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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
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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 is not high in the preparation of existing polypyrrole / graphene composite materials, and proposes a A kind of method for preparing polypyrrole nanowire / graphene composite material

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  • 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

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Embodiment 1

[0033] (1) Prepare the 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 mass percentage of 90%:10%, weigh 0.5g (0.075M) pyrrole monomer and add it to the electrolyte, and stir it magnetically for 10min.

[0034] (2) Preparation of polypyrrole nanowire / graphene composite material: 0.06 g of graphene was added to the above solution, ultrasonicated for 30 min and left 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 the working electrode, a platinum sheet as the counter electrode, and a saturated calomel electrode as the reference electrode. Using the constant potential method, t...

Embodiment 2

[0038] (1) Prepare the electrolyte: weigh 3.08g disodium hydrogen phosphate and 0.08g lithium perchlorate, add 50ml deionized water to 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 mass percentage of 60%: 40%, weigh 0.5g (0.075M) pyrrole monomer into the electrolyte solution, and stir magnetically for 10min.

[0039] (2) Preparation of polypyrrole nanowire / graphene composite material: 0.34 g of graphene was added to the above solution, ultrasonicated for 30 min, and left 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 the working electrode, a platinum sheet as the counter electrode, and a saturated calomel electrode as the reference electrode. Using the constant potential method, the ...

Embodiment 3

[0043] (1) Prepare the electrolyte: weigh 3.08g disodium hydrogen phosphate and 0.08g lithium perchlorate, add 50ml deionized water to 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 mass percentage of 80%:20%, add 0.85g (0.125M) pyrrole monomer into the electrolyte, and magnetically stir for 10min.

[0044] (2) Preparation of polypyrrole nanowire / graphene composite material: 0.21 g of graphene was weighed and added to the above solution, ultrasonicated for 30 min and left 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 the working electrode, a platinum sheet as the counter electrode, and a saturated calomel electrode as the reference electrode. Using the constant potential method, the ...

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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.

Description

technical field [0001] The invention relates to a preparation method of a polypyrrole nanowire-graphene composite material, in particular to a method for forming a polypyrrole nanowire / graphene composite material by an electrochemical method using disodium hydrogen phosphate and lithium perchlorate as electrolytes. Background technique [0002] Polypyrrole, a conductive polymer with conjugated π-bonds, is widely used in electrode materials, supercapacitors, Fields such as biosensors have been paid attention to by researchers since their discovery. In addition to the characteristics of ordinary film-like polypyrrole, polypyrrole nanowires usually have an order of magnitude higher electrical conductivity than ordinary polypyrrole (see "Controlling the Morphology of Electronically Conductive Polymers", Penner, R. M., Martin, C. R, J . Electrochem. Soc., 133, 1986, 2206-2207), which makes the application of polypyrrole nanowires more advantageous in electrodes. In order to ob...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M4/90H01G9/042
CPCY02E60/12Y02E60/50Y02E60/13Y02E60/10
Inventor 赵志伟陈永强潘丽坤
Owner SOUTHEAST UNIV
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