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

Preparation method and application of chemically-modified carbon material/graphene/RuO2 ternary composite material

A technology of chemical modification and composite materials, which is applied in the field of preparation of chemically modified carbon materials/graphene/RuO2 ternary composite materials, which can solve problems such as the collapse of ruthenium oxide crystal structure, the reduction of electrochemical performance, and the pulverization of materials. Achieve excellent stability, improve electrochemical performance, and prevent agglomeration

Inactive Publication Date: 2016-04-13
CENT SOUTH UNIV
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are two problems in the application of graphene / ruthenium oxide composite materials: (1) graphene / ruthenium oxide composite materials are structurally similar to the sheet structure of graphene, and curling and wrinkling will occur during its application, Affect its electrochemical performance; (2) Ruthenium oxide is a typical ceramic characteristic. During charging and discharging, the repeated intercalation and deintercalation of protons / electrons will cause local collapse of the ruthenium oxide crystal structure, which will eventually lead to partial pulverization of the material. , reducing its electrochemical performance

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 and application of chemically-modified carbon material/graphene/RuO2 ternary composite material
  • Preparation method and application of chemically-modified carbon material/graphene/RuO2 ternary composite material
  • Preparation method and application of chemically-modified carbon material/graphene/RuO2 ternary composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Put carbon dioxide nanotubes, graphite oxide, and ruthenium chloride into the hydrothermal reaction kettle according to a certain mass ratio (1:3:36), place them in an electric blast drying oven at 200°C for 15 hours, pour off the supernatant, and centrifuge repeatedly , washed with water to obtain the corresponding composite material powder, and annealed at 190 ° C for 3 hours.

[0050] figure 2 a is the carbon nanotube / reduced graphene oxide / RuO that embodiment 1 makes 2 SEM photographs of composite materials. From this figure, it can be seen that the addition of reduced graphene oxide introduces a multilayer wrinkled surface structure, and the RuO 2 The uniform dispersion on the larger substrate surface it provides.

Embodiment 2

[0052] Put oxidized activated carbon, graphite oxide, and ruthenium chloride into the hydrothermal reaction kettle according to a certain mass ratio (1:4:36), place it in an electric blast drying oven at 200°C for 15 hours, pour it to remove the supernatant, and repeat centrifugation and water washing The corresponding composite material powder was obtained and annealed at 190°C for 3h.

[0053] figure 2 B is activated carbon / reduced graphene oxide / RuO that embodiment 2 makes 2 SEM photographs of composite materials. It can be seen from the figure that there are many cracks and pores on the overall surface of the composite material, showing a loose state.

Embodiment 3

[0055] Put mesoporous carbon oxide, graphite oxide, and ruthenium chloride in a certain mass ratio (1:3:40) into the hydrothermal reactor, place it in an electric blast drying oven at 200°C for 15 hours, pour it to remove the supernatant, and centrifuge repeatedly , washed with water to obtain the corresponding composite material powder, and annealed at 200 ° C for 3 hours.

[0056] figure 2 C is the mesoporous carbon / reduced graphene oxide / RuO that embodiment 3 makes 2 SEM photographs of composite materials. It can be seen from the figure that oxygen-containing carbon materials and RuO 2 The combination is very tight, showing a tendency of uniform mixing and dispersion, RuO 2 In situ, it forms a honeycomb film on the surface of the carbon material.

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
Specific capacitanceaaaaaaaaaa
Current densityaaaaaaaaaa
Specific capacitanceaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method and application of a chemically-modified carbon material / graphene / RuO2 ternary composite material. The ternary composite material is prepared by mixing a dispersion liquid containing a chemically-modified carbon material and graphite oxide and a ruthenium chloride solution, placing the mixture liquid in a high-pressure reaction kettle for hydrothermal reaction to obtain a solid product, washing and drying the solid product, and then carrying out annealing processing. The prepared ternary composite material has the characteristics of high electrochemical activity, favorable stability, conductivity and cycle performance; and when the ternary composite material is used for preparing a capacitor electrode, the capacity of a capacitor can be improved, the power density is increased, and the rate performance is improved.

Description

technical field [0001] The invention relates to a chemically modified carbon material / graphene / RuO 2 The preparation method and application of the ternary composite material belong to the technical field of preparation of new capacitor electrode materials. Background technique [0002] In recent decades, many scholars have devoted themselves to the technical development and application basic research of electric energy storage devices. New electric double layer capacitors mostly use porous carbon materials with high specific surface area as electrodes, and the capacitance value at the electrode / solution interface is about 16-50 μF / cm when charging. 2 , Electrode capacitance up to 10 ~ 100F / g. Materials with pseudocapacitive activity store energy through oxidation-reduction reactions on the surface and inside the bulk phase. Generally speaking, the electrode capacitance is 10 to 100 times that of a carbon double layer of the same weight or volume. [0003] Amorphous RuO 2...

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): H01G11/86H01G11/24H01G11/30H01G11/46H01G11/36
CPCY02E60/13H01G11/86H01G11/24H01G11/30H01G11/36H01G11/46
Inventor 邹俭鹏易琛琦杨洪志冷娴
Owner CENT SOUTH UNIV
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