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：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.

公开(公告)号：US20220013810A1

公开(公告)日：2022-01-13

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

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：US20200020972A1

公开(公告)日：2020-01-16

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

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.