公开(公告)号：US20230318038A1

公开(公告)日：2023-10-05

申请号：US18331320

申请日：2023-06-08

Applicant: Ningde Amperex Technology Limited

Inventor： Shuirong ZHANG ,  Lilan ZHANG ,  Xiao YUAN ,  Chao TANG

IPC: H01M10/0567 ,  H01M4/134 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M4/134 ,  H01M10/0569 ,  H01M2004/027

Abstract: An electrochemical apparatus, including a positive electrode, a negative electrode, and an electrolyte, where the electrolyte includes fluoroethylene carbonate and non-fluorinated cyclic carbonate, the fluoroethylene carbonate accounts for a % of the electrolyte by mass, and the non-fluorinated cyclic carbonate accounts for b % of the electrolyte by mass, where 0.05≤a/b≤2.5.

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.

公开(公告)号：US20210408602A1

公开(公告)日：2021-12-30

申请号：US16961826

申请日：2019-12-26

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Chao TANG ,  Jianming ZHENG

IPC: H01M10/0568 ,  H01M10/0567 ,  H01M10/0569 ,  C07C255/05 ,  C07D327/06 ,  H01M50/417 ,  H01M50/449 ,  H01M4/38 ,  H01M4/48 ,  H01M4/36

Abstract: An electrolyte, including: a compound of Formula I, and at least one of a compound of Formula II or a compound of Formula III, R1, R2, R3 and R4 are each independently selected from hydrogen, fluoro, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl, substituted or unsubstituted C2-C10 alkynyl, substituted or unsubstituted C6-C12 aryl, substituted or unsubstituted C1-C10 alkoxy, or substituted or unsubstituted C6-C12 aryloxy, wherein when substituted, the substituent is fluoro, cyano or C1-C10 alkyl; and a, d and f are each independently selected from an integer from 1 to 5, and b, c, e, g, h and i are each independently selected from an integer from 0 to 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.