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

Graphene oxide silicon-intercalated nanowire composite material and preparation method thereof

A technology of silicon nanowires and composite materials, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of poor electrical contact, high cycle performance and high specific capacity of the battery, Problems such as serious material pulverization, to achieve high specific capacity, good cycle performance, and easy industrialization

Active Publication Date: 2016-01-06
王凤鸣
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a graphene oxide silicon-embedded nanowire composite material with high capacity and good cycle performance, aiming to solve the serious volume expansion of the existing silicon-containing negative electrode materials during the cycle process, resulting in serious powdering of the material and severe battery life. The contact becomes poor, which makes the high cycle performance and high specific capacity of the battery incompatible

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
  • Graphene oxide silicon-intercalated nanowire composite material and preparation method thereof
  • Graphene oxide silicon-intercalated nanowire composite material and preparation method thereof
  • Graphene oxide silicon-intercalated nanowire composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] Correspondingly, the embodiment of the present invention also provides a method for preparing a graphene oxide silicon-embedded nanowire composite material, comprising the following steps:

[0028] S01. Graphene oxide pretreatment: use thermal evaporation or magnetron sputtering to deposit a catalyst on the surface of graphene oxide to obtain modified graphene oxide;

[0029] S02. Silicon nanowire deposition: the modified graphene oxide is placed in a closed device, a silicon source and hydrogen are introduced under negative pressure conditions, and the modified graphene oxide is deposited to obtain a surface with silicon deposited on the surface. Modified graphene oxide of nanowires;

[0030] S03. Carbon coating: a carbon source is introduced, and the silicon nanowires are subjected to carbon precipitation treatment under normal pressure conditions to obtain a graphene oxide embedded silicon nanowire composite material.

[0031]Specifically, in the above step S01, in ...

Embodiment 1

[0047] A graphene oxide silicon-embedded nanowire composite material, the graphene oxide silicon-embedded nanowire composite material includes modified graphene oxide, silicon nanowires and a carbon coating, wherein the modified graphene oxide is a surface Graphene oxide containing a catalyst, and the silicon nanowire is deposited on the surface of the graphene oxide through the catalyst, and the carbon coating layer is coated on the surface of the silicon nanowire.

[0048] The preparation method of described graphene oxide embedded silicon nanowire composite material comprises:

[0049] S11. Graphene oxide pretreatment: Take 0.5g of graphene oxide and put it into the sputtering equipment, the target material is Ti, and the vacuum degree is 1.4×10 -4 During stage sputtering, a small amount of Ti is deposited on the surface of the base material as a catalyst, and the sputtering time is 2 minutes;

[0050] S12. Silicon nanowire deposition: place the above-mentioned graphene ox...

Embodiment 2

[0055] A graphene oxide silicon-embedded nanowire composite material, the graphene oxide silicon-embedded nanowire composite material includes modified graphene oxide, silicon nanowires and a carbon coating, wherein the modified graphene oxide is a surface Graphene oxide containing a catalyst, and the silicon nanowire is deposited on the surface of the graphene oxide through the catalyst, and the carbon coating layer is coated on the surface of the silicon nanowire.

[0056] The preparation method of described graphene oxide embedded silicon nanowire composite material comprises:

[0057] S21. Graphene oxide pretreatment: Take 0.3g of graphene oxide and put it into the sputtering equipment. Deposit a small amount of Au as a metal catalyst with a sputtering time of 1 min;

[0058] S22. Silicon nanowire deposition: place the graphene oxide sputtered with Au on the surface in the tube furnace cavity, then close the flanges at both ends, vacuumize and fill with nitrogen gas for w...

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
Diameteraaaaaaaaaa
Lengthaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention is suitable for the field of lithium-ion battery anode materials, and provides a graphene oxide silicon-intercalated nanowire composite material and a preparation method thereof. The graphene oxide silicon-intercalated nanowire composite material comprises modified graphene oxide, silicon nanowire and a carbon coating layer, wherein the modified graphene oxide is the graphene oxide containing a catalyst on the surface; the silicon nanowire is deposited on the surface of the graphene oxide through induction of the catalyst; and the carbon coating layer coats the surface of the silicon nanowire.

Description

technical field [0001] The invention belongs to the field of negative electrode materials for lithium ion batteries, and in particular relates to a graphene oxide embedded silicon nanowire composite material and a preparation method thereof. Background technique [0002] With the development of science and technology, environmental issues have increasingly attracted the attention of the society, and green and environmentally friendly vehicles are increasingly favored by people, which in turn promotes the rapid development of electric vehicles and energy storage battery packs. Lithium-ion batteries are the mainstream energy storage tools. Traditionally, graphite systems are mainly used as negative electrode active materials. Such active materials have excellent electrochemical properties. However, since the theoretical specific capacity of the graphite-based negative electrode system is only 372mAh / g, it is difficult to meet the market demand for large-capacity and high-power...

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
IPC IPC(8): H01M4/36H01M4/38H01M4/587H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/38H01M4/386H01M4/587H01M4/625H01M10/0525Y02E60/10
Inventor 石佳光慈立杰丁显波茆胜
Owner 王凤鸣
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