公开(公告)号：US20250023102A1

公开(公告)日：2025-01-16

申请号：US18901349

申请日：2024-09-30

Applicant: Ningde Amperex Technology Limited

Inventor： Junfei LIU ,  Disheng LAN ,  Chao TANG ,  Xiexue PENG

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0569

Abstract: An electrolyte includes fluoroethylene carbonate, where a percentage a of the fluoroethylene carbonate is 0.01% to 5% based on mass of the electrolyte; the positive electrode includes a positive electrode active material, where the positive electrode active material contains element Mn, and a percentage of the element Mn is greater than or equal to 15% based on mass of the positive electrode active material; and the positive electrode active material has a unit reaction area c measured in m2/cm2, where a and c satisfy the following relationship: 0.0006≤a/c≤6.25, and the unit reaction area is a product of a weight W of the positive electrode active material per unit area and a specific surface area BET of the positive electrode active material.

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：US20240047749A1

公开(公告)日：2024-02-08

申请号：US18374786

申请日：2023-09-29

Applicant: Ningde Amperex Technology Limited

Inventor： Junfei LIU ,  Chao TANG

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M4/36

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M4/366 ,  H01M2004/027

Abstract: An electrochemical device includes a negative electrode and an electrolytic solution. The negative electrode includes a negative current collector and a negative active material layer disposed on at least one surface of the negative current collector. The negative active material layer includes a first region and a second region. A thickness of any position of the first region is less than an average thickness of the second region. The electrolytic solution includes a salt containing a P—O bond, and the salt accounts for a given content. The electrochemical device according to this application achieves excellent cycle performance.

公开(公告)号：US20230261264A1

公开(公告)日：2023-08-17

申请号：US18193976

申请日：2023-03-31

Applicant: Ningde Amperex Technology Limited

Inventor： Shuirong ZHANG ,  Junfei LIU ,  Chao TANG

IPC: H01M10/0569 ,  H01M4/38 ,  H01M4/62 ,  H01M4/587 ,  H01M4/134 ,  H01M4/133

CPC classification number: H01M10/0569 ,  H01M4/386 ,  H01M4/628 ,  H01M4/587 ,  H01M4/134 ,  H01M4/133 ,  H01M2300/0034 ,  H01M2300/0037 ,  H01M2004/027

Abstract: An electrochemical device, including a positive electrode, a negative electrode, a separator, and an electrolytic solution. The negative electrode includes a negative active material layer. The negative active material layer includes a silicon material. The electrolytic solution includes fluorocarbonate and cyclic ether. A weight percent of the fluorocarbonate, a weight percent of the cyclic ether, and a unit reaction area of the negative active material layer satisfy a specific relational expression, thereby improving the high-temperature storage performance and the high-temperature cycle performance of the electrochemical device.

公开(公告)号：US20230155173A1

公开(公告)日：2023-05-18

申请号：US16976938

申请日：2020-03-03

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Junfei LIU ,  Lilan ZHANG ,  Chao TANG ,  Jianming ZHENG

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/42 ,  H01M4/48 ,  H01M4/587

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/4235 ,  H01M4/483 ,  H01M4/587 ,  H01M2004/027

Abstract: An electrolyte including an imidazolium salt compound and a pyridine compound. The electrolyte, includes a compound of Formula I and a compound of Formula II:




where R1 is selected from halo, cyano, substituted or unsubstituted C1-C12 alkyl, substituted or unsubstituted C2-C12 alkenyl, substituted or unsubstituted C2-C12 alkynyl, substituted or unsubstituted C2-C12 alkoxy, substituted or unsubstituted C3-C12 cycloalkyl, and substituted or unsubstituted C6-C12 aryl; and R11, R12, R13, R14 and R15 are each independently selected from H, halo, cyano, substituted or unsubstituted C1-C12 alkyl, substituted or unsubstituted C2-C12 alkenyl, substituted or unsubstituted C2-C12 alkynyl, substituted or unsubstituted C2-C12 alkoxy, substituted or unsubstituted C3-C12 cycloalkyl, and substituted or unsubstituted C6-C12 aryl; when substituted, the substituent is halo or cyano. The electrolyte has high stability and can significantly improve the cycle performance and high-temperature storage performance of electrochemical devices.

公开(公告)号：US20220131196A1

公开(公告)日：2022-04-28

申请号：US17569307

申请日：2022-01-05

Applicant: Ningde Amperex Technology Limited

Inventor： Junfei LIU ,  Shuirong ZHANG ,  Chao TANG ,  Jianming ZHENG

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525

Abstract: An electrochemical device includes a positive electrode, a negative electrode, a separator located between the positive electrode and the negative electrode, and an electrolytic solution. The positive electrode includes a positive current collector and a positive active material layer disposed on the positive current collector. The positive active material layer includes a positive active material. The positive active material includes an element A. The element A is selected from at least one of Al, B, Ca, Mg, Ti, Cu, Nb, Si, Zr, Y, or W. The electrolytic solution includes at least one of 1,3-propane sultone or a derivative thereof. A mass ratio of the element A in the positive active material to 1,3-propane sultone or a derivative is 1:0.2 to 1:50.