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.

公开(公告)号：US20200243905A1

公开(公告)日：2020-07-30

申请号：US16454904

申请日：2019-06-27

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Chunrui XU ,  Wenqiang LI ,  Chao TANG ,  Shuirong ZHANG

IPC: H01M10/0564 ,  H01M10/0525

Abstract: The present application relates to an electrolyte, an electrochemical device and an electronic device comprising the same. The electrolyte of the present application includes a cyclic N-containing sulfonyl-compound and at least one of vinylene carbonate, fluoroethylene carbonate, lithium tetrafluoroborate, lithium difluoro(oxalato)borate or lithium difluorophosphate. The electrolyte of the present application may further include a sulfur-oxygen double bond containing compound and a silicon-containing carbonate. Compared with the prior art, using the electrolyte provided by the present application can effectively improve the high-temperature storage, cycle performance and overcharge performance of an electrochemical device, such as a lithium-ion battery.

公开(公告)号：US20200161702A1

公开(公告)日：2020-05-21

申请号：US16406943

申请日：2019-05-08

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Juan MA ,  Shuirong ZHANG ,  Junfei LIU ,  Chao TANG

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

Abstract: The present application relates to an electrolyte and an electrochemical device. The electrolyte includes an organic solvent, an additive and a lithium salt, the additive including a cyclic borate and a nitrile compound. The electrolyte of the present application has good stability at a high working voltage. In another embodiment of the present application, the combination of the electrolyte and an anode having a high compacted density provides a high energy density for the electrochemical device, and improves the storage, floating charge and dynamicperformance of the electrochemical device.

公开(公告)号：US20250158128A1

公开(公告)日：2025-05-15

申请号：US19006912

申请日：2024-12-31

Applicant: Ningde Amperex Technology Limited

Inventor： Rui WANG ,  Xiang WANG ,  Hui CUI ,  Chao TANG

IPC: H01M10/0568 ,  C07C255/05 ,  C07C255/16 ,  H01M10/0525

Abstract: An electrochemical device includes a positive electrode plate, a negative electrode plate and an electrolyte, where the positive electrode plate includes a positive electrode active material layer, and the negative electrode plate includes a negative electrode active material layer. Observed along a thickness direction of the electrochemical device, in a width direction of the negative electrode plate, the negative electrode active material layer includes two protruding regions not overlapping with the positive electrode active material layer on two sides, and a width M mm of the protruding region is 0.5 mm to 2 mm. The electrolyte includes a polynitrile compound, and the polynitrile compound includes a compound represented by formula I-A. Based on a mass of the electrolyte, a mass percentage N % of the polynitrile compound is 0.01% to 8%. 0.01≤M×N

公开(公告)号：US20240332619A1

公开(公告)日：2024-10-03

申请号：US18619244

申请日：2024-03-28

Applicant: Ningde Amperex Technology Limited

Inventor： Junhua JIAN ,  Xiang WANG ,  Hefeng GUO ,  Chao TANG

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/04 ,  H01M4/38 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M4/0404 ,  H01M4/386 ,  H01M10/0569 ,  H01M2004/027

Abstract: An electrolyte includes a non-aqueous organic solvent and an additive A, where the additive A includes a salt composed of anions and cations represented by formula (I); M1 is selected from group IIIA elements, and cations include any one of Li+, Na+, K+, Mg2+, Ca2+, and Zn2+; and based on a mass of the electrolyte, a mass percentage of the additive A is x %, with 0.01≤x≤60. The electrolyte with the additive A included and its mass percentage controlled within the range defined in this application can enhance the stability of the negative electrode interface and the positive electrode interface, reducing the high-temperature gas production of the electrolyte and thereby improving the high-temperature cycling performance and high-temperature storage performance of the secondary battery.

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.

公开(公告)号：US20230198096A1

公开(公告)日：2023-06-22

申请号：US16651736

申请日：2020-03-04

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Xiexue PENG ,  Jianming ZHENG ,  Chao TANG ,  Haiyang NAN

IPC: H01M50/449 ,  H01M10/0525 ,  H01M50/491 ,  H01M50/446 ,  H01M10/0567

CPC classification number: H01M50/449 ,  H01M10/0525 ,  H01M10/0567 ,  H01M50/446 ,  H01M50/491 ,  H01M2300/0025

Abstract: The present application relates to an electrochemical device comprising a separator and an electrolyte, wherein the separator comprises a first porous layer and a second porous layer; and the electrolyte comprises at least one compound containing 2 to 3 cyano groups.

公开(公告)号：US20230123288A1

公开(公告)日：2023-04-20

申请号：US16970864

申请日：2020-03-03

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Lilan ZHANG ,  Chao TANG ,  Jianming ZHENG

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

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