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.

公开(公告)号：US11876169B2

公开(公告)日：2024-01-16

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 ,  H01M4/02 ,  H01M10/0568

CPC classification number: H01M10/0525 ,  H01M4/131 ,  H01M10/0567 ,  H01M10/0569 ,  H01M10/0568 ,  H01M2004/028 ,  H01M2300/0025 ,  H01M2300/0028 ,  H01M2300/0037

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：US20230411689A1

公开(公告)日：2023-12-21

申请号：US18034377

申请日：2021-10-28

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Chaowei Cao ,  Chi Wang ,  Qun Chen ,  Shiguang Hu

IPC: H01M10/0567 ,  H01M10/0525

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

Abstract: The present application belongs to the technical field of new energy, in particular to a non-aqueous electrolyte for a lithium ion battery and a lithium ion battery. The non-aqueous electrolyte for a lithium ion battery comprises a non-aqueous organic solvent, a lithium salt, and a spiro compound represented by Structural Formula 1. The compound represented by Structural Formula 1 has the characteristic of sulfonate additives to improve high-temperature storage performance of battery, and also has the characteristic of sulfate additives to improve high-temperature cycle performance of battery. A passivation film is deposited on the surface of positive electrode, and functional group X is further crosslinked to make the coated passivation film more compact and stable, which can effectively improve the electrochemical performance of the electrode, the storage performance and self-discharge performance of the battery.

公开(公告)号：US20230231126A1

公开(公告)日：2023-07-20

申请号：US17772130

申请日：2022-04-06

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

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

IPC: H01M4/525 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/62

CPC classification number: H01M4/525 ,  H01M4/366 ,  H01M10/0525 ,  H01M4/625

Abstract: Provided is a lithium ion battery, comprising a positive electrode containing a positive electrode material layer, a negative electrode and a non-aqueous electrolyte, the layer comprises a positive electrode active material, the material comprises LixNiyCozM1-y-zO2, M is at least one element selected from Mn and Al, the material is doped or coated with an element E, which is selected from one or more of Ba, Zn, Ti, Mg, Zr, W, Y, Si, Sn, B, Co, and P, a potential range of the positive electrode active material with respect to lithium metal is ≥4.25V;



the non-aqueous electrolyte comprises a solvent, an electrolyte salt and an additive, the additive comprises a compound represented by structural formula 1:










the lithium ion battery meets the following requirements:






0.1≤(H/T)×M/1000≤10; and



80≤H≤150,0.005≤T≤0.8,0.05≤M≤3.

The lithium ion battery provided by the application has a lower battery impedance and excellent high-temperature cycle performance.

公开(公告)号：US11362370B2

公开(公告)日：2022-06-14

申请号：US16316621

申请日：2016-12-30

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Qiao Shi ,  Muchong Lin ,  Shiguang Hu ,  Xionggui Lin ,  Jiaojiao Yun ,  Chang'an Zeng

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569 ,  C07D317/10 ,  C07D327/10 ,  C07F9/06 ,  C07F9/113 ,  H01M10/056

Abstract: A non-aqueous electrolyte for a lithium-ion battery and a lithium-ion battery. The non-aqueous electrolyte comprises unsaturated phosphate compounds and unsaturated cyclic carboxylic acid anhydride compounds. The unsaturated phosphate compounds have the structure illustrated in structural formula 4; structural formula 4: R13, R11, and R12 are independently selected from hydrocarbon groups having 1-5 carbon atoms respectively, and at least one of R13, R11, and R12 is an unsaturated hydrocarbon group containing double bonds or triple bonds; the unsaturated cyclic carboxylic acid anhydride compounds have the structure illustrated in structural formula 5; structural formula 5: R14 is independently selected from vinylidene having 2-4 carbon atoms or fluoro-substituted vinylidene. By means of the synergistic effect of two compounds, the non-aqueous electrolyte has excellent high-temperature cycling performance and storage performance, and also has lower impedance and good low-temperature performance.

公开(公告)号：US11362369B2

公开(公告)日：2022-06-14

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 ,  H01M4/02 ,  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：US20230402653A1

公开(公告)日：2023-12-14

申请号：US18036400

申请日：2021-11-17

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Yunxian Qian ,  Shiguang Hu ,  Hongmei Li ,  Xiaogang Yuan ,  Yonghong Deng

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/58 ,  H01M10/0569 ,  H01M10/0568 ,  H01M10/42 ,  C07C265/14

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M4/5825 ,  H01M10/0569 ,  H01M10/0568 ,  H01M10/4235 ,  C07C265/14 ,  H01M2004/028

Abstract: The application relates to the technical field of lithium ion batteries and discloses a lithium ion battery. The lithium ion battery comprises a positive electrode, a negative electrode, a separator arranged between the positive electrode and negative electrode, and a non-aqueous electrolyte; an active material of the positive electrode comprises LiFePO4, the non-aqueous electrolyte comprises an organic solvent, a lithium salt, vinylene carbonate and a compound represented by Formula (1), wherein R1 is one or more of chain, cyclic and aromatic group with 2-20 carbon atoms, and a compacted density of the positive electrode material is more than 2 g/cm3. The lithium ion battery provided by the application may obviously improve the cycle and storage performances at high temperature, greatly improve the capacity retention rate and capacity recovery rate of battery, obviously reduce the thickness expansion rate after high-temperature storage, and meanwhile, greatly reduce the precipitation of iron ions.

公开(公告)号：US10923762B2

公开(公告)日：2021-02-16

申请号：US16316618

申请日：2016-12-29

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

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

IPC: H01M10/0525 ,  H01M10/0567 ,  H01M4/525 ,  H01M4/38 ,  H01M4/587 ,  H01M4/36

Abstract: A lithium-ion battery, comprising a cathode, an anode, and a non-aqueous electrolyte; the cathode comprises a cathode active material and a metal oxide and/or metal fluoride coating which covers the surface of the cathode active material; the cathode active material is at least one of materials illustrated in general formula I or II: formula I: LixNiyM1-yO2, wherein 0.5≤x≤1.2, 0.5≤y≤1, and M is selected from at least one of Co, Mn, Al, Ti, Fe, Zn, Zr, Cr, and formula II: LikCozL1-zO2, wherein 0.5≤k≤1.2, 0.5

公开(公告)号：US20200227784A1

公开(公告)日：2020-07-16

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 ,  H01M10/0525 ,  H01M10/0565

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.