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A kind of preparation method of graphene/conductive polymer composite electrode material

A conductive polymer and composite electrode technology, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of easy agglomeration, poor cycle stability, and low electrochemical performance, and achieve inhibition of agglomeration and good dispersion , the effect of high degree of polymerization

Active Publication Date: 2018-05-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention aims to solve the problem that graphene is easy to agglomerate because of its large specific surface energy, causing its electrochemical performance to be far lower than the theoretical value; although the conductive polymer has a large specific capacitance, the problem of poor cycle stability is provided. A kind of preparation method of graphene / conductive polymer composite electrode material

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  • A kind of preparation method of graphene/conductive polymer composite electrode material

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specific Embodiment approach 1

[0024] Specific embodiment one: the preparation method of graphene / conductive polymer composite electrode material in this embodiment is realized according to the following steps:

[0025] Step a, mix 20ml of dilute hydrochloric acid with a concentration of 1mol / L, 50ml of absolute ethanol and 1.252g of ammonium persulfate to form solution A;

[0026] Step b, mix 80ml of dilute hydrochloric acid with a concentration of 1mol / L, 50ml of absolute ethanol, 0.626g of polyaniline and graphene, and then use a magnetic stirrer and a digitally controlled ultrasonic cleaner (ultrasonic frequency is 120kHz), and ultrasonically stir for 1.0h to configure Solution B, the mass fraction that graphene accounts for solution B is 15%;

[0027] Step c. Put solution A and solution B in a high-low temperature circulation box respectively, freeze at a constant temperature at -40°C for 2 hours, then quickly mix them, and then place them in a high-low temperature circulation box and stand for reactio...

specific Embodiment approach 2

[0030] Specific embodiment two: the preparation method of graphene / conductive polymer composite electrode material in this embodiment is realized according to the following steps:

[0031] Step a, mix 20ml of dilute hydrochloric acid with a concentration of 1mol / L, 50ml of absolute ethanol and 1.252g of ammonium persulfate to form solution A;

[0032] Step b. After mixing 80ml of dilute hydrochloric acid with a concentration of 1mol / L, 50ml of absolute ethanol, 0.626g of polyaniline and graphene, use a magnetic stirrer and a digitally controlled ultrasonic cleaner at 120kHz, and ultrasonically stir for 1.0h to configure solution B, graphite The mass fraction of alkene accounting for solution B is 10%;

[0033] Step c. Put solution A and solution B in a high-low temperature circulation box respectively, freeze at a constant temperature at -20°C for 2 hours, then quickly mix them, and then place them in a high-low temperature circulation box and stand for reaction at -20°C for 2...

specific Embodiment approach 3

[0035] Specific embodiment three: the preparation method of graphene / conductive polymer composite electrode material in this embodiment is realized according to the following steps:

[0036] Step a, mix 20ml of dilute hydrochloric acid with a concentration of 1mol / L, 50ml of absolute ethanol and 1.252g of ammonium persulfate to form solution A;

[0037] Step b. After mixing 80ml of dilute hydrochloric acid with a concentration of 1mol / L, 50ml of absolute ethanol, 0.626g of polythiophene and graphene, use a magnetic stirrer and a digitally controlled ultrasonic cleaner at 120kHz, and ultrasonically stir for 1.0h to configure solution B, graphite The mass fraction of alkene accounting for solution B is 20%;

[0038] Step c. Put solution A and solution B in a high-low temperature circulation box respectively, freeze at a constant temperature at -40°C for 2 hours, then quickly mix them, and then place them in a high-low temperature circulation box and stand for reaction at -40°C f...

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Abstract

The invention provides a preparation method of a graphene / conducting polymer composite electrode material and belongs to the field of supercapacitors. The problems that graphene is prone to agglomeration due to the large specific surface energy, so that the electrochemical performance of the graphene is far lower than a theoretical value; although a conducting polymer has large specific capacitance, cycling stability is poor are solved. The method includes the steps that diluted hydrochloric acid, absolute ethyl alcohol and ammonium persulfate are mixed to be prepared into a solution A; diluted hydrochloric acid, absolute ethyl alcohol, the conducting polymer and the graphene are mixed and then ultrasonically stirred to be prepared into a solution B; the solution A and the solution B are frozen at constant temperature respectively and then rapidly mixed, a standing reaction is carried out at low temperature, vacuum filtration is carried out, washing with deionized water, absolute ethyl alcohol and n-hexane is sequentially carried out, and grinding is carried out after vacuum drying is completed. According to the product, the surface and edge of the graphene are evenly coated with conducting polymer nano-rods of open pore channel type structures, agglomeration of the graphene is well inhibited, and the composite electrode material has good cycling stability, the high polymerization degree and the low agglomeration degree.

Description

technical field [0001] The invention belongs to the field of supercapacitors; in particular, it relates to a preparation method of a graphene / conductive polymer composite electrode material. Background technique [0002] Supercapacitor is a new type of environmentally friendly energy storage device, which has the advantages of large capacity, high specific power and good stability. Its performance is mainly determined by the electrode material. At present, the electrode materials of supercapacitors are mainly carbon materials, metal oxides, conductive polymers and their composite materials. Among these materials, graphene has a 2p electron that does not participate in hybridization because the coordination number of each C atom is 3, and all p orbitals are perpendicular to the extension direction of graphene, so that the electrons in the p orbital form a large π bond, and can move automatically in the two-dimensional plane of graphene. Therefore, graphene has extremely stro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/32H01G11/36H01G11/48H01G11/86
CPCY02E60/13
Inventor 吕海宝姚永涛李蔓妮邱思郑婷鲁春蕊刘盈驿肖海英张东兴
Owner HARBIN INST OF TECH