Graphene/polythiophene derivative composite material as well as preparation method and application thereof

A technology of polythiophene derivatives and thiophene derivatives, which is applied in the field of electrochemical materials, can solve the problems of capacity attenuation and easy damage of the skeleton structure, and achieve the effect of high conductivity

Active Publication Date: 2012-10-31
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, like other conductive polymers, it is inevitable that the skeleton structure is easily damaged and the capacity decay is very obvious.

Method used

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  • Graphene/polythiophene derivative composite material as well as preparation method and application thereof
  • Graphene/polythiophene derivative composite material as well as preparation method and application thereof

Examples

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preparation example Construction

[0022] A kind of preparation method of graphene / polythiophene derivative composite material, such as figure 1 shown, including the following steps:

[0023] Step S1, add 500 mesh graphite powder into concentrated sulfuric acid at 0°C, then add potassium permanganate (mass ratio of graphite powder to potassium permanganate is 1:3), and keep stirring at 0-10°C for 2 hours , then stirred in a water bath at room temperature for 24 hours, then slowly added deionized water, then added a hydrogen peroxide solution with a concentration of 30wt%, and then carried out suction filtration, washing, suction filtration and drying to obtain graphene oxide; wherein, the washing process The washing liquid adopts the hydrochloric acid that mass percent concentration is 10%;

[0024] Step S2, dispersing graphite oxide and thiophene derivative monomers with a mass ratio of 1 to 2:1 in a 0.2 mol / L dilute sulfuric acid solution, and ultrasonically dispersing to obtain a mixed solution of graphene ...

Embodiment 1

[0033] (1) Add 0.5g of 500-mesh graphite powder with a purity of 99.5% to 0°C and 11.5mL of concentrated sulfuric acid, then add 1.5g of potassium permanganate, keep the temperature of the mixture at 0°C, stir for 2 hours, and then place it in a water bath at room temperature After stirring for 24 hours, slowly add 46 mL of deionized water. After 15 minutes, add 140 mL of deionized water, and then add 2.5 mL of hydrogen peroxide solution with a concentration of 30 wt%. % hydrochloric acid for washing, suction filtration, and vacuum drying at 60°C for 48 hours to obtain graphite oxide;

[0034] (2) Disperse graphite oxide and EDOT monomers with a quality of 0.5 g obtained in (1) in a 0.2 mol / L dilute sulfuric acid solution, and perform ultrasonic dispersion for 2 hours to obtain a single layer of graphene oxide and EDOT monomers uniformly mixed The solution;

[0035] (3) Add ammonium persulfate [(NH 4 ) 2 S 2 o 8 ] (the molar ratio of it to EDOT monomer is 2:1), fully stir...

Embodiment 2

[0038] (1) Add 0.5g of 100-mesh graphite powder with a purity of 99.5% to 0°C and 11.5mL of concentrated sulfuric acid, then add 1.5g of potassium permanganate, keep the temperature of the mixture at 10°C, stir for 2h, and then place it in a water bath at room temperature After stirring for 24 hours, slowly add 46 mL of deionized water; after 15 minutes, add 140 mL of deionized water, then add 2.5 mL of hydrogen peroxide solution with a concentration of 30 wt %, after which the color of the mixture turns bright yellow, filter with suction, and then use 250 mL of a concentration of 10 % hydrochloric acid for washing, suction filtration, and vacuum drying at 60°C for 48 hours to obtain graphite oxide;

[0039] (2) Disperse the graphite oxide and EDOT monomers of 0.5 g and 0.25 g obtained in (1) in 0.2 mol / L dilute sulfuric acid solution, and carry out ultrasonic dispersion for 1 h to obtain monolithic graphene oxide and EDOT monomers. a homogeneously mixed solution;

[0040] (3...

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Abstract

The invention belongs to the field of electrochemical materials, and discloses a graphene/polythiophene derivative composite material as well as a preparation method and application thereof. The preparation method of the composite material comprises the following steps of: preparing graphite oxide; preparing a mixed solution of graphene oxide and thiophene derivative monomer; preparing the graphene/polythiophene derivative composite material; and purifying the graphene/polythiophene derivative composite material. The prepared graphene/polythiophene derivative composite material has the advantages of good discharge performance, long cycle life, high thermal stability and the like.

Description

technical field [0001] The invention relates to the field of electrochemical materials, in particular to a graphene / polythiophene derivative composite material, its preparation method and application. Background technique [0002] Since Andre K. Geim (Andre K. Geim) of the University of Manchester in the United Kingdom prepared graphene materials in 2004, due to its unique structure and photoelectric properties, it has received widespread attention. Graphene is hailed as a rising "new star" in the field of materials science and condensed matter physics. Its many novel and unique properties and potential applications are attracting many scientific and technological workers. Single-layer graphene has a large specific surface area, excellent electrical and thermal conductivity and low thermal expansion coefficient. Such as: 1. High strength, Young's molar weight, (1,100GPa), breaking strength: (125GPa); 2. High thermal conductivity, (5,000W / mK); 3. High conductivity, carrier t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/139H01G9/042
CPCY02E60/122Y02E60/13Y02E60/10
Inventor 周明杰吴凤王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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