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：US20180076483A1

公开(公告)日：2018-03-15

申请号：US15557780

申请日：2015-10-09

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD

Inventor： Qiao SHI ,  Muchong LIN ,  Guchun CHEN ,  Shiguang HU

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/48 ,  H01M10/46

CPC classification number: H01M10/0567 ,  H01M4/48 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/46 ,  H01M2004/028 ,  H01M2300/0037

Abstract: A non-aqueous electrolyte of a lithium-ion battery and a lithium-ion battery. The electrolyte comprises a non-aqueous organic solvent, a lithium salt and an additive. The additive comprises substances containing the following compounds (A) and (B): (A), where R1, R2, R3 are independently selected from hydrocarbon groups having 1 to 4 carbon atoms respectively, and at least one of R1, R2, R3 is an unsaturated hydrocarbon group containing a triple bond; (B) lithium bis(fluorosulfonyl)imide. The nonaqueous electrolyte of the lithium-ion battery enables the lithium-ion battery to have a lower impedance and better low-temperature and high-temperature performances.

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%.

公开(公告)号：US20240313213A1

公开(公告)日：2024-09-19

申请号：US18251436

申请日：2023-03-10

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Yunxian QIAN ,  Shiguang HU ,  Yonghong DENG ,  Hongmei LI ,  Xiaoxia XIANG ,  Yong WANG ,  Zhaohua ZHANG

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/131 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0567

CPC classification number: H01M4/525 ,  H01M4/131 ,  H01M4/366 ,  H01M4/628 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2300/0025

Abstract: A positive electrode sheet includes a positive electrode current collector and a positive electrode material layer formed on the positive electrode current collector. The positive electrode material layer includes a high-nickel positive electrode material represented by formula I and a compound represented by formula II: LiaNiqCoyMzO2, Formula I, where 0.9≤a≤1.2, 0.7≤q≤1, y≥0, z≥0, and q+y+z=1. M is selected from one or both of Mn and Al. R1, R2, and R3 are each independently selected from an alkyl group of 1 to 5 carbon atoms, a fluoroalkyl group of 1 to 5 carbon atoms, an ether group of 1 to 5 carbon atoms, a fluoroether group of 1 to 5 carbon atoms, an unsaturated hydrocarbonyl group of 2 to 5 carbon atoms.

公开(公告)号：US20190089000A1

公开(公告)日：2019-03-21

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

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：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：US20190081354A1

公开(公告)日：2019-03-14

申请号：US16085067

申请日：2016-12-29

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Zhongtian ZHENG ,  Qiao SHI ,  Ling ZHONG ,  Shiguang HU ,  Changchun CHEN ,  Xionggui LIN

IPC: H01M10/0566 ,  H01M10/0525

Abstract: A lithium-ion battery non-aqueous electrolyte solution, and a lithium-ion battery using the electrolyte solution. The electrolyte solution comprises one, two, or more of a compound as represented by structural formula I. R1, R2, R3, R4, R5, and R6 are independently selected from hydrogen, halogen atom, or a group comprising 1-5 carbon atoms. Presence of the compound as represented by structural formula I provides excellent performance at a high temperature and at a low temperature to the non-aqueous lithium-ion battery electrolyte solution.

公开(公告)号：US20240304822A1

公开(公告)日：2024-09-12

申请号：US18251299

申请日：2023-03-10

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Yunxian QIAN ,  Shiguang HU ,  Yonghong DENG ,  Yong WANG ,  Hongmei LI

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/131 ,  H01M4/36 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0567

CPC classification number: H01M4/628 ,  H01M4/131 ,  H01M4/366 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2300/0025

Abstract: A positive electrode sheet includes a positive electrode current collector and a positive electrode material layer formed thereon. The positive electrode sheet has a potential range of greater than or equal to 4.25 V with respect to metal lithium. The positive electrode material layer includes a positive electrode active material doped or coated with metal elements and a compound represented by formula I. The positive electrode sheet satisfies:





0.3
≤


(

m
+
n

)


100
⁢
k


≤
59

;




and 50≤m≤10000, 50≤n≤10000, 2.8≤k≤3.8; where m is a content of the compound in the positive electrode material layer; n is a total content of the metal elements doped and coated in the positive electrode material layer; and k is a compacted density of the positive electrode material layer. A characteristic peak appears in a region having a retention time of 6.5 min to 7.5 min.

公开(公告)号：US20200303774A1

公开(公告)日：2020-09-24

申请号：US16085541

申请日：2016-12-29

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Qiao SHI ,  Muchong LIN ,  Shiguang HU ,  Hailing ZHANG ,  Qi GUO

IPC: H01M10/0567 ,  H01M10/0569 ,  H01M10/0525 ,  H01M2/16 ,  H01M4/583

Abstract: Disclosed is a lithium ion battery using a non-aqueous electrolyte. The lithium ion battery comprises a positive electrode, a negative electrode, a separator arranged between the positive electrode and the negative electrode, and a non-aqueous electrolyte of the lithium ion battery. An active substance of the positive electrode comprises LiFePO4; the non-aqueous electrolyte of the lithium ion battery comprises a non-aqueous organic solvent, a lithium salt and an additive; and the additive at least comprises (A) vinylene carbonate, and at the same time, also comprises at least one of (B) a compound shown in a structural formula 1 and (C) a fluorobenzene, wherein n is a natural number of 1-3, and each of R1, R2, R3 and R4 is independently selected from one of a hydrogen atom, a fluorine atom, and an alkyl group with 1-6 carbon atoms. The lithium ion battery has a long cycle life, and at the same time, the battery has excellent high and low temperature performance.