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

Low-temperature electrolyte and lithium battery using same

An electrolyte and lithium battery technology, applied in the field of lithium-ion batteries, to achieve high ion conductivity, good compatibility, excellent low-temperature discharge and cycle performance

Active Publication Date: 2019-07-26
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low-temperature electrolyte and a lithium battery using the electrolyte, so as to facilitate the rapid intercalation and extraction of lithium ions under low temperature conditions, solve the problem of lithium deposition at the negative electrode due to too low temperature, and enable the lithium battery to Exhibits better low-temperature discharge and cycle performance in ultra-low temperature environments

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
  • Low-temperature electrolyte and lithium battery using same
  • Low-temperature electrolyte and lithium battery using same
  • Low-temperature electrolyte and lithium battery using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Electrolyte preparation: In a glove box (moisture <0.1ppm, oxygen <0.1ppm) filled with argon, take dimethyl carbonate, ethylene carbonate, ethyl methyl carbonate, propylene carbonate, which account for 85% of the total mass of the electrolyte Ethyl acetate organic mixed solution, the mass ratio of dimethyl carbonate, ethylene carbonate, ethyl methyl carbonate, and ethyl propionate is 1:3:3:3; then add an additive accounting for 1% of the total mass of the electrolyte to the mixed solution Vinylene carbonate and fluoroethylene carbonate, the mass ratio of vinylene carbonate to fluoroethylene carbonate is 1:1, and finally slowly add 14% of the total mass of the electrolyte to the mixed solution. Lithium phosphate (a), after being stirred evenly, the lithium-ion battery electrolyte of Example 1 of the present invention was obtained.

[0024]

[0025] Use the electrolytic solution of this embodiment to prepare lithium ion battery:

[0026] Preparation of positive electr...

Embodiment 2

[0030] Electrolyte preparation: In a glove box (moisture <0.1ppm, oxygen <0.1ppm) filled with argon, take dimethyl carbonate, ethylene carbonate, ethyl methyl carbonate, propylene carbonate, which account for 85% of the total mass of the electrolyte Ethyl acetate organic mixed solution, the mass ratio of dimethyl carbonate, ethylene carbonate, ethyl methyl carbonate, and ethyl propionate is 1:3:3:3; then add an additive accounting for 1% of the total mass of the electrolyte to the mixed solution Vinylene carbonate and fluoroethylene carbonate, the mass ratio of vinylene carbonate to fluoroethylene carbonate is 1:1, and finally slowly add 14% of the total mass of the electrolyte to the mixed solution. Lithium phosphate (b), after being stirred evenly, the lithium-ion battery electrolyte of Example 2 of the present invention was obtained.

[0031]

[0032] The electrolyte solution of this example is used to prepare a lithium ion battery, and the preparation method is the same...

Embodiment 3

[0034] Electrolyte preparation: In a glove box filled with argon (moisture <0.1ppm, oxygen <0.1ppm), take dimethyl carbonate, ethylene carbonate, methyl ethyl carbonate, propionic acid, which account for 85% of the total mass of the electrolyte Ethyl organic mixed solution, the mass ratio of dimethyl carbonate, ethylene carbonate, ethyl methyl carbonate and ethyl propionate is 1:3:3:3; then add 1% of the total mass of electrolyte carbonic acid to the mixed solution Vinylene ester and fluoroethylene carbonate, the mass ratio of vinylene carbonate to fluoroethylene carbonate is 1:1, and finally, slowly add alkyl sulfur-containing oxygen-containing fluorophosphoric acid to the mixed solution, accounting for 14% of the total mass of the electrolyte Lithium (c), after stirring evenly, the lithium-ion battery electrolyte of Example 3 of the present invention was obtained.

[0035]

[0036] The electrolyte solution of this example is used to prepare a lithium ion battery, and 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
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a low-temperature electrolyte and a lithium battery using the same, and relates to the technical field of lithium ion batteries. The low-temperature electrolyte comprises lithium salt, an organic solvent and an additive, wherein the lithium salt is alkyl sulfur-containing oxygen-containing fluoro lithium phosphate; compared with a traditional lithium salt, the electrolyte of the invention adopts alkyl sulfur-containing oxygen-containing fluoro lithium phosphate, so that a relatively high ionic conductivity is still achieved under the ultralow temperature condition of minus 50 DEG C; in addition, the alkyl sulfur-containing oxygen-containing fluoro lithium phosphate can form a low-impedance stable SEI membrane on the surface of the negative electrodes, so that the rapid intercalation and de-intercalation of the lithium ions under the low-temperature condition are facilitated, and the problem of lithium ion evolution caused by too low temperature is effectively solved, and more excellent low-temperature discharge and cycling performance in an ultralow-temperature environment can be shown.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a low-temperature electrolyte and a lithium battery using the electrolyte. Background technique [0002] Due to its high operating voltage, high specific energy density, long cycle life, and environmental friendliness, lithium-ion batteries have become one of the indispensable and important chemical energy sources in the fields of electronic digital, electric vehicles, energy storage applications, aerospace and other fields. Electrolyte is an important part of lithium-ion batteries. It is called the "blood" of lithium-ion batteries. It is usually composed of lithium salts, solvents and additives. It has an important impact on the cycle performance, rate performance and safety performance of lithium-ion batteries. . Since the electrolyte should meet the requirements of compatibility with positive and negative materials, physical and chemical stability, high electric...

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): H01M10/0568H01M10/058H01M10/0525
CPCH01M10/0525H01M10/0568H01M10/058Y02E60/10Y02P70/50
Inventor 张健高田慧梁大宇崔伟丁楚雄
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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