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Highly folded grapheme material and preparation method thereof

A graphene and wrinkle technology, which is applied in the field of highly wrinkled graphene materials and its preparation, can solve the problems of graphene structure inhomogeneity, electrochemical performance decline, and high requirements for synthesis equipment, and achieve high energy density, high power density, and low cost. low effect

Active Publication Date: 2016-12-21
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Highly folded grapheme material and preparation method thereof
  • Highly folded grapheme material and preparation method thereof
  • Highly folded grapheme 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 this embodiment includes the following steps:

[0054] 1) Prepare an aqueous solution of ferric chloride with a concentration of 0.01 mol / L, prepare an aqueous solution of urea with a concentration of 0.02 mol / L, and slowly add 20 mL of urea aqueous solution to 100 mL of ferric chloride solution. Stir magnetically. After the addition is complete, let it stand for 1 hour at room temperature, and then react for 5 hours under the heating condition of a water bath at 80°C to obtain a bright red-brown Fe(OH) 3 Sol, in which the surface of the iron hydroxide colloidal particles is positively charged;

[0055] Weigh 2g graphite powder and 2g sodium nitrate, add 100mL of 98% concentrated sulfuric acid, stir for 15min in an ice bath at 0℃ to make it uniform, then add 12g potassium permanganate, Let stand and cool for 30 minutes under ice bath conditions, and then stir and react for 2 hours under ice bath conditions to...

Embodiment 2

[0060] The preparation method of the highly wrinkled graphene material of this embodiment includes the following steps:

[0061] 1) Prepare an aqueous solution of ferric chloride with a concentration of 0.2mol / L, prepare an aqueous solution of urea with a concentration of 0.5mol / L, and slowly add 10mL of urea aqueous solution to 100mL of ferric chloride solution. Stir magnetically. After the addition is complete, let it stand at room temperature for 5 hours, and then react for 10 hours under the heating condition of a water bath at 70°C to obtain bright red-brown Fe(OH) 3 Sol, in which the surface of the iron hydroxide colloidal particles is positively charged;

[0062] Weigh 2g graphite powder and 2g sodium nitrate, add 100mL of 98% concentrated sulfuric acid, stir for 15min in an ice bath at 0℃ to make it uniform, then add 12g potassium permanganate, Let stand and cool for 30 minutes under ice bath conditions, then stir and react for 2 hours under ice bath conditions to obtain a ...

Embodiment 3

[0066] The preparation method of the highly wrinkled graphene material of this embodiment includes the following steps:

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

[0068] Weigh 2g graphite powder and 2g sodium nitrate, add 100mL of 98% concentrated sulfuric acid, stir for 15min in an ice bath at 0℃ to make it uniform, then add 12g potassium permanganate, Let stand and cool for 30 minutes in an ice bath, then stir and react for 2 hours in an ice bath to obtain a suspension; s...

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Abstract

The invention relates to a highly folded grapheme material and a preparation method thereof, belonging to the technical field of energy storage device electrode materials. The preparation method comprises the steps of carrying out pickling of a Fe3O4 / grapheme composite material, and drying the material to obtain the highly folded grapheme material. According to the preparation method, an iron oxide is selected as a template agent to construct highly folded grapheme, the redox reaction between the iron oxide and a carbon material can be used, a hole is etched at the surface of the grapheme, the specific surface area of grapheme is increased, more importantly, the channels of ion migration are increased, and the good super capacitor energy storage performance is realized.

Description

Technical field [0001] The invention relates to a high-fold graphene material and a preparation method thereof, and belongs 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, the development of high-performance electrode materials to improve 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 chemical properties. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/36H01G11/46H01G11/86
CPCY02E60/13H01G11/86H01G11/24H01G11/36H01G11/46
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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