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

One-dimensional Bi-doped carbon nanowire composite material and preparation method and application thereof

A technology of composite materials and carbon nanowires, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of volume expansion, low specific capacity, poor cycle stability, etc., and achieve excellent performance, The synthesis method is simple and the material performance is uniform

Inactive Publication Date: 2017-01-04
HUAZHONG UNIV OF SCI & TECH
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a one-dimensional bismuth-doped carbon nanowire composite material and its preparation method and application. The purpose is to use electrospinning technology and BiCl 3 Combining reduction methods, the active material Bi is embedded in carbon nanowires to prepare a bismuth-doped carbon nanowire composite material of the present invention, and it is applied to lithium ion and sodium ion battery negative electrode materials, thus solving the problem of prior art Bi Composite materials used as negative electrode materials for lithium-ion and sodium-ion batteries have problems such as poor cycle stability, low specific capacity, and volume expansion of alloying during cycling.

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
  • One-dimensional Bi-doped carbon nanowire composite material and preparation method and application thereof
  • One-dimensional Bi-doped carbon nanowire composite material and preparation method and application thereof
  • One-dimensional Bi-doped carbon nanowire composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The preparation method of the one-dimensional Bi / C nanowire composite material proposed by the present invention comprises the following steps:

[0032] (1) Mix bismuth chloride, polyacrylonitrile (PAN), and N,N-dimethylformamide (DMF) according to the mass ratio of 0.07~0.11:0.07~0.11:1 to prepare the bismuth salt precursor spinning silk liquid;

[0033] (2) Spinning the precursor spinning solution obtained in step (1) under high pressure to obtain a precursor one-dimensional nanowire;

[0034] (3) calcining the one-dimensional nanowires obtained in step (2) in air, and obtaining nanowires with stable structure after cooling; Nanowire structure;

[0035] (4) Calcining the structurally stable nanowires obtained in step (3) at a high temperature in a hydrogen / argon atmosphere to obtain a one-dimensional Bi / C nanowire composite lithium-ion and sodium-ion battery negative electrode material.

[0036] The present invention adopts electrospinning technology and BiCl 3 Co...

Embodiment 1

[0043] a kind of like figure 1 The preparation method of the shown one-dimensional Bi / C nanowire composite material comprises the following steps:

[0044] (1) Preparation of spinning precursor solution: Bismuth chloride, PAN and DMF were weighed in a mass ratio of 0.09:0.09:1, stirred for 24 hours, and mixed evenly to obtain a spinning precursor solution.

[0045] (2) Preparation of nanowire precursor: the spinning precursor solution prepared in the above step (1) was spun in an electrospinning device with a voltage of 18KV and a bolus rate of 1mm / min.

[0046] (3) Preparation of nanowires with stable structure: place the nanowire precursor described in (2) above for calcination in air at a calcination temperature of 280° C. for 2 hours to obtain nanowires with stable structure.

[0047] (4) Preparation of one-dimensional Bi / C nanowire composite material: the structurally stable nanowire obtained in the above (3) is placed in a tube furnace and fed with a hydrogen / argon gas ...

Embodiment 2

[0050] a kind of like figure 1 The preparation method of the shown one-dimensional Bi / C nanowire composite material comprises the following steps:

[0051] (1) Preparation of spinning precursor solution: Bismuth chloride, PAN and DMF were weighed in a mass ratio of 0.07:0.11:1, stirred for 24 hours, and mixed evenly to obtain a spinning precursor solution.

[0052] (2) Preparation of nanowire precursor: the spinning precursor solution prepared in the above step (1) was spun in an electrospinning device with a voltage of 15KV and a bolus rate of 0.5mm / min.

[0053] (3) Preparation of nanowires with stable structure: place the nanowire precursor described in (2) above for calcination in air at a calcination temperature of 270° C. for 1 h to obtain nanowires with stable structure.

[0054] (4) Preparation of one-dimensional Bi / C nanowire composite material: put the nanowire with stable structure obtained in the above (3) into a tube furnace for calcination (10:90, Vol), and The...

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
sizeaaaaaaaaaa
sizeaaaaaaaaaa
widthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a one-dimensional Bi-doped carbon nanowire composite material and a preparation method and application thereof. The one-dimensional Bi-doped carbon nanowire composite material is homogeneous in structure, regular and uniform in bismuth particle and completely embedded into carbon nanowires. The preparation method has the advantages of simple materials, availability to the materials, low price, simple synthesis method and environmental friendliness. The one-dimensional Bi-doped carbon nanowire composite material is high in cycling stability and specific capacity and capable of effectively inhibiting alloying volume expansion during cycling when used as lithium ion and sodion battery cathode materials, and is as high as 300 mAh g<-1> in capacity after 500 circles of cycling under the condition of 100 mA g<-1> and as high as 290 mAh g<-1> in capacity after 500 circles of cycling under the condition of 100 mA g<-1> when used as the lithium ion battery cathode material.

Description

technical field [0001] The invention belongs to the fields of energy storage materials, new energy sources and electrochemistry, in particular to a one-dimensional bismuth-doped carbon nanowire composite material, its preparation method and application. Background technique [0002] With the increasing demand for energy in the world, oil, coal, natural gas, etc. are rapidly consumed as main energy sources, and their combustion will also produce greenhouse gases and other toxic and harmful substances (SO 2 , NO 2 etc.), therefore, finding renewable green energy is the most urgent task at present. [0003] As a new energy source in the 1990s, lithium-ion batteries have attracted widespread attention and are widely used in electric vehicles, mobile devices, power station energy storage and other fields. However, with the continuous development in recent decades, the serious consumption of lithium resources, the difficulty in the preparation and synthesis of lithium metal, and...

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): H01M4/36H01M4/38H01M4/587H01M4/62H01M10/0525H01M10/054B82Y30/00
CPCB82Y30/00H01M4/362H01M4/38H01M4/587H01M4/625H01M10/0525H01M10/054Y02E60/10
Inventor 朱明强尹红
Owner HUAZHONG UNIV OF SCI & TECH
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