NON-AQUEOUS ELECTROLYTE FOR LITHIUM-ION BATTERY AND LITHIUM-ION BATTERY

Title:

NON-AQUEOUS ELECTROLYTE FOR LITHIUM-ION BATTERY AND LITHIUM-ION BATTERY

Document Type and Number:

WIPO Patent Application WO/2019/024408

Kind Code:

A1

Abstract:

To solve the problems in an existing electrolyte for a lithium-ion battery of insufficient high-temperature gas storage and high-temperature cycle performance of the battery, the present invention provides a non-aqueous electrolyte for a lithium-ion battery. The non-aqueous electrolyte for the lithium-ion battery comprises a compound as shown in structural formula I, wherein R1, R2, R3, and R4 in the formula I are independently selected from a hydrogen atom, a fluorine atom, a cyano group, a C1-5 alkyl group or halogenated alkyl group, C1-5 oxygen-containing alkyl group, and C1-5 silicon-containing alkyl group; X is a -O-R5-CN group; R5 is a C1-5 alkyl group or halogenated alkyl group; m, n, z, and y are integers of 0 or 1; and m+n+y+z≠0. When the non-aqueous electrolyte is applied to the lithium-ion battery, decomposition of the electrolyte on the surface of an electrode can be inhibited, and the high-temperature storage performance of the battery can be improved; moreover, the gas production is less, and the expansion rate of the battery is low, thereby effectively improving the high-temperature cycle performance and the high-temperature gas storage performance of the lithium-ion battery.

Inventors:

ZHENG ZHONGTIAN (CN)
ZHONG LING (CN)
HU SHIGUANG (CN)
SHI QIAO (CN)
CHEN CHANGCHUN (CN)
DENG ZHAOHUI (CN)

Application Number:

PCT/CN2017/119264

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

Foreign References:

CN102522590A	2012-06-27
CN104956536A	2015-09-30
CN103069637A	2013-04-24
JP2009086582A	2009-04-23
JP2000123867A	2000-04-28

Other References: