公开(公告)号：US20240274889A1

公开(公告)日：2024-08-15

申请号：US18644427

申请日：2024-04-24

申请人： MURATA MANUFACTURING CO., LTD.

发明人： Yuichiro SUGAUCHI ,  Yoshinori WAKUI

IPC分类号： H01M10/0587 ,  H01M4/02 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M50/107 ,  H01M50/247 ,  H01M50/249 ,  H01M50/417 ,  H01M50/449

CPC分类号： H01M10/0587 ,  H01M4/364 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M50/107 ,  H01M50/247 ,  H01M50/249 ,  H01M50/417 ,  H01M50/449 ,  H01M2004/027 ,  H01M2004/028

摘要： A secondary battery includes an electrode wound body, a positive electrode current collector plate, a negative electrode current collector plate, an electrolytic solution, and a battery can. The electrode wound body includes a positive electrode and a negative electrode. The positive electrode includes a positive electrode current collector, and a positive electrode active material layer covering the positive electrode current collector. The electrolytic solution includes an impregnation electrolytic solution with which the electrode wound body is impregnated, and a non-impregnation electrolytic solution with which the electrode wound body is not impregnated. The non-impregnation electrolytic solution includes a dinitrile compound. A ratio of a weight of the dinitrile compound included in the non-impregnation electrolytic solution to a total area of the positive electrode active material layer covering the positive electrode current collector is within a range from 2.00 μg/cm2 to 25.00 μg/cm2 both inclusive.