公开(公告)号：US20220059868A1

公开(公告)日：2022-02-24

申请号：US17519565

申请日：2021-11-04

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Qiao Shi ,  Muchong Lin ,  Shiguang Hu ,  Jiaojiao Yun

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

Abstract: The application provides a non-aqueous electrolyte for lithium ion battery. The non-aqueous electrolyte for lithium ion battery comprises a compound A represented by formula I and a compound B represented by formula II, In formula I, R1, R2 and R3 are independently selected from C1-C5 alkyl or haloalkyl, C2-C5 unsaturated hydrocarbon group or unsaturated halohydrocarbon group, and at least one of R1, R2 and R3 is the unsaturated hydrocarbon group or unsaturated halohydrocarbon group; In formula II, R4, R5, R6, R7, R8 and R9 are each independently selected from one of hydrogen atom, fluorine atom and C1-C5 group. The non-aqueous electrolyte for lithium ion battery provided by the application enables the battery to have excellent cycle performance and high-temperature storage performance through the synergistic effect of the compound A and the compound B.

公开(公告)号：US11177506B2

公开(公告)日：2021-11-16

申请号：US16490895

申请日：2017-06-23

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Qiao Shi ,  Muchong Lin ,  Shiguang Hu ,  Guanjie Ai

IPC: H01M10/0567 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/02

Abstract: To address the existing problem of insufficient cycle performance and high-temperature storage performance of lithium ion battery electrolyte at high pressure, the disclosure provides a non-aqueous electrolyte for lithium ion battery. The non-aqueous electrolyte for lithium ion battery comprises a cyano-containing compound A and a compound B represented by formula I, The non-aqueous electrolyte for lithium ion battery provided by the disclosure contains both the cyano-containing compound A and the compound B, so that the lithium ion battery containing the non-aqueous electrolyte can have better cycle performance and high-temperature storage performance at high pressure.

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：US20250062412A1

公开(公告)日：2025-02-20

申请号：US18721453

申请日：2022-12-07

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Yunxian Qian ,  Zhongbo Liu ,  Shiguang Hu ,  Yonghong Deng ,  Yong Wang ,  Xiong Huang

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/525 ,  H01M4/583 ,  H01M10/0568 ,  H01M10/0569

Abstract: A non-aqueous electrolyte is provided and includes an electrolyte salt, a non-aqueous organic solvent, and an additive. The non-aqueous organic solvent includes a carboxylate, and the additive comprises a compound represented by formula 1: where n is 0 or 1, A is selected from C or O, X is selected from R1 and R2 are each independently selected from H, R1 and R2 are not selected from H simultaneously, and X, R1 and R2 at least contain one sulfur atom. The non-aqueous electrolyte satisfies following conditions: 0.02≤an/m≤9, 0.01%≤a≤5%, 5%≤m≤70%, and 8%≤n≤25%; where a is a mass percentage content of the compound represented by the formula 1 in the non-aqueous electrolyte, in %; m is a mass percentage content of the carboxylate in the non-aqueous electrolyte, in %; and n is a mass percentage content of the electrolyte salt in the non-aqueous electrolyte, in %. A conductivity of the non-aqueous electrolyte at 25° C. is greater than or equal to 5 mS/cm.

公开(公告)号：US20240421353A1

公开(公告)日：2024-12-19

申请号：US18697481

申请日：2022-12-13

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Yunxian Qian ,  Shiguang Hu ,  Yonghong Deng ,  Weixin Liu ,  Yong Wang ,  Xionggui Lin ,  Li Guo ,  Yanmei Jin

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M10/0525

Abstract: In order to overcome the problems of battery expansion and capacity attenuation of the existing lithium ion battery during long-term high-temperature cycle, the application provides a lithium ion battery, which comprises a positive electrode, a negative electrode and a non-aqueous electrolyte, the non-aqueous electrolyte comprise an additive A, an additive B and an additive C; the lithium ion battery satisfies the following condition: 0 . 0 ⁢ 1 ⁢ 5 ≤ ( a + b + c ) × V ≤ 0.09 ; when the lithium ion battery meets the condition of 0.015≤(a+b+c)×V≤0.09, the problem of gas production of electrolyte during long-term high-temperature cycle can be effectively solved, and the expansion rate of battery can be effectively reduced. Meanwhile, with catalysis under higher voltage, the additive could undergo special oxidation reaction on the positive electrode surface, forming a more stable and good protective film, which makes the positive electrode better protected, thus effectively improving the long-term high-temperature cycle capacity retention rate of the battery.

公开(公告)号：US20240322242A1

公开(公告)日：2024-09-26

申请号：US18577680

申请日：2022-06-21

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Shuhuai Xiang ,  Yang Yi ,  Shiguang Hu ,  Yong Zhang

IPC: H01M10/0567 ,  C07F5/04 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/42

CPC classification number: H01M10/0567 ,  C07F5/04 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/4235 ,  H01M2300/004

Abstract: Provided is a non-aqueous electrolyte, comprising a solvent, an electrolyte salt and a compound represented by structural formula 1:




wherein, A, G and X are each independently selected from a cyclic sulfate group and its derivatives, a cyclic sulfonate group and its derivatives, a cyclic sulfite group and its derivatives or a group D; one or none of A, G and X is selected from the group D, and the group D is selected from a C1-C4 alkyl group, a C1-C4 unsaturated hydrocarbon group, a C1-C4 haloalkyl group, a C1-C4 nitrile group, a C1-C4 ether group or a C1-C4 ketone group. The application also provides a battery comprising the non-aqueous electrolyte. By adopting the above compound as an additive for the non-aqueous electrolyte, the film-forming quality of the surfaces of positive and negative electrodes can be effectively improved, and thus the battery performance is improved.

公开(公告)号：US20240194871A1

公开(公告)日：2024-06-13

申请号：US18279052

申请日：2022-03-29

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Yunxian Qian ,  Shiguang Hu ,  Xiaoxia Xiang ,  Hongmei Li ,  Chaowei Cao ,  Yonghong Deng

IPC: H01M4/58 ,  H01M10/052 ,  H01M10/0567

CPC classification number: H01M4/5825 ,  H01M10/052 ,  H01M10/0567 ,  H01M2004/021

Abstract: Provided is a lithium iron phosphate battery, comprising a positive electrode, a negative electrode and a non-aqueous electrolyte, wherein the positive electrode comprises a positive electrode material layer with a compacted density of 2.3-2.8 g/cc, and the positive electrode material layer comprises a positive electrode active material, the positive electrode active material comprises LiFePO4; the non-aqueous electrolyte comprises a solvent, an electrolyte salt, vinylene carbonate and a compound represented by Structural formula 1; an addition amount of the compound represented by Structural formula 1 is 0.01-5% based on a total mass of the non-aqueous electrolyte being 100%. The lithium iron phosphate battery provided by the application adopts the combination of vinylene carbonate and the compound represented by Structural formula 1, which can inhibit the generation of lithium dendrites and dissolution of Fe, and ultimately improve the high-temperature and safety performance of the High-compacted-density lithium iron phosphate battery.


A-D-B-E-C  Structural formula 1