公开(公告)号：US20200161704A1

公开(公告)日：2020-05-21

申请号：US16610905

申请日：2017-06-23

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

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

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569 ,  C07D407/04 ,  C07F7/18

Abstract: To solve the problems that the existing non-aqueous electrolyte for lithium ion battery containing fluorinated solvent generates serious gas expansion when improving high-temperature cycle performance and affects high-temperature safety performance of battery. The application provides a non-aqueous electrolyte for lithium ion battery. The non-aqueous electrolyte for lithium ion battery comprises a compound A and a compound B, wherein the compound A is at least one of compounds represented by the following structural formula I, formula II and formula III; the compound B is a compound represented by the following structural formula IV; formula I: R1—COO—R2; formula II: R3—OCOO—R4. The non-aqueous electrolyte for lithium ion battery provided by the invention contains both the compound A and the compound B, the synergistic effect of compound A and compound B can effectively improve high-temperature cycle performance and high-temperature storage performance of battery, and can also give consideration to low-temperature performance of battery.

公开(公告)号：US20200020973A1

公开(公告)日：2020-01-16

申请号：US16490900

申请日：2017-06-22

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Qiao Shi ,  Muchong Lin ,  Shiguang Hu ,  Ruixing Liu

IPC: H01M10/0525 ,  H01M10/0566

Abstract: In order to solve the problem of insufficient cycle performance and high-temperature storage performance of the existing non-aqueous electrolyte for lithium ion battery containing maleic anhydride copolymer, 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, R7 and R8 are independently selected from one of hydrogen atom, halogen atom, —O—R9 or aryl, wherein n is a positive integer and R9 is a C1-C4 alkyl group; In formula II, R1, R2, R3, R4, R5 and R6 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 invention can improve the cycle stability and high-temperature storage performance of the battery through the effections of compound A and compound B.

公开(公告)号：US10530016B2

公开(公告)日：2020-01-07

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：US20190393551A1

公开(公告)日：2019-12-26

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 ,  H01M10/0525 ,  H01M4/525

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：US20250087749A1

公开(公告)日：2025-03-13

申请号：US18580635

申请日：2022-06-20

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Shuhuai Xiang ,  Zhongcang Zhou ,  Yang Yi ,  Shiguang Hu

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

Abstract: The application relates to the technical field of lithium ion batteries, in particular to a non-aqueous electrolyte and a lithium ion battery. In order to overcome the technical problem of poor high-temperature performance of the existing lithium ion battery, the application provides a non-aqueous electrolyte, comprising a solvent, a lithium salt and at least one of bicyclic compound represented by structural formulas 1-1 to 1-3: Meanwhile, the application also discloses a lithium ion battery comprising the non-aqueous electrolyte. The non-aqueous electrolyte and the lithium ion battery provided by the application can effectively improve the high-temperature cycle performance and high-temperature storage performance of battery.

公开(公告)号：US20240356070A1

公开(公告)日：2024-10-24

申请号：US18292337

申请日：2022-06-20

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Shiguang Hu ,  Yunxian Qian ,  Zhengsheng Zhang ,  Xiaoxia Xiang ,  Yonghong Deng

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/505 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/42

CPC classification number: H01M10/0567 ,  H01M4/505 ,  H01M4/625 ,  H01M10/0525 ,  H01M10/4235 ,  H01M2004/028 ,  H01M2300/004

Abstract: The application relates to the technical field of electrochemistry, in particular to a lithium ion battery, which comprises a positive electrode, a negative electrode and an electrolyte; the positive electrode comprises a positive electrode active material and a conductive agent, the positive electrode active material is a manganese-containing positive electrode material; the electrolyte comprises a compound represented by the following structural formula 1:




The positive electrode active material, the conductive agent and the compound represented by structural formula 1 meet the following condition:





0
.
5

≤


D
⁢
r
×
T
⁢
r

w

≤

1
⁢
6





wherein, Dr and Tr are the ratios of the average particle size and specific surface area of the positive electrode active material to the conductive agent, respectively; w is the mass percentage of the compound represented by structural formula 1 in the electrolyte, and the unit is %.

公开(公告)号：US12107228B2

公开(公告)日：2024-10-01

申请号：US17417111

申请日：2020-01-02

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Zhongtian Zheng ,  Ling Zhong ,  Shiguang Hu ,  Kai Tu ,  Qiao Shi ,  Dejun Xiong

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

CPC classification number: H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2300/0034

Abstract: To solve the problem that the existing non-aqueous electrolyte for a lithium ion battery cannot ensure the high-temperature storage performance and cycle performance at the same time, the invention provides a non-aqueous electrolyte for a lithium ion battery, comprising a solvent, a lithium salt and a compound represented by structural formula 1 and/or structural formula 2:




Meanwhile, the invention also discloses a lithium ion battery comprising the non-aqueous electrolyte for a lithium ion battery. The non-aqueous electrolyte provided by the invention can effectively improve the cycle performance and high-temperature storage performance of lithium ion batteries.

公开(公告)号：US11502300B1

公开(公告)日：2022-11-15

申请号：US17630514

申请日：2021-12-27

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

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

IPC: H01M4/131 ,  H01M4/60 ,  H01M10/0567 ,  H01M4/36 ,  H01M4/525 ,  H01M4/505 ,  H01M4/02

Abstract: Provided is a secondary battery, comprising a positive electrode, the positive electrode comprises a positive electrode material layer, and the positive electrode material layer comprises a positive electrode active material and a compound represented by structural formula I: the positive electrode active material includes one or more of the compounds represented by Li1+xNiaCobM′1−a−bO2−yAy and Li1+zMncL2−cO4−dBd; the positive electrode material layer meets the following requirements: 0.05≤p·u/v≤15 wherein, u is the percentage mass content of element phosphorus in the positive electrode material layer, and the unit is wt %; v is the percentage mass content of element M in the positive electrode material layer, element M is selected from one or two of Mn and Al, and the unit is wt %; p is the surface density of one single surface of the positive electrode material layer, and the unit is mg/cm2.

公开(公告)号：US11489199B2

公开(公告)日：2022-11-01

申请号：US16640055

申请日：2017-12-28

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

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

IPC: H01M10/0567 ,  H01M10/0565 ,  H01M10/0525

Abstract: In order to overcome the problems of influence of residual moisture, poor cycle performance and poor high-temperature storage performance in the existing lithium ion battery, the application provides a non-aqueous electrolyte for lithium ion battery, comprising a solvent, lithium salt and maleic anhydride copolymer, wherein the weight-average molecular weight of the maleic anhydride copolymer is less than or equal to 500,000; Furthermore, the percentage mass content of the maleic anhydride copolymer is 0.5% or more based on the total mass of the non-aqueous electrolyte being 100%. Meanwhile, the application also provides a lithium ion battery comprising the non-aqueous electrolyte. The non-aqueous electrolyte provided by the application is added with maleic anhydride copolymer with a content of more than 0.5% and a weight-average molecular weight of less than 500,000, so that the high-temperature storage and cycle performances of the lithium ion battery are effectively improved.

公开(公告)号：US11302956B2

公开(公告)日：2022-04-12

申请号：US16490899

申请日：2017-06-23

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

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

IPC: H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/131 ,  H01M4/02

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.