公开(公告)号：US20240421353A1

公开(公告)日：2024-12-19

申请号：US18697481

申请日：2022-12-13

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Yunxian Qian ,  Shiguang Hu ,  Yonghong Deng ,  Weixin Liu ,  Yong Wang ,  Xionggui Lin ,  Li Guo ,  Yanmei Jin

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M10/0525

Abstract: In order to overcome the problems of battery expansion and capacity attenuation of the existing lithium ion battery during long-term high-temperature cycle, the application provides a lithium ion battery, which comprises a positive electrode, a negative electrode and a non-aqueous electrolyte, the non-aqueous electrolyte comprise an additive A, an additive B and an additive C; the lithium ion battery satisfies the following condition: 0 . 0 ⁢ 1 ⁢ 5 ≤ ( a + b + c ) × V ≤ 0.09 ; when the lithium ion battery meets the condition of 0.015≤(a+b+c)×V≤0.09, the problem of gas production of electrolyte during long-term high-temperature cycle can be effectively solved, and the expansion rate of battery can be effectively reduced. Meanwhile, with catalysis under higher voltage, the additive could undergo special oxidation reaction on the positive electrode surface, forming a more stable and good protective film, which makes the positive electrode better protected, thus effectively improving the long-term high-temperature cycle capacity retention rate of the battery.