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

a kind of nh 2 -rgo/mno 2 Composite materials, preparation methods and applications

A composite material, nh2-rgo technology, applied in nanotechnology for materials and surface science, hybrid capacitor electrodes, nanotechnology, etc., can solve the problems of poor overall performance and poor conductivity of the structure, and achieve regular morphology, Improvement of electrical conductivity and reduction of agglomeration

Active Publication Date: 2020-10-13
HEFEI UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Transition metal oxides have high specific capacitance (10 to 100 times that of carbon materials) and good stability, but the shortcomings of poor conductivity and dense structure make their overall performance poor

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
  • a kind of nh <sub>2</sub> -rgo/mno <sub>2</sub> Composite materials, preparation methods and applications
  • a kind of nh <sub>2</sub> -rgo/mno <sub>2</sub> Composite materials, preparation methods and applications
  • a kind of nh <sub>2</sub> -rgo/mno <sub>2</sub> Composite materials, preparation methods and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation process of this embodiment is as follows:

[0025] (1) Prepare graphite oxide by the Hummers method, wash the obtained graphite oxide solution with 1:1 ethanol and deionized water until the supernatant is colorless, and disperse it in deionized water to obtain an aqueous graphite oxide solution of 0.5 to 1.0 g / L ;

[0026] (2) Stir 20 mL of 1 g / L graphite oxide aqueous solution and 50 mL of dimethylformamide in a water bath at 35 °C for 1 hour, then add 100 mL of p-phenylenediamine solution to the above reaction, and raise the temperature to 80 °C , reflux and stir for 10 hours, wash the obtained reactant with ethanol and deionized water until the supernatant is colorless and neutral, disperse the obtained precipitate into deionized water, and obtain aminated reduced graphite oxide with a concentration of 1 g / L ene NH 2 -rGO aqueous solution; the concentration of p-phenylenediamine solution is 3g / L, sonicated in an ultrasonic environment for 30-60 minu...

Embodiment 2

[0029] In this embodiment, 0.395 g of potassium permanganate was added to 100 mL of deionized water to obtain a 0.025 mol / L potassium permanganate aqueous solution, and 10 mL of aminated reduced graphene oxide NH with a concentration of 0.1 g / L was taken. 2 -rGO aqueous solution mixed with 40mL potassium permanganate aqueous solution, ultrasonicated for more than 30 minutes, transferred to the reaction kettle for hydrothermal reaction, the temperature of the hydrothermal reaction was 180°C, and the time was 15 hours. Wash with water and ethanol solution until the supernatant is colorless, dry the precipitate in vacuum at 60°C, and grind to obtain NH 2 -rGO / MnO 2 powder.

[0030] Other implementations are the same as in Example 1.

Embodiment 3

[0032] In this embodiment, 0.395 g of potassium permanganate was added to 100 mL of deionized water to obtain a 0.025 mol / L potassium permanganate aqueous solution, and 10 mL of aminated reduced graphene oxide NH with a concentration of 0.5 g / L was taken. 2 -rGO aqueous solution mixed with 40mL potassium permanganate aqueous solution, ultrasonicated for more than 30 minutes, transferred to the reaction kettle for hydrothermal reaction, the temperature of the hydrothermal reaction was 180°C, and the time was 15 hours. Wash with water and ethanol solution until the supernatant is colorless, dry the precipitate in vacuum at 60°C, and grind to obtain NH 2 -rGO / MnO 2 powder.

[0033] Other implementations are the same as in Example 1.

[0034] The composite material that embodiment 1 is prepared carries out SEM analysis as figure 1 As shown, it can be seen from the figure that the microscopic morphology of the composite material is good, uniform and orderly, and the dispersion o...

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 an NH2-rGO / MnO2 composite material, a preparation method and an application thereof. Graphite oxide GO is prepared and the prepared graphite oxide is processed into an aqueoussolution; the aqueous graphite oxide solution and dimethyl formamide are stirred in a water-bath manner, p-phenylenediamine is added into the solution for reaction, the temperature rises, backflow stirring is carried out, an obtained reactant is washed by ethyl alcohol and deionized water until supernate becomes colorless and neutral, an obtained precipitate is dispersed into the deionized water,and then an aminated reduced graphene oxide NH2-rGO solution is obtained; and according to a hydrothermal method, potassium hypermanganate KMnO4 and the prepared NH2-rGO solution are mixed and stirredand then ultrasonic processing is carried out, the mixture is transferred to a reaction still, so that an NH2-rGO / MnO2 composite material is prepared. According to the invention, the prepared aminated graphene enables the conductivity of the manganese dioxide to be improved; because of the amino existence, the electrochemical activity of the material is enhanced and the infiltration property withthe electrolyte is improved; the microscopic appearance of the manganese dioxide can be improved; the specific surface area is increased; the dispersion of the materials is enhanced; and the performance of the super-capacitor is improved.

Description

technical field [0001] The invention relates to a preparation method of a capacitor material, in particular to a kind of NH 2 -rGO / MnO 2 Composite materials, preparation methods and applications. Background technique [0002] Energy is a precious resource that people rely on for survival. With the continuous increase of population and the accelerated consumption of energy, finding new energy and energy storage devices is one of the effective ways for people to solve the problem of energy depletion. In the process of researching new energy devices to replace internal combustion engines, research and development of hybrid power, fuel cells, and chemical battery products and applications have been carried out, and certain results have been achieved. However, due to their inherent shortcomings such as short service life, poor temperature characteristics, environmental pollution by chemical batteries, complex systems, and high cost, there has been no good solution. As a new en...

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 Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/46B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/30H01G11/36H01G11/46Y02E60/13
Inventor 陈星刘家琴赵伟吴玉程
Owner HEFEI UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com