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

A kind of preparation method of the hollow microsphere material that is used for lithium-sulfur battery cathode

A technology of hollow microspheres and lithium-sulfur batteries, applied in nanotechnology for materials and surface science, lithium batteries, battery electrodes, etc., can solve problems such as uneven distribution, difficult growth of shell materials, and uneven size. To achieve the effect of improving reaction kinetics, realizing cycle stability, and improving cycle stability

Active Publication Date: 2021-08-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent with the publication number CN 109378449A and the patent with the publication number CN 109621997A, the prepared hollow NiCo 2 S 4 Because the material does not use a template, the overall size of the material is not uniform, and the sacrificial layer is not used as an intermediate link, which makes the growth of the shell material more difficult and unevenly distributed

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
  • A kind of preparation method of the hollow microsphere material that is used for lithium-sulfur battery cathode
  • A kind of preparation method of the hollow microsphere material that is used for lithium-sulfur battery cathode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for preparing a hollow microsphere material for a positive electrode of a lithium-sulfur battery, comprising the steps of:

[0040] Step 1. Dissolve 0.5g-1.5g polyvinylpyrrolidone in 500ml-1000ml water and stir in a three-necked flask;

[0041] Step 2, taking 50g-100g of styrene and adding it to the solution treated in step 1, stirring, and feeding nitrogen gas at the same time to form an emulsion;

[0042] Step 3, the emulsion is heated to 50°C-70°C in an oil bath, and 5ml-15ml of aqueous solution is added to the emulsion, which contains 0.5g-1.5g of 2,2-azobis(2-methylpropyl Imido) dihydrochloride;

[0043] Step 4, blow nitrogen, react at a temperature of 50°C-100°C for 24h, and obtain precipitate A;

[0044] Step 5, washing the precipitate A produced in step 4 with alcohol and then freeze-drying to obtain PS pellets;

[0045] Step 6. Dissolve 2-3g PS pellets in 20-30ml water and stir evenly to form latex;

[0046] Step 7, 0.5-1g cetyltrimethylammonium brom...

Embodiment 2

[0056] Step 1. Dissolve 0.5g of polyvinylpyrrolidone in 500ml of water and stir in a three-necked flask;

[0057] Step 2, 50g of styrene is added to the solution treated in step 1, stirred, and nitrogen gas is introduced at the same time to form an emulsion;

[0058] Step 3, the emulsion is heated to 50 degrees by an oil bath, and 5ml of an aqueous solution is added to the emulsion, and the aqueous solution contains 0.5g of 2,2-azobis(2-methylpropylimidium) dihydrochloride;

[0059] Step 4, feed nitrogen, react at 100 degrees for 24 hours, and obtain precipitate A;

[0060] Step 5, washing the precipitate A produced in step 4 with alcohol and then freeze-drying to obtain PS pellets;

[0061] Step 6. Dissolve 2.5g PS pellets in 20% water and stir evenly to form latex;

[0062] Step 7, 0.5g of cetyltrimethylammonium bromide (CTAB), 5 grams of ethanol, and 2 grams of ammonia were dissolved in 8ml of water;

[0063] Step 8, adding the latex solution obtained in step 6 dropwise ...

Embodiment 3

[0072] Step 1. Dissolve 1g of polyvinylpyrrolidone in 500ml of water and stir in a three-necked flask;

[0073] Step 2, 50g of styrene is added to the solution treated in step 1, stirred, and nitrogen gas is introduced at the same time to form an emulsion;

[0074] Step 3, the emulsion is heated to 50 degrees by an oil bath, and 5ml of an aqueous solution is added to the emulsion, and the aqueous solution contains 0.5g of 2,2-azobis(2-methylpropylimidium) dihydrochloride;

[0075] Step 4, under nitrogen, react at 100 degrees for 24 hours to obtain precipitate A;

[0076] Step 5, washing the precipitate A produced in step 4 with alcohol and then freeze-drying to obtain PS pellets;

[0077] Step 6. Dissolve 2.2g PS pellets in 20% water and stir evenly to form latex;

[0078] Step 7, 0.5g of cetyltrimethylammonium bromide (CTAB), 5 grams of ethanol, and 2 grams of ammonia were dissolved in 8ml of water;

[0079] Step 8, adding the latex solution obtained in step 6 dropwise int...

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
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a hollow microsphere material used for the positive electrode of a lithium-sulfur battery, and relates to the technical field of nanomaterial preparation. The invention includes the following steps: Step 1. Prepare polystyrene (PS) pellets, which are used as Template; step 2, using tetraethyl orthosilicate (TEOS) to grow SiO on PS beads 2 shell, forming a PS@SiO2 core-shell structure; step 3, in PS@SiO2 2 Deposited NiCo on the surface 2 o 4 , forming PS@SiO 2 @NiCo 2 o 4 Structure; step 4, using tetrahydrofuran to remove the PS bead template to form SiO 2 @NiCo 2 o 4 Hollow structure; step 5, using NaOH to remove SiO 2 , and the NiCo 2 o 4 Vulcanization, forming hollow NiCo 2 S 4 Hollow material: The hollow core-shell material prepared by the present invention uses PS pellets as a template, and has uniform size and no obvious agglomeration phenomenon.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, and more specifically relates to a method for preparing a hollow microsphere material used for the positive electrode of a lithium-sulfur battery. Background technique [0002] With the rapid development of human society, the demand for energy has reached unprecedented heights. Traditional fossil energy can no longer adapt to the development of the times due to limited capacity and environmental pollution. The development of new energy storage materials with high efficiency, high energy and environmental protection has become a development trend. need. The theoretical specific capacity of lithium-sulfur batteries reaches 1675mAh / g, and the energy density is as high as 2600Wh / kg. It has great potential in meeting the growing demand of portable devices, electric vehicles and grid energy storage systems, and the cost of sulfur alone is low. The environment has no pollution and othe...

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 Patents(China)
IPC IPC(8): H01M4/58H01M10/052
CPCB82Y30/00B82Y40/00C01G53/006C01P2004/01C01P2004/03C01P2004/34C01P2004/62C01P2006/40H01M4/5815H01M10/052Y02E60/10
Inventor 王艳位华亮陈泽祥杨欢李兰于常浩
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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