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

Bimetal sulfide and porous carbon fiber composite material as well as preparation method and application thereof in sodium ion battery

A technology of porous carbon fiber and sodium ion battery, which is applied in the direction of secondary battery, battery electrode, fiber chemical characteristics, etc. It can solve the problems of material structure collapse, slow charge and discharge rate, and large volume change, so as to maintain stability and ease electrode The effect of crushing and uniform fiber size

Pending Publication Date: 2022-03-04
GUILIN UNIVERSITY OF TECHNOLOGY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, because sodium ions have a larger radius than lithium ions, sodium-ion batteries still face the following shortcomings as a commercial energy storage material: 1. The kinetics of sodium ions is slow during intercalation / extraction, and a reasonable material structure needs to be constructed; 2. During the electrochemical reaction, the volume changes greatly, resulting in the collapse of the material structure; 3. Compared with lithium-ion batteries, sodium-ion batteries have lower energy density and slower charge and discharge rates

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
  • Bimetal sulfide and porous carbon fiber composite material as well as preparation method and application thereof in sodium ion battery
  • Bimetal sulfide and porous carbon fiber composite material as well as preparation method and application thereof in sodium ion battery
  • Bimetal sulfide and porous carbon fiber composite material as well as preparation method and application thereof in sodium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation method of bimetallic sulfide@porous carbon fiber composite material comprises the following steps:

[0043] (1) Put polyacrylonitrile and methyl methacrylate in N,N'-dimethylformamide, stir at 30°C for 12 hours to form a transparent solution, and obtain a mixed solution;

[0044] Wherein, the mass ratio of polyacrylonitrile to N,N'-dimethylformamide is 10:100; the mass ratio of methyl methacrylate to polyacrylonitrile is 60:100;

[0045] (2) Add iron acetamidoacetonate and antimony potassium tartrate to the mixed solution of step (1), and keep stirring for 10 hours to obtain a spinning solution;

[0046] Wherein, the mol ratio of ferric acetamidoacetonate and antimony potassium tartrate is 1:1;

[0047] (3) Electrospinning the spinning solution in step (2) to obtain electrospun nanofibers;

[0048] Among them, the electrospinning conditions are: using an electrospinning needle with an inner diameter of 0.4mm, advancing at a voltage of 17kV and a receiv...

Embodiment 2

[0052] The preparation method of bimetallic sulfide@porous carbon fiber composite material comprises the following steps:

[0053] (1) Put polyacrylonitrile and methyl methacrylate in N,N'-dimethylformamide, stir at 20°C for 18 hours to form a transparent solution, and obtain a mixed solution;

[0054] Wherein, the mass ratio of polyacrylonitrile to N,N'-dimethylformamide is 8:100; the mass ratio of methyl methacrylate to polyacrylonitrile is 80:100;

[0055] (2) Add iron acetamidoacetonate and antimony potassium tartrate to the mixed solution of step (1), and keep stirring for 15 hours to obtain a spinning solution;

[0056] Wherein, the mol ratio of ferric acetamidoacetonate and antimony potassium tartrate is 1:1;

[0057] (3) Electrospinning the spinning solution in step (2) to obtain electrospun nanofibers;

[0058] Among them, the electrospinning conditions are: using an electrospinning needle with an inner diameter of 1.15mm, advancing at a voltage of 22kV and a receiv...

Embodiment 3

[0062] The preparation method of bimetallic sulfide@porous carbon fiber composite material comprises the following steps:

[0063] (1) Put polyacrylonitrile and methyl methacrylate in N,N'-dimethylformamide, stir at 80°C for 5 hours to form a transparent solution, and obtain a mixed solution;

[0064] Wherein, the mass ratio of polyacrylonitrile to N,N'-dimethylformamide is 14:100; the mass ratio of methyl methacrylate to polyacrylonitrile is 40:100;

[0065] (2) Add iron acetamidoacetonate and antimony potassium tartrate to the mixed solution of step (1), and continue stirring for 5 hours to obtain a spinning solution;

[0066] Wherein, the mol ratio of ferric acetamidoacetonate and antimony potassium tartrate is 1:1;

[0067] (3) Electrospinning the spinning solution in step (2) to obtain electrospun nanofibers;

[0068] Among them, the electrospinning conditions are: using an electrospinning needle with an inner diameter of 0.27mm, advancing at a voltage of 13kV and a rec...

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
The inside diameter ofaaaaaaaaaa
The inside diameter ofaaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of preparation of sodium ion battery electrode materials, in particular to a bimetallic sulfide and porous carbon fiber composite material, a preparation method thereof and application of the bimetallic sulfide and porous carbon fiber composite material in a sodium ion battery. The preparation method comprises the following steps: packaging bimetallic ions by using electrostatic spinning porous carbon fibers, and carrying out annealing and vulcanization treatment to obtain a bimetallic sulfide and porous carbon fiber composite material; the porous structure can buffer the volume change caused by the reaction of metal sulfide and sodium ions, the strong conductivity of the carbon fiber provides an effective transmission path for electron transfer, and the synergistic effect of the bimetallic sulfide significantly improves the electrochemical performance, so that the carbon fiber has ultra-strong cycling stability when being used as the negative electrode of the sodium ion battery; therefore, the invention provides the sodium ion battery negative electrode material with high stability and high conductivity.

Description

technical field [0001] The invention relates to the technical field of preparation of electrode materials for sodium-ion batteries, in particular to a bimetallic sulfide@porous carbon fiber composite material and its preparation method and application in sodium-ion batteries. Background technique [0002] In recent years, with the advancement of science and technology, energy storage materials have been widely used in many fields of life, such as electric vehicles, mobile phones, computers and other portable electronic devices. So far, lithium-ion batteries have been widely used in these fields. From the perspective of resources, the demand for lithium is increasing year by year. However, the reserves of lithium in the earth's crust are not high (0.0065%), and 70% of lithium is concentrated in South America. Therefore, the development of new energy storage device materials is currently the biggest challenge. Scientists have found that sodium and lithium, which are in the sam...

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): H01M4/58H01M4/62H01M10/054D01F1/10D01F9/22
CPCH01M4/5815H01M4/625H01M10/054D01F9/22D01F1/10H01M2004/027H01M2004/021Y02E60/10
Inventor 曾亚萍张旗王柳肖剑荣王恒
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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