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A kind of highly wrinkled graphene material and preparation method thereof

A graphene and wrinkle technology, applied in the field of high wrinkle graphene materials and their preparation, can solve the problems of uneven graphene structure, high requirements on synthesis equipment, and decreased electrochemical performance, and achieve high energy density, high power density, low cost effect

Active Publication Date: 2018-07-13
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the preparation methods of highly wrinkled graphene in the prior art are complex in process, high in energy consumption, and have high requirements for synthesis equipment, which in turn leads to high production costs and is difficult to achieve industrialization, and the obtained graphene structure Inhomogeneity, leading to a decrease in its electrochemical performance

Method used

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  • A kind of highly wrinkled graphene material and preparation method thereof
  • A kind of highly wrinkled graphene material and preparation method thereof
  • A kind of highly wrinkled graphene material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] The preparation method of the highly wrinkled graphene material of the present embodiment comprises the steps:

[0054] 1) Prepare an aqueous ferric chloride solution with a concentration of 0.01mol / L, prepare an aqueous urea solution with a concentration of 0.02mol / L, slowly add 20mL of urea aqueous solution to 100mL of ferric chloride solution dropwise, and carry out Magnetic stirring, after the dropwise addition, let stand at room temperature for 1h, then react for 5h under the condition of heating in a water bath at 80°C, and obtain bright reddish-brown Fe(OH) 3 Sol, wherein the surface of ferric hydroxide colloidal particles is positively charged;

[0055] Weigh 2g of graphite powder and 2g of sodium nitrate, and add 100mL of concentrated sulfuric acid with a concentration of 98%, and stir for 15min in an ice bath at 0°C to make them evenly mixed, then add 12g of potassium permanganate, Leave to cool in an ice bath for 30 minutes, then stir and react in an ice bat...

Embodiment 2

[0060] The preparation method of the highly wrinkled graphene material of the present embodiment comprises the steps:

[0061] 1) Prepare an aqueous ferric chloride solution with a concentration of 0.2mol / L, prepare an aqueous urea solution with a concentration of 0.5mol / L, slowly add 10mL of urea aqueous solution to 100mL of ferric chloride solution, and carry out the process of adding Magnetic stirring, after the dropwise addition, let stand at room temperature for 5 hours, and then react for 10 hours under the condition of heating in a water bath at 70°C to obtain bright reddish-brown Fe(OH) 3 Sol, wherein the surface of ferric hydroxide colloidal particles is positively charged;

[0062] Weigh 2g of graphite powder and 2g of sodium nitrate, and add 100mL of concentrated sulfuric acid with a concentration of 98%, and stir for 15min in an ice bath at 0°C to make them evenly mixed, then add 12g of potassium permanganate, Leave to cool in an ice bath for 30 minutes, then stir...

Embodiment 3

[0066] The preparation method of the highly wrinkled graphene material of the present embodiment comprises the steps:

[0067] 1) Prepare an aqueous ferric chloride solution with a concentration of 0.5mol / L, prepare an aqueous urea solution with a concentration of 1mol / L, and slowly add 12.5mL of urea aqueous solution to 100mL of ferric chloride solution dropwise. Magnetic stirring, after the dropwise addition, let stand at room temperature for 10 hours, and then react for 0.5 hours under the condition of heating in a water bath at 90°C to obtain bright reddish-brown Fe(OH) 3 Sol, wherein the surface of ferric hydroxide colloidal particles is positively charged;

[0068] Weigh 2g of graphite powder and 2g of sodium nitrate, and add 100mL of concentrated sulfuric acid with a concentration of 98%, and stir for 15min in an ice bath at 0°C to make them evenly mixed, then add 12g of potassium permanganate, Leave to cool in an ice bath for 30 minutes, then stir and react in an ice ...

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Abstract

The invention relates to a highly wrinkled graphene material and a preparation method thereof, belonging to the technical field of electrode materials for energy storage devices. The preparation method of the highly wrinkled graphene material of the present invention comprises the following steps: pickling the Fe3O4 / graphene composite material and drying it. The preparation method of the highly wrinkled graphene material of the present invention selects iron oxide as a template to construct highly wrinkled graphene, and can use the redox reaction between the iron oxide and the carbon material to etch holes on the surface of the graphene , not only increases the specific surface area of ​​graphene, but more importantly, increases the channel for ion migration to achieve good supercapacitor energy storage performance.

Description

technical field [0001] The invention relates to a highly wrinkled graphene material and a preparation method thereof, belonging to the technical field of electrode materials for energy storage devices. Background technique [0002] Supercapacitors have the advantages of high energy density, high power density, long cycle life and low self-discharge rate, and are widely used in many fields. However, with the expansion of the application range of supercapacitors, the market has higher and higher requirements for the performance of supercapacitors, and the key factor affecting the performance of supercapacitors is the electrode material. Therefore, it is necessary to develop high-performance electrode materials to increase the energy density of supercapacitors. , Reducing its manufacturing cost is the focus of supercapacitor technology research. [0003] Graphene has become one of the research hotspots of supercapacitor electrode materials because of its unique physical and ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/36H01G11/46H01G11/86
CPCY02E60/13
Inventor 方华王力臻张林森张勇高可政高海丽
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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