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Preparation method of graphene polyaniline layered nano composite material for supercapacitor

A technology of nanocomposite materials and supercapacitors, which is applied in the manufacture of hybrid/electric double layer capacitors and electrodes of hybrid capacitors. The effect of little hindrance

Inactive Publication Date: 2019-04-19
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the graphene sheets produced by this method are greatly affected by the SiC substrate, and the thickness of the graphene sheets is often uneven. At the same time, the interaction between the product and the substrate will affect the characteristics of graphene.
3. Chemical vapor deposition method: the required equipment is very expensive, and the reaction conditions are relatively high, which restricts the large-scale application of this method in actual production
4. Cutting carbon nanotube method: This method has great requirements for experimental equipment and experimental operation difficulty, and cannot meet the needs of general laboratory research
5. Reduction of graphite oxide method: the conductivity of graphite oxide is very poor
[0007] The above inventions have their good advantages, but the graphene-polyaniline composite materials are all adsorption type and cannot be combined well. The distribution of polyaniline on the surface of graphene is uneven, which has a great hindering effect on the current.

Method used

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  • Preparation method of graphene polyaniline layered nano composite material for supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Graphene oxide was prepared by Hummer oxidation method:

[0074] 1) Take 120mL concentration of 98% concentrated H 2 SO 4 Add to a 1L beaker, weigh 2g of P 2 o 5 And 5g of graphite powder added concentrated H 2 SO 4 , stir with a magnetic stirrer for 2.5h, set the temperature at 5°C;

[0075] 2) Add 13g of KMnO to the stirred solution 4 , add slowly to prevent the beaker from bursting due to excessive heat release, keep the temperature of the solution below 20°C, heat to 34°C, and keep it warm for 2 hours;

[0076] 3) Add 230 mL of deionized water, control the temperature at 98°C, and stir for 15 minutes;

[0077] 4) Add 0.7L of deionized water to terminate the reaction, meanwhile, add 13mL of H 2 o 2 ;

[0078] 5) Wash the obtained solution twice in a centrifuge with HCL prepared with a mass concentration of 20% hydrochloric acid and water at a volume ratio of 1:10, and then use deionized water to continue washing until the solution is neutral;

[0079]6) Po...

Embodiment 2

[0094] Graphene oxide prepared by Hummer oxidation method:

[0095] 1) Take 115 mL of 98% concentrated H 2 SO 4 Add it to a 1L beaker and weigh 3g of P 2 o 5 And 6g of graphite powder added concentrated H 2 SO 4 , stir with a magnetic stirrer for 3 hours, and set the temperature at 6°C;

[0096] 2) Add 10g of KMnO to the stirred solution 4 , add slowly to prevent the beaker from bursting due to excessive heat release, keep the temperature of the solution below 20°C, heat to 32°C, and keep it warm for 1.5h;

[0097] 3) Add 235 mL of deionized water, control the temperature at 96°C, and stir for 17 minutes;

[0098] 4) Add 0.7L deionized water to terminate the reaction, and at the same time, add 15mL of H 2 o 2 ;

[0099] 5) Wash the obtained solution twice in a centrifuge with HCL prepared with hydrochloric acid with a mass concentration of 20% to 36% and water at a volume ratio of 1:10, and then use deionized water to continue washing until the solution is neutral; ...

Embodiment 3

[0115] Graphene oxide was prepared by Hummer oxidation method:

[0116] 1) Take 115 mL of 98% concentrated H 2 SO 4 Add to a 1L beaker, weigh 2g of P 2 o 5 And 4g of graphite powder added concentrated H 2 SO 4 , stirred with a magnetic stirrer for 2 hours, and set the temperature at 4°C;

[0117] 2) Add 14g of KMnO to the stirred solution 4 , add slowly to prevent the beaker from bursting due to excessive heat release, keep the temperature of the solution below 20°C, heat to 34°C, and keep it warm for 2.5h;

[0118] 3) Add 225 mL of deionized water, control the temperature at 96°C, and stir for 12 minutes;

[0119] 4) Add 0.5L of deionized water to terminate the reaction, meanwhile, add 15mL of H 2 o 2 ;

[0120] 5) Wash the obtained solution twice in a centrifuge with HCL prepared with a mass concentration of 36% hydrochloric acid and water at a volume ratio of 1:10, and then use deionized water to continue washing until the solution is neutral;

[0121] 6) Pour th...

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Abstract

The invention discloses a preparation method of a graphene polyaniline layered nano composite material for a supercapacitor and a method for preparing the supercapacitor by employing the composite material. The polyaniline is taken as an N-doped basic raw material, a liquid surface polymerization method is employed to deposit the polyaniline nanowires on a graphite thin layer, the polyaniline is more uniform and finely distributed to allow the current inhibition of the graphene polyaniline composite material to be small and allow the conductivity of the capacitor pole piece to be higher. Compared to the prior art, the graphene polyaniline composite material prepared by employing the liquid surface polymerization method has strong chemical bond force between the graphene polyaniline due tothe polymerization reaction, is a whole substance and a high binding force. The capacitor pole piece manufactured by employing the graphene polyaniline composite material prepared by employing the liquid surface polymerization method is employed to reduce the current inhibition of the graphene polyaniline composite material and improve the conductivity of the pole piece.

Description

technical field [0001] The invention relates to the technical field of material processing and preparation, in particular to a method for preparing a graphene-polyaniline layered nanocomposite material for supercapacitors and a method for supercapacitors prepared by using the composite material. Background technique [0002] Supercapacitors have become one of the hot spots in the research of new energy or new materials all over the world, and their electrode materials are the key to restricting the improvement of electrochemical performance. However, the electrochemical performance of a single material cannot meet the needs of modern society for energy storage devices. The design and construction of composite materials can better solve this problem, thereby preparing supercapacitors with high energy density and power density. [0003] At present, the preparation methods of graphene mainly include 1. Mechanical exfoliation method: the scale of graphene sheets obtained by this...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/26H01G11/30H01G11/32H01G11/48
CPCH01G11/26H01G11/30H01G11/32H01G11/48H01G11/86Y02E60/13
Inventor 滕莹雪郭菁李军丽朱玉刘思尧
Owner UNIV OF SCI & TECH LIAONING
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