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

Carbon-nitride/graphene composite electrode material and preparation method thereof

A graphene composite and electrode material technology, applied in the direction of hybrid capacitor electrodes, can solve the problems of composite material energy density, low power density, graphene material agglomeration and wrinkling, and difficulty in large-scale production, so as to achieve safe and reliable production process, The effect of small material polarization and short production cycle

Active Publication Date: 2018-12-14
CHONGQING JIAOTONG UNIVERSITY
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the carbon-based composite electrode materials prepared by the current existing technology, the composite electrode materials based on metal oxides, and the organic polymer composite electrode materials all have high requirements for material preparation, difficult material compounding, and the prepared composite materials are limited. The energy density and power density are low, and it is also difficult to achieve large-scale production; in graphene electrode materials, there are still technical problems such as agglomeration and wrinkles of graphene materials. On the other hand, the application of carbon nitride to electrode materials still blank in this field

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
  • Carbon-nitride/graphene composite electrode material and preparation method thereof
  • Carbon-nitride/graphene composite electrode material and preparation method thereof
  • Carbon-nitride/graphene composite electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: A kind of preparation method of the composite electrode material of carbon nitride and graphene

[0025] (1) Preparation of graphene oxide

[0026] Weigh 0.3g of graphite powder (300 mesh) and place it in a round bottom flask, mix 20ml of concentrated sulfuric acid, 0.5g of ammonium persulfate and graphite powder evenly, and stir magnetically at 90°C for 120min. After the reaction is over, transfer the above system to an ice-water mixture and cool to 3°C, slowly add 1.5g of potassium permanganate to the solution at a speed of 600r / min, and wait until it is completely dissolved (at this time, the solution becomes deep green), and then transfer the system to a constant temperature environment of 35°C for 120min with magnetic stirring. Continue to add 2ml of 30% hydrogen peroxide and 40ml of deionized water to the above system, and continue stirring for 90min at a rotation speed of 600r / min. After the stirring was completed, the system was taken out and ult...

Embodiment 2

[0047] Embodiment 2: A kind of preparation method of the composite electrode material of carbon nitride and graphene

[0048] (1) Preparation of graphene oxide

[0049] Weigh 0.4g of graphite powder (600 mesh) and place it in a round bottom flask, mix 18ml of concentrated sulfuric acid, 0.8g of ammonium persulfate and graphite powder evenly, and stir magnetically at 95°C for 130min. After the reaction is over, transfer the above system to an ice-water mixture and cool to 2°C, slowly add 1.6g of potassium permanganate to the solution at a speed of 500r / min, and wait for the solution to dissolve completely (at this time, the solution becomes deep green), and then transfer the system to a constant temperature environment at 40°C for 100 min with magnetic stirring. Continue to add 2.2ml of 30% hydrogen peroxide and 60ml of deionized water to the above system, and continue stirring for 80min at a rotation speed of 700r / min. After the stirring was completed, the system was taken o...

Embodiment 3

[0055] Embodiment 3: A kind of preparation method of the composite electrode material of carbon nitride and graphene

[0056] (1) Preparation of graphene oxide

[0057] Weigh 0.3g of graphite powder (500 mesh) and place it in a round bottom flask, mix 18ml of concentrated sulfuric acid, 0.6g of ammonium persulfate and graphite powder evenly, and stir magnetically at 95°C for 110min. After the reaction is over, transfer the above system to an ice-water mixture and cool to 3°C, slowly add 1.7g of potassium permanganate to the solution at a speed of 400r / min, and wait for the solution to dissolve completely (at this time, the solution becomes deep green), and then transfer the system to a constant temperature environment of 30°C for 100min with magnetic stirring. Continue to add 2.2ml of 30% hydrogen peroxide and 55ml of deionized water to the above system, and continue to stir for 90min at a rotational speed of 600r / min. After the stirring was completed, the system was taken 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

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
particle size (mesh)aaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A carbon nitride / graphene composite electrode material comprises the following components in percentage by weight: 0.1 to 1.0 percent of carbon nitride and 99.0 to 99.9 percent of graphene oxide, wherein the carbon nitride is used as a framework structure and the graphene oxide is wrapped on the surface of the carbon nitride to form a core-shell structure. The invention has good electrochemical performance, having a high Faraday capacitance, Faraday capacitance is 221 F / g at a scan speed of 5 mV / s, the stability of battery and electrode is good in short-range charging and discharging, in ac impedance teste, Materials reflect a small impedance value, materials in the charge and discharge tests show a small polarization, and compared with the traditional complex treatment of composite materials, the composite method is simple, safe and reliable production process, large capacitance, preparation process will not meet graphene aggregation phenomenon, preparation is simple, production cycleis short, and market promotion and application are facilitated.

Description

technical field [0001] The invention relates to a carbon nitride / graphene composite electrode material and a preparation method thereof. Background technique [0002] The development of battery materials and capacitor materials, as the primary factor determining the performance of related electronic components, has always attracted people's attention. The development of new electrical materials has always been used as a criterion for judging whether electronic components can be replaced. In recent years, supercapacitors, which have emerged in recent years, have attracted people's attention because of their large capacitance, high energy density, fast charging and long life, and their special advantages in serving as energy storage components and meeting high-power output; With the rise of supercapacitors, electrode materials for capacitors have also become a hot topic for research and development. Among various materials for making supercapacitors, the emerging material gra...

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): H01G11/30H01G11/36H01G11/24
CPCH01G11/24H01G11/30H01G11/36Y02E60/13
Inventor 郭小峰王宏波蒙晶王丽影向阳开周平
Owner CHONGQING JIAOTONG UNIVERSITY
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