LITHIUM ION BATTERY NON-AQUEOUS ELECTROLYTE AND LITHIUM ION BATTERY

Title:

LITHIUM ION BATTERY NON-AQUEOUS ELECTROLYTE AND LITHIUM ION BATTERY

Document Type and Number:

WIPO Patent Application WO/2019/024412

Kind Code:

A1

Abstract:

The present invention provides a lithium ion battery non-aqueous electrolyte to solve the problem of weak high-temperature circulation performance of the existing lithium ion battery electrolyte. The non-aqueous electrolyte comprises a compound A with the structural formula as shown in formula (I) and a compound B shown in formula (II); in formula (I), R1 is selected from alkylene having 1-5 carbon atoms or fluoro-substituted alkylene having 1-5 carbon atoms; R2 is selected from alkylene having 1-5 carbon atoms, and any one of fluoro-substituted alkylene or carbonyl having 1-5 carbon atoms; in formula (II), R3, R4, R5, R6, R7, and R8 are separately and independently selected from hydrogen and fluorine atoms, or groups containing 1-5 carbon atoms. The compound A and the compound B of the non-aqueous electrolyte can form a passivation film by means of reduction, decomposition, and composition on the surface of a negative electrode material of the lithium ion battery, and the heat stability of the passivation film is improved, so that the high-temperature circulation and storage performances of the battery are improved.

Inventors:

SHI QIAO (CN)
HU SHIGUANG (CN)
DENG ZHAOHUI (CN)
ZHANG HAO (CN)
LIU CHUNHUA (CN)

Application Number:

PCT/CN2017/119377

Publication Date:

February 07, 2019

Filing Date:

December 28, 2017

Export Citation:

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Assignee:

SHENZHEN CAPCHEM TECHNOLOGY CO LTD (CN)

International Classes:

H01M10/0567

Domestic Patent References:

WO2013108891A1

2013-07-25

Foreign References:

CN106328996A	2017-01-11
JP2015092476A	2015-05-14
CN104766995A	2015-07-08
CN106848404A	2017-06-13
CN03132755A	2003-08-29

Other References: