公开(公告)号：US20240055659A1

公开(公告)日：2024-02-15

申请号：US18258422

申请日：2021-12-16

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Yunxian QIAN ,  Shiguang HU ,  Chaowei CAO ,  Pengkai GUO ,  Chi WANG ,  Shuhuai XIANG ,  Qun CHEN ,  Yonghong DENG

IPC: H01M10/0567

CPC classification number: H01M10/0567 ,  H01M2300/0025

Abstract: Provided are a non-aqueous electrolyte comprising a solvent, an electrolyte salt and a first additive, wherein the first additive is selected from at least one of the compounds as shown in structural formula 1: A-D-B-E-C, structural formula 1, wherein A, B, and C are each independently selected from the group consisting of cyclic carbonate groups, cyclic sulfate groups, cyclic sulfite groups, cyclic sulfonate groups, cyclic sulfone groups, cyclic sulfoxide groups, cyclic carboxylate groups or cyclic anhydride groups; D and E are each independently selected from single bond, or groups containing hydrocarbylene groups, ether bonds, sulfur-oxygen double bonds or carbon-oxygen double bonds; and the content of methanol in the non-aqueous electrolyte is 200 ppm or less. Further disclosed is a battery comprising the non-aqueous electrolyte.

公开(公告)号：US20180076488A1

公开(公告)日：2018-03-15

申请号：US15557788

申请日：2015-12-24

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Qiao SHI ,  Qun CHEN ,  Shiguang HU ,  Qi HUANG ,  Xue ZHOU

IPC: H01M10/42 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M4/525 ,  H01M10/0569

Abstract: An electrolyte for a lithium-ion battery and a lithium-ion battery. The electrolyte for a lithium-ion battery comprises a non-aqueous organic solvent, a lithium salt, and an electrolyte additive. The additive is selected from compounds of formula 1, wherein R1 is selected from unsaturated alkyls having three to six carbon atoms, and R2 is selected from alkylenes having two to five carbon atoms. Because the molecular structure of the additive comprises both unsaturated carbon-carbon bonds and cyanos, polymerization can occur on an electrode surface to form a compound containing multiple cyanos. The compound can be complexed with metal ions on a surface of a cathode material, thereby inhibiting electrolyte decomposition on an electrode surface to improve high-temperature storage and cyclability of a battery.

公开(公告)号：US20180062203A1

公开(公告)日：2018-03-01

申请号：US15558551

申请日：2015-11-24

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD

Inventor： Qiao SHI ,  Shiguang HU ,  Qun CHEN ,  Qi HUANG ,  Xue ZHOU

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/0568 ,  H01M4/131

CPC classification number: H01M10/0567 ,  H01M4/131 ,  H01M4/133 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2220/20 ,  H01M2300/004

Abstract: Disclosed is a lithium ion battery non-aqueous electrolyte and a lithium ion battery, in which the electrolyte comprises: a non-aqueous organic solvent, a lithium salt and an additive, said additive comprises: a compound represented by the structural formula 1 and a compound represented by the structural formula 2, in which R is an alkyl selected from an alkyl group having 1 to 4 carbon atoms, the ratio of the content of the compound represented by the structural formula 1 to the total mass of the lithium ion battery non-aqueous electrolyte is 0.1% to 2%, and the ratio of the content of the compound represented by the structural formula 2 to the total mass of the lithium ion battery non-aqueous electrolyte is less than 0.5%.