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

Negative active material for rechargeable lithium battery and rechargeable lithium battery including same

A negative electrode active material, lithium battery technology, applied in active material electrodes, lithium batteries, non-aqueous electrolyte batteries, etc., can solve problems such as volume expansion, and achieve the effect of improving expansion characteristics and excellent cycle life characteristics

Active Publication Date: 2019-11-26
SAMSUNG SDI CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composite of silicon and carbon has a problem that volume expansion occurs significantly during charge and discharge

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 active material for rechargeable lithium battery and rechargeable lithium battery including same
  • Negative active material for rechargeable lithium battery and rechargeable lithium battery including same
  • Negative active material for rechargeable lithium battery and rechargeable lithium battery including same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Hereinafter, embodiments of the present invention are described in detail. However, these embodiments are exemplary, the present invention is not limited thereto, and the present invention is defined by the scope of the claims.

[0023] A negative electrode active material for a rechargeable lithium battery according to an embodiment of the present invention includes a composite of silicon and crystalline carbon, wherein the silicon has an average particle diameter (D50) of about 10 nm to about 150 nm, and the crystalline carbon has an average particle diameter of about 5 μm to about 5 μm. An average particle size (D50) of about 20 μm and an aspect ratio of about 4 to about 10.

[0024] As used herein, when no definition is otherwise provided, the average particle diameter (D50) means the particle diameter in the particle distribution at which the cumulative volume is about 50% by volume.

[0025] The silicon may have an average particle diameter (D50) of about 10 nm t...

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

Disclosed are a negative electrode active material for a rechargeable lithium battery and the rechargeable lithium battery including the same, the negative electrode active material is a composite ofsilicon and crystalline carbon, in which the silicon has an average particle diameter (D50) of about 10 nm to about 150 nm, the crystalline carbon has an average particle diameter (D50) of about 5 [mu]m to about 20 [mu]m, and an aspect ratio of about 4 to about 10.

Description

technical field [0001] A negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the negative active material are disclosed. Background technique [0002] Due to the increasing demand for batteries for mobile devices or portable batteries, technological development for realizing high capacity of rechargeable lithium batteries has been continuously conducted. [0003] As an electrolyte for a rechargeable lithium battery, a lithium salt dissolved in an organic solvent has been used. [0004] For positive active materials for rechargeable lithium batteries, lithium-transition metal oxides with structures capable of intercalating lithium ions, such as LiCoO, have been used. 2 , LiMn 2 o 4 、LiNi 1-x co x o 2 (0<x<1) etc. [0005] For the negative electrode active material, various carbon-based materials capable of intercalating / deintercalating lithium (such as artificial graphite, natural graphite, and hard carbon) or ...

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): H01M4/36H01M4/587H01M4/62H01M10/052H01M10/058
CPCH01M4/366H01M4/587H01M4/625H01M10/052H01M10/058H01M2220/30H01M2004/027H01M4/386H01M10/0525H01M4/362Y02E60/10Y02P70/50H01M4/364H01M4/133H01M4/1393H01M4/583
Inventor 金荣敏
Owner SAMSUNG SDI 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