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

公开(公告)号：US20220223915A1

公开(公告)日：2022-07-14

申请号：US17708622

申请日：2022-03-30

Applicant: Ningde Amperex Technology Limited

Inventor： ShuiRong ZHANG ,  Xiao YUAN ,  Lilan ZHANG ,  Chao TANG

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

Abstract: An electrolyte including a dinitrile compound, a multi-nitrile compound with more than 2 cyano groups, and a boron-containing lithium salt. Based on a total weight of the electrolyte, a content of the dinitrile compound is A %, a content of the multi-nitrile compound is B %, and a content of the boron-containing lithium salt is C %, and 0≤(A/B)−C+1≤11. The cycle performance of the electrochemical device including the electrolyte is improved at a high temperature and in a high state of charge.

公开(公告)号：US20210408595A1

公开(公告)日：2021-12-30

申请号：US16962777

申请日：2019-12-26

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

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

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  C07D327/00 ,  H01M4/36 ,  H01M4/583 ,  H01M4/133

Abstract: An electrochemical device including a positive electrode, a negative electrode and an electrolyte, wherein the negative electrode comprises a negative electrode active material layer, including a negative electrode active material, wherein the negative electrode active material includes a silicon-containing compound; and the negative electrode active material further includes, on the surface, a protective layer including a compound having an S═O bond.