Check patentability & draft patents in minutes with Patsnap Eureka AI!

High-compaction rate type lithium ion battery negative electrode material and preparation method thereof

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problems of low energy density of lithium-ion batteries, limiting the application of lithium-ion batteries, and low performance of high-current charging and discharging , to achieve the effects of reducing glue consumption, easy quality control, and improving processing performance

Pending Publication Date: 2021-12-17
大连宏光锂业有限责任公司
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lithium-ion batteries mainly use graphite as the negative electrode material, and traditional graphite negative electrode materials have problems such as low compaction density and poor rate performance, which lead to low energy density, poor power performance, and low high-current charge and discharge performance of lithium-ion batteries, which limit lithium-ion batteries. Application of ion batteries in electric tools, digital and new energy vehicles

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
  • High-compaction rate type lithium ion battery negative electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Shaping the petroleum coke through coarse crushing and fine crushing to obtain a fine powder with a D50 particle size of 5 μm;

[0023] 2) mixing the fine powder obtained in step 1) with asphalt according to a ratio of 97:3 to obtain a mixed powder;

[0024] 3) The mixed powder obtained in step 2) is subjected to surface modification treatment in a drum furnace at 650° C. for 8 hours under the protection of a nitrogen atmosphere to obtain secondary particles with a D50 of 13 μm;

[0025] 4) The secondary particles obtained in step 3) were spheroidized in a spheroidizer with a rotating speed of 400r / min for 2 minutes to obtain a spheroidized material with a D50 particle size of 9 μm and D90 / D10=4.3;

[0026] 5) The spheroidized material obtained in step 4) is graphitized at a high temperature of 2600° C. for 20 hours to obtain a lithium ion battery negative electrode material.

Embodiment 2

[0029] 1) The pitch coke is firstly dried, coarsely crushed, finely crushed, and then shaped to obtain a fine powder with a D50 particle size of 10 μm;

[0030] 2) mixing the fine powder obtained in step 1) with asphalt according to a ratio of 95:5 to obtain a mixed powder;

[0031] 3) The mixed powder obtained in step 2) is subjected to surface modification treatment in a drum furnace at 600° C. for 10 h under the protection of a nitrogen atmosphere to obtain secondary particles with a D50 particle size value of 15 μm;

[0032] 4) The secondary particles obtained in step 3) were spheroidized for 4 minutes in a spheroidizer with a rotating speed of 600 r / min, and the D50 particle size value was 12 μm, and D90 / D10=6.1;

[0033] 5) The spheroidized material obtained in step (4) is graphitized at a high temperature of 3000° C. for 28 hours to obtain the lithium ion battery negative electrode material.

Embodiment 3

[0035] This embodiment provides a high compaction rate type lithium-ion battery negative electrode material production method, including the following steps:

[0036] 1) The needle coke is firstly dried, coarsely crushed, and finely crushed, and then shaped to obtain a fine powder with a D50 particle size of 8 μm;

[0037] 2) mixing the fine powder obtained in step 1) with asphalt according to a ratio of 90:10 to obtain a mixed powder;

[0038] 3) The mixed powder obtained in step 2) is subjected to surface modification treatment at 680° C. for 10 h under the protection of a nitrogen atmosphere to obtain secondary particles with a D50 particle size value of 14 μm;

[0039] 4) The secondary particles obtained in step 3) were spheroidized in a spheroidizer with a rotating speed of 800r / min for 5 minutes to obtain a D50 particle size of 10 μm, D90 / D10=5.1;

[0040] 5) The spheroidized material obtained in step 4) is graphitized at a high temperature of 3000° C. for 24 hours to o...

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
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of lithium ion battery negative electrode materials, and relates to a high-compaction rate type lithium ion battery negative electrode material and a preparation method thereof. The lithium ion battery negative electrode material is obtained by performing graphitization after performing powdering, mixing, spheroidizing, modification and secondary spheroidizing on an artificial graphite raw material. The requirement on equipment is low, large-scale production is extremely easy, and determination shows that the prepared lithium ion battery negative electrode material has wide particle size distribution, high compaction density and good rate capability.

Description

technical field [0001] The invention relates to a high compaction rate type lithium ion battery negative electrode material and a preparation method, belonging to the field of lithium ion battery negative electrode material preparation. Background technique [0002] Lithium-ion batteries mainly use graphite as the negative electrode material, and traditional graphite negative electrode materials have problems such as low compaction density and poor rate performance, which lead to low energy density, poor power performance, and low high-current charge and discharge performance of lithium-ion batteries, which limit lithium-ion batteries. Application of ion batteries in electric tools, digital and new energy vehicles. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a high compaction rate lithium-ion battery negative electrode material and its preparation method. The process is simple, the requirements for equipment ...

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): C04B35/532C04B35/52C01B32/205H01M4/587H01M10/0525
CPCC04B35/532C04B35/522C01B32/205H01M4/587H01M10/0525Y02E60/10
Inventor 王庆成宋爽韩团辉
Owner 大连宏光锂业有限责任公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com