公开(公告)号：US20230299303A1

公开(公告)日：2023-09-21

申请号：US18323407

申请日：2023-05-25

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yuping Huang ,  Mingfeng Lin ,  Yunjian Ma ,  Xiaofeng Zhen ,  Yang Hu ,  Haikun Zhao ,  Yalin Ma ,  Xing Tong

IPC: H01M4/62 ,  H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  H01M10/0568 ,  H01M10/052

CPC classification number: H01M4/628 ,  H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  H01M10/0568 ,  H01M10/052

Abstract: A secondary battery, including a negative electrode plate and an electrolyte are provided. In some embodiments, the negative electrode plate includes a negative electrode current collector and a negative electrode active substance layer, a first metal oxide layer, and a second metal ion adsorption layer that are sequentially arranged on at least one surface of the negative electrode current collector; the first metal oxide is selected from at least one of manganese dioxide, molybdenum oxide, magnesium oxide, aluminum oxide, and phosphorus pentoxide; and the electrolyte contains second metal ions. In the secondary battery provided in this application, the first metal oxide layer is provided on the negative electrode plate, and the second metal ion adsorption layer is formed on a negative electrode to serve as a protective layer, thereby inhibiting decomposition of electrolytes and improving cycling performance and rate performance of battery cells.