公开(公告)号：US20210408601A1

公开(公告)日：2021-12-30

申请号：US16961495

申请日：2019-12-26

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

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

IPC: H01M10/0568 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/0567 ,  C07C255/05 ,  C07D319/12

Abstract: An electrolyte includes diglycolic anhydride and a trinitrile compound, with which the cycle performance and the high-temperature stability under over-discharge conditions of lithium-ion batteries are significantly improved. The electrolyte includes 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, halo, 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 halo, 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：US20250070256A1

公开(公告)日：2025-02-27

申请号：US18804403

申请日：2024-08-14

Applicant: Ningde Amperex Technology Limited

Inventor： Junfei LIU ,  Hui CUI ,  Lilan ZHANG

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

Abstract: An electrochemical apparatus includes a positive electrode, a negative electrode, a separator, and an electrolyte. The electrolyte includes a diluent, an electrolytic salt, and a compound of formula III. The diluent is selected from a group consisting of a compound of formula I and a compound of formula II. A molar mass of the diluent is Mz, and based on a total weight of the electrolyte, a percentage of the diluent is z wt %; a molar mass of the electrolytic salt is Mx, and based on the total weight of the electrolyte, a percentage of the electrolytic salt is x wt %; and a molar mass of the compound of formula III is My, and based on the total weight of the electrolyte, a percentage of the compound of formula III is y wt %, satisfying: 0.4 : 1 ≤ y M ⁢ y : x M ⁢ x ≤ 4 : 1 ; and z M ⁢ z y M ⁢ y + x M ⁢ x ≥ 1.5 .

公开(公告)号：US20240363910A1

公开(公告)日：2024-10-31

申请号：US18768551

申请日：2024-07-10

Applicant: Ningde Amperex Technology Limited

Inventor： Lilan ZHANG ,  Chao TANG

IPC: H01M10/42 ,  H01M4/02 ,  H01M4/131 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568

CPC classification number: H01M10/4235 ,  H01M4/131 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M2004/028 ,  H01M2300/0025

Abstract: An electrochemical device includes a positive electrode and an electrolyte. The positive electrode includes a positive current collector and a positive electrode material layer disposed on at least one surface of the positive current collector. After the electrochemical device is charged and discharged for a first cycle, a number of pores in any one region of a 20 μm×20 μm size on the positive current collector is X, where X is an integer ranging from 0 to 10. The electrolyte includes a fluorine-containing sulfonyl imide salt and a fluorine-containing substance Y. Based on a mass of the electrolyte, a mass percent of the fluorine-containing sulfonyl imide salt is A %, and a mass percent of the fluorine-containing substance Y is B %. X, A, and B satisfy: 0≤AX/B≤450.

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：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：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：US20230307709A1

公开(公告)日：2023-09-28

申请号：US18184144

申请日：2023-03-15

Applicant: Ningde Amperex Technology Limited

Inventor： Lilan ZHANG ,  Chao TANG

IPC: H01M10/0567 ,  H01M4/38 ,  H01M4/134 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M4/386 ,  H01M4/134 ,  H01M10/0569 ,  H01M2004/027

Abstract: A negative electrode plate includes a negative electrode current collector and a negative electrode active material layer disposed on the negative electrode current collector. The negative electrode active material layer includes a negative electrode active material. The negative electrode active material contains a silicon-based active material, and a mass percentage of the silicon-based active material based on a mass of the negative electrode active material is X%. The electrolyte contains metal ions. Based on mass of the electrolyte, a mass proportion of the metal ions is A ppm, and 0

公开(公告)号：US20240243358A1

公开(公告)日：2024-07-18

申请号：US18398341

申请日：2023-12-28

Applicant: Ningde Amperex Technology Limited

Inventor： Lilan ZHANG ,  Xiexue PENG ,  Xiao YUAN ,  Chao TANG

IPC: H01M10/0567 ,  C01B25/455 ,  C01B35/12 ,  H01M4/02 ,  H01M4/38 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/42

CPC classification number: H01M10/0567 ,  C01B25/455 ,  C01B35/121 ,  H01M4/38 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/4235 ,  C01P2006/40 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2300/0025

Abstract: An electrolytic solution includes an additive A and an additive B. The additive A includes at least one of additives represented by Formula I or Formula II:




The additive B includes at least one of lithium ditluorophosphate, lithiur difluoro(oxalato)borate, or lithium bis(oxalato)borate. The additive A and additive B added in the electrolytic solution can alleviate the voltage drop of the electrochemical device during high-temperature storage, and increase the capacity retention rate of the electrochemical device during high-temperature storage. Moreover, when the electrochemical device is in a fully charged state, the additive A and additive B can implement decomposition reactions at a cathode interface successively to form a double-protected inorganic CEI layer, thereby improving voltage stability of the cathode interface under high potentials.

公开(公告)号：US20240243344A1

公开(公告)日：2024-07-18

申请号：US18607737

申请日：2024-03-18

Applicant: Ningde Amperex Technology Limited

Inventor： Lilan ZHANG ,  Chao TANG ,  Jianming ZHENG

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

CPC classification number: H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M2300/0025

Abstract: An electrochemical device, including a positive electrode, a negative electrode, a separator and an electrolyte. The electrolyte includes a nitrile compound, and the mass percentage of the nitrile compound in the electrolyte is A %; the negative electrode includes a current collector, wherein the current collector comprises a first region and a second region; the first region is provided with a negative electrode active substance layer; the second region does not comprise a negative electrode active substance layer; the area of the second region is B % of the surface area of the current collector; and A×B

公开(公告)号：US20240154168A1

公开(公告)日：2024-05-09

申请号：US18379188

申请日：2023-10-12

Applicant: Ningde Amperex Technology Limited

Inventor： Lilan ZHANG ,  Mengyan LIN ,  Shan ZHANG ,  Chao TANG

IPC: H01M10/0567 ,  H01M4/36 ,  H01M4/38 ,  H01M4/583

CPC classification number: H01M10/0567 ,  H01M4/366 ,  H01M4/386 ,  H01M4/583 ,  H01M2004/027

Abstract: An electrochemical device includes a positive electrode plate and an electrolytic solution. The electrolytic solution includes a phosphorus additive represented by Formula I:




A mass percent of the phosphorus additive represented by Formula I in the electrolytic solution is A %. The electrolytic solution further includes a first additive. The first additive includes at least one of fluoroethylene carbonate or vinylene carbonate. The positive electrode plate includes a positive active material; the positive active material includes an M element; the M element includes at least one of Al, Mg, Ti, or B; a mass percent of the M element in the positive active material is X %; and 0.0001≤X/A≤40. The electrochemical device is highly stable to thermal shocks.