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

Lithium sulfur battery positive electrode material with high sulfur load as well as preparation method and application thereof

A cathode material and a technology for sulfur batteries, which are applied to cathode materials of high-sulfur-loaded lithium-sulfur batteries, cathode materials of lithium-sulfur batteries, and application fields of lithium-sulfur batteries, can solve the problems of low sulfur load and the like, and achieve low cost of raw materials and high operation efficiency. The effect of strong performance and simple preparation method

Active Publication Date: 2018-06-29
CENT SOUTH UNIV
View PDF3 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the problem of low sulfur loading of graphene in the process of preparing lithium-sulfur cathode materials in the prior art, the application of graphene in high-performance lithium-sulfur batteries is limited. The first purpose of the present invention is to provide a The sulfur loading capacity is as high as 60-88%, and the sulfur loading stability is good. Graphene / sulfur composite cathode material for lithium-sulfur batteries

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
  • Lithium sulfur battery positive electrode material with high sulfur load as well as preparation method and application thereof
  • Lithium sulfur battery positive electrode material with high sulfur load as well as preparation method and application thereof
  • Lithium sulfur battery positive electrode material with high sulfur load as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) g-C 3 N 4 Preparation of:

[0038] Select melamine as the raw material, in the air atmosphere, at a heating rate of 10°C / min, keep at 550°C for 4 hours, fully grind the product, and then the g-C of the sheet can be obtained. 3 N 4 ;

[0039] 2) preparation of graphene oxide:

[0040] Graphene oxide was prepared by a modified Hummers method. Add 23mL of 98% concentrated sulfuric acid into the round bottom flask, slowly add 0.5g of sodium nitrate under ice bath and stirring conditions, after the sodium nitrate is completely dissolved, add 1g of expanded graphite powder; after 20min, slowly add in batches 3g potassium permanganate, control the temperature below 5°C. After 30 minutes, transfer the round-bottomed flask to an oil bath, and continue stirring for 2 hours at 35°C; control the temperature at 98°C, add 46 mL of deionized water to the flask, and continue stirring for 30 minutes; then add 30 mL of 3% H 2 o 2 ; Centrifugal washing with 5% hydrochloric acid...

Embodiment 2

[0053] 1) g-C 3 N 4 The preparation is as in Example 1;

[0054] 2) the preparation of graphene / sulfur composite material (GS) is as embodiment 1;

[0055] 3) Weigh 0.04g g-C 3 N 4 and 0.59g sodium thiosulfate were ultrasonically dispersed in 45mL deionized water; 31mL of GO dispersion (2.5mg mL -1 ) ultrasonically dispersed for 30min, added to the above dispersion, and continued ultrasonically for 30min; add 10mL of 1molL -1 After fully mixing, transfer it into a 100mL polytetrafluoroethylene high-temperature reaction kettle, and conduct a hydrothermal reaction at 160°C for 14h. After the reaction was completed and the reactor was cooled, a cylindrical black solid was obtained. After the surface was washed with deionized water, it was placed in a vacuum drying oven at 60° C. for 24 hours.

[0056] from image 3 It can be determined in the thermogravimetric analysis that the sulfur content in the prepared graphene / sulfur composite is about 71%.

[0057] Figure 9 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
cycle efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention discloses a lithium sulfur battery positive electrode material with high sulfur load as well as a preparation method and application thereof. The preparation method of the lithium sulfurbattery positive electrode material with high sulfur load comprises the following step of performing hydrothermal reaction on dispersion liquid containing g-C3N4, graphene oxide, sodium thiosulfate and inorganic acid, thereby obtaining a sulfur / graphene composite material with sulfur load amount of 60-88%. The method is simple to operate, is low-cost, is beneficial for industrial production; andthe composite material is taken as the lithium sulfur battery positive electrode material for preparing a lithium sulfur battery, so that circulating stability is good and specific discharge capacityis high.

Description

technical field [0001] The invention relates to a lithium-sulfur battery cathode material, in particular to a high-load sulfur lithium-sulfur battery cathode material, and the use of g-C 3 N 4 The invention relates to a method for synthesizing a high-load sulfur lithium-sulfur battery cathode material as a template agent, and also relates to the application of the lithium-sulfur battery cathode material in preparing a lithium-sulfur battery with excellent electrochemical performance, and belongs to the technical field of lithium-sulfur batteries. Background technique [0002] The active material of the positive electrode material of the lithium-sulfur battery is sulfur, and the negative electrode is metallic lithium. The theoretical specific capacity of elemental sulfur as a cathode material for lithium-sulfur batteries is as high as 1675mA h g -1 , the theoretical energy density is 2600Wkg -1 At the same time, the price of elemental sulfur is low, safe and non-toxic, 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): H01M4/36H01M10/0525
CPCH01M4/366H01M10/0525Y02E60/10
Inventor 李亚娟张梦源张枝枫游小龙马路金高尧刘又年
Owner CENT SOUTH UNIV
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