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

Phase-separated silicon-tin composition as negative electrode material of lithium ion and battery and lithium-sulfur battery

A technology of negative electrode materials and composites, applied in the field of preparation of negative electrode materials, can solve problems such as shortening the effective cycle capacity of batteries

Inactive Publication Date: 2015-06-17
GM GLOBAL TECH OPERATIONS LLC
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two problems shorten the effective cycle capacity of the battery

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
  • Phase-separated silicon-tin composition as negative electrode material of lithium ion and battery and lithium-sulfur battery
  • Phase-separated silicon-tin composition as negative electrode material of lithium ion and battery and lithium-sulfur battery
  • Phase-separated silicon-tin composition as negative electrode material of lithium ion and battery and lithium-sulfur battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] An exemplary and general description of lithium-ion battery 10 is described at figure 1 middle. The lithium-ion battery 10 shown here includes a plurality of thin rectangular electrochemical cells 12, each sandwiched by a metal current collector. The electrochemical cells 12 are stacked side by side in a modular configuration and, in this example, connected in parallel. Li-ion battery 10 may be formed from a plurality of similar electrochemical cells electrically connected in series or parallel to form a Li-ion battery exhibiting the desired voltage and current capabilities for a particular application. It should be understood that the lithium-ion battery 10 shown here is a schematic representation only. figure 1 The relative positions and physical interactions of the various components (i.e., electrodes and separators) that build up the electrochemical cell 12 are shown; the relative dimensions of the various components of the electrochemical cell are not meant to be...

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
thicknessaaaaaaaaaa
crystal sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

A composite of silicon and tin is prepared as a negative electrode composition having an increased capacity to lithium intercalation and durability for use with a metal current collector in cells of a lithium ion battery or a lithium-sulfur battery. This negative electrode material is formed so that the silicon is present in an amorphous phase alone in a matrix phase of crystalline tin. While the tin phase provides electrical conductivity, both phases are involved in the uptake and extraction of lithium during use of the cell and the two phases act together in minimizing mechanical damage to the material when the cell undergoes repeated charging and discharging cycles. Generally, approximately equal atomic ratios of tin and silicon may be used in the formation of phase-separated composition electrode materials.

Description

[0001] This application is a continuation-in-part of Serial No. 13 / 234209 filed September 16, 2011 (now US Patent Application Publication No. 2013-0071736). The entire content of this application is incorporated by reference. technical field [0002] The invention relates to the preparation of negative electrode materials suitable for lithium ion and lithium sulfur batteries. More specifically, the present invention relates to the preparation and use of composite particles comprising nanoscale islands of an amorphous silicon phase embedded in a crystalline or amorphous tin phase as negative electrode materials for use in lithium-ion batteries or Lithium-sulfur batteries insert and release lithium during operation. The combination of an appropriate atomic ratio of tin and silicon and the size of the individual phases in this composite enables the intercalation of higher quantities of lithium over repeated electrochemical cycles with less damage to the granular anode material. ...

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): H01M4/36H01M4/38H01M10/0525
CPCH01M4/362H01M4/386H01M4/387H01M10/0525H01M4/0426H01M4/13H01M4/134H01M4/364H01M4/38H01M4/5815H01M4/661H01M10/052H01M2004/021Y02E60/10
Inventor X·肖A·K·萨赫德夫M·W·费尔布吕格P·刘J·S·王
Owner GM GLOBAL TECH OPERATIONS LLC
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