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

Silicon-based composite, anode comprising same, and lithium secondary battery

A composite material and silicon-based technology, applied in the field of silicon-based composite materials, can solve problems such as increased efficiency and reduced capacity

Pending Publication Date: 2021-03-16
LG ENERGY SOLUTION LTD
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, there is a tendency that as the amount of doped metal elements increases, the efficiency increases but the capacity decreases

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
  • Silicon-based composite, anode comprising same, and lithium secondary battery
  • Silicon-based composite, anode comprising same, and lithium secondary battery
  • Silicon-based composite, anode comprising same, and lithium secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Si powder and silicon oxide (SiO 2 ) powder and magnesium (Mg) are heat-treated to simultaneously generate silicon oxide vapor and Mg vapor derived from Si and silicon oxide, thereby reacting reactants in the gas phase. In the case of Mg, increasing the heat treatment temperature from 700°C to 900°C at a rate of 5°C / min increased the rate of Mg vapor generation and thus the relative amount of Mg capable of reacting with silicon oxide vapor. The reacted composite material is precipitated by cooling, and it is pulverized with a jet mill to obtain silicon-based composite material particles having an average particle diameter (D) of about 5 μm. 50 ), and Mg is contained in the silicon-based composite material particles in a manner having a concentration gradient.

[0088] The resulting silicon-based composite was introduced into a tubular (tubular) furnace, and heated under argon (Ar) and methane (CH 4 ) under a mixed gas of chemical vapor deposition (CVD), thereby obtain...

Embodiment 2

[0093] A silicon-based composite material was prepared in the same manner as in Example 1 except that the heat treatment temperature for doping of Mg was increased from 750° C. to 850° C. at a rate of 3° C. / min.

[0094] As a result of determining the Mg content of the silicon-based composite material using the SEM-EDAX analysis instrument, it was found that, in the silicon-based particles, the central portion (Rc 10 ) The concentration of Mg at the place is about 7% by weight, and based on the total weight of the relevant part, the surface part (Rs 10 ) at a concentration of Mg of about 8.5% by weight.

Embodiment 3

[0096] A silicon-based composite material was prepared in the same manner as in Example 1 except that the heat treatment temperature for doping of Mg was increased from 650° C. to 950° C. at a rate of 10° C. / min.

[0097] As a result of determining the Mg content of the silicon-based composite material using the SEM-EDAX analysis instrument, it was found that, in the silicon-based particles, the central portion (Rc 10 The concentration of Mg at ) is about 1.5% by weight, and based on the total weight of the relevant part, the surface part (Rs 10 ) at a concentration of Mg of about 13.5% by weight.

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a silicon-based composite, comprising silicon-based particles; and at least one doping metal selected from the group consisting of Mg, Ca, Al, Na, and Ti, wherein thedoping metal is present with a concentration gradient from the particle center to the particle surface in the silicon-based particles.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2018-0098722, filed August 23, 2018, and Korean Patent Application No. 10-2018-0098723, filed August 23, 2018, the disclosures of which are incorporated by reference incorporated herein in its entirety. technical field [0003] The present invention relates to a silicon-based composite material, a negative electrode comprising the silicon-based composite material, and a lithium secondary battery. More particularly, the present invention relates to a silicon-based composite material comprising silicon-based particles having a concentration gradient of metal elements, A negative electrode and a lithium secondary battery comprising the silicon-based composite material as the negative electrode active material. Background technique [0004] With the development of technology of mobile devices and the increase in demand f...

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): H01M4/38H01M4/48H01M4/62H01M4/36H01M4/587H01M10/052C01B33/02C01B33/113
CPCC01B33/113Y02E60/10C01P2004/60H01M4/386H01M4/625H01M10/0525H01M4/366H01M4/483H01M2004/027H01M4/587H01M4/364H01M4/382H01M4/62H01M10/052C01B33/02C01P2002/52H01M4/133H01M4/134H01M4/505H01M4/525H01M10/0427H01M2004/028
Inventor 朴世美李龙珠李秀民
Owner LG ENERGY SOLUTION 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