公开(公告)号：US20240405373A1

公开(公告)日：2024-12-05

申请号：US18696828

申请日：2022-09-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryohei MIYAMAE ,  Akira KANO ,  Shinichiro KONDO

IPC: H01M50/457 ,  H01M4/38 ,  H01M10/052 ,  H01M10/42 ,  H01M50/414 ,  H01M50/431 ,  H01M50/443 ,  H01M50/446 ,  H01M50/451 ,  H01M50/463

Abstract: A disclosed lithium secondary battery includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte having lithium ion conductivity. The negative electrode is an electrode on which lithium metal is deposited during charging and from which the lithium metal dissolves during discharging. The separator includes a substrate, a heat-resistant layer, and a spacer. The heat-resistant layer is formed on at least one main surface selected from two main surfaces of the substrate. The spacer is disposed on the positive electrode side with respect to the substrate and the heat-resistant layer. An average height of the spacer is larger than a sum of an average thickness of the substrate and an average thickness of the heat-resistant layer.