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：US20200313237A1

公开(公告)日：2020-10-01

申请号：US16770281

申请日：2018-06-27

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Shiguang Hu ,  Qiao Shi ,  Zhaohui Deng ,  Xionggui Lin

IPC: H01M10/0567 ,  H01M10/0525

Abstract: In order to solve the problems of insufficient high-temperature storage performance and high-temperature cycle performance of the existing lithium ion battery, the present application provides a non-aqueous electrolyte for lithium ion battery, comprising a bicyclic sulfate compound and a compound A represented by structural formula 1. In structural formula 1, R3, R4, R5, R6, R7 and R8 are each independently selected from hydrogen, fluorine atom or a group containing 1˜5 carbon atoms. Meanwhile, the application also discloses a lithium ion battery comprising the non-aqueous electrolyte for lithium ion battery. The non-aqueous electrolyte for lithium ion battery provided by the application is beneficial to improving high-temperature storage and high-temperature cycle performance of battery.

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.

公开(公告)号：US20190103633A1

公开(公告)日：2019-04-04

申请号：US16205258

申请日：2018-11-30

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Qiao Shi ,  Shiguang Hu ,  Qun Chen ,  Li Wang ,  Zhou He ,  Jiaojiao Yun

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/505 ,  H01M4/525

Abstract: A lithium-ion battery non-aqueous electrolyte and a lithium-ion battery. The non-aqueous electrolyte comprises at least one selected from the compounds represented by structural formula I and II; in formula I, R1 and R2 are independently selected from alkenyl having 2-5 carbon atoms and alkynyl having 2-5 carbon atoms; in formula II, R3 is selected from alkenyl having 2-5 carbon atoms and alkynyl having 2-5 carbon atoms. The compound represented by formula I or II is added in the electrolyte; the compound contains unsaturated bond(s) and hexafluorisopropyl; the unsaturated bond(s) form passivation film on cathode and anode surfaces to inhibit decomposition of the electrolyte on the cathode&anode surface and damage of the cathode material structure; moreover, the polymerization degree of unsaturated bond(s) can be inhibited to some extent due to steric hindrance relationship of fluoroisopropyl functional groups, so as to improve high-temperature performance of the lithium-ion battery while guaranteeing low-temperature performance.

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：US20160301104A1

公开(公告)日：2016-10-13

申请号：US15037699

申请日：2014-10-22

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Qiao Shi ,  Muchong Lin ,  Dixiong Zhou

IPC: H01M10/0567 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028 ,  H01M2300/0034 ,  H01M2300/0042

Abstract: The present invention relates to electrolyte of a high-voltage lithium-ion battery, comprising a non-aqueous organic solvent, lithium salt and an electrolyte additive; the electrolyte additive comprises the following ingredients based on the total weight of the electrolyte: 1%-10% of fluoroethylene carbonate, 1%-5% of dinitrile compound and 0.1%-2% of 2-methyl maleic anhydride; further, the electrolyte can be further added with additives such as 0.2%-2% of lithium bisoxalatoborate and 1,3-propane sultone. The present invention also relates to a high-voltage lithium-ion battery using the electrolyte, with the charging cut-off voltage being greater than 4.2V and smaller than or equal to 4.5V. The electrolyte of the high-voltage lithium-ion battery provided by the present invention can protect the positive electrode and also form good SEI at the negative electrode, and the high-voltage lithium-ion battery has good cycle performance and storage performance.

Abstract translation: 本发明涉及包含非水有机溶剂，锂盐和电解质添加剂的高压锂离子电池的电解质; 电解质添加剂包含以电解质总量计的以下成分：1％-10％的氟代碳酸亚乙酯，1％-5％的二腈化合物和0.1％-2％的2-甲基马来酸酐; 此外，电解质可以进一步添加添加剂，例如0.2％-2％的双草酸硼酸锂和1,3-丙磺酸内酯。 本发明还涉及使用电解质的高压锂离子电池，充电截止电压大于4.2V且小于或等于4.5V。 本发明提供的高电压锂离子电池的电解质可以保护正极，并且在负电极上形成良好的SEI，高压锂离子电池具有良好的循环性能和存储性能。

公开(公告)号：US20250140487A1

公开(公告)日：2025-05-01

申请号：US18693517

申请日：2022-09-21

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Xiaoxia Xiang ,  Zhengsheng Zhang ,  Yunxian Qian

IPC: H01G11/64 ,  H01G11/04 ,  H01G11/60

Abstract: In order to overcome the problem that the electrochemical performance of the existing supercapacitor is seriously deteriorated at low temperature, the application provides a supercapacitor, comprising a positive electrode, a negative electrode and an organic electrolyte solution, wherein the organic electrolyte solution comprises an organic electrolyte, a proton inert solvent and an additive, and the additive comprises a compound represented by structural formula 1: wherein R1-R6 are each independently selected from a hydrocarbon group with 1-5 carbon atoms, a siloxane group substituted by a hydrocarbon group with 1-3 carbon atoms, an unsubstituted siloxane group, or hydrogen; the positive electrode and negative electrode are both porous carbon materials, and the porous carbon material and the compound represented by structural formula 1 meet the following condition: 0.1 ≤ BET * Vt * Mt 1700 ≤ 7.5 . The supercapacitor provided by the application has lower ESR (equivalent series resistance) and better high and low temperature performances.

公开(公告)号：US20240332732A1

公开(公告)日：2024-10-03

申请号：US18741803

申请日：2024-06-13

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： ZHONGBO LIU ,  YONGHONG DENG ,  HONGLI XU ,  XIAOHU AO ,  ZHONGTIAN ZHENG

IPC: H01M50/414 ,  H01M10/0525 ,  H01M10/0567 ,  H01M50/449 ,  H01M50/491

CPC classification number: H01M50/414 ,  H01M10/0525 ,  H01M10/0567 ,  H01M50/449 ,  H01M50/491 ,  H01M2300/0025

Abstract: The present invention relates to the technical field of lithium batteries, and in particular, to a lithium battery separator and a lithium battery. The separator comprises a block polymer, the porosity of the separator is p, the mass percentage of the block polymer relative to the separator is w, and the relationship between the porosity p of the separator and the relative mass percentage w of the block polymer satisfies that (1−w)/3

公开(公告)号：US20240097187A1

公开(公告)日：2024-03-21

申请号：US18269755

申请日：2021-12-16

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Yunxian Qian ,  Shiguang Hu ,  Guiyan Sun ,  Xionggui Lin ,  Yonghong Deng

IPC: H01M10/0567 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0568 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M4/525 ,  H01M4/623 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2004/028

Abstract: The existing positive electrode material that is doped or coated with compound has the problem OF ion dissolution and battery performance deterioration at high temperature. To solve it, the invention provides a lithium-ion battery, comprising a positive electrode, a negative electrode and a non-aqueous electrolyte, wherein the positive electrode comprises a positive electrode material layer, the positive electrode material layer comprises a positive electrode active material, and the positive electrode active material comprises LiMO2, where M is selected from one or more of Ni, Co and Mn, and the positive electrode active material is doped with a compound containing metal element A and/or coated with a compound containing metal element A, the non-aqueous electrolyte comprises a solvent, an electrolyte salt and a compound represented by Structural formula 1. The lithium-ion battery provided by the invention could effectively improve the overall stability of the material.

公开(公告)号：US11881555B2

公开(公告)日：2024-01-23

申请号：US16770281

申请日：2018-06-27

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Shiguang Hu ,  Qiao Shi ,  Zhaohui Deng ,  Xionggui Lin

IPC: H01M10/0567 ,  H01M10/0525

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

Abstract: In order to solve the problems of insufficient high-temperature storage performance and high-temperature cycle performance of the existing lithium ion battery, the present application provides a non-aqueous electrolyte for lithium ion battery, comprising a bicyclic sulfate compound and a compound A represented by structural formula 1. In structural formula 1, R3, R4, R5, R6, R7 and R8 are each independently selected from hydrogen, fluorine atom or a group containing 1˜5 carbon atoms. Meanwhile, the application also discloses a lithium ion battery comprising the non-aqueous electrolyte for lithium ion battery. The non-aqueous electrolyte for lithium ion battery provided by the application is beneficial to improving high-temperature storage and high-temperature cycle performance of battery.