Check patentability & draft patents in minutes with Patsnap Eureka AI!

Preparation method of composite anode material for lithium-ion battery

A technology for lithium ion batteries and composite materials is applied in the field of preparation of composite negative electrode materials for lithium ion batteries, which can solve the problems of high irreversible capacity and poor cycle stability, and achieve rich lithium ion transport pathways, excellent electrochemical performance, and good application. Foreground effect

Inactive Publication Date: 2016-03-23
CHANGZHOU UNIV
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even so, polymer-derived ceramics still suffer from high irreversible capacity and poor cycle stability at this stage.

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
  • Preparation method of composite anode material for lithium-ion battery
  • Preparation method of composite anode material for lithium-ion battery
  • Preparation method of composite anode material for lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of a mixture of silicon-based precursor and graphite oxide:

[0031] Weigh 0.5g of GO and 0.25g of dicumyl peroxide and place them in 4.25ml of TTCS, ultrasonicate at 50KHz for 2h, then transfer to an agate mortar and grind for 30min to obtain a uniformly dispersed mixture of the three;

[0032] (2) Preparation of SiOC / graphene composite

[0033] Transfer the mixture obtained in step (1) to a ceramic boat, place it in the constant temperature zone of a vacuum tube furnace, feed high-purity nitrogen at a flow rate of 100ml / min as a protective atmosphere, and raise the temperature to 300°C at a heating rate of 10°C / min. ℃, keep warm for 2h; then heat up to 450°C at the same heating rate, keep warm for 1h; finally raise the temperature to 800°C at a heating rate of 10°C / min, keep warm for 0.25h, cool to room temperature 25°C, grind the product into powder to get SiOC / graphene composite.

[0034] The various properties of the obtained SiOC / graphene compo...

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
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of preparation of materials, in particular to a preparation method of a composite anode material for a lithium-ion battery. The method comprises the following steps: preparing a mixture of a silicon-based precursor and a graphite oxide; and carrying out thermal crosslinking on the mixture and then carrying out thermal reduction, so as to obtain an SiOC / graphene compound. The compound prepared by the method has an intercalation structure and a nanoscale; a volume change of SiOC particles in the charge-discharge process can be effectively reduced; meanwhile, a porous graphene sheet layer provides an efficient and abundant lithium ion transport pathway; the diffusion path is shortened; and the composite anode material has excellent electrochemical properties and a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a preparation method of a lithium-ion battery composite negative electrode material. Background technique [0002] Lithium-ion battery is an internationally recognized ideal chemical energy source. It has the advantages of high voltage, high specific energy, no memory effect, low self-discharge rate, long charge and discharge life, and no pollution. It has been widely used as an energy storage device for portable electronic products. . The negative electrode material is a key component of lithium-ion batteries, which directly affects the specific capacity of lithium-ion batteries. At present, the mainstream lithium battery anode material on the market is still graphite. Although it has excellent voltage characteristics, its capacity is too low. battery development. Although silicon has a high theoretical capacity, the huge volume change during charge a...

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): H01M4/36H01M4/58H01M4/583H01M4/136H01M4/133H01M4/1393H01M4/1397H01M10/0525
CPCH01M4/133H01M4/136H01M4/1393H01M4/1397H01M4/366H01M4/58H01M4/583H01M10/0525H01M2004/027H01M2220/30Y02E60/10
Inventor 任玉荣杨波丁建宁
Owner CHANGZHOU UNIV
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