公开(公告)号：US20200295348A1

公开(公告)日：2020-09-17

申请号：US16810392

申请日：2020-03-05

Applicant: TDK CORPORATION

Inventor： Yuusuke YAMAGUCHI ,  Tohru INOUE ,  Yasuhiro TAKAGI

IPC: H01M4/131 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0585 ,  H01M10/0525

Abstract: Disclosed herein is a negative electrode for non-aqueous electrolyte secondary battery that includes a negative electrode current collector, and a negative electrode active material layer. An area change rate and a thickness change rate of the negative electrode active material layer associated with charging are 0.1% or more and 10% or more, respectively. A triangular region having an intersection between first and second straight lines, a first point existing on the first straight line and being away from the intersection in the first direction toward the first side by a first distance, and a second point exists on the second straight line and being away from the intersection in the second direction toward the second side by a second distance, as vertices are cut away such that the triangular region has neither the negative electrode current collector nor the negative electrode active material layer.