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A kind of lithium-ion battery flame retardant electrolyte

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: 2020-08-18
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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  • A kind of lithium-ion battery flame retardant electrolyte
  • A kind of lithium-ion battery flame retardant electrolyte
  • A kind of lithium-ion battery flame retardant electrolyte

Examples

Experimental program
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Effect test

Embodiment 1

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

[0037] In a nitrogen-protected glove box (moisture6 ) to a molar concentration of 1mol / L, then add 1% vinylene carbonate, 7% ethoxy pentafluorocyclotriphosphazene, 1% perfluorohexanone and 5% perfluoropentyl methyl ether, and stir to obtain the lithium-ion battery electrolyte of Example 1.

Embodiment 2

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

[0040] In a nitrogen-protected glove box (moisture6 ) to a molar concentration of 1mol / L, then add 1% vinylene carbonate, 7% ethoxy pentafluorocyclotriphosphazene, 1% perfluorohexanone and 3% perfluorohexyl methyl ether, and stir to obtain the lithium-ion battery electrolyte of embodiment 2.

Embodiment 3

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

[0043] In a nitrogen-protected glove box (moisture6 ) to a molar concentration of 1mol / L, then add 1% vinylene carbonate, 7% ethoxy pentafluorocyclotriphosphazene, 1% perfluorohexanone and 6% The perfluorohexyl methyl ether, stir to obtain the lithium-ion battery electrolyte of embodiment 3 after.

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Abstract

In order to solve the problem that it is difficult to take into account electrochemical properties such as a flame-retardant property and circulation of the electrolyte in the prior art, a lithium ion battery electrolyte having a flame-retardant function and improving a circulation property is provided. The electrolyte comprises a non-aqueous organic solvent, a lithium salt, and additives; the additives comprise a phosphazene compound, perfluorohexanone, and perfluoroalkyl ether compound. The lithium ion battery electrolyte is used, so that the lithium ion battery has superior normal temperature and high temperature circulation performances, there is no inflation under high temperature storage conditions, an internal resistance changes slightly, and the purposes of taking a flame-retardant effect into account and improving circulation can be achieved.

Description

technical field [0001] The invention relates to a lithium battery electrolyte containing various flame retardant additives for lithium ion batteries, which can effectively improve the safety performance and cycle performance of the battery. Background technique [0002] Lithium battery electrolyte belongs to the new energy device - the key material of lithium ion battery, which is equivalent to the "blood" of the battery and plays a key role in the performance of lithium battery. Flame-retardant electrolyte is an improved high-tech product of lithium-ion battery electrolyte, which is of great 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 is becoming more and more mature, concerns about the safety of lithium-ion battery packs still exist. Due to the high energy density of lithium batteries, the internal electrolyte / negative electrode is ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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