Method for preparing polypyrrole nanometer wire-graphene composite material

A technology of polypyrrole nanowires and composite materials, which is applied in the field of preparation of polypyrrole nanowires-graphene composite materials, can solve the problem of low electrical conductivity at the same time, and achieve the effects of short time, controllable operation process and high electrical conductivity

Inactive Publication Date: 2012-07-04
SOUTHEAST UNIV
4 Cites 21 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0006]Technical content: The purpose of the present invention is to overcome the shortcoming that the final product exists in the form of powder while the electrical conductivity ...
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Abstract

Provided is a method for preparing a polypyrrole nanometer wire-graphene composite material. Pyrrole monomer and graphene powder are added in prepared disodium hydrogen phosphate lithium perchlorate aqueous solution with certain concentration according to certain proportion, even suspension liquid is obtained after ultrasonic dispersion, an experiment is carried out in a three-electrode system controlled by an electrochemical workstation, an electrochemical method is adopted, and the polypyrrole nanometer wire-graphene composite material is obtained through polymerization on an electric conduction substrate. The method is simple in process, short in time, controllable in operation procedure and low in cost. The composite material is high in conductivity rate, capable of serving as electrode materials to be applied to a fuel battery, capable of being applied to supercapacitors, lithium batteries, sensors and the like.

Application Domain

Electrolytic capacitorsCell electrodes

Technology Topic

Electro conductivityGraphene +13

Image

  • Method for preparing polypyrrole nanometer wire-graphene composite material
  • Method for preparing polypyrrole nanometer wire-graphene composite material
  • Method for preparing polypyrrole nanometer wire-graphene composite material

Examples

  • Experimental program(4)

Example Embodiment

[0032] Example 1
[0033] (1) Configure electrolyte: Weigh 3.08g disodium hydrogen phosphate and 0.08g lithium perchlorate, add 50ml deionized water, and configure into a mixed electrolyte containing 0.2M disodium hydrogen phosphate and 0.01M lithium perchlorate, Stir with a magnetic stirrer for 30 min. According to the ratio of pyrrole and graphene with a mass percentage of 90%:10%, weigh 0.5g (0.075M) of pyrrole monomer into the electrolyte, and magnetically stir for 10 minutes.
[0034] (2) Preparation of polypyrrole nanowire/graphene composite material: add 0.06 g of graphene to the above solution, ultrasonicate for 30 minutes and then stand still to obtain a uniformly dispersed mixed solution. The polymerization experiment was carried out in a three-electrode system controlled by an electrochemical workstation, with a nickel sheet as a working electrode, a platinum sheet as a counter electrode, and a saturated calomel electrode as a reference electrode. Using the potentiostat method, the polymerization voltage was 0.8V, and the obtained sample was washed with ethanol and deionized water and then dried.
[0035] (3) Cyclic voltammetry characteristics test of polypyrrole nanowire/graphene composite material: configure 0.2M LiClO 4 The solution is 50ml, using cyclic voltammetry in a three-electrode system controlled by an electrochemical workstation, setting the voltage parameter range to -0.9V-0.9V, and the scanning rate to 50mV/s for testing.
[0036] (4) Electrochemical impedance performance test of polypyrrole nanowire/graphene composite material: configure 0.2M LiClO 4 Solution 50ml, put the electrode prepared in (2) in the solution and soak for 30 minutes, in the three-electrode system controlled by the electrochemical workstation, select electrochemical impedance spectroscopy, the starting voltage parameter is set to 0V, the scanning frequency range is set to 0.01Hz-100KHz, the signal amplitude is set to 5mV, test.

Example Embodiment

[0037] Example 2
[0038] (1) Configure electrolyte: Weigh 3.08g disodium hydrogen phosphate and 0.08g lithium perchlorate, add 50ml deionized water, and prepare a mixed electrolyte containing 0.2M disodium hydrogen phosphate and 0.01M lithium perchlorate. Stir with a magnetic stirrer for 30 min. According to the ratio of pyrrole and graphene with a mass percentage of 60%:40%, weigh 0.5g (0.075M) of pyrrole monomer into the electrolyte, and magnetically stir for 10 minutes.
[0039] (2) Preparation of polypyrrole nanowire/graphene composite material: 0.34 g of graphene was added to the above solution, ultrasonicated for 30 minutes, and then allowed to stand to obtain a uniformly dispersed mixed solution. The polymerization experiment was carried out in a three-electrode system controlled by an electrochemical workstation, with a nickel sheet as a working electrode, a platinum sheet as a counter electrode, and a saturated calomel electrode as a reference electrode. Using the potentiostat method, the polymerization voltage was 0.8V, and the obtained sample was washed with ethanol and deionized water and then dried.
[0040] (3) Cyclic voltammetry characteristics test of polypyrrole nanowire/graphene composite material: configure 0.2M LiClO 4 The solution is 50ml, in a three-electrode system controlled by an electrochemical workstation, using cyclic voltammetry, setting the voltage parameter range to -1.0V-1.0V, and the scanning rate to 50mV/s for testing.
[0041] (4) Electrochemical impedance performance test of polypyrrole nanowire/graphene composite material: configure 0.2M LiClO 4 Solution 50ml, put the electrode prepared in (2) in the solution and soak for 30 minutes, in the three-electrode system controlled by the electrochemical workstation, select electrochemical impedance spectroscopy, the starting voltage parameter is set to 0V, the scanning frequency range is set to 0.01Hz-100KHz, the signal amplitude is set to 5mV, test.

Example Embodiment

[0042] Example 3
[0043] (1) Configure electrolyte: Weigh 3.08g disodium hydrogen phosphate and 0.08g lithium perchlorate, add 50ml deionized water, and prepare a mixed electrolyte containing 0.2M disodium hydrogen phosphate and 0.01M lithium perchlorate. Stir with a magnetic stirrer for 30 min. According to the ratio of pyrrole and graphene with a mass percentage of 80%:20%, 0.85g (0.125M) of pyrrole monomer was added to the electrolyte and magnetically stirred for 10 minutes.
[0044] (2) Preparation of polypyrrole nanowire/graphene composite material: Weigh 0.21 g of graphene and add it to the above-mentioned solution, sonicate for 30 minutes and then stand to obtain a uniformly dispersed mixed solution. The polymerization experiment was carried out in a three-electrode system controlled by an electrochemical workstation, with a nickel sheet as a working electrode, a platinum sheet as a counter electrode, and a saturated calomel electrode as a reference electrode. Using the potentiostat method, the polymerization voltage was 0.8V, and the obtained sample was washed with ethanol and deionized water and then dried.
[0045] (3) Cyclic voltammetry characteristics test of polypyrrole nanowire/graphene composite material: configure 0.2M LiClO 4 The solution is 50ml, in a three-electrode system controlled by an electrochemical workstation, using cyclic voltammetry, setting the voltage parameter range to -1.0V-1.0V, and the scanning rate to 50mV/s for testing.
[0046] (4) Electrochemical impedance performance test of polypyrrole nanowire/graphene composite material: configure 0.2M LiClO 4 Solution 50ml, put the electrode prepared in (2) in the solution and soak for 30 minutes, in the three-electrode system controlled by the electrochemical workstation, select electrochemical impedance spectroscopy, the starting voltage parameter is set to 0V, the scanning frequency range is set to 0.01Hz-100KHz, the signal amplitude is set to 5mV, test.
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