Preparation method for supramolecular graphene load ferroferric oxide self-assembly body

A technology of triiron tetroxide and iron tetroxide, which is applied in the manufacture of hybrid/electric double layer capacitors, electrodes of hybrid capacitors, etc., can solve the problems of reduced specific surface, poor stability, low conductivity, etc. The effect of solving agglomeration and improving capacitance properties

Active Publication Date: 2015-09-09
YANGZHOU UNIV
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve Fe 3 o 4 Due to the low conductivity and poor stability of graphene and Fe 3 o 4 Combined to prepare composite materials, by combining Fe 3 o 4 Redox reaction with graphene's high specific surface area and high conductivity to improve electrochemical performance
[0006] However, the severe aggregation of graphene leads to a sharp decrease in its specific surface area, which limits its application in supercapacitors.

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
  • Preparation method for supramolecular graphene load ferroferric oxide self-assembly body
  • Preparation method for supramolecular graphene load ferroferric oxide self-assembly body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] 1. Preparation of graphene three-dimensional self-assembly

[0025] 1. Preparation of water-soluble β-polycyclodextrin:

[0026] Add 20g of β-cyclodextrin (β-CD) into 30wt% NaOH aqueous solution and stir at room temperature until β-CD dissolves to obtain a mixture. After the mixture was placed in a 30°C water bath for 5 hours, 9.64 mL of epichlorohydrin was added to the mixture, stirred for 24 h, and cooled to room temperature. After the salt is removed by dialysis, the solution is evaporated to dryness to obtain a white solid, which is dried in vacuum for 24 hours (vacuum degree is 1200-4800 Pa, drying temperature is 50-70°C), and water-soluble β-CD polymer (β- polycyclodextrin).

[0027] 2. Preparation of graphene-supported ferric oxide (rGOFe 3 o 4 ):

[0028] Disperse 10mg of graphite oxide powder into 10mL of ethylene glycol, and obtain a homogeneous solution by ultrasonication, then add 0.1g of polyvinylpyrrolidone, 0.2g of sodium acetate, and 0.108g of high ...

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 discloses a preparation method for a supramolecular graphene load ferroferric oxide self-assembly body, and belongs to the technical field of supramolecular chemistry. The method enables Fe3O4 to be disposed on the surface of graphene through the combination with the redox reaction of Fe3O4, thereby further improving the capacitive property. According to the invention, polyethylene glycol 2-adamantane is taken as a bridge agent, and then a supramolecular action force between cyclodextrin and adamantine molecules is employed. A prepared graphene @ ferroferric oxide three-dimensional assembly body not only solves a problem that the convergence of a graphene body causes the reduction of capacitance, but also greatly increases the specific capacitance which can reach 392.9 F / g, thereby indicating that the prepared graphene @ ferroferric oxide three-dimensional assembly body is good in application prospect for super-capacitors.

Description

technical field [0001] The invention belongs to the field of preparation of nanocomposite materials, in particular to the technical field of supramolecular chemistry, and in particular to the technical field of supercapacitor material preparation. Background technique [0002] Electrochemical capacitors (or known as supercapacitors) have attracted increasing attention in energy storage, mainly due to their high energy density and high specific capacitance, as well as good cycle life. Therefore, the electrochemical capacitor will effectively assist and even possibly replace batteries in many applications, such as in hybrid vehicles. [0003] So far, there are mainly carbon materials, transition metal oxides and conductive polymers. These three materials can generally be used as electrode materials for supercapacitors. Carbon materials are mainly used for electric double layer capacitors. The energy storage process of this material charge is very Faraday process, energy stora...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/36H01G11/46
CPCY02E60/13H01G11/86H01G11/24H01G11/30H01G11/36H01G11/46
Inventor 刁国旺蔡寅倪鲁彬张旺陈铭
Owner YANGZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap