Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 capacitance characteristics of graphene-based supercapacitor electrode materials, and its related materials and preparation methods have not been reported.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Water-soluble graphene used for super capacitor electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] According to the method reported in the literature, single-layer or multi-layer graphite oxide was prepared by chemical oxidation using natural graphite (Composites Science and Technology 2009, 69, 1231);

[0027] Take 100 mg graphite oxide, 100 mg ethylenediamine, 150 mg 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and 150 mg 4-dimethylaminopyridine after ultrasonic dispersion for 30 min , reacted at 20°C for 48h; after the reaction was completed, the mixed solution was cooled to room temperature, vacuum filtered, washed with deionized water, and vacuum-dried at 40°C for 24 h to obtain ethylenediamine-grafted graphene oxide;

[0028] The graphene oxide grafted by the resulting reaction product ethylenediamine was added in 150 mg 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, 150 mg 4-dimethylaminopyridine and 100 g of unpurified acrylic acid mixture was ultrasonically dispersed for 15 min, and then reacted at 20 °C for 48 h with stirring....

Embodiment 2

[0032] Take 100 mg graphite oxide, 500 mg ethylenediamine, 750 mg 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and 750 mg 4-dimethylaminopyridine and ultrasonically disperse for 30 min Finally, react at 100°C for 2 h; after the reaction is completed, the mixed solution is cooled to room temperature, vacuum filtered, washed with deionized water, and vacuum-dried at 100°C for 2 h.

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

[0034] The resulting vinyl functionalized graphite oxide (GO-CH=CH 2 ) and 500 mg of sodium styrene sulfonate were added to 5...

Embodiment 3

[0037] Take 1 g of graphite oxide, 1 g of ethylenediamine, 1.5 g of 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and 1.5 g of 4-dimethylaminopyridine after ultrasonic dispersion for 30 min , and reacted at 80°C for 4 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 80°C for 6 h.

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

[0039] The resulting vinyl functionalized graphite oxide (GO-CH=CH 2 ) and 1 g of sodium styrene sulfonate were added to 500 mL of deion...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com