公开(公告)号：US20250149654A1

公开(公告)日：2025-05-08

申请号：US18836867

申请日：2023-02-07

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuta Nishimori ,  Yoshinori Satou ,  Takashi Sasaki ,  Maho Harada ,  Takahito Nakayama

IPC: H01M10/42 ,  H01M4/02 ,  H01M4/131 ,  H01M4/36 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525

Abstract: A secondary battery includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a lithium-ion conductive electrolyte. The positive electrode includes a positive electrode current collector, and a positive electrode active material layer. The positive electrode active material layer contains a first metal oxide including a lithium-containing transition metal oxide that is a positive electrode active material, and a different second metal oxide. A metal element M contained in the second metal oxide includes an atom m1 and an atom m2 that are the same element having different valences from each other. The metal element M is at least one metal element selected from the group consisting of Al, Ti, Si, Zr, Mg, Nb, Ta, Sn, Ni, V, and Cr. An oxide of the atom m1 and the atom m2 are different in temperature dependence of electrical resistance.