Boron-doped graphene/polyaniline composite aerogel and preparation method thereof

A composite airgel and graphene technology, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of not having compression recovery performance and compressible supercapacitors, and achieve good compression recovery performance, structural enhancement, and improved mechanical properties. Effect

Active Publication Date: 2018-10-26
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these graphene / polyaniline composite aerogels do not have compression recovery properties and cannot be applied in the construction of compressible supercapacitors.

Method used

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  • Boron-doped graphene/polyaniline composite aerogel and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A boron-doped graphene / polyaniline composite airgel, comprising the steps of:

[0029] 1) 20 μL of aniline and 20 μL of a sodium tetraborate solution with a concentration of 20 mg / mL were added to 25 mL of a graphene oxide solution with a concentration of 2 mg / mL;

[0030] 2) The above mixed solution was subjected to a hydrothermal reaction at 80°C for 15 hours to obtain a composite hydrogel;

[0031] 3) Soak the obtained composite hydrogel in ethanol / deionized aqueous solution with a volume ratio of 1:5 for dialysis for 8 hours, and then freeze at -15°C for 8 hours;

[0032] 4) The lyophilized composite gel was naturally air-dried at 15°C for 48 hours to obtain the boron-doped graphene / polyaniline composite airgel.

[0033] figure 1 The obtained boron-doped graphene / polyaniline composite airgel of this embodiment is a schematic diagram of the state before bearing 500g weight, when bearing 500g weight and after removing 500g weight; it can be seen from the figure that...

Embodiment 2

[0035] A boron-doped graphene / polyaniline composite airgel, comprising the steps of:

[0036] 1) Add 110 μL of aniline and 50 μL of sodium tetraborate solution with a concentration of 50 mg / mL into 30 mL of graphene oxide solution with a concentration of 4 mg / mL, respectively;

[0037] 2) The above mixed solution was subjected to a hydrothermal reaction at 120°C for 14 hours to obtain a composite hydrogel;

[0038] 3) The obtained composite hydrogel was soaked in ethanol / deionized aqueous solution with a volume ratio of 1:200 for dialysis for 9 hours, and then frozen at -10°C for 9 hours;

[0039] 4) After the lyophilized composite gel was naturally air-dried at 25° C. for 24 hours, a boron-doped graphene / polyaniline composite airgel was obtained.

[0040] After testing, the boron-doped graphene / polyaniline composite airgel obtained in this example can exhibit good compression recovery performance.

Embodiment 3

[0042] A boron-doped graphene / polyaniline composite airgel, comprising the steps of:

[0043] 1) 80 μL of aniline and 60 μL of sodium tetraborate solution with a concentration of 40 mg / mL were added to 30 mL of graphene oxide solution with a concentration of 4 mg / mL;

[0044] 2) The above mixed solution was subjected to a hydrothermal reaction at 100°C for 15 hours to obtain a composite hydrogel;

[0045] 3) Soak the obtained composite hydrogel in ethanol / deionized aqueous solution with a volume ratio of 1:80 for dialysis for 4 hours, and then freeze at -10°C for 24 hours;

[0046] 4) After the lyophilized composite gel was naturally air-dried at 40° C. for 24 hours, a boron-doped graphene / polyaniline composite airgel was obtained.

[0047] After testing, the boron-doped graphene / polyaniline composite airgel obtained in this example can exhibit good compression recovery performance.

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Abstract

The invention discloses a boron-doped graphene / polyaniline composite aerogel and a preparation method thereof. The aerogel is prepared in the following steps of 1) adding aniline, and the sodium tetraborate solution into graphene oxide solution; 2) carrying out hydrothermal reaction on the mixed solution so as to obtain composite aerogel; 3) immersing the obtained composite aerogel in dialyzate for freezing; and 4) carrying out natural withering on the frozen composite aerogel so as to obtain the boron-doped graphene / polyaniline composite aerogel. According to the invention, by using the interaction between the aniline and graphene oxide and combining the doping of boron to the graphene, the boron-doped graphene / polyaniline composite aerogel is prepared under the hydrothermal condition next step method; the related prepared method is simple; the reaction conditions are gentle; the boron-doped graphene / polyaniline composite aerogel is suitable for large-scale production; and the composite aerogel has good compression returning performance and can be used in field of construction of compressible super-capacitors.

Description

technical field [0001] The invention belongs to the technical field of new materials and supercapacitors, and in particular relates to a boron-doped graphene / polyaniline composite airgel and a preparation method thereof. Background technique [0002] As one of the most common conductive polymers, polyaniline has easy-to-obtain synthetic raw materials, simple synthesis methods, and much lower cost than polypyrrole and polythiophene. It also has the characteristics of high conductivity and good environmental stability. It is used in chemical sensors. , high-efficiency electrode materials, supercapacitors, anti-corrosion materials and other fields have a large number of applications. However, its poor mechanical properties, insolubility and infusibility, and poor processability limit the further application of polyaniline. [0003] Graphene is a kind of thin-layer material with two-dimensional nanostructure, which has excellent electrical and mechanical properties. Two-dimens...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/36H01G11/48H01G11/24
CPCH01G11/24H01G11/30H01G11/36H01G11/48Y02E60/13
Inventor 李亮杨清银喻航达喻湘华穆海梅黄华波张桥
Owner WUHAN INSTITUTE OF TECHNOLOGY
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