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1. (WO2018218714) NON-AQUEOUS ELECTROLYTE FOR LITHIUM ION BATTERY AND LITHIUM ION BATTERY

Pub. No.:    WO/2018/218714    International Application No.:    PCT/CN2017/089664
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Sat Jun 24 01:59:59 CEST 2017
IPC: H01M 10/0566
H01M 10/0569
Applicants: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.
深圳新宙邦科技股份有限公司
Inventors: DENG, Zhaohui
邓朝晖
HU, Shiguang
胡时光
LIN, Muchong
林木崇
SHI, Qiao
石桥
Title: NON-AQUEOUS ELECTROLYTE FOR LITHIUM ION BATTERY AND LITHIUM ION BATTERY
Abstract:
Disclosed is a non-aqueous electrolyte for a lithium ion battery, characterized by comprising a compound A and a compound B, where the compound A is at least one of the compounds as shown in the following formula (I), formula (II), and formula (III), and the compound B is the compound as shown in the following formula (IV), where formula (I): R1-COO-R2; and formula (II): R3-OCOO-R4. In formula (I), R1 is a hydrogen atom, C1-C5 hydrocarbyl or C1-C5 fluorohydrocarbyl, R2 is C1-C5 hydrocarbyl or C1-C5 fluorohydrocarbyl, and at least one of R1 and R2 contains a fluorine atom; in the formula (II), R3 and R4 are each independently selected from C1-C5 hydrocarbyl or C1-C5 fluorohydrocarbyl, and at least one of R3 and R4 contains a fluorine atom; in the formula (III), R5, R6, R7 and R8 are each independently selected from a hydrogen atom, a fluorine atom, C1-C4 hydrocarbyl or C1-C4 fluorohydrocarbyl, and at least one of R5, R6, R7 and R8 contain a fluorine atom; and in the formula (IV), R9, R10, R11, R12, R13 and R14 are each independently selected from one of a hydrogen atom, a fluorine atom or C1-C5 groups. A lithium ion battery containing the non-aqueous electrolyte has an excellent high temperature circulation performance, a high temperature storage performance and a better low temperature performance.