公开(公告)号：US20240055663A1

公开(公告)日：2024-02-15

申请号：US18491292

申请日：2023-10-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chang PENG ,  Peipei CHEN ,  Limei ZHANG ,  Degui WU

IPC: H01M10/0567 ,  H01M10/0569 ,  H01M10/0568 ,  H01M10/0525 ,  C07D327/04

CPC classification number: H01M10/0567 ,  H01M10/0569 ,  H01M10/0568 ,  H01M10/0525 ,  C07D327/04 ,  H01M2220/20 ,  H01M2300/004

Abstract: The present disclosure relates to an electrolytic solution for a lithium-ion secondary battery including a solvent, additive, and lithium salt. The solvent includes carboxylic ester, and the additive includes fluorosulfonic acid lactone of Formula I in the description. In the electrolytic solution, a content W of carboxylic ester and a content a of fluorosulfonic acid lactone of Formula I satisfy 430.1>1000*a/W>0.163, optionally 202.02>1000*a/w≥1.635, and further optionally 100.059≥1000*a/w≥4.915, where a and W are both in wt % based on a weight of the electrolytic solution. The secondary battery containing the electrolytic solution has excellent quick charging performance and a long cycle life.

公开(公告)号：US20240274877A1

公开(公告)日：2024-08-15

申请号：US18419337

申请日：2024-01-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chang PENG ,  Peipei CHEN ,  Degui WU ,  Hailin ZOU

IPC: H01M10/0567 ,  C07D327/04 ,  C07D327/10 ,  C07F7/08 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  C07D327/04 ,  C07D327/10 ,  C07F7/0805 ,  H01M10/0525 ,  H01M2220/20 ,  H01M2300/0025

Abstract: An electrolyte includes a solvent, an additive composition, and a lithium salt. The additive composition includes a compound of formula I and at least one of compounds of formula LI and formula III.




In the formulas, the symbols are as defined in the specification.

公开(公告)号：US20230387463A1

公开(公告)日：2023-11-30

申请号：US18229715

申请日：2023-08-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chang PENG ,  Peipei CHEN ,  Hailin ZOU ,  Degui WU

IPC: H01M10/0567 ,  H01M50/204

CPC classification number: H01M10/0567 ,  H01M2220/20 ,  H01M50/204

Abstract: This application relates to a secondary battery including an electrolyte and a positive electrode plate, where the electrolyte may include a compound represented by formula (I):




The positive electrode plate may include a positive electrode active material, where a surface residual lithium content of the positive electrode active material may be 20 ppm to 2,000 ppm.