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

Lithium ion battery electrolyte and lithium ion battery

A lithium-ion battery, electrolyte technology, applied in the field of applied chemistry, can solve problems such as insufficient high pressure resistance

Active Publication Date: 2017-04-05
BYD CO LTD
View PDF4 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of insufficient high-voltage resistance of lithium-ion batteries prepared by the existing lithium-ion battery electrolyte, and provide a method for improving the high-voltage resistance of lithium-ion 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 ion battery electrolyte and lithium ion battery
  • Lithium ion battery electrolyte and lithium ion battery
  • Lithium ion battery electrolyte and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0024] Among them, according to a particularly preferred embodiment of the present invention, the high-pressure additives include: 4-cyanophenoxy, bis(methoxy)phosphate, bis(4-cyanophenoxy), methoxy Phosphate, 4-cyanophenoxy, cyanomethoxy, methoxy phosphate, 3,5-dicyanophenoxy, methoxy, trifluoroethoxy phosphate, 4-cyano Phenoxy, Methoxy, Trifluoroethoxy Phosphate, Bis(4-cyanophenoxy), Trifluoroethoxy Phosphate, Bis(3,5-Dicyanophenoxy), Tris Fluoroethoxy phosphate, 4-cyanophenoxy, bis(methoxy) phosphite, bis(4-cyanophenoxy), methoxy phosphite, 4-cyanophenoxy , cyanomethoxy, methoxy phosphite, 3,5-dicyanophenoxy, methoxy, trifluoroethoxy phosphite, 4-cyanophenoxy, methoxy, Trifluoroethoxyphosphite, bis(4-cyanophenoxy), trifluoroethoxyphosphite, and bis(3,5-dicyanophenoxy), trifluoroethoxyphosphite at least one of phosphate esters. More preferably, the high pressure additives include 3,5-dicyanophenoxy, methoxy, trifluoroethoxy phosphite, 4-cyanophenoxy, methoxy, trifluoroeth...

Embodiment 1

[0039] The electrolyte solution is configured in the glove box, which is filled with nitrogen with a purity of 99.999%, the water and oxygen content in the glove box is controlled at 6 A 1mol / L electrolyte solution is formed. Then add 1 gram of high-pressure additive (3,5-dicyanophenoxy, methoxy, trifluoroethoxy phosphite, as shown in the following formula) and 1 gram of 1,3-propanesulfonate to the above electrolyte solution Lactone, mixed uniformly to obtain the high-pressure non-aqueous electrolyte solution of the present embodiment.

[0040]

[0041] Wherein, the synthetic method of 3,5-dicyanophenoxy group, methoxyl group, trifluoroethoxy phosphite comprises: in a 1000ml three-necked flask, feed nitrogen to displace air, add 3,5- Dicyanophenol (432g, 3mol), phosphorus trichloride (137g, 1mol) was added dropwise and stirred, heated to reflux for 5-6h after the dropwise addition was completed, then decompressed distillation to remove HCl gas, column purification to obtain...

Embodiment 2

[0044] Prepare high-voltage non-aqueous electrolyte and lithium-ion battery according to the method of Example 1, the difference is that the high-voltage additive is 4-cyanophenoxy, methoxy, trifluoroethoxy phosphite, as shown in the following formula.

[0045]

[0046] Wherein, the synthetic method of 4-cyanophenoxy group, methoxyl group, trifluoroethoxy phosphite comprises: in a 1000ml there-necked flask, feed nitrogen to displace air, add 4-cyanophenol (357g, 3mol), phosphorus trichloride (137g, 1mol) was added dropwise and stirred, and after the dropwise addition was completed, it was heated to reflux for 5-6h, then the HCl gas was removed by distillation under reduced pressure, and the column was purified to obtain three (4-cyanophenoxy) Phosphite (335 g, 0.87 mol). Then three (4-cyanophenoxy) phosphite (335g, 0.87mol), add methanol (28g, 0.87mol) and trifluoroethanol (87g, 0.87mol), and stir reflux reaction 5-6h, then The 4-cyanophenol was removed by distillation und...

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 provides a lithium ion battery electrolyte. The lithium ion battery electrolyte is a liquid containing a lithium salt and an organic solvent, the electrolyte also contains a high pressure additive, the high pressure additive comprises a phosphotriester organic matter and / or a phosphite triester organic matter, and the molecular structures of the phosphotriester organic matter and / or the phosphite triester organic matter respectively have at least one cyanophenyl group. The invention also provides a lithium ion battery. The lithium ion battery comprises a shell, a battery cell positioned in the shell, and the lithium ion battery electrolyte. The high pressure resistance of the lithium ion battery is substantially improved.

Description

technical field [0001] The invention relates to the field of applied chemistry, in particular to a lithium-ion battery electrolyte and a lithium-ion battery comprising the lithium-ion battery electrolyte. Background technique [0002] Lithium-ion battery electrolyte plays the role of conducting electrons between the positive and negative electrodes of the lithium-ion battery. It is generally prepared from high-purity organic solvents, electrolyte lithium salts, additives and other raw materials in a certain proportion under certain conditions. [0003] Improving the safety and energy density of lithium-ion batteries is an important innovation direction to increase the practical application value of lithium-ion batteries. Improving the working voltage of the battery is one of the effective ways to increase the energy density of lithium-ion batteries. High-voltage lithium batteries have not been applied to actual production so far. The biggest reason is that the electrochemica...

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): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567Y02E60/10
Inventor 任建新王圣
Owner BYD CO LTD
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