公开(公告)号：US20240290960A1

公开(公告)日：2024-08-29

申请号：US18693335

申请日：2022-06-23

申请人： Panasonic Energy Co., Ltd.

发明人： Masashi Aotani

IPC分类号： H01M4/36 ,  H01M4/02 ,  H01M4/131 ,  H01M4/525

CPC分类号： H01M4/366 ,  H01M4/131 ,  H01M4/525 ,  H01M2004/021 ,  H01M2004/028

摘要： A nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure is provided with a positive electrode, a negative electrode, a separator that separates the positive electrode and the negative electrode from each other, and a nonaqueous electrolyte. With respect to this nonaqueous electrolyte secondary battery, the positive electrode comprises a positive electrode collector, a first positive electrode mixture layer that is formed on the surface of the positive electrode collector, and a second positive electrode mixture layer that is formed on the surface of the first positive electrode mixture layer; the first positive electrode mixture layer contains a first positive electrode active material; the second positive electrode mixture layer contains a second positive electrode active material; and the Ni content ratio in the second positive electrode active material is lower than the Ni content ratio in the first positive electrode active material.