Unlock instant, AI-driven research and patent intelligence for your innovation.

Anode active material, method of preparing the same, and anode and lithium battery containing the anode active material

A negative electrode active material, technology of scope, applied in the field of negative electrode active material, its preparation, and negative electrode and lithium battery including the negative electrode active material, can solve the problem of not actively proceeding and the like

Inactive Publication Date: 2008-06-04
SAMSUNG SDI (TIANJIN) BATTERY CO LTD
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, research on silicon thin films including crystalline and amorphous silicon has not been actively conducted, and thus more efficient lithium batteries using new silicon thin films including crystalline and amorphous silicon are still required

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 active material, method of preparing the same, and anode and lithium battery containing the anode active material
  • Anode active material, method of preparing the same, and anode and lithium battery containing the anode active material
  • Anode active material, method of preparing the same, and anode and lithium battery containing the anode active material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Silicon was deposited on a copper substrate using a silicon target with a diameter of 2 inches to form a silicon film with a thickness of 150 nm, and a Cu (16 μm) / Si (150 nm) negative electrode film was prepared. Set the initial vacuum pressure in the deposition to less than 5×10 -3 tor, then the 5 x 10 -3 Argon atmosphere in Torr and silicon deposited at a flow rate of 10 sccm under RF power of 50 watts to obtain a silicon film with a thickness of 150 nm.

Embodiment 2

[0072] Evaluation Example 2: TEM Analysis

[0073] The silicon thin films of Example 1 and Comparative Example 1 were analyzed using a transmission electron microscope (FE-TEM (300 kV), ion-milling).

[0074] The result is expressed in figure 2 A and 2B.

[0075] Such as figure 2 As shown in A and 2B, the images of the silicon thin films of Example 1 and Comparative Example 1 did not show any difference, and Debye-Schererer rings were not observed in either silicon thin film. Since no Debye-Scherer rings were observed in the image, the silicon thin film of Comparative Example 1 was amorphous silicon. However, although Debye-Schererer rings were not observed in the silicon thin film in Example 1, since the Raman spectrum of Example 1 was different from that of Comparative Example 1, the silicon thin film of Example 1 was not amorphous silicon. Therefore, it can be deduced that the silicon thin film of Example 1 contains nanoscale-sized crystals of a size smaller than 5 nm...

Embodiment 3

[0078] Evaluation Example 3: Raman spectroscopic analysis during charging and discharging

[0079] A charge / discharge test of the battery manufactured above was performed at room temperature (25° C.). The cells were charged at a constant current with a current density of 2100 mA / g. When the voltage of the battery reached 0.01V, it was charged at a constant voltage until the final current density was 210mA / g. Then, constant current discharge was performed at a constant discharge current density of 2100 mA / g until the voltage of the battery was 1.5V. Toscat3000 (TOYO, Japan) was used as charging and discharging equipment.

[0080] The Raman spectra of the silicon thin films produced in Example 1 and Comparative Example 1 were measured during charging and discharging, and structural changes of the silicon thin films due to charging and discharging were analyzed.

[0081] The silicon thin film samples of Example 1 and Comparative Example 1 were prepared as follows to be analyze...

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
Raman shiftaaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

Provided is a negative active material including a silicon thin film containing crystalline silicon, the Raman shift of the Raman spectrum is in the range of 490-500cm-1, and the full width at half maximum (FWHM) is in the range of 10-30cm-1 Inside. The volume of the negative electrode active material including the silicon thin film containing crystalline silicon does not change significantly during charging and discharging, so lithium batteries using the negative electrode active material can provide excellent capacity retention and long cycle life.

Description

technical field [0001] The present invention relates to a negative electrode active material, a preparation method thereof, and a negative electrode and a lithium battery comprising the negative electrode active material, and more particularly, to a negative electrode active material including crystalline silicon having negligible volume change, a preparation method thereof, And a negative electrode and a lithium battery including the negative electrode active material. Background technique [0002] A nonaqueous electrolyte secondary battery including a negative electrode composed of a lithium compound exhibits high voltage and high energy density, and thus it has been extensively studied. Because of its high capacity, lithium metal has been studied as an anode material. However, when metallic lithium is used as the anode material, lithium dendrites are deposited on the surface of metallic lithium during charging. Lithium dendrites reduce the charging / discharging efficienc...

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): H01M4/38H01M4/02H01M10/40H01M4/04C23C14/34C23C14/14H01M4/134H01M4/1395H01M10/05H01M10/0525
CPCC23C14/165H01M4/38Y02E60/122H01M4/1395H01M10/052H01M4/0421H01M4/386Y10T29/49108Y02E60/10E06B3/822E06B3/7001E06B2003/7049
Inventor 郑仁善柳永均李锡守
Owner SAMSUNG SDI (TIANJIN) BATTERY CO LTD
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