Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of 3,5-diphosphazene p-phenylene ether additive and lithium-ion battery electrolyte containing the additive

A technology of nitrile-p-phenylene ether and p-phenylene ether, which is applied in secondary batteries, secondary battery repair/maintenance, phosphorus organic compounds, etc., and can solve problems such as high addition amount and performance damage of lithium-ion batteries

Active Publication Date: 2021-04-09
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still very few types of high-efficiency flame-retardant and overcharge protection additives that have been reported at the same time, and most of the flame-retardant overcharge protection additives are added in high amounts and will cause irreversible performance damage to lithium-ion batteries. Therefore, research on more efficient flame-retardant A new type of flame retardant overcharge protection additive that has little effect on electrochemical performance is of great significance for improving the safety 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
  • A kind of 3,5-diphosphazene p-phenylene ether additive and lithium-ion battery electrolyte containing the additive
  • A kind of 3,5-diphosphazene p-phenylene ether additive and lithium-ion battery electrolyte containing the additive
  • A kind of 3,5-diphosphazene p-phenylene ether additive and lithium-ion battery electrolyte containing the additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The preparation method of the electrolyte solution 1 and the experimental battery 1 specifically includes the following steps:

[0015] (1), the preparation of positive plate:

[0016] Mix the positive electrode active material silicon-based negative electrode material (NMC811), the conductive agent acetylene black, and the binder polytetrafluoroethylene according to the following mass ratio NMC811: acetylene black: polytetrafluoroethylene = 95:2.5:2.5, after the mixing is completed Add N-methylpyrrolidone, stir and mix thoroughly to form a uniform positive electrode slurry and evenly coat it on a 15-micron thick aluminum foil, and obtain a positive electrode sheet after drying;

[0017] (2), the preparation of electrolyte solution 1:

[0018] In an argon glove box with moisture content ≤ 10ppm, mix ethylene carbonate (EC) and ethyl methyl carbonate (EMC) according to the mass ratio EC:EMC=3:7 to obtain an organic solvent, and then slowly Add lithium hexafluorophospha...

Embodiment 2

[0022] Electrolyte 2 and experimental battery 2 were prepared in the same manner as in Example 1, except that 3,5-tris(trifluoromethoxy)phosphazene terephthalate was added after lithium hexafluorophosphate was completely dissolved during the preparation of the electrolyte. Methyl ether and film-forming additive vinylene carbonate, wherein the mass part ratio of lithium hexafluorophosphate, organic solvent, 3,5-tris(trifluoromethoxy)phosphazene-terephthalenyl ether and vinylene carbonate is 14 :75:10:1.

Embodiment 3

[0024] Electrolyte 3 and experimental battery 3 were prepared in the same manner as in Example 1, except that 3,5-tris(perfluoro-tert-butoxy)phosphazene p-phenylene was added after lithium hexafluorophosphate was completely dissolved during the preparation of the electrolyte. Diethoxymethyl ether and film-forming additive ethylene sulfate, wherein, lithium hexafluorophosphate, organic solvent, 3,5-tris(perfluoro-tert-butoxy)phosphazene p-phenylene diethoxymethyl ether and The mass part ratio of ethylene sulfate is 14:75:10:1.

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 discloses a 3,5-diphosphazene-p-phenylene ether additive and a lithium-ion battery electrolyte containing the additive. The lithium-ion battery electrolyte is composed of lithium salt, an organic solvent, 3,5-diphosphazene Composed of p-phenylene ether additives and film-forming additives. The 3,5-diphosphazene p-phenylene ether additive in the present invention not only has a high-efficiency flame retardant effect, but also can effectively protect the overcharge through the reversible redox reaction of the hydrogen atom on the benzene ring, thus reducing the The amount of conventional safety additives has little influence on the electrochemical performance of lithium-ion batteries at the same time, achieving both the safety performance and electrochemical performance of lithium-ion battery electrolytes.

Description

technical field [0001] The invention relates to the field of lithium-ion battery electrolytes, in particular to a 3,5-diphosphazene-p-phenylene ether additive and a lithium-ion battery electrolyte containing the additive. Background technique [0002] Lithium-ion batteries have significant advantages such as high energy density, low self-discharge rate, wide operating temperature range, long cycle life, and no memory effect. They are widely used in 3C digital, new energy vehicles, energy storage power stations, aerospace and other fields. Electrolyte is an essential and important part of lithium-ion batteries, which has an important impact on its capacity, internal resistance, cycle, rate, safety and other properties. However, the current commercial electrolytes contain a large amount of carbonate organic solvents Although it can guarantee the high ionic conductivity and electrochemical stability required for the normal operation of lithium-ion batteries, it usually has disa...

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): C07F9/06H01M10/0525H01M10/0567H01M10/42
CPCC07F9/065H01M10/0525H01M10/0567H01M10/4235Y02E60/10
Inventor 梁大宇
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY