the formula The specific capacitance values ​​corresponding to the dual mesoporous composites at differen...

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Abstract

The invention relates to a method for preparing double-meso-pore ordered mesoporous carbon/ polyaniline nanometer line composite materials and an application thereof. The method includes: using the ordered mesoporous carbon with silica nanometer particles embedded on carbon walls as a carrier, enabling a polyaniline nanometer line array to grow from the inside of a carbon duct to the outside in a chemical oxidative polymerization method, removing silica through hydrofluoric acid to obtain the classified composite materials of double-meso-pore ordered mesoporous carbon/ polyaniline nanometer line composite materials. Small meso pores on a carbon wall of mesoporous carbon can be effectively retained through the method which performs compounding and then removes the silica, specific surface area of the composite materials is improved, migration and diffusion between adjacent ducts of electrolyte ions are facilitated, and the electrochemical performance of the materials is further improved. The method has the advantages of being simple in preparing process, low in cost, capable of controlling the content of polyaniline in the composite materials and capable of being produced in scale mode, and the prepared electrode materials are high in specific capacitance, circulation stability and rate capability.

Description

technical field [0001] The invention belongs to the field of new energy materials, and relates to a preparation method of a supercapacitor electrode material, in particular to a preparation method of a double mesoporous ordered mesoporous carbon / polyaniline nanowire composite material and its application. Background technique [0002] As a new type of energy storage element, supercapacitors have excellent power characteristics and cycle performance, and are widely used in electric vehicles, communications, toys, smart instruments and other fields. Compared with traditional capacitors and secondary batteries, supercapacitors have a specific power of more than 10 times that of batteries, higher charge storage capacity than ordinary capacitors, fast charge and discharge speed, no pollution to the environment, long cycle life, and wide temperature range. It is the most promising new type of green energy in this century. Electrode materials are the key factors that determine the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C08K7/24C08K3/04C08J9/26H01G9/042
CPCY02E60/13
Inventor 程起林李春忠严燕芳姜立学
Owner EAST CHINA UNIV OF SCI & TECH
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