公开(公告)号：US20220123364A1

公开(公告)日：2022-04-21

申请号：US17565474

申请日：2021-12-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yongkun LI ,  Kai WU ,  Bo CHENG ,  Feng JU

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

Abstract: In the embodiments of the present application, an electrolyte, a lithium-ion battery comprising the electrolyte, a battery module, a battery pack, and a device are provided. The electrolyte in the embodiments of the present application comprises an organic solvent, an electrolyte lithium salt dissolved in the organic solvent, and an additive comprising a first additive and a second additive. The first additive is selected from one or more of the compounds represented by formula I, and the second additive is selected from one or more of the compounds represented by formula II. After applying the electrolyte of the present application to a lithium-ion battery, the lithium ion battery has a better cycle performance and storage performance at a high temperature, and lower direct-current impedance at a low temperature, such that the lithium ion battery has both a better high-temperature performance and a better low-temperature performance.

公开(公告)号：US20210305552A1

公开(公告)日：2021-09-30

申请号：US17345109

申请日：2021-06-11

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Bo CHENG ,  Changlong Han

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/48 ,  H01M50/446 ,  H01M50/431

Abstract: The present application relates to a composite material with a core-shell structure for battery, wherein the core is made of a core material including metallic copper or a copper-containing compound; the shell is made of a shell material including at least one of silicon dioxide and titanium dioxide; and the core material has an average particle size D50 of 0.01 μm-5 μm, optionally 0.1 μm-3 μm, and more optionally 0.1 μm-2 μm. The present application also relates to secondary battery containing the composite material, a battery module, a battery pack, and an apparatus.