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A kind of floc polyaniline coated graphene composite material and its preparation method and application

A composite material and graphene technology, applied in the field of material synthesis and electrochemistry, can solve the problems of limiting the energy density of supercapacitors, achieve superior cycle charge and discharge performance, uniform distribution, and prevent easy agglomeration

Active Publication Date: 2016-01-06
福建宸琦新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the energy storage mechanism of graphene belongs to the electric double layer mechanism of absorbing anions and cations to store energy, its capacitance can only reach 100-250F / g, which seriously limits the energy density of supercapacitors.

Method used

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  • A kind of floc polyaniline coated graphene composite material and its preparation method and application
  • A kind of floc polyaniline coated graphene composite material and its preparation method and application
  • A kind of floc polyaniline coated graphene composite material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Step 1: Preparation of 4-aminobenzene diazonium salt, using diazotization reaction, first dissolve 0.01mol (1.08g) p-phenylenediamine in excess dilute hydrochloric acid (25ml, 1mol / L) at room temperature, and set the system Place in a low temperature reaction bath at 0℃, and then slowly add sodium nitrite aqueous solution (30%) until a slight excess. After 30 minutes of reaction, add the resulting solution to cold fluoroboric acid (HBF 4 ) In the solution, the precipitated crystals are filtered, washed, and fully dried at room temperature to obtain 4-aminobenzenetetrafluoroborate diazonium salt.

[0037] Step 2: Preparation of reduced graphene oxide (rGO), using the Improved-hummer method to disperse natural flake graphite (1g) in 50ml of concentrated sulfuric acid and phosphoric acid (v / v=9:1) mixed acid, and then at 0℃ In a low temperature bath, slowly add 6g of potassium permanganate with rapid stirring. After the addition, heat the system to 50°C for 10 hours. Cool the ...

Embodiment 2

[0041] Step 1: Preparation of 4-aminobenzene diazonium salt, using diazotization reaction, first dissolve 0.01mol (1.08g) p-phenylenediamine in excess dilute hydrochloric acid (25ml, 1mol / L) at room temperature, and set the system Place in a low temperature reaction bath at 5℃, and then slowly add sodium nitrite aqueous solution (30%) until a slight excess. After reacting for 30 minutes, add the resulting solution to cold sodium fluoroborate (NaBF 4 ) In the solution, the precipitated crystals are filtered, washed, and fully dried at room temperature to obtain 4-aminobenzenetetrafluoroborate diazonium salt.

[0042] Step 2: Preparation of reduced graphene oxide (rGO), using the Improved-hummer method to disperse natural flake graphite (1g) in 50ml of concentrated sulfuric acid and phosphoric acid (v / v=9:1) mixed acid, and then at 5℃ In a low temperature bath, slowly add 6g of potassium permanganate with rapid stirring. After the addition, heat the system to 50°C for 12 hours. Cool...

Embodiment 3

[0046] Step 1: Preparation of 4-aminobenzene diazonium salt, using diazotization reaction, first dissolve 0.01mol (1.08g) p-phenylenediamine in excess dilute hydrochloric acid (25ml, 1mol / L) at room temperature, and set the system Place it in a low temperature reaction bath at 2°C, then slowly add sodium nitrite aqueous solution (30%) until a slight excess. After 30 minutes of reaction, add the resulting solution to cold fluoroboric acid (HBF 4 ) Or sodium fluoroborate (NaBF 4 ) In the solution, the precipitated crystals are filtered, washed, and fully dried at room temperature to obtain 4-aminobenzenetetrafluoroborate diazonium salt.

[0047] Step 2: Preparation of reduced graphene oxide (rGO), using the Improved-hummer method to disperse natural flake graphite (1g) in 50ml of concentrated sulfuric acid and phosphoric acid (v / v=9:1) mixed acid, and then at 2℃ In a low temperature bath, slowly add 6g potassium permanganate with rapid stirring. After the addition, heat the system t...

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Abstract

The present invention provides a flocculent polyiline covering graphene composite material and its preparation methods and applications. The single -layer graphene is used as the skeleton.Connect the co -price bond between the layers.This composite material has good conductivity and high surface surface. As an electrode material, the electrode material has a high capacitor, and the stability of the covalent bonding guarantees the stability of the circulating and discharging of good electrodes.The application of capacitor electrode materials lays the foundation.

Description

technical field [0001] The invention belongs to the field of material synthesis and electrochemistry, and in particular relates to a flocculent polyaniline-coated graphene composite material and a preparation method and application thereof. Background technique [0002] Graphene is a new type of two-dimensional material composed of a single layer of independent carbon atoms closely packed into a hexagonal honeycomb crystal structure. Due to its unique electron transport properties, superior mechanical properties and high specific surface area, its potential application fields are very wide, so its discoverer won the Nobel Prize in 2010, and the subsequent research on it reached its climax. The unique two-dimensional conjugated structure of graphene endows it with good conductivity, which can greatly reduce the internal resistance of supercapacitors and improve the output power of the device. At the same time, compared with other carbon materials, the specific surface area of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/02C08G73/02C08K9/04C08K3/04H01G11/38H01G11/48
CPCC08G73/0266C08K3/04C08K9/02C08K9/04C08L2203/20H01G11/38H01G11/48C08L79/02C08K3/042H01G11/36Y02E60/13
Inventor 郑玉婴刘先斌
Owner 福建宸琦新材料科技有限公司