公开(公告)号：US20200006801A1

公开(公告)日：2020-01-02

申请号：US16272917

申请日：2019-02-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jiao CAO ,  Qifan ZOU ,  Guangbo LU ,  Shengwei WANG ,  Wenzhu XU

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

Abstract: The present disclosure provides a lithium-ion battery, and the lithium-ion battery comprises a positive electrode plate, a negative electrode plate, a separator and an electrolyte. The positive active material comprises a material with a chemical formula of LiaNixCoyM1-x-yO2, the negative active material comprises graphite, the OI value of the positive film represented by OIc and the OI value of the negative film represented by OIa satisfy a relationship: 0.05≤OIa/OIc≤10. By reasonably matching the OI value of the positive film represented by OIc and the OI value of the negative film represented by OIa and making OIa/OIc between 0.05 and 10, the dynamics performance of the positive electrode plate and the dynamics performance of the negative electrode plate can achieve an optimal match, the lithium-ion battery can have higher charging capability, and also have excellent cycle life and excellent safety performance during the long-term fast charging use.