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

Lithium ion battery and cathode material thereof

A technology for lithium-ion batteries and negative electrode materials, which is applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of unbalanced kinetic performance and cycle storage performance, and achieve good application prospects, good mass production, and low cost. cheap effect

Active Publication Date: 2018-06-12
CONTEMPORARY AMPEREX TECH CO LTD
View PDF15 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to: overcome the problem that the kinetic performance and cycle storage performance of existing lithium ion battery negative electrode materials cannot be balanced, and provide a lithium ion battery with ideal kinetic performance and storage cycle performance and its negative electrode material

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
  • Lithium ion battery and cathode material thereof
  • Lithium ion battery and cathode material thereof
  • Lithium ion battery and cathode material thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Adopt the following steps to prepare lithium-ion battery negative electrode material and battery:

[0037] Select artificial graphite modified by mechanical fusion (the degree of graphitization is 90%, the D50 particle size is 12 μm, and the specific surface area is 2.0m 2 / g), add the phenolic resin solution that mass fraction is 15%, stir for 2 hours, the stirrer frequency is 30Hz, the mixed solution is dried by the spray drying tower, the spray drying temperature is 550 ℃, and the working time is 2 hours, and the obtained particle diameter is 13μm, specific surface area 1.5m 2 / g of coated artificial graphite particles. Amorphous carbon chooses hard carbon, its degree of graphitization is 65%, D50 particle size is 7μm, specific surface area is 1.5m 2 / g. The coated artificial graphite and hard carbon are mixed according to the mass ratio of 90:10 to obtain the negative electrode material of lithium ion battery, and then the negative electrode material of lithium i...

Embodiment 2

[0039] Select natural graphite modified by mechanical fusion (the degree of graphitization is 96%, the D50 particle size is 13 μm, and the specific surface area is 2.5m 2 / g), add the phenolic resin solution, the mass fraction of the phenolic resin solution is 20%, stir for 3 hours, the stirrer frequency is 25Hz, the mixed solution is dried by the spray drying tower, the spray drying temperature is 450 ℃, and the working time is 3 hours, A particle size of 14 μm and a specific surface area of ​​1.7 m 2 / g of coated natural graphite particles. The choice of amorphous carbon is the same as in Example 1, and the above-mentioned coated natural graphite and hard carbon are mixed according to the mass ratio of 70:30. All the other are with embodiment 1.

Embodiment 3

[0041] Select artificial graphite modified by mechanical fusion (the degree of graphitization is 90%, the D50 particle size is 15 μm, and the specific surface area is 3m 2 / g), add the phenolic resin solution that mass fraction is 15%, stir for 2 hours, the stirrer frequency is 30Hz, the mixed solution is dried by the spray drying tower, the spray drying temperature is 550 ℃, and the working time is 2 hours, and the obtained particle diameter is 16μm, specific surface area is 2m 2 / g of coated artificial graphite particles. The degree of graphitization of amorphous carbon is 80%, the D50 particle size is 15μm, and the specific surface area is 1.0m 2 / g of hard carbon, the above-mentioned coated artificial graphite and hard carbon are mixed in a mass ratio of 50:50. All the other are with embodiment 1.

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
graphitization degreeaaaaaaaaaa
particle diameteraaaaaaaaaa
graphitization degreeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a lithium ion battery and a cathode material thereof. The lithium ion battery cathode material comprises graphite and amorphous carbon, wherein the graphitization degree of thegraphite is 90-96%; the average particle size D50 of the graphite is 2-25 [mu]m; the graphitization degree of the amorphous carbon is 65-80%; the average particle size D50 of the amorphous carbon is2-25 [mu]m. Compared with the prior art, the lithium ion battery cathode material prepared by mixing graphite and amorphous carbon which are relatively small in particle size is excellent in dynamic property, circulation property and storage property. The invention further discloses a lithium ion battery.

Description

technical field [0001] The invention belongs to the field of new energy materials. More specifically, the invention relates to a lithium-ion battery with excellent balance of kinetic performance, cycle performance and storage performance and its negative electrode material. Background technique [0002] Lithium-ion batteries have been widely studied and widely used in mobile phones, portable computers, In mobile electronic devices such as video cameras and cameras, traditional batteries are also gradually replaced in the fields of aviation, aerospace, navigation, artificial satellites, small medical instruments and military communication equipment. [0003] A lithium-ion battery generally includes a positive electrode, a negative electrode, a separator, and an electrolyte. Wherein, the negative electrode includes a negative electrode collector and a negative electrode membrane distributed on the negative electrode collector, and the negative electrode membrane includes a ne...

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): H01M4/36H01M4/587H01M4/62H01M10/0525
CPCH01M4/364H01M4/587H01M4/628H01M10/0525H01M4/366H01M4/625C01B32/21Y02E60/10H01M2004/021H01M2004/027H01M4/485H01M4/58H01M4/131H01M4/505H01M4/525H01M4/1393
Inventor 许文竹孙建庆卢光波孙帆邹启凡王升威
Owner CONTEMPORARY AMPEREX TECH CO LTD
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