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

A lithium-sulfur battery electrolyte with improved battery capacity and preparation method thereof

A lithium-sulfur battery and battery capacity technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of lithium-sulfur battery capacity not playing a substantial role, poor long-term cycle of lithium-sulfur batteries, etc., to improve long-term cycle Performance, good commercialization prospects, simple preparation effect

Active Publication Date: 2019-03-05
苏州德加能源科技有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, despite accounting for 90% of the total electrolyte mass, the organic solvent of the traditional lithium-sulfur electrolyte only maintains lithium ion transport, and does not play a substantial role in further improving the capacity of lithium-sulfur batteries.
At the same time, in the cycle process of lithium-sulfur batteries with traditional electrolytes, soluble polysulfides "shuttle" between the positive and negative electrodes, so the basic problem of poor long-term cycle of lithium-sulfur batteries cannot be well solved.

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 lithium-sulfur battery electrolyte with improved battery capacity and preparation method thereof
  • A lithium-sulfur battery electrolyte with improved battery capacity and preparation method thereof
  • A lithium-sulfur battery electrolyte with improved battery capacity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a lithium-sulfur battery electrolyte and its configuration method for improving battery capacity, specifically:

[0028] (a) Under argon protection, measure 0.9 mL of 1,3-dioxolane (DOL, the first solvent) and 0.9 mL of ethylene glycol dimethyl ether (DME, the second solvent) in the glove box ) and mix, then add 0.2 mL of dimethyl trisulfide (DMTS, the third solvent), and mix well;

[0029] (b) Add 22.3 mg of anhydrous lithium nitrate additive (LiNO 3 ) and 558mg of lithium bistrifluoromethanesulfonylimide (LiTFSI); after fully mixing uniformly, the lithium-sulfur electrolyte is obtained; in the electrolyte, the concentration of LiTFSI is 1.0M, and LiNO 3 The mass percentage of DMTS is 1wt%, and the volume ratio of DMTS in the mixed solvent (also about the volume ratio of the total electrolyte) is 10vol%.

Embodiment 2

[0031] This embodiment provides a lithium-sulfur battery electrolyte and its configuration method for improving battery capacity, specifically:

[0032] (a) Under argon protection, measure and mix 0.8 mL of 1,3-dioxolane (DOL) and 0.8 mL of ethylene glycol dimethyl ether (DME) in a glove box, and then add 0.4 mL dimethyl trisulfide (DMTS), mix well;

[0033] (b) Add 22.3 mg of anhydrous lithium nitrate additive (LiNO 3 ) and 558 mg of lithium bistrifluoromethanesulfonylimide (LiTFSI); after mixing well, the lithium-sulfur electrolyte is obtained; in the electrolyte, the concentration of LiTFSI is 1.0 M, LiNO 3 The mass percentage of DMTS is 1 wt%, and the volume ratio of DMTS in the mixed solvent (also about the volume ratio of the total electrolyte) is 20 vol%.

Embodiment 3

[0035] This embodiment provides a lithium-sulfur battery electrolyte and its configuration method for improving battery capacity, specifically:

[0036] (a) Under argon protection, measure and mix 0.7 mL of 1,3-dioxolane (DOL) and 0.7 mL of ethylene glycol dimethyl ether (DME) in a glove box, and then add 0.6 mL dimethyl trisulfide (DMTS), mix well;

[0037] (b) After mixing well, add 22.3 mg of anhydrous lithium nitrate additive (LiNO 3) and 558 mg of lithium bistrifluoromethanesulfonylimide (LiTFSI); after mixing well, the lithium-sulfur electrolyte solution is obtained. In the electrolyte, the concentration of LiTFSI is 1.0 M, LiNO 3 The mass percentage of DMTS is 1 wt%, and the volume ratio of DMTS in the total electrolyte (also about the volume ratio in the total electrolyte) is 30 vol%.

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-sulfur battery electrolyte solution for improving battery capacity and a preparation method thereof. The electrolyte solution includes an organic solvent, a lithium salt and an additive, and is characterized in that the organic solvent includes a first solvent, a second solvent and a second solvent. Three solvents, the first solvent is one or more of 1,3-dioxolane, 1,4-dioxane and 1,1-dimethoxyethane, the second solvent One or more of ethylene glycol dimethyl ether and diglyme, the third solvent is one or more of dimethyl sulfide organic substances, the first solvent and the The volume ratio of the second solvent is 0.5-2:1, and the volume fraction of the third solvent in the organic solvent is 10-40%. Dimethyl ether organic matter is reduced to lithium methylsulfide, which can contribute capacity other than the positive active material. This unique working principle makes the lithium-sulfur battery prepared by it show the characteristics of reaching or even exceeding its theoretical capacity. .

Description

technical field [0001] The invention belongs to the field of battery electrolyte materials, and relates to a lithium-sulfur battery electrolyte, in particular to a lithium-sulfur battery electrolyte with improved battery capacity and a preparation method thereof. Background technique [0002] Since the third industrial revolution in the 1940s, the scientific and technological civilization of human society has made rapid progress. Especially since the rapid development of pure electric and hybrid vehicles in the 1990s, the demand for energy has continued to increase, followed by energy and environmental problems caused by excessive dependence on natural resources. Therefore, it is imminent to continuously improve lithium-sulfur battery technology, which has important practical significance for alleviating and even solving energy and environmental problems that endanger the world. [0003] A lithium-sulfur battery is a type of lithium battery in which elemental sulfur or sulf...

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): H01M10/0567H01M10/0569H01M10/36H01M10/38
CPCH01M10/0567H01M10/0569H01M10/36H01M10/38Y02E60/10Y02P70/50
Inventor 晏成林刘杰钱涛
Owner 苏州德加能源科技有限公司
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