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Graphene/polyaniline/iron oxide composite material applied to supercapacitor and preparation method thereof

A technology of supercapacitors and composite materials, applied in the field of graphene/polyaniline/iron oxide composite materials and their preparation, can solve the problem of high specific capacitance, and achieve the advantages of increasing specific capacitance, broad application prospects, and improving electrochemical performance. Effect

Active Publication Date: 2017-02-01
FAREAST KINGSTAR CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the iron oxide nanoparticles loaded on the surface of graphene are covered by the polyaniline coating layer, the electrochemical effects of each component cannot be fully exerted, resulting in a specific capacitance that is not as high as expected.

Method used

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  • Graphene/polyaniline/iron oxide composite material applied to supercapacitor and preparation method thereof
  • Graphene/polyaniline/iron oxide composite material applied to supercapacitor and preparation method thereof
  • Graphene/polyaniline/iron oxide composite material applied to supercapacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Preparation of graphite oxide: Take flake graphite (1g), sodium nitrate (0.2g) and concentrated sulfuric acid (30ml) into a 1000ml beaker, add potassium permanganate (1g) while stirring with a stirrer, continue after adding Stir for 14h; then add deionized water (100ml) therein, and then add concentration of 30% hydrogen peroxide (10ml), at this moment, the suspension is yellow, and the solid is separated by filtration or centrifugation, and dried, namely It is graphite oxide, ready for use.

[0027] 2. A graphene / polyaniline / iron oxide composite material applied to supercapacitors, which is composed of graphene, polyaniline, and iron oxide. The polyaniline is coated on graphene, and the iron oxide grows on graphene coated with polyaniline.

[0028] 3. The method for preparing the above-mentioned graphene / polyaniline / iron oxide composite material applied to a supercapacitor comprises the following steps:

[0029] (1) 0.005mol graphite oxide was ultrasonically dispe...

Embodiment 2

[0034] 1. Preparation of graphite oxide: Take flake graphite (1g), sodium nitrate (0.2g) and concentrated sulfuric acid (30ml) into a 1000ml beaker, add potassium permanganate (1g) while stirring with a stirrer, continue after adding Stir for 14h; then add deionized water (100ml) therein, and then add concentration of 30% hydrogen peroxide (10ml), at this moment, the suspension is yellow, and the solid is separated by filtration or centrifugation, and dried, namely It is graphite oxide, ready for use.

[0035] 2. A graphene / polyaniline / iron oxide composite material applied to supercapacitors, which is composed of graphene, polyaniline, and iron oxide. The polyaniline is coated on graphene, and the iron oxide grows on graphene coated with polyaniline.

[0036] 3. The method for preparing the above-mentioned graphene / polyaniline / iron oxide composite material applied to a supercapacitor comprises the following steps:

[0037] (1) 0.005mol graphite oxide was ultrasonically dispe...

Embodiment 3

[0041] 1. Put flake graphite (3g), sodium nitrate (1.1g) and concentrated sulfuric acid (90ml) into a 1000ml beaker, add potassium permanganate (4.5g) while stirring in a stirrer, and continue stirring for 16h after adding; Deionized water (350ml) was added thereto, and then 30% hydrogen peroxide (35ml) was added. At this time, the suspension was yellow, and the solid was separated by filtration or centrifugation, and dried for later use.

[0042] 2. A graphene / polyaniline / iron oxide composite material applied to supercapacitors, which is composed of graphene, polyaniline, and iron oxide. The polyaniline is coated on graphene, and the iron oxide grows on graphene coated with polyaniline.

[0043] 3. The method for preparing the above-mentioned graphene / polyaniline / iron oxide composite material applied to a supercapacitor comprises the following steps:

[0044] (1) 0.005mol graphite oxide was ultrasonically dispersed in 50ml deionized water for 30 minutes, aniline monomer was ...

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Abstract

The invention relates to a graphene / polyaniline / ferric oxide composite material applied to a supercapacitor. The graphene / polyaniline / ferric oxide composite material applied to the supercapacitor is formed by compounding graphene, polyaniline and ferric oxide, wherein the polyaniline is wrapped around the graphene, and the ferric oxide is grown on the graphene wrapped with the polyaniline. The obtained graphene / polyaniline / ferric oxide composite material takes full advantages of the functions of all the components, and not only makes use of the double-electrode-layer capacitive property of the graphene, but also makes use of the oxidoreduction electrochemical property of the polyaniline and the graphene, the specific capacitance of graphene-based electrode materials is increased, the cycle life reaches 5000 times, the electrochemical performance of graphene-based capacitors is improved greatly, and the graphene / polyaniline / ferric oxide composite material has the wider application prospects in the fields such as supercapacitors and solar cells.

Description

technical field [0001] The invention relates to a graphene / polyaniline / iron oxide composite material which can be used as an electrode of a supercapacitor and a preparation method thereof. Background technique [0002] Supercapacitor, a fast charging / discharging energy storage device between ordinary capacitors and secondary batteries, has the characteristics of short charging time, long service life, good temperature characteristics, energy saving and green environmental protection, etc. It is used in military and There are huge application prospects in civilian use. Supercapacitor electrode materials are divided into two categories, one is supercapacitor materials with electric double layer energy storage properties, such materials include activated carbon, carbon fiber, carbon nanotubes and graphene sheets and other carbon materials, such materials have 10 to 200F The specific capacitance per g has a long charge and discharge cycle life, which can reach more than 10,000 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/86
CPCY02E60/13
Inventor 张芳彭波
Owner FAREAST KINGSTAR CHEM