公开(公告)号：US20250096264A1

公开(公告)日：2025-03-20

申请号：US18580814

申请日：2022-07-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuta Kuroda ,  Yosuke Sato ,  Keiko Kato

IPC: H01M4/583 ,  H01M4/02 ,  H01M4/133

Abstract: A negative electrode for a secondary battery includes a negative electrode current collector and a negative electrode mixture layer including a negative electrode active material, wherein the negative electrode active material includes carbon particles and Si-containing particles, and in a distribution in a plane direction of the negative electrode mixture layer of a presence probability of Si element in a thickness direction of the negative electrode mixture layer, a difference of an upper limit value Rmax and a lower limit value Rmin in a 1σ region: Rmax−Rmin is 20% or less.