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：US20240021878A1

公开(公告)日：2024-01-18

申请号：US18373983

申请日：2023-09-28

Applicant: Ningde Amperex Technology Limited

Inventor： Jianyu LIU ,  Wenqiang LI ,  Jianming ZHENG

IPC: H01M10/0568 ,  H01M10/0567 ,  H01M4/66 ,  H01M10/0525 ,  H01M10/42

CPC classification number: H01M10/0568 ,  H01M10/0567 ,  H01M4/661 ,  H01M10/0525 ,  H01M10/4235 ,  H01M2300/0037

Abstract: An electrolyte and an electrochemical apparatus containing the electrolyte. The electrolyte includes a fluorine-containing sulfonimide lithium salt and a trinitrile compound, where based on a weight of the electrolyte, a percentage of the fluorine-containing sulfonimide lithium salt is X %, and a percentage of the trinitrile compound is Y %, where 1≤X+Y≤6. The electrolyte in this application can significantly improve safety performance of lithium-ion batteries.

公开(公告)号：US20230395859A1

公开(公告)日：2023-12-07

申请号：US18452049

申请日：2023-08-18

Applicant: Ningde Amperex Technology Limited

Inventor： Hui CUI ,  Wenqiang LI ,  Chao TANG

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/525 ,  H01M10/42

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/525 ,  H01M10/4235 ,  H01M2004/028

Abstract: An electrochemical device includes a positive electrode and an electrolytic solution. The positive electrode includes a positive current collector and a positive active material layer disposed on at least one surface of the positive current collector. The positive active material layer includes a positive active material. The positive active material contains an Mg element. Based on a total weight of the positive active material, a weight of the Mg element is X ppm, and 300≤X≤30000. The electrolytic solution contains carboxylate. Based on a total weight of the electrolytic solution, a weight percent of the carboxylate is Y %, and Y≤60. The electrochemical device satisfies 5≤X/Y≤6000. The electrochemical device effectively improve the high-temperature cycle performance and low-temperature discharge performance of the electrochemical device by controlling a relationship between the electrolytic solution and the positive active material.

公开(公告)号：US20220006122A1

公开(公告)日：2022-01-06

申请号：US17475704

申请日：2021-09-15

Applicant: Ningde Amperex Technology Limited

Inventor： Hui CUI ,  Wenqiang LI ,  Yali XIONG ,  Jianming ZHENG

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/46

Abstract: An electrochemical device includes a positive electrode, a negative electrode, a separator, and an electrolyte, where the electrolyte contains a nitrile compound and transition metal ions, and satisfies 5≤A/B≤30000, where based on a molar mass of the electrolyte, a molar percentage of a cyano group in the electrolyte is A %, and based on a weight of the electrolyte, a weight percentage of the transition metal ions in the electrolyte is B %. The electrochemical device ensures that the cyano group and the transition metal ions in the electrolyte satisfy a specified relationship, to reduce leaching of the transition metal ions from a positive electrode active material and stabilize structural distortion of the positive electrode active material in a charge and discharge process, thereby improving high-temperature cycle performance and floating charge performance of the electrochemical device.