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

Lithium sulfide battery

A battery, sulfur-lithium technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of irreversible loss of active materials, battery capacity attenuation, and poor cycle stability of lithium-sulfur batteries, and achieve enhanced conductivity and reduced Small attenuation, the effect of improving electrochemical performance

Active Publication Date: 2018-12-25
苏州市相城区渭塘城乡发展有限公司
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently developed lithium-sulfur batteries still have some defects. For example, during the charging and discharging process of lithium-sulfur batteries, there will be a shuttle effect, resulting in irreversible loss of active materials, resulting in attenuation of battery capacity; , the generated lithium polysulfide will be deposited on the negative electrode, causing lithium dendrites to form on the lithium negative electrode, resulting in poor cycle stability of the lithium-sulfur battery

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 sulfide battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Graphene oxide prepared by the Hummers method was dissolved in water to prepare a 10 mg / L graphene oxide aqueous solution, and silicon dioxide with a particle size of 200 nm was ultrasonically dispersed (50 kHz ultrasonic dispersion treatment for 1 h) into deionized water to obtain a 50 mg / L Silica dispersion, mix the graphene oxide aqueous solution and the silica dispersion according to the volume ratio of 1:5, 50kHz ultrasonic dispersion treatment for 2h to obtain the mixed solution A, and place the barrel containing the mixed solution A on a constant temperature magnetic stirrer , Stir the mixed liquid A at a constant temperature of 50°C, insert the feed pipe of the spray dryer (LPG-5) into the barrel, start the spray dryer, and adjust the air intake to 5m 3 / min, the inlet temperature is 200°C, the feed rate of the mixed solution A is 5mL / min, the needle passing rate is 1 time / 10s, and the material A (graphene-coated silica material) is obtained by spray drying. A i...

Embodiment 2

[0029] Graphene oxide prepared by the Hummers method was dissolved in water to prepare a 10mg / L graphene oxide aqueous solution, and silicon dioxide with a particle size of 200nm was ultrasonically dispersed (50kHz ultrasonic dispersion treatment for 1h) into absolute ethanol to obtain a 50mg / L Silica dispersion liquid, the graphene oxide aqueous solution and the silica dispersion liquid are mixed according to the volume ratio of 1:5, 50kHz ultrasonic dispersion treatment for 2h to obtain the mixed liquid A, and the barrel containing the mixed liquid A is placed in a constant temperature magnetic stirrer Stir the mixed solution A at a constant temperature of 50°C, insert the feed pipe of the spray dryer (LPG-5) into the barrel, start the spray dryer, and adjust the air intake to 5m 3 / min, the inlet temperature is 220°C, the feed rate of the mixed solution A is 5mL / min, the needle passing rate is 1 time / 10s, and the material A (graphene-coated silica material) is obtained by sp...

Embodiment 3

[0035]Graphene oxide prepared by the Hummers method was dissolved in water to prepare a 10mg / L graphene oxide aqueous solution, and silicon dioxide with a particle size of 200nm was ultrasonically dispersed (50kHz ultrasonic dispersion treatment for 1h) into ethylene glycol to obtain a 50mg / L Silica dispersion liquid, the graphene oxide aqueous solution and the silica dispersion liquid are mixed according to the volume ratio of 1:5, 50kHz ultrasonic dispersion treatment for 2h to obtain the mixed liquid A, and the barrel containing the mixed liquid A is placed in a constant temperature magnetic stirrer Stir the mixed solution A at a constant temperature of 50°C, insert the feed pipe of the spray dryer (LPG-5) into the barrel, start the spray dryer, and adjust the air intake to 5m 3 / min, the inlet temperature is 230°C, the feed rate of the mixed solution A is 5mL / min, the needle passing rate is 1 time / 10s, and the material A (graphene-coated silica material) is obtained by spra...

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

No PUM Login to View More

Abstract

The invention relates to a lithium sulfide battery, comprising a positive electrode sheet, a negative electrode sheet, a battery separator and an electrolyte. The positive electrode material, the conductive agent, the binder and the solvent are stirred and evenly mixed to obtain a mixed slurry, the mixed slurry uniformly coats the aluminum foil, and the positive electrode sheet is prepared after vacuum drying treatment; A metal lithium sheet is used as a negative electrode sheet, and a polypropylene porous membrane is used as a battery separator; The electrolyte comprises solvent A, solvent Band LiTFSI, wherein the concentration of LiTFSI in the electrolyte is 2-3 mol / L, and the molar ratio of LiTFSI to solvent A is 1: (1.5-2.5); Solvent A is a mixture of one or more of DMC, DEC, DOL, DME; Solvent B is hexafluoroisopropyl methyl ether. The technical scheme can effectively improve the cycle stability of the lithium sulfide battery and reduce the attenuation of the discharge capacity.

Description

technical field [0001] The invention relates to a sulfur-lithium battery. Background technique [0002] Lithium-sulfur batteries have attracted much attention in recent years due to their advantages of high theoretical energy density and low environmental pollution. However, the currently developed lithium-sulfur batteries still have some defects. For example, during the charging and discharging process of lithium-sulfur batteries, there will be a shuttle effect, resulting in irreversible loss of active materials, resulting in attenuation of battery capacity; , the generated lithium polysulfide will be deposited on the negative electrode, causing lithium dendrites to form on the lithium negative electrode, resulting in poor cycle stability of the lithium-sulfur battery. Contents of the invention [0003] The object of the present invention is to provide a sulfur-lithium battery and its positive electrode modified material, which can overcome the above-mentioned defects to...

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): H01M4/36H01M4/38H01M4/62H01M10/0525H01M10/0569
CPCH01M4/366H01M4/38H01M4/628H01M10/0525H01M10/0569H01M2300/0037Y02E60/10
Inventor 胡小玲其他发明人请求不公开姓名
Owner 苏州市相城区渭塘城乡发展有限公司
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