Lithium bis(fluorosufonyl)imide/1, 3-dioxolane lithium battery gel electrolyte, preparation method thereof and battery

A technology of lithium bisfluorosulfonimide and gel electrolyte, which is applied in the directions of lithium storage battery, secondary battery, electrolyte immobilization/gelation, etc., to achieve the effect of simple preparation process and low cost

Inactive Publication Date: 2019-03-19
ZHEJIANG UNIV
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems existing in the existing lithium metal battery, and provide a novel bisfluorosulfonimide lithium / 1,3-dioxopentacycline gel electrolyte

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 bis(fluorosufonyl)imide/1, 3-dioxolane lithium battery gel electrolyte, preparation method thereof and battery
  • Lithium bis(fluorosufonyl)imide/1, 3-dioxolane lithium battery gel electrolyte, preparation method thereof and battery
  • Lithium bis(fluorosufonyl)imide/1, 3-dioxolane lithium battery gel electrolyte, preparation method thereof and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] With lithium bisfluorosulfonyl imide as the solute and 1,3-dioxane as the solvent, configure 3.5molL in a glove box protected by an argon atmosphere (water content-1 Lithium bisfluorosulfonyl imide / 1,3-dioxane electrolyte, and the Celgard 2400 diaphragm was immersed in the electrolyte, and after 24 hours at room temperature, a gel electrolyte was formed. Then assemble lithium / copper and lithium / lithium button batteries (CR2025) to test the cycle efficiency and cycle stability of the lithium metal anode material, the diameter of the lithium sheet is 12mm, and the diameter of the copper sheet is 18mm.

[0031] Figure 4 Cycle efficiency of lithium / copper button cells prepared for this example. figure 1 .a The current density is 2mAcm -2 , figure 1 .b and figure 1 .c The current density is 5mAcm -2 , the charging cut-off voltage is 1V vs. Li / Li + . from figure 1 It can be seen that no matter the current density is 2mAcm -2 Still 5mAcm -2 , and the cycle efficiency...

Embodiment 2

[0033] With lithium bisfluorosulfonimide as the solute and 1,3-dioxane as the solvent, configure 3.0molL in a glove box protected by an argon atmosphere (water content-1Lithium bisfluorosulfonyl imide / 1,3-dioxane electrolyte, and the Celgard 2400 diaphragm was immersed in the electrolyte, and after 24 hours at room temperature, a gel electrolyte was formed. Then assemble lithium / copper and lithium / lithium button batteries (CR2025) to test the cycle efficiency and cycle stability of the lithium metal anode material, the diameter of the lithium sheet is 12mm, and the diameter of the copper sheet is 18mm. After testing, the gel electrolyte prepared in this example is also similar to Example 1, and has high cycle efficiency and cycle stability.

Embodiment 3

[0035] With lithium bisfluorosulfonyl imide as the solute and 1,3-dioxane as the solvent, configure 4.0molL in a glove box protected by an argon atmosphere (water content-1 Lithium bisfluorosulfonyl imide / 1,3-dioxane electrolyte, and the Celgard 2400 diaphragm was immersed in the electrolyte, and after 24 hours at room temperature, a gel electrolyte was formed. Then assemble lithium / copper and lithium / lithium button batteries (CR2025) to test the cycle efficiency and cycle stability of the lithium metal anode material, the diameter of the lithium sheet is 12mm, and the diameter of the copper sheet is 18mm. After testing, the gel electrolyte prepared in this example is also similar to Example 1, and has high cycle efficiency and cycle stability.

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
diameteraaaaaaaaaa
Login to view more

Abstract

The invention provides a lithium bis(fluorosufonyl)imide/1, 3-dioxolane lithium battery gel electrolyte, a preparation method thereof and a battery and belongs to the technical field of lithium batteries. The preparation method comprises taking lithium bis(fluorosufonyl)imide and 1, 3-dioxolane as precursors to dissolve and uniformly mix the lithium bis(fluorosufonyl)imide inside the 1, 3-dioxolane, and ensuring the concentration of the lithium bis(fluorosulfonyl)imide in the mixed solution is 3-4 molL<-1>; standing the mixed solution in a sealed state so that the 1, 3-dioxolane can be gradually polymerized under the catalytic effects of the lithium bis(fluorosulfonyl)imide to form the lithium bis(fluorosufonyl)imide/1, 3-dioxolane lithium battery gel electrolyte. The lithium bis(fluorosufonyl)imide/1, 3-dioxolane lithium battery gel electrolyte has the advantages of being wide in electrochemical window, stable in effects on lithium negative electrodes, good in lithium dendrite growthinhibiting effects and the like, and can greatly improve the circulating efficiency of the lithium negative electrodes. Meanwhile, the lithium bis(fluorosufonyl)imide/1, 3-dioxolane lithium battery gel electrolyte is simple in preparation, low in price of raw materials and energy and applicable to large-scale industrialized production as well as to lithium batteries with various positive electrodematerials such as lithium-sulfur batteries, lithium-lithium ion phosphate batteries, lithium-lithium cobalt oxide batteries and lithium-air batteries.

Description

technical field [0001] The invention relates to the technical field of electrolyte materials for lithium batteries, in particular to a lithium bisfluorosulfonimide / 1,3-dioxane lithium battery gel electrolyte, a preparation method thereof, and a battery. Background technique [0002] Lithium metal due to its high theoretical capacity (3860mAh g -1 ), low electronegativity (-3.04V vs. SHE), low theoretical density (0.534g cm -3 ), and the advantages of pure lithium source, it is a very ideal lithium battery anode material. In fact, the next generation of high-energy-density lithium-sulfur batteries, all-solid-state lithium batteries, and lithium-air batteries must use lithium metal as the negative electrode material. The use of lithium metal negative electrodes is almost the best choice for improving the energy density of lithium batteries. . However, the lithium metal negative electrode has two major disadvantages. First, lithium metal is extremely active. Existing studies...

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): H01M10/0565H01M10/052
CPCH01M10/052H01M10/0565H01M2300/0085Y02E60/10
Inventor 王淼张鹏朱佳佳徐鹏李振华
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap