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Flame retardant electrolyte for lithium ion battery

A lithium-ion battery and electrolyte technology, which is applied in secondary batteries, secondary battery repair/maintenance, circuits, etc., can solve the problems such as the inability of the electrolyte to flame retardant cycle performance and insufficient

Active Publication Date: 2018-11-30
NANTONG CAPCHEM ELECTRONICS MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an improved electrolyte solution for lithium-ion batteries in view of the problems that the electrolyte solution in the prior art cannot be flame-retardant and has insufficient cycle performance.

Method used

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  • Flame retardant electrolyte for lithium ion battery
  • Flame retardant electrolyte for lithium ion battery
  • Flame retardant electrolyte for lithium ion battery

Examples

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Embodiment 1

[0036] This embodiment is used to illustrate the lithium ion battery electrolyte disclosed in the present invention.

[0037] In a glove box protected by nitrogen (moisture 6 ) To a molar concentration of 1 mol / L, and then add 1% vinylene carbonate, 7% ethoxy pentafluorocyclotriphosphazene, 1% perfluorohexanone and 5% based on the total mass of the electrolyte After stirring the perfluoropentyl methyl ether, the electrolyte of Example 1 was obtained.

Embodiment 2

[0039] This embodiment is used to illustrate the lithium ion battery electrolyte disclosed in the present invention.

[0040] In a glove box protected by nitrogen (moisture 6 ) To a molar concentration of 1mol / L, and then add 1% vinylene carbonate, 7% ethoxy pentafluorocyclotriphosphazene, 1% perfluorohexanone and 3% based on the total mass of the electrolyte After stirring the perfluorohexyl methyl ether, the electrolyte of Example 2 was obtained.

Embodiment 3

[0042] This embodiment is used to illustrate the lithium ion battery electrolyte disclosed in the present invention.

[0043] In a glove box protected by nitrogen (moisture 6 ) To a molar concentration of 1 mol / L, and then add 1% vinylene carbonate, 7% ethoxy pentafluorocyclotriphosphazene, 1% perfluorohexanone and 6% based on the total mass of the electrolyte After stirring the perfluorohexyl methyl ether, the electrolyte of Example 3 was obtained.

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Abstract

In order to solve the problem that electrolyte in the prior art difficultly takes into account the electrochemical properties of flame retardant properties, circulation and the like, the invention relates to electrolyte with flame retardant functions and capability of improving cyclic properties for a lithium ion battery. The electrolyte is prepared from a non-aqueous organic solvent, lithium saltand an additive; the additive is prepared from a phosphonitrile compound, perfluorinated hexanone and a perfluoroalkyl ether compound. By using the electrolyte for the lithium ion battery, disclosedby the invention, the lithium ion battery has the advantages of superior normal temperature and high temperature cycle performance, no inflation under high temperature storage conditions, small internal resistance change and capability of realizing the aims of improving the circulation and taking the flame retardant effect into account.

Description

Technical field [0001] The invention relates to a lithium battery electrolyte for lithium ion batteries containing multiple flame retardant additives, which can effectively improve the safety performance and cycle performance of the battery. Background technique [0002] Lithium battery electrolyte is a key material for new energy devices—lithium-ion batteries, which is equivalent to the "blood" of the battery and plays a key role in the performance of lithium batteries. Flame-retardant electrolyte is an improved high-tech product of lithium-ion battery electrolyte, which has a significant help to the safety of lithium-ion batteries and is conducive to improving the safety of electric vehicles. At present, as the application of lithium-ion batteries in electric vehicles has become increasingly mature, concerns about the safety of lithium battery packs still exist. Due to the high energy density of lithium batteries, the internal electrolyte / negative electrodes are extremely flam...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0525H01M10/42
CPCH01M10/0525H01M10/0567H01M10/4235Y02E60/10
Inventor 丁祥欢江卫健殷俊张丽兰郝敬磊
Owner NANTONG CAPCHEM ELECTRONICS MATERIALS CO LTD
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