Negative electrode material and battery comprising same

A negative electrode material and battery technology, applied in the direction of battery electrodes, non-aqueous electrolyte battery electrodes, circuits, etc., can solve problems such as difficulty in blocking electrolyte penetration, insufficient density, lack of interaction force, etc., to achieve enhanced interface stability. Density, increasing electronic and ionic conductivity effects

Pending Publication Date: 2022-03-04
ZHUHAI COSMX BATTERY CO LTD
View PDF11 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to improve the lack of interaction between the carbon coating layer and the silicon material in the negative electrode material of the prior art, and it is usually not dense enough to prevent the penetration of the electrolyte, etc., the present invention provides a negative electrode material and a material comprising the negative electrode material. battery

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 and battery comprising same
  • Negative electrode material and battery comprising same
  • Negative electrode material and battery comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Synthesis of negative electrode materials: Fe-Si alloy powder (72#, GB / T 2272-2009) and natural flake graphite (325 mesh) were mixed in a mass ratio of 5:1 in an Ar atmosphere and then added to a high-energy ball mill tank After sealing, high-energy ball milling at a speed of 300 rpm for 6 hours was used to obtain the negative electrode material of Example 1.

Embodiment 2

[0078] Synthesis of negative electrode materials: Fe-Si alloy powder (72#, GB / T 2272-2009) and microcrystalline graphite (1000 mesh) were mixed in a mass ratio of 5:1 in an Ar atmosphere and then added to a high-energy ball mill tank After sealing, high-energy ball milling at a speed of 300 rpm for 6 hours was used to obtain the negative electrode material of Example 2.

Embodiment 3

[0080]Synthesis of negative electrode materials: Fe-Si alloy powder (72#, GB / T 2272-2009) and microcrystalline graphite (1000 mesh) were mixed in a mass ratio of 9:1 in an Ar atmosphere and then added to a high-energy ball mill tank After sealing, high-energy ball milling at a speed of 300 rpm for 6 hours was used to obtain the negative electrode material of Example 3.

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention provides a negative electrode material and a battery comprising the same. Strong chemical bond interaction is formed between the carbon coating layer and the metal-silicon alloy in the negative electrode material, so that the interface stability of the carbon coating layer and the metal-silicon alloy can be enhanced, the content of surface coating carbon and the density of the carbon coating layer are increased on the basis, and the negative electrode material has high gram volume and high specific surface area. And the battery can have better cycle retention rate and expansion rate.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a negative electrode material and a battery comprising the negative electrode material. Background technique [0002] Due to the advantages of high energy density, high charge and discharge efficiency, and good cycle performance, batteries are widely used in new energy technology fields such as portable electronic products, electric vehicles, and energy storage power stations. As one of the important components of batteries, anode materials affect the energy density, service life and safety performance of batteries, and are one of the key technical fields in battery research. [0003] At present, the negative electrodes of commercialized batteries mainly use graphite materials, and their theoretical lithium storage capacity is 372mAh / g. However, with the continuous progress and improvement of technology, the actual capacity of graphite materials is close to its theoretical value, which s...

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): H01M4/36H01M4/38H01M4/62H01M4/13
CPCH01M4/625H01M4/386H01M4/366H01M4/13Y02E60/10
Inventor 范洪生刘春洋李素丽李俊义
Owner ZHUHAI COSMX BATTERY CO LTD
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