Method for preparing polypyrrole/sliver nano composite material

A composite material and silver nanotechnology, which is applied in the direction of nanotechnology, nanotechnology, hybrid/electric double layer capacitor manufacturing, etc., can solve the problem of uneven dispersion of conductive metal silver, and achieve improved conductivity, good tailoring effect, and specific electric capacity. The effect of capacity increase

Active Publication Date: 2015-05-06
SHANGHAI INST OF TECH
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AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of preparation method of polypyrrole / silver nanocomposite material in order to solve technical problem such as above-mentioned conductive metal silver is dispersed unevenly in polypyrrole, the nanometer in the polypyrrole / silver nanocomposite material obtained by this preparation method Silver particles are evenly dispersed in the polypyrrole matrix, and significantly improve the conductivity of the composite material, making active materials more effectively used, with better conductivity and higher specific capacitance, and can be used as supercapacitor electrode materials

Method used

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  • Method for preparing polypyrrole/sliver nano composite material
  • Method for preparing polypyrrole/sliver nano composite material
  • Method for preparing polypyrrole/sliver nano composite material

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Experimental program
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Effect test

Embodiment 1

[0022] 0.2123g of silver nitrate and 1.005ml of pyrrole monomer were dissolved in 200ml of deionized water to form a uniform mixed system, and 7.5ml of trisodium citrate aqueous solution with a concentration of 0.5mol / L was added therein at a rate of 3mL / min under continuous stirring. Continue to stir for 20 minutes after the dropwise addition, then add 50ml of ferric chloride aqueous solution with a concentration of 0.3mol / L at a rate of 10mL / min, and control the temperature at 0°C for 6 hours of reaction. After the reaction, the resulting reaction solution is suction filtered. The obtained filter cake was washed three times with ethanol and deionized water successively, and then dried at a controlled temperature of 60° C. to obtain a spherical or quasi-spherical polypyrrole / silver nanocomposite;

[0023] The amount of above-mentioned silver nitrate used, pyrrole monomer, trisodium citrate aqueous solution is calculated by molar ratio, i.e. silver nitrate: pyrrole monomer: tri...

Embodiment 1

[0031] The amount of ferric chloride aqueous solution used is calculated by molar ratio, that is, pyrrole monomer: ferric chloride is 1:1.

[0032] The polypyrrole particles obtained above were scanned by a Quanta 200FEG environmental scanning electron microscope from FEI Company of the Netherlands, and the obtained SEM image is as follows: Figure 4 As shown, the polypyrrole particles are stacked as chains, and the polypyrrole particles synthesized by the in-situ polymerization method have no regular morphology.

[0033] Will figure 1 and Figure 4 By contrast, it can be seen that in the preparation method of a polypyrrole / silver nanocomposite material of the present invention, under the situation that silver nitrate and sodium citrate exist in the preparation process, the particle shape of the gained particles is aggregated by the quasi-spherical chain shape of mutual adhesion. The body became monodisperse spherical particles, which indicated that the presence of silver n...

Embodiment 2

[0039] 0.2123g of silver nitrate and 0.650ml of pyrrole monomer were dissolved in 200ml of deionized water to form a uniform mixed system, and 12.5ml of trisodium citrate aqueous solution with a concentration of 0.3mol / L was added therein at a rate of 5mL / min under continuous stirring. Continue stirring for 20 minutes after the dropwise addition, then add 50ml of ferric chloride aqueous solution with a concentration of 0.9mol / L at a rate of 5mL / min, and control the temperature at 5°C for 4 hours of reaction. After the reaction, the resulting reaction solution is suction filtered. The obtained filter cake was washed three times with ethanol and deionized water successively, and then dried at a controlled temperature of 60° C. to obtain a spherical or quasi-spherical polypyrrole / silver nanocomposite;

[0040] The amount of the above-mentioned silver nitrate used, pyrrole monomer, and trisodium citrate aqueous solution is calculated in molar ratio, that is, silver nitrate: pyrrole...

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Abstract

The invention relates to a method for preparing a polypyrrole/sliver nano composite material; the method comprises the steps: mixing pyrrole monomers and silver nitrate solution into a system and dropwise adding trisodium citrate aqueous solution in a stirring condition; after the dropwise adding is finished, continuously stirring for 10-30 min, dropwise adding ferric trichloride aqueous solution and reacting for 4-12h; at the end of the reaction, pumping and filtering reaction solution; washing an obtained filter cake with ethyl alcohol and de-ionized water for twice or three times; and drying to obtain spherical or sphere-like polypyrrole/sliver nano composite material with particle size of 100-250nm, pore diameter of 3-15nm and pore volume of 0.283-0.356 cm3/g. The preparation method does not need expensive equipment and instruments, is simple and has lower requirement on the reaction environment and low production cost. The prepared polypyrrole/sliver nano composite material is used as the electrode material of supercapacitors and has excellent specific capacitance performance and thermal stability.

Description

technical field [0001] The invention relates to a silver / polypyrrole nanocomposite material, in particular to a preparation method of the polypyrrole / silver nanocomposite material. Background technique [0002] Supercapacitor is a new type of high-efficiency and practical green energy storage device between batteries and traditional capacitors. It has the advantages of high power density of conventional capacitors and high power density of rechargeable batteries. It has wide application prospects in new energy power generation, electric vehicles, information technology, aerospace, national defense technology and other fields. [0003] Polypyrrole (hereinafter referred to as PPy) has the characteristics of high electrical conductivity, high environmental stability, simple synthesis process and environmental friendliness. In particular, fields such as biosensors also show broad application prospects. However, the marketization of supercapacitors prepared using PPy still face...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/48H01G11/24
CPCY02E60/13H01G11/30B82Y30/00H01G11/48
Inventor 万传云原黎阳沈海燕
Owner SHANGHAI INST OF TECH
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