公开(公告)号：US10826123B2

公开(公告)日：2020-11-03

申请号：US16084929

申请日：2016-07-27

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Qiao Shi ,  Muchong Lin ,  Shiguang Hu ,  Hailing Zhang ,  Qi Guo

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/525 ,  H01M10/0569 ,  H01M10/0568

Abstract: The present invention discloses a lithium-ion battery electrolyte and a lithium-ion battery. The electrolyte comprises an organic non-aqueous solution, a lithium salt, and an additive. The additive comprises: (A) fluoroethylene carbonate; (B) at least one compound from the following: a saturated dinitrile or an unsaturated nitrile as represented by structural formula (1), wherein R1 is an unsaturated hydrocarbon group with 3-6 carbon atoms and R2 is an alkene group with 2-5 carbon atoms; and (C) at least one unsaturated phosphate ester as represented by structural formula (2), wherein R3, R4, and R5 are each a hydrocarbon with 1-4 carbon atoms, and at least one of R3, R4, and R5 contain an unsaturated hydrocarbon with a triple bond.

公开(公告)号：US20190207259A1

公开(公告)日：2019-07-04

申请号：US16311668

申请日：2016-12-29

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Qiao Shi ,  Muchong Lin ,  Hailing Zhang ,  Shiguang Hu ,  Longlong Ju

IPC: H01M10/0567 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M2300/0025

Abstract: A non-aqueous electrolyte of a lithium-ion battery and a lithium-ion battery. The non-aqueous electrolyte of the lithium-ion battery comprises a non-aqueous organic solvent, a lithium salt, and an additive. The additive comprises unsaturated phosphate as illustrated in the following structural formula (A) and lithium difluorophosphate, wherein in formula (A), R1 and R2 are independently selected from C2-C5 unsaturated hydrocarbyl groups, and R3 is one of C1-C6 saturated hydrocarbyl groups, C1-C6 unsaturated hydrocarbyl groups, and fluorinated hydrocarbyl groups. In the non-aqueous electrolyte of the lithium-ion battery, a combination of lithium difluorophosphate and unsaturated phosphate at least containing two unsaturated groups can reduce impedance of the lithium-ion battery and further improve high-temperature performance of the battery, so that the lithium-ion battery has better low-temperature performance and high-temperature cycling performance.