Anode material of lithium ion battery and preparation method of anode material

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor cycle performance, large rebound of pole pieces, and low specific capacity, and achieve low cost, increased capacity, and high specific capacity Effect

Active Publication Date: 2016-01-06
湖南海容新材料有限责任公司
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a lithium ion battery negative electrode material and its preparation method to solve the problems of poor conductivity, low specific capacity, poor cycle performance, and large rebound of the lithium ion battery negative electrode material in the prior art

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
  • Anode material of lithium ion battery and preparation method of anode material
  • Anode material of lithium ion battery and preparation method of anode material
  • Anode material of lithium ion battery and preparation method of anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Add 20g polyvinyl alcohol organic polymer into 2L water and stir for 30 minutes;

[0020] (2) Add 200g of natural spherical graphite A into the solution containing polyvinyl alcohol and stir for 30 minutes;

[0021] (3) Add 34.0g copper chloride dihydrate into the above water solvent, and stir for half an hour;

[0022] (4) While stirring, add 1000mL, 0.4mol / L sodium hydroxide dropwise at 5mL / min to the mixed solution, and stir for 2 hours;

[0023] (5) Filter the above solution, and dry the precipitate at 100°C for 5 hours; under the protection of argon gas, heat treatment at 700°C, and naturally cool to 200°C, then let the material cool naturally under oxygen or air conditions, The lithium ion battery negative electrode material can be obtained.

[0024] from figure 1 It can be seen from the electron microscope photos in the graph that the surface of the graphite material is covered with a layer of nanoparticles. Using the EDS spectrum ( figure 2 ) and Table ...

Embodiment 2

[0028] (1) Add 10g polyvinyl alcohol organic polymer into 2L water and stir for 30 minutes;

[0029] (2) Add 300g of artificial graphite B into the solution containing polyvinyl alcohol and stir for 30 minutes;

[0030] (3) Add 50.0g of copper sulfate pentahydrate into the above water solvent and stir for half an hour;

[0031] (4) While stirring, add 1000mL, 0.2mol / L potassium hydroxide dropwise at 5mL / min to the mixed solution, and stir for 2 hours;

[0032] (5) Filter the above solution, and dry the precipitate at 100°C for 5 hours; under the protection of argon gas, heat treatment at 700°C, and naturally cool to 200°C, then let the material cool naturally under oxygen or air conditions, The lithium ion battery negative electrode material can be obtained.

Embodiment 3

[0034] (1) Add 15g polyvinylpyrrolidone organic polymer into 2L water and stir for 30 minutes;

[0035] (2) Add 200g of natural spherical graphite C into the solution containing polyvinyl alcohol and stir for 30 minutes;

[0036] (3) Add 36.3g of copper nitrate trihydrate into the above water solvent and stir for half an hour;

[0037] (4) While stirring, add 1000mL, 0.3mol / L ammonium carbonate dropwise at 3mL / min to the mixed solution, and stir for 2 hours;

[0038] (5) Filter the above solution, and dry the precipitate at 100°C for 5 hours; under the protection of argon gas, heat treatment at 700°C, and naturally cool to 200°C, then let the material cool naturally under oxygen or air conditions, The lithium ion battery negative electrode material can be obtained.

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 relates to an anode material of a lithium ion battery and a preparation method of the anode material, belonging to the field of an anode material of the lithium ion battery. The anode material of the lithium ion battery, provided by the invention, comprises graphite particles, wherein the surfaces of the graphite particles are coated with nano-copper particles, and the surfaces of the nano-copper particles are provided with a layer of copper oxide. The anode material has the advantages of high conductivity, high capacity, high compaction and favorable cycle performance, and the bounce rate of a pole piece is low.

Description

technical field [0001] The invention belongs to the field of negative electrode materials of lithium ion batteries, and in particular relates to a high conductivity, high-compression lithium ion battery negative electrode material and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, high specific energy, and good safety performance, and are widely used in 3C fields such as mobile communications and notebook computers. At present, the negative electrode materials of lithium batteries on the market are mainly graphite negative electrode materials. During the process of lithium ion intercalation and extraction, the volume change of graphite negative electrode materials is small, so it has good cycle performance. With the development of technology, especially the development of electric vehicles, lithium batteries have become the battery of choice for electric vehicle applications. However, existing g...

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): H01M4/36H01M4/38H01M4/48H01M4/587
CPCY02E60/10
Inventor 谢呈德龙波许晓落
Owner 湖南海容新材料有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap