公开(公告)号：US20210408603A1

公开(公告)日：2021-12-30

申请号：US17059701

申请日：2020-01-20

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Wenqiang LI ,  Jian LIU ,  Mingming GUAN ,  Jianming ZHENG

IPC: H01M10/0568 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/38 ,  H01M4/36 ,  C07D327/10 ,  C07D411/14 ,  C07D411/04 ,  C07D497/04

Abstract: An electrolytic solution includes the compound of Formula I and a carboxylate compound: The electrochemical device prepared with the electrolytic solution has reduced storage impedance, and improved post-storage swelling, overcharge performance and hot box performance.

公开(公告)号：US20210257662A1

公开(公告)日：2021-08-19

申请号：US16652468

申请日：2020-01-20

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Wenqiang LI ,  Shuirong ZHANG ,  Chunrui XU ,  Juan MA

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

Abstract: The present application relates to an electrolytic solution and an electrochemical device using same. The electrolytic solution of the present application comprises a compound containing a —CN functional group and a compound containing a P—O bond. By introducing the compound containing a —CN functional group and the compound containing a P—O bond into the electrolytic solution, an active material can be better protected, thereby effectively improving floatation performance and nailing performance of a battery, and cycle impedance of the battery.

公开(公告)号：US20200099101A1

公开(公告)日：2020-03-26

申请号：US16211537

申请日：2018-12-06

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Wenqiang LI ,  Shuirong ZHANG ,  Chao TANG

IPC: H01M10/0567 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/42

Abstract: The present application relates to an electrolytic solution and an electrochemical device containing the electrolytic solution. The electrolytic solution of the present invention comprises a compound having a —CN functional group, and is capable of significantly improving the floating-charge performance, the increased impedance accompanying the long-term cycle test, and the thermal impact performance of an electrochemical device using the electrolytic solution.

公开(公告)号：US20240332618A1

公开(公告)日：2024-10-03

申请号：US18619188

申请日：2024-03-28

Applicant: Ningde Amperex Technology Limited

Inventor： Junfei LIU ,  Hui CUI ,  Yezhen ZHENG ,  Wenqiang LI

IPC: H01M10/0567 ,  C07C43/04 ,  C07C69/14 ,  C07C69/24 ,  C07C69/96 ,  C07D327/04 ,  H01G11/28 ,  H01G11/64 ,  H01M4/02 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/42

CPC classification number: H01M10/0567 ,  C07C43/04 ,  C07C43/046 ,  C07C69/14 ,  C07C69/24 ,  C07C69/96 ,  C07D327/04 ,  H01G11/28 ,  H01G11/64 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/4235 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2300/0025

Abstract: An electrochemical device includes a negative electrode and an electrolyte solution. The negative electrode includes a negative current collector and a negative electrode mixture layer. The negative electrode mixture layer includes a first section, a second section, and a third section arranged sequentially in a thickness direction. The first section, the second section, and the third section are of an identical thickness. A ratio of a porosity P1 of the first section to a porosity P2 of the third section is P. The electrolyte solution includes an additive A, which is at least one selected from a compound of Formula I or a compound of Formula II:




Based on a total mass of the electrolyte solution, a mass percent of the additive A is w %, satisfying 1≤w≤60, P=P1/P2, and P/(w %+1)≥50%.

公开(公告)号：US20210408594A1

公开(公告)日：2021-12-30

申请号：US16962422

申请日：2020-02-14

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Jianyu LIU ,  Jianming ZHENG ,  Qian WEN ,  Wenqiang LI

IPC: H01M10/0567 ,  H01M10/42

Abstract: An electrolyte, including a fluorine-containing phosphate ester and a carboxylate ester, wherein the fluorine-containing phosphate ester is represented by Formula 1: R1, R2 and R3 are each independently selected from hydrogen, a C1-C10 alkyl group, C1-C10 alkoxy group, C1-C10 haloalkyl group, C1-C10 haloalkoxy group, C1-C10 phosphate ester group, or C1-C10 mono- or multiple-carbonate ester group, wherein at least one of R1, R2 and R3 comprises a fluorine atom. The weight ratio of the fluorine-containing phosphate ester to the carboxylate ester is 0.001-0.5.

公开(公告)号：US20200243906A1

公开(公告)日：2020-07-30

申请号：US16422012

申请日：2019-05-24

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Shuirong ZHANG ,  Wenqiang LI ,  Qian WEN ,  Chao TANG

IPC: H01M10/0567 ,  H01M10/0569 ,  H01M10/0525 ,  H01M10/42 ,  C07C255/05 ,  C07C255/04 ,  C07C255/09

Abstract: The present application provides an electrolyte and an electrochemical device. The electrolyte according to the present application comprises a carboxylate, a barbituric acid compound and a nitrile compound. Adding a barbituric acid compound and a nitrile compound of particular structure to an electrolyte containing a carboxylate solvent can significantly improve the rate performance of an electrochemical device, and mitigate capacity loss after storage at room temperature, and cycle fading and gas generation at high-temperature of the electrochemical device.

公开(公告)号：US20240106002A1

公开(公告)日：2024-03-28

申请号：US18384935

申请日：2023-10-30

Applicant: Ningde Amperex Technology Limited

Inventor： Wenqiang LI ,  Yali XIONG ,  Junfei LIU ,  Lilan ZHANG

IPC: H01M10/0569 ,  H01M4/525 ,  H01M10/0567 ,  H01M10/0568

CPC classification number: H01M10/0569 ,  H01M4/525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/052

Abstract: An electrolyte includes ethyl propionate, propyl propionate, ethylene carbonate, and propylene carbonate, where based on a total mass of the electrolyte, a mass percentage of ethyl propionate is a %, a mass percentage of propyl propionate is b %, a mass percentage of ethylene carbonate is c %, and a mass percentage of propylene carbonate is d %, where 20≤a+b≤50, 0

公开(公告)号：US20230246156A1

公开(公告)日：2023-08-03

申请号：US18193995

申请日：2023-03-31

Applicant: Ningde Amperex Technology Limited

Inventor： Jianyu LIU ,  Wenqiang LI ,  Jianming ZHENG ,  Shuai XU

IPC: H01M4/04 ,  H01M10/0525 ,  H01M10/0569 ,  H01M50/534 ,  H01M10/0567

CPC classification number: H01M4/0404 ,  H01M10/0525 ,  H01M10/0569 ,  H01M50/534 ,  H01M10/0567 ,  H01M2300/0037 ,  H01M2300/0051

Abstract: An electrochemical apparatus, where the electrochemical apparatus includes electrodes, where the electrode includes a current collector, an active material layer disposed on at least one surface of the current collector, a tab disposed on the current collector, and a tab protection layer disposed on the tab, where the tab protection layer includes a first polymer layer, the first polymer layer has a melting point of TA° C., and 110≤TA≤136.5; and an electrolyte, where the electrolyte includes ethylene carbonate and propylene carbonate; based on a weight of the electrolyte, a sum of weight percentages of the ethylene carbonate and the propylene carbonate is Y %, and Y is 20-80; and Y and TA satisfy 0.147

公开(公告)号：US20220059873A1

公开(公告)日：2022-02-24

申请号：US17460926

申请日：2021-08-30

Applicant: Ningde Amperex Technology Limited

Inventor： Yali XIONG ,  Wenqiang LI ,  Mingming GUAN ,  Jianming ZHENG

IPC: H01M10/0569 ,  H01M10/0567 ,  C07D207/46 ,  C07C255/04 ,  C07C255/16 ,  C07C255/05 ,  C07C309/06 ,  C07D327/10

Abstract: An electrolyte includes a compound of formula 1: R1 and R2 are each independently selected from H, halogen atom, a substituted or unsubstituted C1-10 alkyl group, a substituted or unsubstituted C3-10 cycloalkyl group, a substituted or unsubstituted C2-10 alkenyl group, a substituted or unsubstituted C2-10 alkynyl group, a substituted or unsubstituted C1-10 alkoxy group, a substituted or unsubstituted C6-10 aryl group, a substituted or unsubstituted C3-10 heteroaryl group, or any combination thereof. R is selected from a substituted or unsubstituted C1-10 alkyl group, a substituted or unsubstituted C3-10 cycloalkyl group, a substituted or unsubstituted C2-10 alkenyl group, a substituted or unsubstituted C2-10 alkynyl group, a substituted or unsubstituted C1-10 alkoxy group, a substituted or unsubstituted C6-10 aryl group or a substituted or unsubstituted C3-10 heteroaryl group, a substituted or unsubstituted C3-10 heterocycloalkyl group, a butyrolactam group, or any combination thereof.

公开(公告)号：US20200243907A1

公开(公告)日：2020-07-30

申请号：US16735214

申请日：2020-01-06

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Shuirong ZHANG ,  Wenqiang LI ,  Juan MA ,  Chao TANG

IPC: H01M10/0567 ,  H01M10/0568

Abstract: The present application relates to an electrolyte and an electrochemical device. The electrolyte comprises a cesium salt and a nitrile compound. The electrolyte provided in the present application improves rapid charge-discharge performance and cycle performance of a lithium-ion battery while improving the problem of battery gassing during continuous charge.