Water-soluble graphene used for super capacitor electrode material and preparation method thereof

A technology for supercapacitors and electrode materials, applied in the direction of hybrid capacitor electrodes, capacitors, electrolytic capacitors, etc., to achieve the effect of improving electrochemical performance and broad application prospects

Active Publication Date: 2012-07-04
超精(苏州)航空精密机械制造有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] So far, polystyrene sodium sulfonate has been used to covalently modify graphene, improve the water solubility of graphene and improve the specific

Method used

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  • Water-soluble graphene used for super capacitor electrode material and preparation method thereof

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Experimental program
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Example Embodiment

[0025] Example 1

[0026] According to the method reported in the literature, natural graphite is used to prepare single-layer or multi-layer graphite oxide through chemical oxidation (Composites Science and Technology 2009, 69, 1231);

[0027] Take 100 mg graphite oxide, 100 mg ethylene diamine, 150 mg 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and 150 mg 4-dimethylaminopyridine after ultrasonic dispersion for 30 min After the reaction is completed, the mixed solution is cooled to room temperature and vacuum filtered, washed with deionized water, and vacuum dried at 40°C for 24 hours to obtain ethylenediamine grafted graphene oxide;

[0028] The resulting reaction product of ethylenediamine grafted graphene oxide was added to 150 mg 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, 150 mg 4-dimethylaminopyridine and 100 g of unpurified acrylic acid mixture was dispersed ultrasonically for 15 minutes, and then reacted for 48 hours under stirring and 20...

Example Embodiment

[0031] Example 2

[0032] Take 100 mg of graphite oxide, 500 mg of ethylenediamine, 750 mg of 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride and 750 mg of 4-dimethylaminopyridine for ultrasonic dispersion for 30 min Then, the reaction was carried out at 100°C for 2 h; after the reaction was completed, the mixed solution was cooled to room temperature and vacuum filtered, washed with deionized water, and then vacuum dried at 100°C for 2 h.

[0033] The resulting reaction product was then re-injected in a mixed solution of 750 mg 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, 750 mg 4-dimethylaminopyridine and 500 g unpurified acrylic acid Disperse ultrasonically for 30 min, and then react for 2 h under stirring and 100 ℃. The product was cooled, vacuum filtered, washed with deionized water and dried under vacuum at 100°C for 2 h to obtain vinyl functionalized graphite oxide (GO-CH=CH 2 ).

[0034] The obtained vinyl functionalized graphite oxide (GO-CH=CH 2 ...

Example Embodiment

[0036] Example 3

[0037] Take 1g graphite oxide, 1g ethylenediamine, 1.5g 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride and 1.5g 4-dimethylaminopyridine after ultrasonic dispersion for 30 min. After the reaction was completed, the mixed solution was cooled to room temperature and vacuum filtered, washed with deionized water, and then vacuum dried at 80°C for 6 hours.

[0038] The resulting reaction product was then sonicated in a mixture of 1.5 g 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, 1.5 g 4-dimethylaminopyridine and 1000 g unpurified acrylic acid Disperse for 30 min, and then react for 4 h at 80 ℃ under stirring. The product was cooled, vacuum filtered, washed with deionized water and dried at 80℃ for 4 h to obtain vinyl functionalized graphite oxide (GO-CH=CH 2 ).

[0039] The obtained vinyl functionalized graphite oxide (GO-CH=CH 2 ) And 1 g of sodium styrene sulfonate were added to 500 mL of deionized water and transferred to a three-necked f...

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Abstract

The invention relates to water-soluble graphene used for a super capacitor electrode material and a preparation method thereof. The water-soluble graphene comprises the components of graphite oxide, 1-ethyl-(3-dimethyllaminopropyl)carbodiie hydrochlide, 4-dimethylaminopyridine, ethanediamine, crylic acid, sodium p-styrenesulfonate, an initiating agent and a reducing agent through reactions. The water-soluble graphene of a super capacitor electrode material has the advantages: a great amount of negative charges are grafted on the surface of graphene by performing covalent grafting modification on the graphene surface by using an ionic polymer, and graphene can be well dissolved in water through the principle of negative-negative charge repulsion; and meanwhile, the contact between electrolyte and the graphene can be enhanced through the covalently grafted polystyrolsulfon acid, the electrochemical properties of the graphene based capacitor are greatly improved, and the graphene has broader application prospects in the fields of super capacitors, solar cells and the like.

Description

technical field [0001] The invention relates to a water-soluble graphene used as an electrode material for a supercapacitor and a preparation method thereof. Background technique [0002] In 2004, Geim et al. of the University of Manchester in the United Kingdom prepared graphite-graphene with a single-layer structure for the first time by means of micromechanical exfoliation (see Novoselov K S, Geim A K, Morozov S V, et al . Science, 2004, 306, 666-669). Graphene has a very high specific surface area, excellent thermal conductivity, electrical conductivity and mechanical properties, and high-speed electron mobility at room temperature, and has potential application prospects in electronic devices, biomedicine and other fields. Recently, many researchers have devoted themselves to the synthesis of large-scale and large-scale graphene. The chemical redox method in the solution system is a low-cost, potential method for mass production of graphene. The process is to obtain g...

Claims

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Application Information

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IPC IPC(8): H01G9/042
CPCY02E60/13H01G11/36
Inventor 杜飞鹏王晶晶叶恩洲鄢国平李亮郭庆中
Owner 超精(苏州)航空精密机械制造有限公司
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