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：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

公开(公告)号：US20240178368A1

公开(公告)日：2024-05-30

申请号：US18010818

申请日：2022-11-16

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Yonghong Deng ,  Yunxian Qian ,  Shiguang Hu ,  Guiyan Sun ,  Xiaoxia Xiang ,  Xionggui Lin ,  Chaowei Cao

IPC: H01M4/134 ,  H01M10/0567

CPC classification number: H01M4/134 ,  H01M10/0567 ,  H01M2004/027 ,  H01M2300/0028

Abstract: The present application provides a secondary battery, including a positive electrode, a negative electrode with a negative electrode material layer, and a non-aqueous electrolyte, the negative electrode material layer comprises a negative electrode active material, and the negative electrode active material comprises a silicon-based material;
the non-aqueous electrolyte comprises a solvent, an electrolyte salt and an additive, the additives comprises a compound represented by structural formula 1;




wherein 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 at the same time, and X, R1 and R2 comprise at least one sulfur atom;








the secondary battery meets the following requirements:







0
.
2

⁢
1

≤


m
*
n
*
r

S

≤
40

;




and 40%≤m≤90%, 0.05%≤n≤2%, 1.2 g/cm3≤r≤1.8 g/cm3, 5%≤S≤30%.

公开(公告)号：US11961966B2

公开(公告)日：2024-04-16

申请号：US17294176

申请日：2019-11-22

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Dejun Xiong ,  Qiao Shi ,  Shiguang Hu ,  Jiaojiao Yun

IPC: H01M10/00 ,  C07F9/09 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/02

CPC classification number: H01M10/0567 ,  C07F9/09 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2004/028

Abstract: Provided is a non-aqueous electrolyte, comprising a solvent, a lithium salt, an additive A and an additive B, the additive A is selected from compound represented by structural formula 1, and the additive B is selected from one or more of compounds represented by structural formula 2 and structural formula 3:






R1 is an alkenyl with 2-5 carbon atoms or an alkynyl with 2-5 carbon atoms, R2 is a fluoroalkyl with 1-5 carbon atoms, R3 is an alkyl with 1-4 carbon atoms, an aryl with 6-10 carbon atoms, an alkenyl with 2-5 carbon atoms, an alkynyl with 2-5 carbon atoms or a fluoroalkyl with 1-5 carbon atoms. Meanwhile, the invention also discloses a lithium ion battery comprising the non-aqueous electrolyte. The non-aqueous electrolyte provided by the invention can effectively give consideration to both high and low temperature performances of the battery.

公开(公告)号：US11958820B2

公开(公告)日：2024-04-16

申请号：US18081715

申请日：2022-12-15

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Baichun Yang ,  Qiyou Huang ,  Zihao Ye ,  Ao He

IPC: C07D317/38

CPC classification number: C07D317/38

Abstract: The present invention relates to the technical field of chemical industry, and in particular to a method for purifying ethylene carbonate through dynamic crystallization, which includes the following steps: adding an ethylene carbonate-containing raw material into a cavity of a crystallization device under a condition of stirring for dynamic crystallization, wherein the crystallization device further includes a jacket attached and circumferentially disposed along the outer wall of the cavity, the jacket is provided with cooling water therein, a temperature of the cooling water is 1-2.5° C. lower than the temperature in the cavity until a granular ethylene carbonate crystal is generated. The present invention using a rake dryer as the crystallization device to realize dynamic crystallization at a certain rotating speed. The technical solution is simple to operate and short in processing cycle, which facilitates improvement in production efficiency and product quality and is suitable for industrial application.

公开(公告)号：US20230327210A1

公开(公告)日：2023-10-12

申请号：US18335767

申请日：2023-06-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD. ,  Shenzhen Capchem Technology Co.,Ltd.

Inventor： Qiang Ma ,  Yonghong Deng ,  Guangzhao Zhang ,  Xiang Hong

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

CPC classification number: H01M10/0569 ,  H01M10/0525 ,  H01M2300/0054 ,  H01M10/0568 ,  H01M2300/004 ,  H01M10/0567

Abstract: This application provides a battery electrolytic solution, including an electrolyte salt and a non-aqueous organic solvent. The non-aqueous organic solvent includes a first organic solvent shown in a formula (I) and/or a second organic solvent shown in a formula (II): R1—S(═O)x—N(—R3)—R2 formula (I); and R1—S(═O)x—N(—R3)—S(═O)y—R4 formula (II). R1 and R4 are separately selected from fluoroalkyl, fluoroalkoxy, fluoroalkenyl, fluoroalkenyloxy, fluoroaryl, or fluoroaryloxy. R2 and R3 are separately selected from alkyl, alkoxy, alkenyl, alkenyloxy, aryl, or aryloxy. x is 1 or 2, and y is 1 or 2. A total content in mass of the first organic solvent and/or the second organic solvent in the electrolytic solution ranges from 10% to 90%. The electrolytic solution includes the first organic solvent and/or the second organic solvent of a high content in mass.

公开(公告)号：US20230212108A1

公开(公告)日：2023-07-06

申请号：US18080682

申请日：2022-12-13

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： YUANYUAN KANG ,  PENGCHENG TU ,  XIANSHUAI ZOU ,  XIWU TANG ,  SENWEI CHEN

IPC: C07C69/96

CPC classification number: C07C69/96

Abstract: The present invention relates to the technical field of chemical engineering, and in particular to a linear carbonate and a preparation method thereof, which includes one or more of compounds of structural formula 1 below:




wherein R1 and R2 are respectively selected from one of alkyl groups containing 1˜4 carbon atoms;
a hydroxyl concentration of the linear carbonate is no more than 100 ppm, and a free acid conversion rate of a solution with a concentration of 1 mol/L as formulated from the linear carbonate and lithium hexafluorophosphate is less than 1.2 after storage under 25° C. for 30 days. An acidity conversion rate was reduced when lithium hexafluorophosphate is dissolved in the linear carbonate by controlling the hydroxyl concentration, the energy density, discharge capacity, safety performance and service life of a battery can be improved when it's electrolyte solution contains the linear carbonate.

公开(公告)号：US20230163308A1

公开(公告)日：2023-05-25

申请号：US17920822

申请日：2021-04-23

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Zhongbo Liu ,  Xiaohu Ao ,  Yonghong Deng ,  Yuanyuan Kang ,  Yunxian Qian

IPC: H01M4/62 ,  H01M4/36 ,  H01M4/38 ,  H01M4/40

CPC classification number: H01M4/628 ,  H01M4/366 ,  H01M4/382 ,  H01M4/405 ,  H01M4/387 ,  H01M4/381 ,  H01M2004/027

Abstract: In order to overcome the problem of metal dendrites caused by uneven deposition on the surface of the existing metal electrode, the present application provides a metal electrode, comprising a metal layer and a coating, the coating comprises at least one block copolymer; the block copolymer comprises a first polymer block for independently conducting metal ions and a second polymer block for providing mechanical strength; a shear modulus of the coating is ≥107 Pa, and a thickness of the coating is 500 nm-50 μm. Meanwhile, the application also discloses a battery comprising the metal electrode. The metal electrode provided by the application has good ionic conductivity and inhibition capability for metal dendrite.

公开(公告)号：US20220263133A1

公开(公告)日：2022-08-18

申请号：US17735109

申请日：2022-05-02

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 ,  C07D327/10 ,  C07F9/06 ,  C07D317/10 ,  C07F9/113 ,  H01M10/056

Abstract: A non-aqueous electrolyte for a lithium-ion battery and a lithium-ion battery. The non-aqueous electrolyte includes an unsaturated phosphate compound and a cyclic unsaturated carboxylic anhydride compound. The unsaturated phosphate compound has a structure represented by structural formula (4). R13, R11 and R12 are each independently selected from a hydrocarbon group having 1 to 5 carbon atoms, and at least one of R13, R11 and R12 is an unsaturated hydrocarbon group having a double bond or a triple bond. The unsaturated cyclic carboxylic anhydride compound having a structure represented by Structural Formula 5. R14 is selected from the group consisting of an alkenylene group having 2 to 4 carbon atoms or a fluorinated alkenylene group having 2 to 4 carbon atoms. 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：US11380937B2

公开(公告)日：2022-07-05

申请号：US16632862

申请日：2017-12-28

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Zhongtian Zheng ,  Ling Zhong ,  Shiguang Hu ,  Qiao Shi ,  Changchun Chen ,  Zhaohui Deng

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  C07D317/36

Abstract: Provide is a non-aqueous electrolyte for lithium ion battery, comprising a compound represented by structural formula I: In formula I, R1, R2, R3 and R4 are each independently selected from hydrogen atom, fluorine atom, cyano group, hydrocarbyl group or halogenated hydrocarbyl group having 1-5 carbon atoms, oxygen-containing hydrocarbyl group having 1-5 carbon atoms, silicon-containing hydrocarbyl group having 1-5 carbon atoms, X is a —O—R5—CN group, R5 is a hydrocarbyl group or a halogenated hydrocarbyl group having 1-5 carbon atoms, m, n, z and y are integers of 0 or 1, and m+n+y+z≠0. When the non-aqueous electrolyte is used for lithium ion battery, the decomposition of electrolyte on the surface of electrode can be inhibited, and the high-temperature storage performance is improved with less gas generation and small expansion rate, therefore the high-temperature cycle performance and high-temperature storage performance of the battery are effectively improved.