Explosion-proof lithium-ion battery electrolyte

A lithium-ion battery and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as battery explosion, and achieve the effects of suppressing combustion, improving electrochemical performance, and excellent safety and explosion-proof performance.

Inactive Publication Date: 2016-11-09
WUHU KAIER ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, for lithium-ion batteries, the danger of battery explosion often occurs, so the safety performance of the electrolyte is very important, so it is very necessary to solve the above problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The present embodiment provides a kind of explosion-proof lithium-ion battery electrolyte, comprises LiPF Electrolyte, comprises following solvent and adds additive:

[0011] Trifluoropropylene carbonate and chloroethylene carbonate and ethylene carbonate and propylene carbonate mixed solution, ethyl methanesulfonate additive, trimethyl phosphite additive, phosphazene additive.

[0012] The weight of described propylene trifluorocarbonate and chloroethylene carbonate is 32% of solvent plus additive weight. The weight of described ethylene carbonate and propylene carbonate is solvent plus 40% of additive weight. The weight of the ethyl methanesulfonate additive is the solvent plus 10% of the weight of the additive. The weight of the trimethyl phosphite additive is the solvent plus 10% of the weight of the additive. The weight of the phosphazene additive is 8% of the weight of the solvent plus the additive.

Embodiment 2

[0014] The present embodiment provides a kind of explosion-proof lithium-ion battery electrolyte, comprises LiPF Electrolyte, comprises following solvent and adds additive:

[0015] Trifluoropropylene carbonate and chloroethylene carbonate and ethylene carbonate and propylene carbonate mixed solution, ethyl methanesulfonate additive, trimethyl phosphite additive, phosphazene additive.

[0016] The weight of described trifluoropropylene carbonate and chloroethylene carbonate is solvent plus 36% of additive weight. The weight of described ethylene carbonate and propylene carbonate is solvent adds 36% of additive weight. The weight of the ethyl methanesulfonate additive is the solvent plus 10% of the weight of the additive. The weight of the trimethyl phosphite additive is the solvent plus 10% of the weight of the additive. The weight of the phosphazene additive is 8% of the weight of the solvent plus the additive.

Embodiment 3

[0018] The present embodiment provides a kind of explosion-proof lithium-ion battery electrolyte, comprises LiPF Electrolyte, comprises following solvent and adds additive:

[0019] Trifluoropropylene carbonate and chloroethylene carbonate and ethylene carbonate and propylene carbonate mixed solution, ethyl methanesulfonate additive, trimethyl phosphite additive, phosphazene additive.

[0020] The weight of described trifluoropropylene carbonate and chloroethylene carbonate is solvent plus 36% of additive weight. The weight of described ethylene carbonate and propylene carbonate is solvent plus 40% of additive weight. The weight of the ethyl methanesulfonate additive is the solvent plus 10% of the weight of the additive. The weight of the trimethyl phosphite additive is the solvent plus 10% of the weight of the additive. The weight of the phosphazene additive is 4% of the weight of the solvent plus the additive.

[0021] Above embodiment adopts trifluoropropylene carbonate ...

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PUM

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Abstract

The invention is intended to provide an explosion-proof lithium-ion battery electrolyte, trifluoropropylene carbonate, chloroethylene carbonate and ethylene carbonate and propylene carbonate mixed solution are used, providing a high flash point, combustion of the electrolyte can be suppressed, ethylmethane sulfonate additive is used to provide good film-forming property and low temperature conductivity, trimethyl phosphite is used to provide improved flame retardancy for the electrolyte and improved electrochemical characteristics for cathode half-cell, phosphazene additive provides flame retardancy or non-flammability for the electrolyte, electrochemical properties of a battery itself are unaffected, and excellent safety explosion-proof property is provided.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to an explosion-proof lithium ion battery electrolyte. Background technique [0002] Electrolyte is one of the four key materials of lithium-ion batteries (positive electrode, negative electrode, diaphragm, and electrolyte). It is known as the "blood" of lithium-ion batteries. Guarantee of high voltage, high specific energy and other advantages. The electrolyte is generally prepared from high-purity organic solvents, electrolyte lithium salt (lithium hexafluorophosphate, LiFL6), necessary additives and other raw materials, under certain conditions and in a certain proportion. At present, for lithium-ion batteries, the danger of battery explosion often occurs, so the safety performance of the electrolyte is very important, so it is very necessary to solve the above problems. Contents of the invention [0003] In order to solve the above problems, the present invention provide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0569H01M10/0525
CPCH01M10/0525H01M10/0567H01M10/0569Y02E60/10
Inventor 秦传保汪桂云张承平宋永胜陆跃
Owner WUHU KAIER ELECTRICAL TECH
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