公开(公告)号：US20200091558A1

公开(公告)日：2020-03-19

申请号：US16562114

申请日：2019-09-05

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiang ZHOU ,  Xiaomei LIU ,  Shipeng LI ,  Jiang LIU ,  Guobao WANG

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/587 ,  H01M4/136 ,  H01M4/58

Abstract: The present disclosure provides a lithium-ion battery comprising an electrode assembly, an electrolyte and a case. The electrolyte comprises a lithium salt and an organic solvent which comprises a cyclic ester, a mass of the cyclic ester is equal to or less than 10% of a total mass of the organic solvent. A negative electrode active material at least comprises a carbon-based negative electrode material which in the negative electrode film exists in a form of a pre-lithium-intercalation compound LiCx formed by lithiation with a lithium metal, 12≤x≤150; a capacity of the negative electrode active material per unit area/(a capacity of the positive electrode active material per unit area+a capacity of active lithium ions of the pre-lithium-intercalation compound LiCx which can be intercalated and deintercalated in the negative electrode film per unit area)≥1.10.