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

Sandwich-structured composite graphene paper electrode material preparation method

A technology of composite graphite and electrode materials, applied in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, nanotechnology for materials and surface science, etc., can solve the problem of decreasing the proportion of active substances, increasing electrode resistance, and reducing active substances Utilization and other issues, to achieve good support, increase flexibility, and promote the effect of electron transfer

Active Publication Date: 2016-10-26
CHANGZHOU UNIV +1
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of binder and conductive agent in this electrode, the proportion of active material in the electrode decreases, and due to the non-conductivity of the binder, it can block the transport of charges and the flow of electrolyte to the electrode material and electrode surface. Diffusion, which not only reduces the utilization of the active material but also increases the resistance of the electrode

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
  • Sandwich-structured composite graphene paper electrode material preparation method
  • Sandwich-structured composite graphene paper electrode material preparation method
  • Sandwich-structured composite graphene paper electrode material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Add 30ml ethylene glycol in the cryptocrystalline graphite of 0.0210g, and carry out ball-milling stripping 8h to it, obtain stable homogeneous dispersion liquid;

[0022] (2) Take by weighing 1.0389g cobalt nitrate and be dissolved in 20ml ethanol;

[0023] (3) adding the metal salt solution in step (2) to (1), and adding 30ml of dilute nitric acid (25%);

[0024] (4) react the solution in step (3) at 120° C. for 6 h, adjust the pH to 9 after the reaction, and continue stirring for 2 h;

[0025] (5) The solution in step (4) is filtered through a microporous membrane to carry out layer-by-layer self-assembly, and after each washing with deionized water and ethanol for 3 times, it is dried at low temperature to form a sandwich structure composite graphene paper electrode material;

[0026] (6) Calcining the electrode material obtained in step (5) at 150° C. for 1 h, and then soaking it in the electrolyte solution to be tested for 12 h after calcining.

[0027] The ...

Embodiment 2

[0029] (1) Add 30ml of N-methylpyrrolidone to the flake graphite of 0.0300g, and carry out ball milling and peeling off for 8h to obtain a stable homogeneous dispersion;

[0030] (2) take by weighing 1.8320g nickel nitrate and be dissolved in the 20ml ethanol;

[0031] (3) adding the metal salt solution in step (2) to (1), and adding 25ml of dilute nitric acid (30%);

[0032] (4) react the solution in step (3) at 130° C. for 4 hours, adjust the pH to 9 after the reaction, and continue to stir for 2 hours;

[0033] (5) The solution in step (4) is filtered through a microporous membrane to carry out layer-by-layer self-assembly, and after each washing with deionized water and ethanol for 3 times, it is dried at low temperature to form a sandwich structure composite graphene paper electrode material;

[0034] (6) Calcining the electrode material obtained in step (5) at 100° C. for 1 h, and then soaking it in the electrolyte solution to be tested for 8 h after calcining.

[0035...

Embodiment 3

[0037] (1) Add 30ml of n-butanol to the dense crystalline graphite of 0.0450g, and carry out ball milling and peeling off for 8h to obtain a stable homogeneous dispersion;

[0038] (2) take by weighing 5.454g ferric nitrate and be dissolved in the 20ml n-butanol;

[0039] (3) adding the metal salt solution in step (2) to (1), and adding 40ml of dilute nitric acid (30%);

[0040] (4) react the solution in step (3) at 115° C. for 8 hours, adjust the pH to 8 after the reaction, and continue to stir for 2 hours;

[0041] (5) The solution in step (4) is filtered through a microporous membrane to carry out layer-by-layer self-assembly, and after each washing with deionized water and ethanol for 3 times, it is dried at low temperature to form a sandwich structure composite graphene paper electrode material;

[0042] (6) Calcining the electrode material obtained in step (5) at 170° C. for 0.5 h, and then immersing it in the electrolyte solution to be tested for 16 h after calcining. ...

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
Concentrationaaaaaaaaaa
Specific capacitance valueaaaaaaaaaa
Specific capacitance valueaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of preparation of a composite electrode material, and particularly relates to a sandwich-structured composite graphene paper electrode material preparation method. The sandwich-structured composite graphene paper electrode material is prepared in a one-step method. The method comprises specific steps: graphite is subjected to ultrasonic or ball milling stripping in an organic solvent, a metallic salt solution of a certain concentration is added for mixing until homogeneous phase, diluted HNO3 is then added, reaction at a temperature of 100 to 130 DEG C is carried out for 4 to 8 h, alkali is used for adjusting pH to be 8 to 10 after the reaction, after air pump filtration, washing and low temperature drying, the sandwich-structured composite graphene paper electrode material is obtained, calcination is carried out in order to improve the electrochemical properties of the electrode material, and the electrode material is immersed in an electrolyte after calcinations. Raw materials for preparaing the material of the invention is cheap and easy to obtain, the process is simple and convenient to operate, the production cost is low, industrial production is facilitated, and the prepared electrode material presents excellent electrochemical properties.

Description

technical field [0001] The invention belongs to the field of composite electrode material preparation, and in particular relates to a preparation method of a sandwich structure composite graphene paper electrode material. Background technique [0002] With the ever-increasing demand for sustainable energy and portable electronic devices, environmentally friendly energy storage devices have received extensive attention. Among them, supercapacitors are superior to lithium-ion batteries and other energy storage devices to a certain extent due to their long-term cycle stability, high current density, and high energy density, so they have great potential in energy storage applications. The most important task in constructing electrochemical capacitors is to explore electrode materials with high energy density and high current density. Due to the combination of the advantages of electric double layer capacitors and pseudocapacitors, hybrid capacitors have higher energy density, h...

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): H01G11/86H01G11/46H01G11/36B82Y30/00B82Y40/00
CPCY02E60/13H01G11/86B82Y30/00B82Y40/00H01G11/36H01G11/46
Inventor 陈海群何光裕邱琪玲王汉明陈卫东邵国柱
Owner CHANGZHOU 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