公开(公告)号：US20240282943A1

公开(公告)日：2024-08-22

申请号：US18620055

申请日：2024-03-28

Applicant: Ningde Amperex Technology Limited

Inventor： Chunrui XU ,  Yanyan XU ,  Shaoyun ZHOU

IPC: H01M4/38 ,  H01M4/02 ,  H01M10/0568 ,  H01M10/0569

CPC classification number: H01M4/38 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2004/028 ,  H01M2300/0042 ,  H01M2300/0051

Abstract: An electrochemical apparatus includes a positive electrode plate, a negative electrode plate, a separator, and an electrolyte, where the positive electrode plate includes a positive electrode active material, the positive electrode active material includes element Co, and the electrolyte includes a polynitrile compound. The amount of the polynitrile compound is adjusted according to the amount of element Co in the positive electrode active material, and the polynitrile compound is in coordination complexation with Co with other additives used in combination. The structural stability of the positive electrode material with lithium highly released is significantly improved, inhibiting leaching of Co, reducing oxidization of the electrolyte by the positive electrode active material, and inhibiting related side reactions, thereby effectively improving performance of the electrochemical apparatus under high temperature.

公开(公告)号：US20240243362A1

公开(公告)日：2024-07-18

申请号：US18622298

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Chunrui XU ,  Shaoyun ZHOU

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/58 ,  H01M4/583 ,  H01M10/0525 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M4/5825 ,  H01M4/583 ,  H01M10/0525 ,  H01M10/0569 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028

Abstract: An electrochemical device includes a positive electrode, a negative electrode, a separator, and an electrolytic solution. The electrolytic solution includes a lithium salt, an organic solvent, and an additive. A normal-temperature conductivity of the electrolytic solution is b mS/cm, a single-side coating weight of one positive electrode plate is a g/1540.25 mm2, and a relationship between a and b satisfies: b≥50.859a2−16.044a+8.2071, where 0.2≤a≤0.55. The electrochemical device is improved with respect to long-term cycle performance and high-temperature storage performance, and maintains excellent charge performance and energy efficiency.

公开(公告)号：US20250070257A1

公开(公告)日：2025-02-27

申请号：US18941421

申请日：2024-11-08

Applicant: Ningde Amperex Technology Limited

Inventor： Chunrui XU

IPC: H01M10/0569 ,  H01M4/02 ,  H01M10/0567 ,  H01M10/0568 ,  H01M50/533

Abstract: An electrochemical apparatus includes a positive electrode plate and an electrolyte, where the positive electrode plate includes a positive tab, and a working length b of the positive tab is 0.5 m to 3 m; the electrolyte includes cyclic carbonate, where a mass percentage of the cyclic carbonate is a % based on a mass of the electrolyte, and the cyclic carbonate includes ethylene carbonate and/or propylene carbonate; and 13≤a/b≤110.

公开(公告)号：US20240234815A1

公开(公告)日：2024-07-11

申请号：US18606708

申请日：2024-03-15

Applicant: Ningde Amperex Technology Limited

Inventor： Chunrui XU ,  Yanyan XU ,  Jianming ZHENG ,  Chao TANG

IPC: H01M10/0567 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M10/0569 ,  H01M2300/0034 ,  H01M2300/004

Abstract: An electrolytic solution, an electrochemical device containing the electrolytic solution, and an electronic device. The electrolytic solution includes ethylene carbonate, propylene carbonate, and fluoroethylene carbonate. Based on a mass of the electrolytic solution, a mass percent of the ethylene carbonate is a, a mass percent b of the propylene carbonate is 12% to 35%, a mass percent c of the fluoroethylene carbonate is 0.2% to 2.5%, and the electrolytic solution satisfies 0.1≤a/b≤0.75.

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：US20250023103A1

公开(公告)日：2025-01-16

申请号：US18901400

申请日：2024-09-30

Applicant: Ningde Amperex Technology Limited

Inventor： Chunrui XU ,  Shaoyun ZHOU

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

Abstract: An electrochemical apparatus including: a positive electrode, where the positive electrode includes a positive electrode active material layer, and the positive electrode active material layer includes a positive electrode active material, wherein the positive electrode active material includes lithium nickel oxide and an electrolyte. The electrolyte includes fluoroethylene carbonate, where based on a total mass of the electrolyte, a mass percentage of the fluoroethylene carbonate is a %. In this application, a charge cut-off voltage U V of the electrochemical apparatus, a molar ratio x of nickel in the lithium nickel oxide, and the mass percentage a % of the fluoroethylene carbonate in the electrolyte satisfy the following relationship: a ≤ 2.3 x 0.7 - 6 ⁢ x 0 . 1 ( U - 4 . 2 ) .

公开(公告)号：US20230070028A1

公开(公告)日：2023-03-09

申请号：US17900219

申请日：2022-08-31

Applicant: Ningde Amperex Technology Limited

Inventor： Chunrui XU ,  Xi HU ,  Chao TANG

IPC: H01M10/0566 ,  H01M10/0525

Abstract: An electrochemical apparatus includes a positive electrode plate, a negative electrode plate, a separator, and an electrolyte. The negative electrode plate includes a negative electrode active material layer, and the negative electrode active material layer includes a negative electrode active material, where mass of the negative electrode active material is a g. The electrolyte includes ethylene carbonate, where based on a mass of the electrolyte, a mass percentage of the ethylene carbonate is b%, and 1.6≤b/a≤6.4. A ratio of the mass percentage of the ethylene carbonate in the electrolyte to the mass of the negative electrode active material is controlled, so that cycling performance, a thickness swelling rate after high-temperature storage, a capacity retention rate after storage, and safety performance of the electrochemical apparatus can be improved.

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.