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Preparation method and application of Prussian-blue-nanocrystal-loaded graphene composite material

A technology of Prussian blue and composite materials is applied in the preparation of graphene composite materials and the application field of supercapacitors, which can solve the problems of short cycle life, poor conductivity and small capacitance, and achieve simple operation, simple method, and reproducibility. good effect

Inactive Publication Date: 2015-11-04
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Combining it with graphene, which has a positively high specific surface area and outstanding electrical conductivity, will produce a significant synergistic effect and improve its shortcomings such as small capacitance, poor conductivity, and short cycle life.

Method used

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  • Preparation method and application of Prussian-blue-nanocrystal-loaded graphene composite material
  • Preparation method and application of Prussian-blue-nanocrystal-loaded graphene composite material
  • Preparation method and application of Prussian-blue-nanocrystal-loaded graphene composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Prepare 50mL of 0.1M aniline + 0.1M HCl solution

[0035] (2) Ultrasonic dispersion of 0.01g of graphene oxide in the solution of step (1) is denoted as M

[0036] (3) Preparation of 0.02M Fe(NO 3 ) 3 +0.02M K 3 Fe(CN) 6 +0.1M HCl solution 50mL, recorded as solution N

[0037] (4) Slowly add the solution of step (3) dropwise to the solution of step (2), and stir the solution of step (2) with a magnetic stirrer;

[0038] (5) After the dropwise addition is completed, let the solution react for 12 hours, filter, wash and dry.

[0039] (6) Get 0.1g graphene-Prussian blue nanocrystalline composite material and ultrasonically disperse it in 1mL N,N-dimethylformamide solution, then add 50 μ L 5% Nafion solution to this solution, take this nanocomposite material Drop 10 μL of the suspension on the surface of the glassy carbon electrode, and dry it under an infrared lamp;

[0040] (7) The prepared electrode was used as an electrode of a supercapacitor, and an electroc...

Embodiment 2

[0042] (1) Prepare 50mL of 0.1M aniline + 0.1M HCl solution

[0043] (2) Get 0.02g of graphene ultrasonically dispersed in step (1) solution, denoted as M

[0044] (3) Preparation of 0.02M Fe(NO 3 ) 3 +0.02M K 3 Fe(CN) 6 +0.1M HCl solution 50mL, recorded as solution N

[0045] (4) Slowly add the solution of step (3) dropwise to the solution of step (2), and stir the solution of step (2) with a magnetic stirrer;

[0046] (5) After the dropwise addition is completed, let the solution react for 12 hours, filter, wash and dry.

[0047] (6) Get 0.1g graphene-Prussian blue nanocrystalline composite material and ultrasonically disperse it in 1mL N,N-dimethylformamide solution, then add 50 μ L 5% Nafion solution to this solution, take this nanocomposite material Drop 10 μL of the suspension on the surface of the glassy carbon electrode, and dry it under an infrared lamp;

[0048] (7) The prepared electrode was used as an electrode of a supercapacitor, and an electrochemical tes...

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Abstract

The invention discloses a preparation method of a Prussian-blue-nanocrystal-loaded graphene composite material, and an application thereof in supercapacitors. The novel composite material is applied in supercapacitors. Under a condition of 5A / g, the capacitance can reach 350 F / g. The composite material has good cyclic stability. After 1000 cycles of continuous charging and discharging, the capacity loss is only 2%. According to the invention, Prussian blue nanocrystal direct synthesis on graphene is realized in a solvent. Graphene has good conductivity, and assists in improving the conductivity of the composite material. The novel composite material also has the advantages such as simple preparation process and low production cost. The novel composite material has great advantage in the application to supercapacitor.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a preparation method of a graphene composite material loaded with Prussian blue nanocrystals and its application in supercapacitors. Background technique [0002] As a new type of energy storage device that combines the advantages of traditional capacitors and secondary batteries, supercapacitors can provide higher energy density than traditional capacitors, as well as better power density and cycle life than secondary batteries. , Aerospace systems, communication engineering and microelectronic devices and other fields have been widely used. The electrode material is the core component of the supercapacitor, and its performance directly determines the performance of the capacitor. Conductive polymer materials, porous materials, etc. have been commonly used materials for supercapacitors. Combining it with graphene, which has a positively high specific surface area and out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C08K3/04C08K3/28C01C3/12H01G11/36H01G11/30B82Y30/00B82Y40/00
CPCY02E60/13
Inventor 邹勇进王庆勇向翠丽褚海亮邱树君徐芬孙立贤
Owner GUILIN UNIV OF ELECTRONIC TECH
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