公开(公告)号：US20240413408A1

公开(公告)日：2024-12-12

申请号：US18810528

申请日：2024-08-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Meng Qin ,  Yingjie Guan ,  Qingyan Ma ,  Huiling Yang ,  Yan Wen ,  Qisen Huang

IPC: H01M10/42 ,  H01M4/02 ,  H01M4/587 ,  H01M10/0568 ,  H01M10/0569

Abstract: Provided is a secondary battery including a positive electrode plate, a negative electrode plate, and an electrolyte. The positive electrode plate includes a positive current collector and a positive active material layer arranged on the positive current collector, and the positive active material layer contains a sodium ion active material. The negative electrode plate includes a negative current collector and a negative film layer arranged on at least one surface of the negative current collector, and the negative film layer contains a carbon material. The electrolyte is arranged between the positive electrode plate and the negative electrode plate, and the electrolyte contains a sodium borate.

公开(公告)号：US20240413399A1

公开(公告)日：2024-12-12

申请号：US18810521

申请日：2024-08-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Meng Qin ,  Yingjie Guan ,  Qingyan Ma ,  Huiling Yang ,  Yan Wen ,  Qisen Huang

IPC: H01M10/0567 ,  H01M4/04 ,  H01M4/62 ,  H01M10/054 ,  H01M10/0569 ,  H01M50/249

Abstract: Provided is a secondary battery including a positive electrode plate, a negative electrode plate, and an electrolyte. The positive electrode plate includes a positive current collector and a positive active material layer arranged on the positive current collector, and the positive active material layer contains a sodium ion active material. The negative electrode plate includes a negative current collector and a metal film layer arranged on at least one surface of the negative current collector. A nucleation overpotential of sodium on the negative electrode plate is smaller than or equal to 35 mV. The electrolyte is arranged between the positive electrode plate and the negative electrode plate, and the electrolyte contains a sodium borate.