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

Negative electrode material for sodium ion battery, preparation method and application thereof

A sodium-ion battery and negative electrode material technology, applied in the field of materials, can solve the problems that restrict the practical use of sodium-ion batteries, and achieve the effects of adjustable disorder, low cost, high working voltage and energy density

Active Publication Date: 2019-07-23
INST OF PHYSICS - CHINESE ACAD OF SCI +1
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the research and development of some positive electrode materials have basically met the application requirements, but the negative electrode materials still restrict the practical application of sodium ion batteries

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
  • Negative electrode material for sodium ion battery, preparation method and application thereof
  • Negative electrode material for sodium ion battery, preparation method and application thereof
  • Negative electrode material for sodium ion battery, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] figure 1 The preparation method of the sodium ion battery negative electrode material based on carbon material and pitch provided for the embodiment of the present invention, its steps are as follows figure 1 shown, including:

[0048]Step 110, pulverizing and mixing one or more charcoal and / or bamboo charcoal and asphalt raw materials according to a mass ratio of 1:(0.05-0.2) to obtain coarse powder;

[0049] Specifically, the pulverization and mixing method is preferably mechanical mixing, including mechanical pulverization, ball milling, stirring, sieving and ultrasonic dispersion, and any combination of the above-mentioned methods. The time of mechanical mixing can be determined according to the selected precursor and the size of the required pulverized particle size.

[0050] Among them, charcoal includes one or more mixtures of white carbon, black carbon, activated carbon and machine-made carbon, bamboo charcoal includes one or more mixtures of carbonized materi...

Embodiment 2

[0061] This example provides the negative electrode material for a sodium ion battery prepared in Example 1 above.

[0062] According to the selected carbon material raw materials and the ratio of compounding with asphalt, the prepared negative electrode material has an orderly surface structure, disordered interior, and irregular block or vertical channel shape. Irregular massive carbon materials prepared by compounding charcoal and pitch, with a size between 2-10 microns, d 002 The value is between 0.37-0.40nm, the Lc value is between 1-4nm, and the La value is between 3-5nm; the vertical channel-shaped carbon material prepared by compounding charcoal and pitch, the length is between 5-30 microns, Pipe pore size between 2-3 microns, d 002 The value is between 0.36-0.38nm, the Lc value is between 1-4nm, and the La value is between 3-5nm; the irregular block carbon material prepared by compounding bamboo charcoal and pitch, the size is between 2-15 microns, d 002 The value ...

Embodiment 3

[0066] Weigh 2g of iron charcoal, mechanically grind 0.1g of petroleum asphalt, mix them evenly, and put them into a magnetic boat. First put it into a muffle furnace, raise the temperature to 260°C at a rate of 3°C / min, and keep it warm for 3 hours to obtain a heat-treated pitch-coated carbon material. Then put the heat-treated powder into a tube furnace with argon as a protective gas, raise the temperature to 1400°C at a rate of 3°C / min, and keep it warm for 2 hours; then naturally cool to room temperature, take out the material, and obtain the final compound The carbon material is the negative electrode material of the sodium ion secondary battery.

[0067] Its XRD pattern sees Figure 4 . The d of the carbon material can be obtained from the XRD pattern 002 = 0.392nm, L c = 2.15nm. Its Raman spectrum see Figure 5 , the L of the carbon material can be obtained from the Raman spectrum a = 3.18nm. Figure 6 The SEM image of the carbon material prepared in this exampl...

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
sizeaaaaaaaaaa
lengthaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

Disclosed in the present invention are a carbon material and asphalt-based negative electrode material for a sodium-ion battery, and a preparation method therefor and applications thereof. The negative electrode material for a sodium-ion battery is a composite carbon material whose surface is coated with an asphalt-based block-shaped or vertical channel-shaped material that is of an ordered carbon structure or whose morphology is irregular. Carbon materials and asphalt are used as precursor materials, the precursor materials are mechanically mixed and experience thermal treatment in the air, so that melted asphalt is coated on the surface of the carbon material, and then, the asphalt and the carbon materials experience carbonization and cracking reactions in an inert atmosphere at the same time, so as to obtain the composite carbon material having a structure whose surface is ordered and whose inside is disordered, the carbon materials comprising wood charcoal materials and bamboo charcoal materials in type, the wood charcoals comprising one or more mixtures obtained by mixing white charcoal, black charcoal, activated charcoal and machine-made charcoal, the bamboo charcoal materials comprising one or more carbonized material mixtures obtained by mixing phyllostachys pubescen, phyllostachys glauca, pleioblastus amarus, phyllostachys praecox and dendrocalamus membranaceus, and the asphalt materials being one or more mixtures obtained by mixing coal tar pitch, petroleum asphalt and natural bitumen.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a carbon material and asphalt-based sodium ion battery negative electrode material and a preparation method and application thereof. Background technique [0002] With the gradual depletion of fossil fuels and the increasing environmental pollution, the development and utilization of new energy carriers has attracted more and more attention. Secondary batteries, as the main chemical energy storage devices, play an important role in this field. Replacing fossil fuels with electricity as the main energy source for transportation will significantly reduce greenhouse gas emissions. Building and improving various power grid systems with wind energy, solar energy, geothermal energy and other renewable energy configurations will greatly increase the efficiency of renewable energy use. [0003] Sodium-ion batteries, with their advantages of rich sodium resources, wide distribution an...

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): H01M4/36H01M10/054H01M4/583H01M4/62
CPCH01M4/366H01M4/583H01M4/625H01M10/054H01M4/133H01M4/36H01M4/62Y02E60/10
Inventor 陆雅翔容晓晖秦东唐堃胡勇胜陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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