公开(公告)号：US12100838B2

公开(公告)日：2024-09-24

申请号：US17274668

申请日：2019-09-10

Applicant: GS Yuasa International Ltd.

Inventor： Kenta Ogi ,  Fumiya Nakano ,  Ryosuke Shimokawa ,  Shota Ito ,  Masaki Masuda ,  Taro Yamafuku ,  Kei Kumabayashi ,  Akihiko Miyazaki

IPC: H01M4/587 ,  H01G11/32 ,  H01G11/78 ,  H01G11/86 ,  H01M4/02 ,  H01M4/133 ,  H01M4/1393 ,  H01M50/574 ,  H01M50/578

CPC classification number: H01M4/587 ,  H01G11/32 ,  H01G11/78 ,  H01G11/86 ,  H01M4/133 ,  H01M4/1393 ,  H01M50/574 ,  H01M50/578 ,  H01M2004/021 ,  H01M2004/027

Abstract: An aspect of the present invention is an energy storage device including an electrode assembly that has a negative electrode and a positive electrode, where the negative electrode contains a negative electrode substrate and a negative active material, and has a negative active material layer disposed in an unpressed shape along at least one surface of the negative electrode substrate, the negative active material includes solid graphite particles as a main component, and the solid graphite particles have an aspect ratio of 1 or more and 5 or less.