Polyaniline nanowire/ graded porous carbon composite material as well as preparation method and application thereof

A carbon composite material, graded porous technology, used in capacitors, circuits, electrolytic capacitors, etc., can solve problems such as hindering application and poor cycle stability, and achieve the effect of increasing capacitance performance, good specific energy density, and easy availability.

Active Publication Date: 2013-12-25
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its poor cycle stability due to the redox reaction in the energy storage process hinders its practical application.

Method used

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  • Polyaniline nanowire/ graded porous carbon composite material as well as preparation method and application thereof
  • Polyaniline nanowire/ graded porous carbon composite material as well as preparation method and application thereof
  • Polyaniline nanowire/ graded porous carbon composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 0.2g of the hollow mesoporous silicon / carbon composite prepared in the above step (3), put it into 15ml of 1M perchloric acid solution and sonicate for 30 minutes to fully disperse the hollow mesoporous silicon sphere / carbon composite, add 27.4μL of aniline monomer Continue to sonicate for 10 minutes. Weigh 0.069g of ammonium persulfate and dissolve it in 15ml of 1M perchloric acid solution, place it in the refrigerator for a period of time and slowly add it dropwise to the above mixed solution, stir and react in the ice-water bath for 24 hours, after washing and drying A black powder was obtained. Finally, the hollow mesoporous silicon sphere template was removed with 5% hydrofluoric acid to obtain a polyaniline nanowire / hierarchical porous carbon composite. Electron microscope photographs of the product figure 1 shown.

Embodiment 2

[0043] Weigh 0.2g of the hollow mesoporous silicon sphere / carbon composite prepared in the above step (3), put it into 15ml of 1M perchloric acid solution and ultrasonically disperse the hollow mesoporous silicon sphere / carbon composite for 30 minutes, add 54.7μL of aniline monomer and continue Sonicate for 10 minutes. Weigh 0.137g of ammonium persulfate and dissolve it in 15ml of 1M perchloric acid solution, place it in the refrigerator for a period of time and slowly add it dropwise to the above mixed solution, stir and react in the ice-water bath for 24 hours, after washing and drying A black powder was obtained. Finally, the hollow mesoporous silicon sphere template was removed with 5% hydrofluoric acid to obtain a polyaniline nanowire / hierarchical porous carbon composite. Electron microscope photographs of the product figure 2 shown.

example 3

[0044] Characterization of Example 3 Polyaniline Nanowire / Hierarchical Porous Carbon Composite

[0045] The specific surface area and pore size distribution of the polyaniline nanowires / hierarchical porous carbon composites prepared in the above-mentioned examples 1 and 2 were analyzed using a field emission electron microscope (HITACHI S4800) and a nitrogen adsorption-desorption analyzer (Micromeritics ASAP 2020) respectively. representation. Table 1 is the specific surface area and pore size distribution curve of the product of Example 2. Table 2 is the specific capacitance performance of the products of Example 1 and Example 2 at different current densities.

[0046]

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Abstract

The invention discloses a polyaniline nanowire / graded porous carbon composite material as well as a preparation method and application thereof. The method is characterized in that a hollow mesoporous silicon / carbon compound serves as a carrier; a polyaniline nanowire array grows on the surface of the carrier with a chemically oxidative copolymerization method; and then, a hollow mesoporous silicon template is removed by hydrofluoric acid to obtain the polyaniline nanowire / graded porous carbon composite material. The composite material prepared by the method can better keep the mesoporous duct of graded porous carbon, and the specific surface area and the hole volume of the composite material are improved so as to enhance the electrochemical stability and the multiplying power characteristics of the composite material. The concentration of aniline in reactant is regulated to control the content and the morphological structure of the polyaniline in the composite material so as to affect the electrochemical performance of the composite material. The preparation method has the active effects of simple preparation process and low cost, the content of each component in the composite material is easy to regulate, and large-scale production is easy to carry out. The prepared electrode material has the advantages of high specific capacity, favorable circulating stability and multiplying power characteristics.

Description

technical field [0001] The invention belongs to the field of new energy materials, and relates to a method for preparing a polyaniline nanowire / hierarchical porous carbon composite material that can be used as an electrode material for a supercapacitor. Background technique [0002] With the development of social economy, people pay more and more attention to green energy and ecological environment. As a new type of energy storage device, supercapacitor has the characteristics of high energy density, high power density, long cycle life and wide temperature range. Unattended and mobile energy systems, backup power systems and other aspects have extremely important application value. Especially with the rise of environmentally friendly electric vehicles, high-power supercapacitors have shown unprecedented application prospects. Therefore, supercapacitors are being developed and produced by more and more countries and enterprises. Electrode material is an important factor af...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/02C08K3/04C08G73/02H01G9/042
CPCY02E60/13
Inventor 程起林李春忠夏玉明
Owner EAST CHINA UNIV OF SCI & TECH
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